Download or read book Synthesis and Photosensitizing Properties of Sublimable Rhenium Diimine Complexes written by Hei-Ling Wong and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Photosensitizing Properties of Sublimable Rhenium Diimine Complexes written by Hei-ling Wong and published by . This book was released on 2007 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of Photosensitizing Properties in Some Rhenium Diimine Complex Containing Polymers written by Ching-Sum Hui and published by . This book was released on 2017-01-28 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Study of Photosensitizing Properties in Some Rhenium Diimine Complex Containing Polymers" by Ching-sum, Hui, 許正心, 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 "STUDY OF PHOTOSENSITIZING PROPERTIES IN SOME RHENIUM DIIMINE COMPLEX CONTAINING POLYMERS" Submitted by Hui Ching Sum for the degree of Master of Philosophy at The University of Hong Kong in July 2003 Polyurethanes incorporated with chlorotricarbonyl rhenium(I) 1,4-diaza-1,3-butadiene (DAB) complexes were synthesized and their photosensitizing properties were studied. The polymers exhibited low photoconductivity in spite of the high rhenium complex content. The rhenium complexes in the polymers can act as good photosensitizers but poor charge transport units. Therefore, electron-accepting dibutyl or dioctyl viologens were doped into the polymer matrix in order to enhance the photoconductivity. The polymers exhibited interesting solid state morphologies and solution properties. Gel permeation chromatography (GPC) and transmission electron microscopy (TEM) results suggested the formation of polymer aggregates in both solution and solid states. The polymers could act as probes for metal ions. The addition of metal ions to these polymer solutions led to significant changes in the electronic absorption properties. This was attributed to the interactions between the polyether moieties and metal ions. Chlorotricarbonyl rhenium bis(arylimino)acenaphthene (DIAN) complex containing poly(p-phenylenevinylene)s (PPV) were prepared by the palladium- catalyzed Heck coupling reaction using p-divinylbenzene and chlorotricarbonylrhenium(I) bis(4-iodophenylimino)acenaphthene as the monomers. It was found that the iodide generated in situ can displace the chloride ligand in the rhenium complex. Therefore, lithium chloride was added to suppress the halide exchange reaction. Photocurrent and photovoltaic measurements proved that the balance in the amount of rhenium complex and charge transport species in conjugated polymers was essential to the photosensitization process. In the photovoltaic devices fabricated, poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT: PSS) and 3,4,9,10-perylenetetracarboxylic diimide (PTCDI) were used as the hole and electron transport layers, respectively. It was -2 found that the best device exhibited a power conversion efficiency up to 6.1 10 %. Titanium dioxide (TiO ) was doped into the PPV with the highest rhenium content for further improvement of photovoltaic properties. In addition, the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) levels of the polymers were estimated by cyclic voltammetry. The halide exchange process was examined by synthesizing a series of model compounds. The axial chloride ligand was displaced by bromide or iodide ligands during the course of the Heck coupling reaction. In the model reactions, tetrabutylammonium halide (nBu NI or nBu NBr) acted as the source of halide in 4 4 replacing the axial chloride ligand in [Re(CO) Cl(DIAN)]. The addition of lithium chloride suppressed the halide exchange. Large amounts of nBu NI and long reaction times drove the ligand exchange process to the product side. The axial halide ligand exerted a significant effect on the solvatochromism and redox behavior, which resulted from the change in the lowest excited states from metal-to-ligand charge transfer (MLCT) to ligand-to-ligand charge transfer (LLCT) character when the axial chloride ligand was replaced by io
Download or read book Study of Photosensitizing Properties in Some Rhenium Diimine Complex Containing Polymers written by Ching-sum Hui and published by . This book was released on 2003 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Photoconducting Properties of Molecular and Polymeric Rhenium Diimine Complexes written by 林思敏 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, "Synthesis and Photoconducting Properties of Molecular and Polymeric Rhenium Diimine Complexes" by 林思敏, Sze-man, Lillian, Lam, 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_b3124324 Subjects: Rhenium compounds Photoconductivity
