Download or read book Design Synthesis and Functionalization of Luminescent Alkynyl Compounds of Boron III and Gold III with Bidentate and Tetradentate Ligands written by 黃耀榮 and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book DESIGN SYNTHESIS FUNCTIONALI written by Yiu-Yan Tam and published by Open Dissertation Press. This book was released on 2017-01-24 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Design, Synthesis and Functionalization of Luminescent Alkynylplatinum(II) Complexes of Tridentate N-donor Ligands as Building Blocks for Metallogelation and Supramolecular Assembly" by Yiu-yan, Tam, 譚耀欣, 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_b4322384 Subjects: Complex compounds - Synthesis Platinum compounds - Synthesis Photochemistry Ligands Colloids
Download or read book Design Synthesis and Functionalization of Stimuli responsive Luminescent Gold i Alkynyl Chalcogenido and Phosphinidene Complexes written by 朱劼怡 and published by . This book was released on 2019 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Synthesis and Functionalization of Luminescent Alkynylplatinum ii Complexes of Tridentate N Donor Ligands As Building Blocks for Metallofoldamers Supramolecular Assemblies and Nanostructures written by Yu-Lut Leung and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book DESIGN SYNTHESIS FUNCTIONALI written by Yau-Hin Hong and published by Open Dissertation Press. This book was released on 2017-01-26 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Design, Synthesis and Functionalization of Luminescent Alkynylgold(I) Complexes With [pi]-conjugated Ligands: From Photophysics to Supramolecular Assembly" by Yau-hin, Hong, 康祐軒, 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 the thesis entitled DESIGN, SYNTHESIS AND FUNCTIONALIZATION OF LUMINESCENT ALKYNYLGOLD(I) COMPLEXES WITH π-CONJUGATED LIGANDS FROM PHOTOPHYSICS TO SUPRAMOLECULAR ASSEMBLY Submitted by HONG Yau Hin for the Degree of Doctor of Philosophy at The University of Hong Kong in July 2015 A library of polynuclear thiophene-based alkynylgold(I) complexes with N-heterocyclic carbenes (NHCs) and triphenylphosphine as the peripheral ligands, [R{(C≡C)Au(NHC)} ] (R = benzo[1,2-b:4,5-b']dithiophene, n = 2, 4; benzo[1,2- b:3,4-b':5,6-b'']trithiophene, n = 3; dithieno[3,2-b:2',3'-d]thiophene, n = 2; dithieno[3,2-e:2',3'-g](dibenzo[b, d]-thiophene), n = 2; 4-hexyl-4H-dithieno[3,2- b:2',3'-d]pyrrole, n = 4) and [R'{(C≡C)Au(PPh )}] (R' = benzo[1,2-b:4,5- 3 2 b']dithiophene), has been synthesized and characterized. The X-ray crystal structure of [BDT{(C≡C)Au(IHex)} -2,6] (BDT = benzo[1,2-b:4,5-b']dithiophene, IHex = 1,3-dihexylimidazol-2-ylidene) has been determined by X-ray crystallography. This class of complexes showed dual emissive behaviour and exhibited broad vibronic-structured emission bands in degassed dichloromethane solution at ambient temperature. As demonstrated by the temperature-dependent UV-vis absorption spectroscopy, some of the alkynylgold(I) complexes were shown to self-assemble in THFwater mixtures through a cooperative growth mechanism. Variation of the alkyl chain length on the NHC ligands not only has a significant effect on the morphologies of the aggregates, but also on the thermodynamic parameters of the self-assembly processes as revealed by the nucleationelongation model. Apart from the thiophene-based sulfur heterocycle-containing alkynylgold(I) system, a series of N-alkyl substituted triindole-based nitrogen heterocycle-containing trinuclear alkynylgold(I) complexes with isocyanide and NHCs as the peripheral ligands, [(TATI){(C≡C)Au(C≡N-R)}] (TATI = trialkyltriindole; R = 2,6-dimethoxyphenyl, 2,6-dimethylphenyl), and [(TATI){(C≡C)Au(NHC)}], has been prepared and characterized. The photophysical properties of the trinuclear alkynylgold(I) complexes have been examined. Their self-assembly properties have also been explored using