Structure of a Cd(ii) mixed-ligand coordination polymer: single crystalline conductance switch involving photoinduced electron transfer and photocoloration

CrystEngComm ◽  
2018 ◽  
Vol 20 (38) ◽  
pp. 5663-5666 ◽  
Author(s):  
Jia Huang ◽  
Jie Zhang ◽  
Runhua He ◽  
Zhiyong Fu
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Fluorescence Emission ◽  
Building Blocks ◽  
Mixed Ligand ◽  
Molecular Wire ◽  
Single Crystalline ◽  
Donor And Acceptor ◽  
Ligand Coordination ◽  
Photophysical Behavior

A novel Cd(ii)-MOF with tunable photophysical behavior has been developed. The control of color, fluorescence emission and conductivity is achieved in a single crystalline conductance switch by incorporating donor and acceptor building blocks into a molecular wire.

scholarly journals Photoinduced Electron Transfer-Promoted Reactions Using Exciplex-Type Organic Photoredox Catalyst Directly Linking Donor and Acceptor Arenes

Molecules ◽  
2019 ◽  
Vol 24 (24) ◽  
pp. 4453
Author(s):  
Mugen Yamawaki ◽  
Akiko Asano ◽  
Toshiki Furutani ◽  
Yuki Izumi ◽  
Yosuke Tanaka ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Polar Solvent ◽  
Catalyst Activity ◽  
Excited Complex ◽  
Redox Catalyst ◽  
Low Concentrations ◽  
Donor And Acceptor

Directly linked donor and acceptor arenes, such as phenanthrene/naphthalene/biphenyl and 1,3-dicyanobenzene were found to work as photoredox catalysts in the photoreactions of indene, 2,3-dimethyl-2-butene, and 4-methoxyphenylacetic acid. The new stable organic photocatalyst forms an intramolecular exciplex (excited complex) when irradiated in a polar solvent and shows redox catalyst activity, even at low concentrations. To the best of our knowledge, this is the first example of an intramolecular exciplex working as a redox catalyst.

scholarly journals Thorpe−Ingold Effect on Photoinduced Electron Transfer of Dialkylsilylene-Spaced Divinylarene Copolymers Having Alternating Donor and Acceptor Chromophores

2007 ◽  
Vol 40 (26) ◽  
pp. 9238-9243 ◽  
Author(s):  
Mei-Yu Yeh ◽  
Hsin-Chieh Lin ◽  
Tsong-Shin Lim ◽  
Shern-Long Lee ◽  
Chun-hsien Chen ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Donor And Acceptor

Transient states in photoinduced electron transfer reactions of porphyrin- and phthalocyanine-fullerene dyads

2009 ◽  
Vol 13 (10) ◽  
pp. 1090-1097 ◽  
Author(s):  
Helge Lemmetyinen ◽  
Nikolai Tkachenko ◽  
Alexander Efimov ◽  
Marja Niemi
Keyword(s):  
Electron Transfer ◽  
Charge Separation ◽  
Photoinduced Electron Transfer ◽  
Transient State ◽  
Primary Electron ◽  
Transfer Reactions ◽  
Acceptor Pair ◽  
Electron Transfer Reactions ◽  
Exciplex Formation ◽  
Donor And Acceptor

This paper combines the most important results on studies performed by the authors during the last decade on photoinduced electron transfer reactions of pheophytin-, phthalocyanine-, and porphyrin-fullerene dyads, in which donor and acceptor moieties are covalently linked to each other. Practically all studied molecules form an intramolecular exciplex as a transient state before the formation of the charge separation state or tight ion pair. When the center-to-center distance of the donor and acceptor pair is short (7–10 Å) both the exciplex formation and primary electron transfer are extremely fast with rate constants of 7–23 × 1012 s -1 and 40–1400 × 109 s -1, respectively. Rates become slower when the distance and orientational fluctuation increases. No systematic correlation between free energies and the rates of the formation and recombination of the exciplex and the charge separation state, respectively, were observed. The mechanism is discussed in frames of the Marcus electron transfer and the radiationless quantum transition theories.

Polyether-Bridged Sexithiophene as a Complexation-Gated Molecular Wire for Intramolecular Photoinduced Electron Transfer

2005 ◽  
Vol 127 (44) ◽  
pp. 15372-15373 ◽  
Author(s):  
Takuro Oike ◽  
Tomoyuki Kurata ◽  
Kazuo Takimiya ◽  
Tetsuo Otsubo ◽  
Yoshio Aso ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Molecular Wire

scholarly journals Sensing mechanism of a new fluorescent probe for hydrogen sulfide: photoinduced electron transfer and invalidity of excited-state intramolecular proton transfer

RSC Advances ◽  
2021 ◽  
Vol 11 (36) ◽  
pp. 22214-22220
Author(s):  
Xiumin Liu ◽  
Yutai Qi ◽  
Shenhan Pu ◽  
Yi Wang ◽  
Ziqing Gao
Keyword(s):  
Electron Transfer ◽  
Hydrogen Sulfide ◽  
Excited State ◽  
Fluorescence Quenching ◽  
Photoinduced Electron Transfer ◽  
Stokes Shift ◽  
Fluorescence Emission ◽  
Intramolecular Proton Transfer ◽  
Strong Fluorescence ◽  
Theoretical Results

Our theoretical results show that the fluorescence quenching of DFAN is caused by PET mechanism and the large Stokes shift fluorescence emission of DFAH is not due to the ESIPT mechanism. Due to the absence of PET process, enol structure emits strong fluorescence, which is inconsistent with the fluorescence mechanism in the experiment.

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