Download or read book Synthesis and Photoconducting Properties of Molecular and Polymeric Rhenium Diimine Complexes written by Sze-man Lam (Lillian) and published by . This book was released on 2002 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Fluorescence and in Vitro Cytotoxicity Studies of Some Rhenium I Diimine Complexes written by David H. Orsa and published by . This book was released on 2010 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cancer is the leading cause of death in the world. There are conventional methods for cancer treatment, but each has its limitations or drawbacks. These circumstances have led researchers to look for new cytotoxic agents which could be used for cancer treatment. Here, convenient one-pot synthesis of several photoluminescent rhenium(I) diimine complexes and their screening for anticancer properties are presented. The rhenium(I) complexes include fac-(CO)3(Bipy)ReCl (1), fac-(CO)3(Phen)ReCl (2), fac-(CO) 3(2,9-Me2Phen)ReCl (3), fac-(CO) 3(2,9-Me2-4,7-Ph2Phen)ReCl (4), (CO) 3(Quinox)Re(mu-OC5H11)2Re(CO) 3-(Quinox) (5), [(CO)3Re(mu-OC5H 11)2Re(CO)3]2(mu-Pyrazine)2 (6), [(CO)3Re(mu-OC5H11) 2Re(CO)3]2(mu-4,4'-Bipy)2 ( 7), and [(CO)3(2,9-Me2Phen)Re(mu-H)Re(2,9- Me2Phen)(CO)3]+[(CO)3Re (mu-OC 5H11)3Re(CO)3]- ( 8). The complexes have been characterized using spectroscopic techniques and the molecular structures of 3-8 have been confirmed through X-ray crystal structure determinations. As expected, these complexes exhibit fluorescence. The anticancer properties of 1-8 are evaluated using the human prostate cancer cell line (PC-3) and breast cancer cell line (MCF-7A). The results of this study demonstrate that these complexes have significant anticancer properties. For example, the complex 6 is highly effective against MCF-7A and the complex 1 is highly effective against PC-3. Therefore, these complexes can potentially find applications in the treatment of some cancers.-- Abstract.
Download or read book The Synthesis Characterization and Photophysical Properties of Octahedral Rhenium I Tricarbonyl Complexes Containing 2 2 pyridyl pryimidine and Its Analogs written by Peter Orizondo and published by . This book was released on 1996 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis Characterization Electrochemistry and Photophysical Studies of Rhenium I Tricarbonyl Diimine Complexes with Carboxaldehyde Alkynyl Ligands written by 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 Photochemistry and Photophysics of Coordination Compounds II written by Vincenzo Balzani and published by Springer. This book was released on 2007-08-07 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photochemistry (a term that broadly speaking includes photophysics) is abranchofmodernsciencethatdealswiththeinteractionoflightwithmatter and lies at the crossroadsof chemistry, physics, and biology. However, before being a branch of modern science, photochemistry was (and still is today), an extremely important natural phenomenon. When God said: “Let there be light”, photochemistry began to operate, helping God to create the world as wenowknowit.Itislikelythatphotochemistrywasthesparkfortheoriginof life on Earth and played a fundamental role in the evolution of life. Through the photosynthetic process that takes place in green plants, photochemistry is responsible for the maintenance of all living organisms. In the geological past photochemistry caused the accumulation of the deposits of coal, oil, and naturalgasthat wenowuseasfuels.Photochemistryisinvolved inthecontrol ofozoneinthestratosphereandinagreatnumber ofenvironmentalprocesses thatoccurintheatmosphere,inthesea,andonthesoil.Photochemistryisthe essenceoftheprocessofvisionandcausesavarietyofbehavioralresponsesin living organisms. Photochemistry as a science is quite young; we only need to go back less than one century to ?nd its early pioneer [1]. The concept of coordination compound is also relatively young; it was established in 1892, when Alfred Werner conceived his theory of metal complexes [2]. Since then, the terms coordination compound and metal complex have been used as synonyms, even if in the last 30 years, coordination chemistry has extended its scope to the binding ofall kinds of substrates [3, 4].
