Download or read book The Design and Synthesis of Luminescent Iridium and Platinum Complexes Featuring Bi Tri and Tetra dentate Ligands written by David Patrick O'Farrell and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Synthesis and Luminescence Properties of Platinum Palladium and Iridium Complexes Featuring Multidentate Ligands written by Melissa Teresa Walden and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Luminescent Platinum ii Complexes Containing Dianionic Tetradentate Ligands Having Mixed Oxygen Nitrogen and Carbon Donor Atoms and Platinum ii Containing Phosphorescent Polymers written by Wai-Yip Tong and published by Open Dissertation Press. This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Luminescent Platinum(II) Complexes Containing Dianionic Tetradentate Ligands Having Mixed Oxygen, Nitrogen and Carbon Donor Atoms and Platinum(II)-containing Phosphorescent Polymers: Synthesis, Photophysical Properties and Material Applications" by Wai-yip, Tong, 唐煒燁, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled LUMINESCENT PLATINUM(II) COMPLEXES CONTAINING DIANIONIC TETRADENTATE LIGANDS HAVING MIXED OXYGEN, NITROGEN AND CARBON DONOR ATOMS AND PLATINUM(II)-CONTAINING PHOSPHORESCENT POLYMERS: SYNTHESIS, PHOTOPHYSICAL PROPERTIES AND MATERIAL APPLICATIONS Submitted by TONG WAI YIP for the degree of Doctor of Philosophy at The University of Hong Kong in May 2014 Square planar platinum(II) complexes exhibit rich photophysical properties which are tunable through the structural variation of ligands and can be harnessed for applications in materials science. In this thesis, the great variety of spectroscopic properties of various square planar cyclometalated platinum(II) complexes supported by tetradentate (O DEGREESN DEGREESN DEGREESC and O DEGREESN DEGREESC DEGREESN) and tridentate (C DEGREESN DEGREESN) ligands containing dipyridyl moieties will be highlighted, along with their synthesis, characterization and potential application in organic light emitting diodes (OLEDs). Ind Platinum(II) complexes supported by tetradentate O DEGREESN DEGREESN DEGREESC or O DEGREESN DEGREESN DEGREESC types of ligands (O DEGREESN DEGREESN DEGREESC = 2-(4-(3,5-di-tert-butylphenyl)-6'-phenyl-2,2'- Ind bipyridin-6-yl)phenolate; O DEGREESN DEGREESN DEGREESC = 5,5-dialkyl-2-(6-phenylpyridin-2-yl) indeno[1,2-b]pyridin-9-olate) are emissive in solution at room temperature, with emission maxima tunable from 582 nm to 640 nm and quantum yields up to 0.28. Mechanochromism and the associated luminescence change in [Pt(dihexyl- Ind O DEGREESN DEGREESN DEGREESC)] (Complex 3.6) were found associated with the two different crystal packings revealed by powder X-ray diffraction (PXRD) studies. Fast vapochromic response of [Pt(3-O DEGREESN DEGREESN-2,6-difluoropyridine)] (Complex 3.3) on chloroform or dichloromethane vapours was found to be associated with structural changes in the solid state through PXRD studies. Robust and strongly emissive platinum(II) complexes supported by tetradentate O DEGREESN DEGREESC DEGREESN ligands featuring fused six-five-six membered metallacyclic ring (O DEGREESN DEGREESC DEGREESN = 2-(4-(3,5-di-tert-butylphenyl)-6-(9-(pyridin-2-yl) carbazol-2-yl)pyridin-2-yl)phenol) have been prepared. These platinum(II) complexes are among the most efficient yellow phosphors, with emission maxima ranging from 526 nm to 553 nm and luminescence quantum yields as high as -1 0.47-0.86. A yellow OLED with power efficiency (η ) up to 52 lm W is power demonstrated. In combination with the typical blue emitting iridium(III) 2' bis(4,6-difluorophenyl-pyridinato-N, C ) picolinate (FIrpic), white organic -1 light-emitting diodes (WOLEDs) displayed η up to 61 lm W and reduced power -2 efficiency roll-off at 1000 cd m . Random copolymers with photo-inert backbone poly[(N-vinylcarbazole)-co- ((R-C DEGREESN DEGREESN)Pt)] and poly[(2-(4-tert-butylphenyl)-5-(4-vinylphenyl)-1,3,4- oxadiazole)-co-((R-C DEGREESN DEGREESN)Pt)] (R-C DEGREESN DEGREESN = 3-(6-phenyl-4-(4-vinylphenyl) pyridine-2-yl)-isoquinoline or 3-(4-(4-(dec-9-enyloxy)phenyl)-6-phenylpyridin- 2-yl)isoquinoline) have been synthesized and characterized. Energy transfer between the charge transporting units and emissive (R-C DEGREESN DEGREESN)Pt units was revealed through ICP-MS inve

Download or read book DESIGN SYNTHESIS OF LUMINESC written by Suk-Hang Lam and published by Open Dissertation Press. This book was released on 2017-01-26 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Design and Synthesis of Luminescent Platinum(II) and Gold(III) Complexes With Tridentate Pincer-type Ligands: From Computational Study to Experiments and Application Studies" by Suk-hang, Lam, 林淑恒, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled DESIGN AND SYNTHESIS OF LUMINESCENT PLATINUM(II) AND GOLD(III) COMPLEXES WITH TRIDENTATE PINCER-TYPE LIGANDS - FROM COMPUTATIONAL STUDY TO EXPERIMENTS AND APPLICATION STUDIES Submitted by LAM Suk Hang for the degree of Doctor of Philosophy at The University of Hong Kong in June 2015 Square planar platinum(II) and gold(III) complexes possess unique spectroscopic and photophysical properties which enable them as promising candidates for many applications such as optoelectronic devices and biological sensors. The understanding of the intrinsic properties of these complexes is therefore essential to optimize their performance as well as provide guidance on the molecular design for specific applications. This thesis aims to provide useful insights for the molecular design strategies with the aid of computational studies to tune the electronic properties of these complexes and electroluminescence studies in the fabrication of organic light-emitting devices (OLEDs). Computational studies have been performed to inspect electronic structures and photophysical properties as well as their correlation with the nature of ancillary ligands in the platinum(II) complexes of 1,3-bis(N-alkylbenzimidazol-2′-yl)benzene, [Pt(bzimb)(C≡C-R)], 1,3-bis-hetero-azolylbenzenes, [Pt(N DEGREESC DEGREESN)(C≡C-R)], and pyridine-based N-heterocyclic carbene, [Pt(NHC)(C≡C-R)] . It was found that the emission of the arylalkynylplatinum(II) complexes with pyridine-based N-heterocyclic carbene ligand was originated from the triplet alkynyl-to-tridentate pincer ligand-to-ligand charge transfer excited state mixed with platinum-to-tridentate pincer metal-to-ligand charge transfer character, and the excited state energy was found to be red-shifted according to the increasing π electron-donating ability of the aryl group attached to the alkynyl ligand. On the other hand, the emission energies of the platinum(II) complexes of 1,3-bis(N-alkylbenzimidazol-2′-yl)benzene and 1,3-bis-hetero-azolylbenzenes were found to be dependent on the different electron-donating substituents on the pincer ligands. Calculations have also been performed on the representative alkynylplatinum(II) + + complexes [Pt(trpy)(C≡C-R)] (trpy = 2,2′ 6′,2′′-terpyridine), [Pt(bzimpy)(C≡C-R)] (bzimpy = 2,6-bis(N-alkylbenzimidazol-2′-yl)pyridine) and [Pt(bzimb)(C≡C-R)] as well as alkynylgold(III) complexes [Au(C DEGREESN DEGREESC)(C≡C-R)] (C DEGREESN DEGREESC = 2,6-diphenylpyridine), [Au{C(Np) DEGREESN DEGREESC(Np)}(C≡C-R)] (C(Np) DEGREESN