TEM, SEM, DLS, H NMR spectroscopy, solvent-dependent and variable-temperature UV-vis absorption experiments. Some of the complexes have been demonstrated to possess spherical nanostructures in their THFwater dispersions. The self-assembly was believed to be mediated by the ππ stacking interactions of the central triindole moiety and governed by a cooperative growth mechanism. In addition, a novel class of amphiphilic phosphole-based phosphorus heterocycle-containing alkynylgold(I) complexes, [Au(C≡C-R){Ph-DBP(O)- ] O(CH ) SO }]K (DBP = 5H-dibenzophosphole; R = phenyl, naphthyl, 2 3 3 phenanthrenyl, pyrenyl, perylenyl, 4-methoxyphenyl, 4-chlorophenyl) was designed and synthesized. The photophysical properties of this class of complexes have been studied. Some of the complexes were shown to display sheet-like nanostructures in aqueous DMSO solution. The self-assembly process was found to be governed by an isodesmic mechanism and mediated by hydrophobichydrophobic interactions between the alkynyl units. It has been shown that modulation of t
Download or read book Luminescent Cyclometalated Gold III Complexes with Ancillary N Heterocyclic Carbene and Alkynyl Ligands written by Ka-Man Au 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, "Luminescent Cyclometalated Gold (III) Complexes With Ancillary N-heterocyclic Carbene and Alkynyl Ligands: From Design, Synthesis, Photophysics to Supramolecular Assembly and Functions" by Ka-man, Au, 區嘉雯, 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 library of luminescent cyclometalated gold(III) complexes containing various bis-cyclometalating R-C DEGREESN DEGREESC ligands derived from 2,6-diphenylpyridine and ancillary alkynyl ligands, [Au(R-C DEGREESN DEGREESC)(C≡CR')], has been synthesized. Some of the complexes have been structurally determined by X-ray crystallography. These complexes were found to exhibit intense emission in dichloromethane solution at 298 K, originating from metal-perturbed triplet intraligand (IL) excited states of the R-C DEGREESN DEGREESC ligand, with substantial charge transfer character from the aryl moiety to the pyridyl ring. In the presence of electron-rich alkynyl ligands, the emission origin could be switched to an alkynyl-to-cyclometalating ligand ligand-to-ligand charge transfer (LLCT) excited state. This class of complexes was also demonstrated to show rich electroluminescence properties as emitters in organic light-emitting devices. In addition, the supramolecular assembly of this class of complexes has also been revealed in gelation studies. N-Heterocyclic carbenes have been incorporated into the gold(III) metal center to prepare a series of luminescent mononuclear and dinuclear gold(III) complexes, [{Au(C DEGREESN DEGREESC)}n(NHC)](PF6)n and [{Au(tBuC DEGREESN DEGREESCtBu)}n(NHC)]- (PF6)n (n = 1, 2). The X-ray crystal structures of most of the complexes have been determined. The emissions of these complexes were assigned to originate from the metal-perturbed intraligand excited state of the bis-cyclometalating ligand. One of the C2-bridged dinuclear complexes was found to exhibit two distinct reduction couples, tentatively correlated to the presence of significant intramolecular π-π interaction in the complex. Two novel series of luminescent mononuclear alkynylgold(III) complexes, [Au(C DEGREESN)(C≡CR)2] (HC DEGREESN = 2-phenylpyridine (Hppy) and derivatives) and [Au(C DEGREESN DEGREESN)(C≡CR)]PF6 (HC DEGREESN DEGREESN = 6-phenyl-2,2'-bipyridine and derivatives), have been synthesized. Some of the X-ray crystal structures have been determined. The former class of complexes with bidentate C DEGREESN ligands has been observed to show tunable emission spanning across the visible spectrum from 462 to 697 nm. With the exception of [Au(ppy)(C≡C-C6H4-NH2-p)2] which showed a low-energy band originated from a 3LLCT [π(C≡C-C6H4-NH2)→π*(C DEGREESN)] excited state, all complexes exhibited vibronic-structured emission bands originated from the intraligand transition of the cyclometalating C DEGREESN ligand in dichloromethane solution at 298 K. On the other hand, most of the complexes with the tridentate C DEGREESN DEGREESN-type ligand have been observed to exhibit vibronic-structured emission bands attributed to the intraligand transition of the C DEGREESN DEGREESN ligand in low-temperature butyronitrile glass. DOI: 10.5353/th_b4775268 Subjects: Organogold compounds - Synthesis Carbenes (Methylene compounds) Heterocyclic compo
