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Photosensitizing Compounds

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Photosensitizing Compounds

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Author : Gregory R. Bock
language : en
Publisher: John Wiley & Sons
Release Date : 2008-04-30

Photosensitizing Compounds written by Gregory R. Bock and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-04-30 with Science categories.

Certain organic compounds can become toxic to biological tissue when activated by light. Many medical applications of this effect have been studied over the past twenty years, and This symposium brings together chemists, biologists, and clinicians to discuss the basic chemistry of the sensitizing compounds, their biological effects, and clinical applications in treatments of various cancers and skin disorders.

Characterisation Of Two Photosensitizing Compounds From Typhonium Flagelliforme Schott And Their Mode Of Action In Inducing Cancer Cell Death

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Author : Anthony Siong Hock Ho
language : en
Publisher:
Release Date : 2002

Characterisation Of Two Photosensitizing Compounds From Typhonium Flagelliforme Schott And Their Mode Of Action In Inducing Cancer Cell Death written by Anthony Siong Hock Ho and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Antineoplastic agents categories.

Photosensitizers In Medicine Environment And Security

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Author : Tebello Nyokong
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-01-02

Photosensitizers In Medicine Environment And Security written by Tebello Nyokong and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-01-02 with Science categories.

This book addresses the synthesis of photosensitizers, the main emphasis being on the new methods of synthesis such as microwave, sonochemistry and the use of ionic liquids. It also addresses the photochemistry and photophysics of the photosensitizers alone and in combination with nanoparticles, the use of the photosensitizers in environmental control, safety and medicine. It discusses the common structures of the photosensitizers which are beneficial to these applications.

Synthesis And Photosensitizing Properties Of Sublimable Rhenium Diimine Complexes

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Author : Hei-Ling Wong
language : en
Publisher: Open Dissertation Press
Release Date : 2017-01-27

Synthesis And Photosensitizing Properties Of Sublimable Rhenium Diimine Complexes written by Hei-Ling Wong and has been published by Open Dissertation Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-01-27 with categories.

This dissertation, "Synthesis and Photosensitizing Properties of Sublimable Rhenium Diimine Complexes" by Hei-ling, Wong, 黃喜玲, 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 SYNTHESIS AND PHOTOSENSITIZING PROPERTIES OF SUBLIMABLE RHENIUM DIIMINE COMPLEXES Submitted by Wong Hei Ling for the degree of Doctor of Philosophy at The University of Hong Kong in January 2007 Two series of rhenium diimine complexes based on bis(phenylimino)acenaphthene-derived and benzothiazole-derived ligands were synthesized and their uses in fabricating highly efficient photovoltaic devices are presented. The electronic absorption bands, highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels of these rhenium complexes could be modified easily by changing the structure of ligands. These rhenium complexes were used as the photosensitizers in photovoltaic cells. A series of multilayer bulk heterojunction photovoltaic devices with the device structure ITO/CuPc/Complex: C /C /Al (ITO = indium tin oxide coated glass, 60 60 and CuPc = copper phthalocyanine) based on different rhenium complex photosensitizers co-deposited with C in the active layer was fabricated. ITO 60 serves as the anode and Al as the cathode. CuPc and C were used as the hole and 60 electron transport materials, respectively. The complexes are thermally stable and can be processed by thermal evaporation under high vacuum. Multilayer thin films with very good optical quality and smooth surface morphology were prepared. The effects of varying the hole transport material, thickness of hole transport material, rhenium complex photosensitizer, mixed layer thickness, active layer composition, and light intensity to the performance of the photovoltaic cells were studied systematically. It was found that the short-circuit current (I ) and SC fill-factor (FF) could be significantly affected by varying the device configuration. However no significant change in the open-circuit voltage (V ) was observed., OC For the devices fabricated from rhenium diimine complexes based on bis(phenylimino)acenaphthene-derived ligands, it was found that the highest power conversion efficiency (η ) was achieved for the bulk heterojunction photovoltaic device ITO/CuPc(10 nm)/Complex: C [3:7](125 nm)/C (10 60 60 nm)/Al(60 nm), in which bis(phenylimino)acenaphthene rhenium tricarbonyl chloride was used as the photosensitizer. The highest I and η were measured to SC p be 5.97 mA/cm and 1.40 %, respectively under air mass (AM) 1.5 simulated solar light illumination (100mW/cm ). For the devices fabricated from rhenium diimine complexes based on benzothiazole-derived ligands, it was found that the optimized device structure was ITO/CuPc(10 nm)/Complex: C [4:6](150 60 nm)/C (10 nm)/Al(60 nm), in which 1-(2-benzothiazolyl)isoquinoline rhenium 60 tricarbonyl chloride was used as the photosensitizer. The highest I and η were SC p measured to be 5.71 mA/cm and 1.72 %, respectively. The role of these rhenium complexes in the photosensitization process was studied by measuring the incident photon to current efficiency (IPCE) at different wavelengths. The photocurrent response agreed well with the absorption spectra of the rhenium complexes, CuPc, and C . This suggests that all these compounds are playing important roles as the 60 photosensitizers in the photovoltaic cell and essential to the photovoltaic process. DOI: 10.5353/th_b3786589 Subjects: Rhenium compounds - Synthesis Photosensitizing compounds Photovoltaic

Investigation Of The Photosensitizing Activity Of 1 4 Dihydropyridine Compounds In Rat Smooth Muscle

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Author : Miguel Martin-Caraballo
language : en
Publisher:
Release Date : 1995

Investigation Of The Photosensitizing Activity Of 1 4 Dihydropyridine Compounds In Rat Smooth Muscle written by Miguel Martin-Caraballo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Muscle contraction categories.

Study Of Photosensitizing Properties In Some Rhenium Diimine Complex Containing Polymers

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Author : Ching-Sum Hui
language : en
Publisher:
Release Date : 2017-01-28

Study Of Photosensitizing Properties In Some Rhenium Diimine Complex Containing Polymers written by Ching-Sum Hui and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-01-28 with categories.

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

Photosensitizing Compounds

Photosensitizing Compounds

Characterisation Of Two Photosensitizing Compounds From Typhonium Flagelliforme Schott And Their Mode Of Action In Inducing Cancer Cell Death

Photosensitizers In Medicine Environment And Security

Synthesis And Photosensitizing Properties Of Sublimable Rhenium Diimine Complexes

Investigation Of The Photosensitizing Activity Of 1 4 Dihydropyridine Compounds In Rat Smooth Muscle

Study Of Photosensitizing Properties In Some Rhenium Diimine Complex Containing Polymers

Topochemistry Of Some Photosensitive Organic Compounds

Photosensitive Diaze Compounds And Their Uses

Photosensitive Diazo Compounds

Photosensitive Diazo Compounds And Their Uses

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