DEGREESC(Np) = 2,6-di(2-naphthyl)pyridine) and [Au(N DEGREESN DEGREESN)(C≡C-R)] (N DEGREESN DEGREESN = 2,6-bis(1H-benzimidazol-2-yl)pyridine) in order to have a better understanding on their nature of the emissive origins as well as the radiative and nonradiative processes. In particular, factors governing the ordering of the triplet excited states and radiative decay rate constants of the emissive state ( ES) have been examined. Their potential energy profiles for the deactivation process from the ES via triplet metal-centered states have also been explored. This study revealed for the first time the potential energy profiles for the thermal deactivation pathway of square planar platinum(II) and gold(III) complexes. In addition to the computational

Download or read book The Synthesis and Luminescence Properties of New Platinum and Iridium Complexes written by Mickaele Bonneau and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Luminescent Platinum II Complexes Containing Dianionic Tetradentate Ligands Having Mixed Oxygen Nitrogen and Carbon Donor Atoms and Platinum II containing Phosphorescent Polymers written by 唐煒燁 and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Synthesis of Luminescent Platinum II and Gold III Complexes with Tridentate Pincer type Ligands written by 林淑恒 and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Synthesis of Luminescent Homo And Heterometallic Complexes of Platinum ii written by 俞嘉麗 and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Design and Synthesis of Luminescent Homo- and Heterometallic Complexes of Platinum(II)" by 俞嘉麗, Ka-lai, Yu, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. DOI: 10.5353/th_b3123969 Subjects: Platinum compounds - Synthesis Electrochemistry

Download or read book Design and Synthesis of Luminescent Metal Polypyridyl Complexes of Platinum ii Ruthenium ii and Osmium ii for Chemosensing and Biological Studies written by Wing-Suen Tang and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Design and Synthesis of Luminescent Metal Polypyridyl Complexes of Platinum(II), Ruthenium(II) and Osmium(II) for Chemosensing and Biological Studies" by Wing-suen, Tang, 鄧詠璇, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled DESIGN AND SYNTHESIS OF LUMINESCENT METAL POLYPYRIDYL COMPLEXES OF PLATINUM(II), RUTHENIUM(II) AND OSMIUM(II) FOR CHEMOSENSING AND BIOLOGICAL STUDIES Submitted by TANG WING SUEN for the degree of Doctor of Philosophy at The University of Hong Kong in November 2006 A series of platinum(II) terpyridyl alkynyl complexes derivatized with basic amino functionalities and crown ether pendants, [Pt(trpy)(C≡C-R)]X (R = - - -C H -N(CH ) -4, X = OTf; R = -C H -N(CH CH OCH ) -4, X = OTf; R = 6 4 3 2 6 4 2 2 3 2 - - -C H -NH-4, X = OTf; R = -C H -N(CH )-4, X = Cl; R = 6 4 2 6 4 3 2 - - -C H -N(CH CH OCH ) -4, X = Cl; R = -C H -NH -4, X = Cl; R = -B15C5, X 6 4 2 2 3 2 6 4 2 - - = OTf; R = -A15C5, X = OTf ) have been synthesized. The X-ray crystal structure of [Pt(trpy){C≡CC H -N(CH CH OCH )-4}](OTf) has been 6 4 2 2 3 2 determined. The lowest energy absorption of the complexes except [Pt(trpy)(C≡CB15C5)](OTf) were tentatively assigned to originate from a π(C≡C) → π*(trpy) ligand-to-ligand charge transfer (LLCT) transition mixed with some metal-to-ligand charge transfer (MLCT) contribution. The ion-binding and pH dependent properties have also been studied. Their photophysical and spectroscopic properties were shown to be dependent on pH and selected metal ions, and their colorimetric and luminescence chemosensing properties were described. Another series of platinum(II) terpyridyl alkynyl