Download or read book Chromic Phenomena 3rd Edition written by Peter Bamfield and published by Royal Society of Chemistry. This book was released on 2018-08-24 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chromic or colour related phenomena are produced in response to a chemical or physical stimulus. This new edition will update the information on all those areas where chemicals or materials interact with light to produce colour, a colour change, or luminescence especially in the imaging, analysis, lighting and display areas. The book has been restructured to show greater emphasis on applications where 'coloured' compounds are used to transfer energy or manipulate light in some way therefore reducing the details on classical dyes and pigments. In the past eight years, since the previous edition, there has been a remarkable increase in the number of papers and reviews being produced reflecting the growth of interest in this area. This ongoing research interest is matched by a large number of new technological applications gaining commercial value covering e.g. biomedical areas, energy, data storage, physical colour, bio-inspired materials and photonics. This book appeals to industrial chemists, professionals, postgraduates and as high level recommended reading for colour technology courses.
Download or read book Inorganic Syntheses written by John P. Fackler and published by Wiley. This book was released on 1982-09-10 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The volumes in this continuing series provide a compilation of current techniques and ideas in inorganic synthetic chemistry. Includes inorganic polymer syntheses and preparation of important inorganic solids, syntheses used in the development of pharmacologically active inorganic compounds, small-molecule coordination complexes, and related compounds. Also contains valuable information on transition organometallic compounds including species with metal-metal cluster molecules. All syntheses presented here have been tested.
Download or read book Late Transition Metal Polymerization Catalysis written by Bernhard Rieger and published by John Wiley & Sons. This book was released on 2006-03-06 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: At the start of the 1950s, Ziegler and Natta discovered that simple metallorganic catalysts are capable of transforming olefins into linear polymers with highly ordered structures. This pioneering discovery was recognized with a Nobel Prize in 1963. In the 80s and 90s, the development of molecular defined metallocenes led to a renaissance for non-polar polyolefin materials. Designer catalysts allowed a greater precision in defining properties of the material. The past 10 years have seen the discovery of new catalysts based on late transition metals, which allow the combination of polar monomers with non-polar olefins and thus lead to innovative materials. Here, the world's leading authors from industry and academia describe the latest developments in this fascinating field for the first time in such comprehensive detail. In so doing, they introduce readers systematically to the basic principles and show how these new catalysts can effectively be used for polymerization reactions. This makes the book an ideal and indispensable reference for specialists, advanced students, and scientists of various disciplines dealing with research into catalysts and materials science.
Download or read book Nanoscale Phenomena written by Zikang Tang and published by Springer Science & Business Media. This book was released on 2007-11-22 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book collects selected lectures from the Third Workshop of the Croucher Advanced Study Institute on Nano Science and Technology, and showcases contributions from world-renowned researchers. The book presents in-depth articles on the latest developments in nanomaterials and nanotechnology, and provides a cross-disciplinary perspective covering physics and biophysics, chemistry, materials science, and engineering.
Download or read book Inorganic Syntheses Reagents for Transition Metal Complex and Organometallic Syntheses written by Robert J. Angelici and published by Wiley-Interscience. This book was released on 1990-12-13 with total page 463 pages. Available in PDF, EPUB and Kindle. Book excerpt: The volumes in this continuing series provide a compilation of current techniques and ideas in inorganic synthetic chemistry. Includes inorganic polymer syntheses and preparation of important inorganic solids, syntheses used in the development of pharmacologically active inorganic compounds, small-molecule coordination complexes, and related compounds. Also contains valuable information on transition organometallic compounds including species with metal-metal cluster molecules. All syntheses presented here have been tested.
Download or read book Inorganic Syntheses written by and published by John Wiley & Sons. This book was released on 2009-09-22 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt: The volumes in this continuing series provide a compilation of current techniques and ideas in inorganic synthetic chemistry. Includes inorganic polymer syntheses and preparation of important inorganic solids, syntheses used in the development of pharmacologically active inorganic compounds, small-molecule coordination complexes, and related compounds. Also contains valuable information on transition organometallic compounds including species with metal-metal cluster molecules. All syntheses presented here have been tested.