Download or read book Design Synthesis and Functionalization of Luminescent Alkynylgold i Complexes with Pi Conjugated Ligands written by YAU-HIN. HONG and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Synthesis and Functionalization of Luminescent Alkynylplatinum II Complexes of Tridentate N donor Ligands as Building Blocks for Metallofoldamers Supramolecular Assemblies and Nanostructures written by 梁宇律 and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Synthesis and Functionalization of Luminescent Alkynylplatinum II Complexes of Tridentate N donor Ligands as Building Blocks for Metallogelation and Supramolecular Assembly written by Yiu-yan Tam and published by . This book was released on 2009 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design Synthesis and Functionalization of Luminescent Alkynylgold I Complexes with pi conjugated Ligands written by 康祐軒 and published by . This book was released on 2015 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Luminescent Cyclometalated Gold III Complexes with Ancillary N heterocyclic Carbene and Alkynyl Ligands written by Ka-man Au and published by . This book was released on 2012 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Novel Luminescent Cyclometalated Gold III Alkynyls written by Ling-Ling Hung 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, "Novel Luminescent Cyclometalated Gold (III) Alkynyls: Design, Synthesis, Photophysics and Their Multinuclear Assemblies" by Ling-ling, Hung, 熊靈玲, 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 NOVEL LUMINESCENT CYCLOMETALATED GOLD(III) ALKYNYLS - DESIGN, SYNTHESIS, PHOTOPHYSICS AND THEIR MULTINUCLEAR ASSEMBLIES Submitted by HUNG Ling Ling for the Degree of Doctor of Philosophy at The University of Hong Kong in November 2007 A new class of luminescent mononuclear cyclometalated gold(III) complexes containing various monoynyl ligands, [Au(RC DEGREESN(R′) DEGREESCR)(C≡CR′′)], i.e. [Au(C DEGREESN DEGREESC)(C≡CR′′)] (HC DEGREESN DEGREESCH = 2,6-diphenylpyridine; R′′ = C H, C H-Cl-p, 6 5 6 4 C H-C H -p, C H-OCH -p, C H-NO -p, C H-NH -p, C H-N(CH ) -p, 6 4 6 13 6 4 3 6 4 2 6 4 2 6 4 3 2 t t t t C H-N(C H ) -p, C H ), [Au( BuC DEGREESN DEGREESC Bu)(C≡CR′′)] (H BuC DEGREESN DEGREESCBuH = 2,6- 6 4 6 5 2 6 13 bis(4-tert-butylphenyl)pyridine; R′′ = C H, C H-NH -p, Si(CH ), H), 6 5 6 4 2 3 3 [Au(FC DEGREESN DEGREESCF)(C≡CR′′)] (HFC DEGREESN DEGREESCFH = 2,6-bis(4-fluorophenyl)pyridine; R′′ = C H, 6 5 C H-NH -p) and [Au(C DEGREESNTol DEGREESC)(C≡CC H-C H -p)] (HC DEGREESNTol DEGREESCH = 2,6- 6 4 2 6 4 6 13 diphenyl-4-p-tolylpyridine) have been synthesized. Most of the complexes have been structurally determined by X-ray crystallography which revealed the presence of intermolecular π-π stacking interaction with interplanar separations between [Au(RC DEGREESN(R′) DEGREESCR)] units of ca. 3.343-3.570 A. The lowest-lying excited states of 3 these complexes in dichloromethane were assigned as the metal-perturbed IL [π → π*(RC DEGREESN(R′) DEGREESCR)] origin, with substantial charge transfer character from the aryl ring to the pyridyl unit, whereas a switch in the lowest-lying excited states origin to LLCT [π(C≡CC H NR′′′ ) → π*(RC DEGREESN(R′) DEGREESCR)] was observed in complexes 6 4 2 containing aminophenyl alkynyl ligands. The low-energy emissions in the solid state were attributed to the π-π excimeric intraligand phosphorescence, arising from the intermolecular π-π stacking interactions of the RC DEGREESN(R′) DEGREESCR ligands in the solid state as revealed from the crystal packing diagrams. A series of luminescent mononuclear cyclometalated gold(III) complexes with various oligoynyl ligands, [Au(RC DEGREESN DEGREESCR)(C≡CR′)] (R = H, R′ = C≡CH, C H-C≡CH, C≡CC H, C≡CC H-CH -p, C≡CC H-CF -p, C≡CC H-NH -p, 6 4 6 5 6 4 3 6 4 3 6 4 2 C≡C-C≡CC H; R = Bu, R′ = C≡CH, C H-C≡CH) have also been synthesized. 