complexes, t - [Pt( Bu trpy)(C≡C-R)]X [R = -C H -NH -4, X = OTf; R = -C H -NCS-4, X = 3 6 4 2 6 4 - - - OTf; R =-C H -NHCOCH I-4, X = OTf; R = -UH-5 (UH = Uracil), X = Cl; 6 4 2 -UMe-5, X = OTf (UMe = 1,3-dimethyluracil)] have been successfully synthesized and characterized. The X-ray crystal structures of t t [Pt( Bu trpy)(C≡C-C H-NCS-4)](OTf), [Pt( Bu trpy)(C≡C-UH-5)]Cl and 3 6 4 3 [Pt( Bu trpy)(C≡C-UMe-5)](OTf) have been determined. Their photophysical and electrochemical behaviour, together with their protein labeling and DNA binding studies, have also been studied. The emission of the complexes in solution at room temperature has been tentatively assigned as originated from a dπ(Pt) → π*( Bu trpy) triplet MLCT excited state. The 77 K butyronitrile glass displayed dual luminescence which were assigned to originate from an intraligand (IL) phosphorescence of the terpyridine ligand and a dπ(Pt) → t 3 t π*( Bu trpy) MLCT phosphorescence. The [Pt( Bu trpy)(C≡C- 3 3 C H-NHCSNH-4)](OTf)-HSA and [Pt( Bu trpy)(C≡C-C H -NHCOCH S- 6 4 3 6 4 2 4)](OTf)-HSA (HSA = human serum albumin) bioconjugates were highly colored and exhibited luminescence in the visible region upon photoexcitation. A series of ruthenium(II) diimine complexes and an osmium(II) diimine complex containing extended π-conjugated ligands, [Ru(bpy) (pmra)](PF ) 2 6 2 [pmra = N-(2-pyridylmethylene)-2-fluorenamine], [Ru(bpy) (pmra)]Cl, 2 2 [Ru(bpy) (pmaa)]Cl [pmaa = N-(2-pyridylmethylene)-2-anthramine], 2 2 [Ru(bpy) (pmpa)]Cl [pmpa = N-(2-pyridylmethylene)-1-pyrenamine], 2 2 [Ru(bpy) (pmfa)]Cl [pmfa = N-(2-pyridylmethylene)-3-fluoranthenamine] 2 2 and [Os(bpy) (pmaa)](PF ), have been synthesized. The lowest energy 2 6 2 absorption bands of the ruthenium(II) complexes w

Download or read book Luminescent Tetradentate Platinum II Complexes Bearing Asymmetric Ligands with Mixed Oxygen Nitrogen and Carbon Donor Atoms written by 高敏盈 and published by . This book was released on 2017 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book LUMINESCENT PALLADIUM II PL written by Pui-Keong Chow and published by Open Dissertation Press. This book was released on 2017-01-26 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Luminescent Palladium(II) and Platinum(II) Complexes With Tridentate Monoanionic and Tetradentate Dianionic Cyclometallated Ligands: Structures, Photophysical Properties and Material Application" by Pui-keong, Chow, 周沛強, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Four structural isomers of platinum(II) complexes with C-deprotonated R-C DEGREESN DEGREESN-R' cyclometallated ligands (R-C DEGREESN DEGREESN-R' = -extended 6-aryl-2,2'-bipyridine derivatives containing 2-naphthyl, 3-isoquinolinyl, 1-isoquinolinyl or 2-quinolinyl moieties) have been synthesized with their photophysical properties investigated. The one bearing a 3-isoquinolinyl moiety shows the highest emission quantum yield among the four and hence has been extensively modified to give a series of complexes with different ancillary ligands (chloride, iodide, phenoxide, or acetylide). Most of these complexes show vibronic emission (max = 515-644 nm) with high emission quantum yield (up to unity) in degassed CH2Cl2; one of them has been used for OLED fabrication and shows a maximum EQE of 8.15 % with current efficiency of 25 cd A-1. The photocatalytic properties of these derivative complexes for oxidative tertiary amine functionalization have also been examined. Several highly robust and emissive platinum(II) complexes supported by two types of tetradentate O DEGREESN DEGREESC DEGREESN ligand systems (Φem up to 0.99; Td up to 520 ℃) have