Author: Kevin D. LeyPublisher:
ISBN:
Category :
Languages : en
Pages : 372
Book Description
Photophysics of PI-conjugated Polymers and Oligomers that Incorporate Metal to Ligand Charge Transfer Chromophores
Author: Kevin D. LeyAllgemeiner Teil, Subsect. Caprini
Author: Photophysical Studies of Pi-conjugated Oligomers and Polymers That Incorporate Inorganic MLCT Chromophores
Author: Keith WaltersPublisher:
ISBN: 9780530004112
Category : Science
Languages : en
Pages : 272
Book Description
Abstract: The photophysics and photochemistry of several molecular series incorporating inorganic MLCT chromophores within pi-conjugated oligomers and polymers is presented, including photothermal measurements to determine nonradiative decay rates. Dissertation Discovery Company and University of Florida are dedicated to making scholarly works more discoverable and accessible throughout the world. This dissertation, "Photophysical Studies of Pi-conjugated Oligomers and Polymers That Incorporate Inorganic MLCT Chromophores" by Keith A. Walters, was obtained from University of Florida and is being sold with permission from the author. A digital copy of this work may also be found in the university's institutional repository, IR@UF. 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.
Photophysical Studies of Pi-conjugated Oligomers and Polymers that Incorporate Inorganic MLCT Chromophores
Author: Keith A. WaltersDissertation Abstracts International
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 740
Book Description
American Doctoral Dissertations
Author: Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 816
Book Description
Directory of Graduate Research
Author: Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 1846
Book Description
Faculties, publications and doctoral theses in departments or divisions of chemistry, chemical engineering, biochemistry and pharmaceutical and/or medicinal chemistry at universities in the United States and Canada.
Design, Synthesis and Functionalization of Organic and Metal-containing [pi]-conjugated Push-pull Chromophores
![Design, Synthesis and Functionalization of Organic and Metal-containing [pi]-conjugated Push-pull Chromophores PDF](https://books.google.com/books/content/images/frontcover/HM7VzQEACAAJ?fife=w80-h100)
Author: 陳興Photophysics of Ruthenium Polypyridyl Dendrimers and Polymers of Deliberate Architecture
Author: Samantha GlazierPublisher:
ISBN: 9780493504018
Category :
Languages : en
Pages : 222
Book Description
The photophysical properties of two families of polypyridyl complexes of ruthenium were studied in both fluid solutions at 298 K and frozen glasses at 77 K. The absorption and emission spectra, excited state lifetimes and quantum yields have been obtained for poly-amidoamine based dendrimers modified with (4, 8, 16, 32 and 64) pendant-[Ru(tpy)2] +2 (tpy is 2,2':6',2 & Prime;-terpyridine) and [Ru(bpy)3]+2 (bpy is 2,2'-bipyridine) chromophores and for two 2,2 ':6',2 & Prime;-terpyridine bridging ligands, [ctpy-x-ctpy] and [ctpy-b-ctpy], with one, two or multiple Ru centers. In analogy to the behavior exhibited by the reference compounds ([Ru(tpy)2]+2 and [Ru(bpy) 3]+2), the bipyridine derivatives exhibit longer lifetimes and higher quantum yields when compared to the corresponding terpyridine complexes. In the case of dendrimers, generation-dependent changes were observed which are discussed in terms of the effects of solvent on the coupling between the emitting metal-to-ligand charge transfer state and the nearby metal-centered state. Solvent effects on the coupling were explored by comparing results in butyronitrile and dimethylacetamide with the latter being used as a mimic of the dendritic backbone. The results suggest that for the higher generations, the dendritic backbone acts as a solvent in affecting the photophysical behavior. For the family of chiral multimetallic compounds, the room temperature absorption and emission maxima of {[(( - )-ctpy)Ru]-( - )-[ctpy-b-ctpy]-[Ru(( - )-ctpy)]}(PF6)4 and (( - )-[ctpy-b-ctpy])-{[Ru(( - )-[ctpy-b-ctpy])](PF 6)2)n were shifted to lower energies and also exhibited significantly longer luminescence lifetimes when compared to the [Ru(( - )-ctpy)2](PF6)2, {[(( - )-ctpy)Ru]-( - )-[ctpy-x-ctpy]-[Ru(( - )- ctpy)]}(PF6)4 and (( - )-[ctpy-x-ctpy])-{[Ru(( - )-[ctpy-x-ctpy])](PF6) 2}n. The shifts in energy are discussed using a particle-in-a-box model. The luminescence lifetimes are discussed in terms of the accessibility of the metal-centered state. The Stern-Volmer quenching constants of the [Ru(bpy) 3]2+ pendant dendrimers were measured in the presence of three nitroaromatic quenchers (2,4,6-trinitrotoluene, 2,4-dinitrotoluene and nitrotoluene). The quenching efficiencies were calculated and found to peak for dend-16-Ru(bpy)3 corresponding to maximal chromophore accessibility. The quenching rates were dramatically enhanced by electrostatic attraction between the positively charged dendrimers and negatively charged quenchers (K3Fe(CN)6 and Na4Fe(CN)6). Investigation of the rotational anisotropy of second harmonic generation from dend-8-tpy/Fe2+ films deposited on a graphite substrate corroborated STM results showing the formation of highly ordered arrays.
Handbook of Photochemistry
Author: Marco MontaltiPublisher: CRC Press
ISBN: 1420015192
Category : Science
Languages : en
Pages : 662
Book Description
Since the publication of the second edition of this handbook in 1993, the field of photochemical sciences has continued to expand across several disciplines including organic, inorganic, physical, analytical, and biological chemistries, and, most recently, nanosciences. Emphasizing the important role light-induced processes play in all of these fie