6 5 6 4 The di- and trinuclear cyclometalated gold(III) alkynyl complexes, [1,4- t t t t {Au( BuC DEGREESN DEGREESC Bu)C≡C} C H ] and [1,3,5-{Au( BuC DEGREESN DEGREESC Bu)C≡C} C H ], have also 2 6 4 3 6 3 been prepared. The X-ray crystal structures of [Au(RC DEGREESN DEGREESCR)(C≡CR′)] (R = H, R′ = C≡CH, C H-C≡CH, C≡CC H-CH -p, C≡CC H-CF -p; R = Bu, R′ = 6 4 6 4 3 6 4 3 t t C H-C≡CH) and [1,3,5-{Au( BuC DEGREESN DEGREESC Bu)C≡C} C H ] have been determined. The 6 4 3 6 3 t t molecular structure of [1,3,5-{Au( BuC DEGREESN DEGREESC Bu)C≡C} C H ] showed the twisting of 3 6 3 t t the three coordination planes, [Au( BuC DEGREESN DEGREESCBu)], relative to the central phenyl ring with dihedral angles of 6.1, 48.4 and 60.7. Similarly, the emissions of most of the complexes in fluid solution were attributed to the metal-perturbed IL [π → π*(RC DEGREESN DEGREESCR)] phosphorescence with substantial charge transfer character from the aryl group to the pyridyl unit, while the emission origin was assigned as derived 3 f
Download or read book Design Synthesis and Characterization of Luminescent Dinuclear and Polynuclear Complexes of Gold I and Platinum II with Alkynylcalix 4 arene and Bridging Sulfido Ligands written by 侯嘉華 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 Synthesis Characterization and Luminescence Properties of Alkynylgold i Complexes written by Sung-Kong Yip 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, "Design, Synthesis, Characterization and Luminescence Properties of Alkynylgold(I) Complexes: Strategies Towards Supramolecular Architectures and Host Guest Chemistry" by Sung-kong, Yip, 葉崇江, 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, SYNTHESIS, CHARACTERIZATION AND LUMINESCENCE PROPERTIES OF ALKYNYLGOLD(I) COMPLEXES STRATEGIES TOWARDS SUPRAMOLECULAR ARCHITECTURES AND HOST GUEST CHEMISTRY Submitted by YIP Sung Kong for the degree of Doctor of Philosophy at The University of Hong Kong in July 2005 A series of luminescent dialkynylaurate(I) complexes, [X][Au(C CR) ] [X = Bu N, R = C H OMe-p, C H OHex-p, C H Oct-p, C H Cl-p, C H CF -p, 1-naphthyl 4 6 4 6 4 6 4 6 4 6 4 3 (Np), 9-anthracenyl (An), 1-pyrenyl (Pyr); X = PPN, R = Pyr] have been synthesized. The X-ray crystal structures of [BuN][Au(CCCHOMe-p)] and 4 64 2 [BuN][Au(CCCHCF-p)] showed the presence of intermolecular hydrogen 4 64 3 2 bonds with bonding distances of ca. 2.599 - 2.620 A. The related pentanuclear gold(I)-copper(I) and -silver(I) mixed-metal alkynyl complexes, [BuN][AuM(CCCH-R-p) ] [M = Cu, R = OMe, OBu, OHex, Et; M = Ag, R = Et, 4 32 64 6 OHex] have been synthesized. The emission origin was tentatively assigned as derived from triplet states of metalloligand-to-metal cluster core charge transfer [Au(C CR) M Au ] (M = Cu, Ag) origin, probably mixed with some metal- 2 2 3 perturbed intraligand *(C C) character. Through the utilization of alkynylcalix[4]crown as ligands, dinuclear gold(I) 1 2 3 alkynylcalix[4]crown-5 complexes, [(R P)Au] L [R = Tol-o, L = L; R = Ph, L = L, L ], 3 2 4 5 6 1 tetranuclear gold(I) alkynylcalix[4]crown assemblies, [Au (L') ] [L' = L, L, L, L ] and 4 2 a mixed-metal gold(I)-copper(I) alkynylcalix[4]crown complex, [Au Cu (L ) ] have 2 2 2 been synthesized. The X-ray crystal structures of all the dinuclear gold(I) complexes, 4 1 4 [Au (L') ] [L' = L, L ] and [Au Cu (L ) ] have been determined. The X-ray crystal 4 2 2 2 2 structures