been synthesized and show different emission energies (λmax = 482-561 nm). Most of them exhibit excimeric emission in solution state at room temperature which are dependent on the modifications on the tetradentate O DEGREESN DEGREESC DEGREESN ligands. DFT/TDDFT calculations reveal that the metal complex showing the most intense excimeric emission possesses an excimeric excited state with a localized structure, which is unusual for these classes of platinum(II) complexes. Based on this finding, WOLED (ηL(max) = 71.0 cd/A, ηp(max) = 55.8 lm/W, ηExt = 16.5 %, CIE = 0.33, 0.42, CRI = 77) and WPLED (ηL(max) = 17.0 cd/A, ηp(max) = 9.1 lm/W, ηExt = 9.7 %, CIE = 0.43, 0.45, CRI = 78) based on this complex have been fabricated with high efficiency achieved. Palladium(II) complexes containing C-deprotonated R-C DEGREESN DEGREESN-R' cyclometallated and pentafluorophenylacetylide ligands exhibit phosphorescence in both solid state and fluid solutions at room temperature with some of them exhibiting aggregation-induced emission (AIE). These complexes have been applied as photosensitizers in light-induced oxidative functionalization of secondary and tertiary benzylic amines as well as in light-induced hydrogen production, with a maximum of 175 turnovers for hydrogen produced. Palladium(II) complexes containing two types of tetradentate dianionic O DEGREESN DEGREESC DEGREESN ligand systems (Systems 1 and 2) have been prepared and show constrasting photophyical properties. A full scale time-resolved spectroscopic analysis has been done on some of these complexes and a platinum(II) analogue. These complexes are found to have similar excited state decay pathway( 〖S_1〗 DEGREESi→〖S_1〗 DEGREESf→T) with ΦISC of about unity. The emission efficiency of System 2 complexes is superior to that of System 1 complexes, which is ascribed to the suppression of excited state distortion on the basis of the results of DFT calculations. A lower radiative decay rate of System 2 palladium(II) complexes relative to the platinum(II) analogue has been found, which could be due to their lower spin-orbit coupling constant. One of the palladium(II) complexes ha

Download or read book Design and Synthesis of Ligands for Luminescent Metal Complexes written by Tyler Ian Davis and published by . This book was released on 2019 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: Luminescent metal complexes have been extensively investigated for a wide range of applications, including biological imaging and organic light emitting diodes (OLEDs). The ligand 2,6-bispyrazolepyridine (bppy) has shown itself to be an extremely effective sensitizer for Eu3+ complexes. Derivatives of this ligand have been synthesized with various oxygen containing groups attached at the 4 position of the pyrazoles. A novel diphosphine containing ligand with a terthiophene backbone has been synthesized. It is believed that this ligand could be used in Cu1+ complexes to create electropolymers capable of thermally activated delayed fluorescence (TADF)

Download or read book Iridium Complexes in Organic Synthesis written by Luis A. Oro and published by John Wiley & Sons. This book was released on 2008-12-03 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ranging from hydrogenation to hydroamination, cycloadditions and nanoparticles, this first handbook to comprehensively cover the topic of iridium in synthesis discusses the important advances in iridium-catalyzed reactions, namely the use of iridium complexes in enantioselective catalysis. A must for organic, complex and catalytic chemists, as well as those working with/on organometallics.

