Design, Synthesis and Functionalization of Organic and Metal-containing [pi]-conjugated Push-pull Chromophores PDF Download

Author: 陳興
Publisher:
ISBN:
Category : Boron compounds
Languages : en
Pages : 387

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Author: 姚子希
Publisher:
ISBN:
Category : Nanostructured materials
Languages : en
Pages : 133

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Author: Haichang Zhang
Publisher: Frontiers Media SA
ISBN: 2889664813
Category : Science
Languages : en
Pages : 126

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Author: Haichang Zhang
Publisher: Frontiers Media SA
ISBN: 2889716112
Category : Science
Languages : en
Pages : 70

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Author: Atsushi Nagai
Publisher: CRC Press
ISBN: 1351859625
Category : Science
Languages : en
Pages : 536

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Conjugated Objects: Development, Synthesis, and Application contains 17 chapters written by young researchers and contains current trends in pi-conjugated systems for application in broad research areas such as design of unique pi-conjugation, catalysts, self-assembly, charge transfer complexes, liquid crystals, supramolecules, and nanostructures by using conjugated small and/or macro-objects organically or electrochemically. The book can be used as a textbook of basic learning by undergraduate and graduate students of chemistry, electrical and electronics engineering, and materials science and by supramolecular researchers in nanotechnology and biotechnology.

Author: Yau-Hin Hong
Publisher: Open Dissertation Press
ISBN: 9781361038383
Category : Science
Languages : en
Pages : 332

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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 THFwater 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 nucleationelongation 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 THFwater dispersions. The self-assembly was believed to be mediated by the ππ 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 hydrophobichydrophobic interactions between the alkynyl units. It has been shown that modulation of t

Author: Renzo Shamey
Publisher: Springer Nature
ISBN: 3030898628
Category : Science
Languages : en
Pages : 1634

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This fully revised and expanded 2nd edition provides a single authoritative resource describing the concepts of color and the application of color science across research and industry. Significant changes for the 2nd edition include: New and expanded sections on color engineering More entries on fundamental concepts of color science and color terms Many additional entries on specific materials Further material on optical concepts and human visual perception Additional articles on organisations, tools and systems relevant to color A new set of entries on 3D presentation of color In addition, many of the existing entries have been revised and updated to ensure that the content of the encyclopedia is current and represents the state of the art. The work covers the full gamut of color: the fundamentals of color science; the physics and chemistry; color as it relates to optical phenomena and the human visual system; and colorants and materials. The measurement of color is described through entries on colorimetry, color spaces, color difference metrics, color appearance models, color order systems and cognitive color. The encyclopedia also has extensive coverage of applications throughout industry, including color imaging, color capture, display and printing, and descriptions of color encodings, color management, processing color and applications relating to color synthesis for computer graphics are included. The broad scope of the work is illustrated through entries on color in art conservation, color and architecture, color and education, color and culture, and biographies of some of the key figures involved in color research throughout history. With over 250 entries from color science researchers across academia and industry, this expanded 2nd edition of the Encyclopedia of Color Science and Technology remains the most important single resource in color science.

Author: 陳展耀
Publisher:
ISBN:
Category : Optoelectronics
Languages : en
Pages : 355

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Author: Haruyuki Kamemoto
Publisher:
ISBN:
Category : Anthuriums
Languages : en
Pages : 273

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Author: Zachary Nelson
Publisher:
ISBN:
Category :
Languages : en
Pages : 229

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This thesis summarizes the design, synthesis, and application of novel small-molecule and polymeric materials, with emphasis on understanding and tuning the chromophore electronic structure to maximize properties including Faraday rotation and delayed fluorescence. In Chapter 1, we introduce the magneto-optical property Faraday rotation. The current frontiers in performance, applications, and mechanistic understanding of Faraday rotation in organic-chromophore thin-films is discussed. Faraday rotation measurements of several novel materials are introduced in context. In Chapter 2, we evaluate the Faraday rotation in thin films of several phthalocyanine and porphyrin derivatives, and observe maximum Verdet constants greater than those found in competing inorganic materials. The effect of chemical modifications, including the introduction of paramagnetic and chiral centers, is discussed. In Chapter 3, we evaluate the Faraday rotation in thin films of pi-conjugated polymers when influenced by chiral moieties. We demonstrate the key role chirality serves in the magneto-optical properties of these materials, the influence of structural order and film thickness on Faraday rotation, and report among the largest Verdet constants observed to date in organic thin films. In Chapter 4, we develop the polymerization for and evaluate the properties of a new class of polyarylene chalcogenides. We utilized dynamic covalent SNAr behavior to demonstrate selective depolymerization. In addition, we studied the mechanism of the bright photoemission, ascribing it to delayed fluorescence enabled by the presence of sulfur atoms. In Chapter 5, we discuss the synthesis and properties of two classes of solution-processable materials: M(III) and Au(I) arylthiolate coordination polymers. We demonstrate the presence of strong metal-metal interactions between M(III) centers along the polymer backbone. Further, we discuss the strong phosphorescence and dynamic supramolecular coordination in the solution phase of the Au(I) coordination polymers.