of [Au(L')] showed that two of the gold(I) centers were each 4 2 -coordinated to two alkynyl units, while the other two were each -coordinated by 2 2 the two alkynyl units in an unusual planar, -coordination mode, which was the first of its kind for gold(I) complexes. The Au Au distances between adjacent gold atoms were in the range of 3.1164(11) 3.2118(10) A, indicative of the presence of significant Au Au interactions. The emissive origin of [Au (L') ] was assigned as 4 2 derived from a triplet state of a metal cluster-centered ds/dp character, probably with some mixing of a metal-perturbed intraligand character, while the emission of [Au Cu (L ) ] was assigned to have similar character, but with modification by 2 2 2 Au Cu interactions. The binding properties of the dinuclear gold(I) complexes toward alkali metal ions have been studied. Dinuclear gold(I) complexes, [{Ph PN(R)PPh }Au (C CR') ] [R = Pr, R' = Ph, 2 2 2 2 C H OMe-p, C H Me-p, C H Cl-p; R = C H OMe-p, R' = Ph], have been synthesized 6 4 6 4 6 4 6 4 by deploymerization of alkynylgold polymers using bis(diphenylphosphino)amines as ligands. The X-ray crystal structures of [{PhPN(Pr)PPh}Au(C CPh)] and 2 2 2 2 [{PhPN(Pr)PPh}Au(C CCHOMe-p)]] revealed the presence of short 2 2 2 6 4 2 intramolecular Au Au contacts with the Au Au distances of 2.8404(8) and 3.0708(7) A, respectively. The photophysical properties of the complexes have been studied and their emission orig
Download or read book Design Synthesis and Functionalization of Alkynylplatinum II Complexes with Tridentate N donor Ligands written by 房詩詩 and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Luminescent Gold III Complexes written by Amanda N. Sulicz and published by . This book was released on 2017 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemistry of cyclometalated gold(III) has been relatively slow to emerge, but recent advances in catalyst and material design have driven a renewed interest. Reported here are synthetic, structural, and optical studies of cyclometalated gold(III) aryl complexes. These new complexes show ligand-centered luminescence that is perturbed by the heavy-atom effect of gold. Traditionally, metal-carbon bond formation relied on organometallic complexes of electropositive elements, including lithium and magnesium. The easily reducible nature of gold(III) often interferes with these conventional reagents, thus resulting in the use of toxic metals like mercury or thallium. Reported here is the use of palladium-catalyzed Suzuki-Miyaura cross-coupling for the attachment of aryl ligands to cyclometalated gold(III) chloride complexes. The resulting di- and mono-arylated species were luminescent. Several complexes have been crystallographically characterized. Luminescent derivatives of a previously published gold(III) chloro precursor, initially reported for catalytic purposes, were prepared through boron transmetalation reactions. Complexes bearing both aryl and cyanide ligands were synthesized. These luminescent materials are diamagnetic and were be characterized by multinuclear NMR, absorption and emission spectroscopies (including time-resolved emission), and by X-ray diffraction crystallography. The synthesized gold(I) complexes were designed to display reverse saturable absorption and be a two photon acceptor. The BTF (BTF = 2-(9,9’-diethyl-9H-fluoren-2-yl)-benzothiazole) ligand was chosen as it has been previously demonstrated to have favorable photophysical effects on platinum(II) and ruthenium(II) complexes for applications in photodynamic therapy and optical power limiting (OPL). Gold(I) complexes with the BTF ligand are sought for potential OPL applications. Synthesized complexes are luminescent and were characterized by multinuclear NMR, absorption and emission spectroscopies, photoluminescent quantum yields, time-resolved emission. Two complexes were crystallographically characterized.