Download or read book Design and Synthesis of Luminescent Mono And Dinuclear Platinum ii Alkynyl Terpyridine Complexes written by Hoi-Yiu Chan and published by Open Dissertation Press. This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Design and Synthesis of Luminescent Mono- and Dinuclear Platinum(II) Alkynyl Terpyridine Complexes: From Photophysics to Aggregation and Self-assembly" by Hoi-yiu, Chan, 陳凱耀, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled DESIGN AND SYNTHESIS OF LUMINESCENT MONO- AND DINUCLEAR PLATINUM(II) ALKYNYL TERPYRIDINE COMPLEXES - FROM PHOTOPHYSICS TO AGGREGATION AND SELF-ASSEMBLY submitted by CHAN Hoi Yiu for the degree of Doctor of Philosophy at The University of Hong Kong in August 2006 A series of mononuclear alkynylplatinum(II) terpyridyl complexes, [Pt(trpy)({C{ C} C H )]PF, [Pt(trpy)({C{ C} C H CF -4)]PF, n 6 5 6 n 6 4 3 6 [Pt(trpy)({C{ C} C H CH -4)]PF, and [Pt( Bu trpy)(C{ C C{ C C H )]PF (n = n 6 4 3 6 3 6 5 6 2, 3), have been synthesized. The X-ray crystal structures of the two forms of [Pt(trpy)(C{ C C{ C C H )]PF, [Pt(trpy)(C{ C C{ C C{ C C H CH -4)]PF and 6 5 6 6 4 3 6 [Pt( Bu trpy)(C{ C C{ C C H )]PF have been determined. Dinuclear and 3 6 5 6 trinuclear alkynylplatinum(II) terpyridyl complexes, [1,4- {Pt(trpy)C{ C} C H ](OTf), [1,4-{Pt( Bu trpy)C{ C} C H ](OTf), [2,5- 2 6 4 2 3 2 6 4 2 {Pt(trpy)C{ C} C H S](OTf), [2,5-{Pt( Bu trpy)C{ C} C H S](OTf) and [1,3,5- 2 4 2 2 3 2 4 2 2 {Pt( Bu trpy)C{ C} C H ](OTf) have been successfully synthesized. The X-ray 3 3 6 3 3t crystal structure of [1,4-{Pt( Bu trpy)C{ C} C H ](OTf) has also been 3 2 6 4 2 determined. The luminescence properties of these complexes have been studied and their lowest-lying excited states in fluid solution and in the glass state were tentatively assigned as admixture of MLCT [dS (Pt)ĺ S *(trpy)] and LLCT [S (C{ C)ĺ S *(trpy)] origin, whereas the low-energy emissions in the solid state were attributed to triplet metal metal-to-ligand charge transfer ( MMLCT) phosphorescence, resulting from significant Pt---Pt interactions in the solid state. Besides, a series of luminescent platinum(II) terpyridyl alkynyl complexes with different counter anions, [Pt(trpy)(C{ C C{ C H)]X (X = OTf, PF, ClO, 6 4 BF, BPh ), [Pt(trpy)(C{ C C H )]X (X = OTf, PF, ClO, BF ) and 4 4 6 5 6 4 4 complexes with various substituents on the alkynyl and terpyridyl ligands, [Pt(trpy)(C{ CC H OCH-4)]OTf, [Pt(4'-CH O trpy)(C{ C C H )]OTf, 6 4 3 3 6 5 [Pt( Bu trpy)(C{ C C{ CH)]OTf, [Pt(trpy)(C{ CC H {CH NMe }-4)](OTf), 3 6 4 2 3 2 [Pt(trpy)(C{ C C{ C CH NMe )](OTf) and [Pt(trpy)(C{ C C{ C CH OH)]OTf 2 3 2 2 have been synthesized and their photophysical properties have been stuided. The X-ray crystal structure of [Pt(trpy)(C{ C C H )]ClO and 6 5 4 [Pt( Bu trpy)(C{ C C{ C H)]OTf have been determined. The solid-state absorption and emission spectra showed low-energy bands, which were assigned as derived from MMLCT origin. Solvent-induced aggregation studies of these complexes in solution showed that the color of the aggregates could be very different for different counter-ions, indicating that counter-ions played an important role in governing the degree of aggregation and the extent of interactions within these aggregates. Addition of various anions to solutions of [Pt(trpy)(C{ C C{ C H)]X (X = OTf, PF ) produced anion-induced color 6changes upon solvent-induced aggregation, showing that these complexes might serve as potential colorimetric anion probes. The effect of temperature on the aggregation properties of the complexes has also been explored. New low-energy absorption and emission bands were found upon a reduction of temperature, attributable to the formation o

