Physicochemical and Photophysical Studies on Porphyrin-Based Donor−Acceptor Systems:  Effect of Redox Potentials on Ultrafast Electron-Transfer Dynamics

2007 ◽  
Vol 111 (30) ◽  
pp. 9078-9087 ◽  
Author(s):  
D. Amilan Jose ◽  
Atindra D. Shukla ◽  
G. Ramakrishna ◽  
Dipak K. Palit ◽  
Hirendra N. Ghosh ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Redox Potentials ◽  
Donor Acceptor ◽  
Photophysical Studies ◽  
Ultrafast Electron Transfer

Ultrafast Electron Transfer Dynamics in CdSe/CdTe Donor−Acceptor Nanorods

2008 ◽  
Vol 112 (32) ◽  
pp. 12074-12076 ◽  
Author(s):  
Chad J. Dooley ◽  
Stoichko D. Dimitrov ◽  
Torsten Fiebig
Keyword(s):  
Electron Transfer ◽  
Donor Acceptor ◽  
Ultrafast Electron Transfer

scholarly journals Long-lived triplet charge-separated state in naphthalenediimide based donor–acceptor systems

2021 ◽  
Author(s):  
Alexander Aster ◽  
Christopher Rumble ◽  
Anna-Bea Bornhof ◽  
Hsin-Hua Huang ◽  
Naomi Sakai ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Excited States ◽  
Donor Acceptor ◽  
Triplet Excited States ◽  
Ultrafast Electron Transfer

Ultrafast electron transfer from singlet and triplet excited states in equilibrium results in the population of both singlet and triplet charge-separated states.

scholarly journals Ultrafast electron-transfer in a fully conjugated coumarin-ferrocene donor-acceptor dyads

2019 ◽  
Vol 887 ◽  
pp. 86-97 ◽  
Author(s):  
Alex J. King ◽  
Yuriy V. Zatsikha ◽  
Tanner Blessener ◽  
Forrest Dalbec ◽  
Philip C. Goff ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Donor Acceptor ◽  
Ultrafast Electron Transfer

scholarly journals The Metallocene Battery ‐ Ultrafast Electron Transfer Self Exchange Rate Accompanied by a Harmonic Height Breathing

2021 ◽  
Author(s):  
Seyyed Mohsen Beladi-Mousavi ◽  
Shamaila Sadaf ◽  
Ann-Kristin Hennecke ◽  
Jonas Klein ◽  
Arsalan Mado Mahmood ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Exchange Rate ◽  
Ultrafast Electron Transfer

scholarly journals Insight to Microbial Fe(III) Reduction Mediated by Redox-Active Humic Acids with Varied Redox Potentials

2021 ◽  
Vol 18 (13) ◽  
pp. 6807
Author(s):  
Jingtao Duan ◽  
Zhiyuan Xu ◽  
Zhen Yang ◽  
Jie Jiang
Keyword(s):  
Molecular Weight ◽  
Electron Transfer ◽  
Humic Acids ◽  
Weight Fraction ◽  
Electrochemical Analysis ◽  
Microbial Reduction ◽  
Redox Potentials ◽  
Groundwater Environment ◽  
Redox Active ◽  
Different Molecular Weight

Redox-active humic acids (HA) are ubiquitous in terrestrial and aquatic systems and are involved in numerous electron transfer reactions affecting biogeochemical processes and fates of pollutants in soil environments. Redox-active contaminants are trapped in soil micropores (<2 nm) that have limited access to microbes and HA. Therefore, the contaminants whose molecular structure and properties are not damaged accumulate in the soil micropores and become potential pollution sources. Electron transfer capacities (ETC) of HA reflecting redox activities of low molecular weight fraction (LMWF, <2.5) HA can be detected by an electrochemical method, which is related to redox potentials (Eh) in soil and aquatic environments. Nevertheless, electron accepting capacities (EAC) and electron donating capacities (EDC) of these LMWF HA at different Eh are still unknown. EDC and EAC of different molecular weight HA at different Eh were analyzed using electrochemical methods. EAC of LMWF at −0.59 V was 12 times higher than that at −0.49 V, while EAC increased to 2.6 times when the Eh decreased from −0.59 V to −0.69 V. Afterward, LMWF can act as a shuttle to stimulate microbial Fe(III) reduction processes in microbial reduction experiments. Additionally, EAC by electrochemical analysis at a range of −0.49–−0.59 V was comparable to total calculated ETC of different molecular weight fractions of HA by microbial reduction. Therefore, it is indicated that redox-active functional groups that can be reduced at Eh range of −0.49–−0.59 are available to microbial reduction. This finding contributes to a novel perspective in the protection and remediation of the groundwater environment in the biogeochemistry process.

Photoelectrochemical properties of supramolecular composites of an anionic zinc chlorin and Li+@C60 on SnO2

2014 ◽  
Vol 18 (10n11) ◽  
pp. 982-990 ◽  
Author(s):  
Kei Ohkubo ◽  
Yuki Kawashima ◽  
Kentaro Mase ◽  
Hayato Sakai ◽  
Taku Hasobe ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Photovoltaic Cells ◽  
Lithium Ion ◽  
Transparent Electrode ◽  
Supramolecular Complex ◽  
Photoelectrochemical Properties ◽  
Triplet Excited State ◽  
Optically Transparent ◽  
Donor Acceptor

An electron donor–acceptor supramolecular complex was formed between an anionic zinc chlorin carboxylate ( ZnCh -) and lithium-ion-encapsulated [60]fullerene ( Li +@ C 60) by an electrostatic interaction in benzonitrile ( PhCN ). Photoinduced electron transfer in the supramolecular complex of ZnCh -/ Li +@ C 60 resulted in the formation of the charge-separated state via electron transfer from the triplet excited state of ZnCh - to Li +@ C 60. We report herein photovoltaic cells using ZnCh -/ Li +@ C 60 nanoclusters, which are assembled on the optically transparent electrode (OTE) of nanostructured SnO 2 (OTE/ SnO 2). The photoelectrochemical behavior of the nanostructured SnO 2 film of supramolecular nanoclusters of ZnCh - and Li +@ C 60 denoted as OTE/ SnO 2/( ZnCh -/ Li +@ C 60)n is significantly higher than the single component films of ZnCh - or Li +@ C 60 clusters, denoted as OTE/ SnO 2/( ZnCh -)n or OTE/ SnO 2/( Li +@ C 60)n.

Through-bond modulation of intramolecular electron transfer in rigidly linked donor-acceptor systems

1989 ◽  
Vol 164 (2-3) ◽  
pp. 120-125 ◽  
Author(s):  
James M. Lawson ◽  
Donald C. Craig ◽  
Michael N. Paddon-Row ◽  
Jan Kroon ◽  
Jan W. Verhoeven
Keyword(s):  
Electron Transfer ◽  
Intramolecular Electron Transfer ◽  
Donor Acceptor
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