Download or read book Design and Synthesis of Luminescent Homo and Heterometallic Complexes of Platinum II written by Ka-lai Yu and published by . This book was released on 1999 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Study of Luminescent Copper I Iridium III and Rhenium I Complexes with Different Types of Isocyanide Ligands written by Kin Cheung Chan and published by . This book was released on 2018 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Design and Synthesis of Luminescent Alkynylplatinum II Terpyridine Complexes and Their Function As Optical Probes for Biomolecules and Ions written by Ching-Lam Margaret Yeung and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Design and Synthesis of Luminescent Alkynylplatinum (II) Terpyridine Complexes and Their Function as Optical Probes for Biomolecules and Ions: From Self-aggregarion, Supramolecular Assembly to Host-guest Chemistry" by Ching-lam, Margaret, Yeung, 楊靖琳, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: A number of cationic water-soluble alkynylplatinum(II) terpyridine complexes, [Pt(tpy){C≡CCH2OC6H3-(CH2OH)2-3,5}]OTf, [Pt(tBu3tpy){C≡CCH2OC6H3- (CH2OH)2-3,5}]Cl, [Pt(tpy){C≡CCH2OC6H4-(CH2OH)-4}]OTf, [Pt(tpy){C≡CC6H3- (CH2OH)2-3,5}]OTf, [Pt(tpy){C≡CC6H4-(CH2OH)-4}]OTf, [Pt(tpy)(C≡C－C≡CH)]OTf and [Pt(tpy){C≡CC6H4(CH2NMe3)-4}](OTf)2, have been synthesized. Phosphate anion derivatives of polyanionic nature, e.g. adenosine triphosphate and tyrosine-containing phosphopeptide, were employed to investigate the induced supramolecular helical assembly behaviors of several of the water-soluble platinum(II) complexes through the study of their UV-vis absorption, emission and circular dichroism (CD) spectroscopies. The extent of such induced self-aggregation properties has been shown to be dependent on the concentration of substrates and capable of screening their respective structurally similar analogues. Two of the complexes were further explored for their use as label-free detection probes for real-time monitoring of the conversion of these phosphate anion derivatives to their metabolic products catalyzed by several biologically important enzymes. Michaelis-Menten analyses have been performed to determine the kinetic parameters. Supramolecular self-assembly and disassembly behaviors of water-soluble platinum(II) complexes have also been explored for their sensing applications for biomacromolecules with quantitative analyses based on UV-vis, emission and CD spectral titration studies. Making use of the selective binding affinity of aptamers towards their target substrates, the extent of self-assembly of the platinum(II) complexes in the presence of lysozyme and thrombin, which arose from their electrostatic interactions with the negatively charged aptamers, could be modulated for the quantification of these substrates. The potential applicability of this probing strategy in real biological environment has been assessed. Other than that, CD spectroscopic studies revealed the formation of supramolecular helical assembly of the platinum(II) complexes upon electrostatic interaction with heparin. Such helical conformation of the heparin-complex mixture together with the distribution of the negatively charged functionalities on the heparin have endowed the complex with high differentiating power for screening possible interfering analogues. Insulin has also been employed as a template for inducing the self-assembly of the platinum(II) complex. Changes in negative surface charge distribution on insulin, brought about by its conformational changes upon conversion to insulin amyloid under destabilizing conditions, have resulted in different extent of induced self-assembly of the metal complex. Spectral changes of the platinum(II) complex has provided a convenient monitoring of insulin amyloid formation, with kinetic parameters determined. A number of platinum(II) complexes with nucleobase-functionalized alkynyl ligands, [Pt(tpy)(C≡CCH2-T-1)]OTf, [Pt(tBu3tpy)(C≡CCH2T-1)]OTf, [Pt(tpy)(C≡C- CH2-A-9)]OTf, [Pt(tpy)(C≡CCH2-C-1)]OTf and [Pt(tpy)(C≡CCH2-G-9)]OTf (T = thymine; A = adenine; C = cytosine; and G = guanine), and amide-functionalized terpyridine ligands, [Pt{tpy-(CONHPh)2}(C≡CPh)]PF6 and [Pt{tpy-(CONHC6H13)