Difference Bands in Time-Resolved Femtosecond Stimulated Raman Spectra of Photoexcited Intermolecular Electron Transfer from Chloronaphthalene to Tetracyanoethylene

2018 ◽  
Vol 122 (14) ◽  
pp. 3594-3605 ◽  
Author(s):  
Scott R. Ellis ◽  
David P. Hoffman ◽  
Myeongkee Park ◽  
Richard A. Mathies
Keyword(s):  
Electron Transfer ◽  
Raman Spectra ◽  
Intermolecular Electron Transfer ◽  
Time Resolved ◽  
Stimulated Raman

scholarly journals Time-Resolved Femtosecond Stimulated Raman Spectra and DFT Anharmonic Vibrational Analysis of an Electronically Excited Rhenium Photosensitizer

2020 ◽  
Vol 124 (7) ◽  
pp. 1253-1265
Author(s):  
Martin Pižl ◽  
Alessandra Picchiotti ◽  
Mateusz Rebarz ◽  
Nils Lenngren ◽  
Liu Yingliang ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Vibrational Analysis ◽  
Time Resolved ◽  
Electronically Excited ◽  
Stimulated Raman

A supramolecular Star Wars Tie Fighter Ship: electron transfer in a self-assembled triad composed of two zinc naphthalocyanines and a fullerene

2005 ◽  
Vol 09 (10) ◽  
pp. 698-705 ◽  
Author(s):  
Francis D'Souza ◽  
Suresh Gadde ◽  
Mohamed E. El-Khouly ◽  
Melvin E. Zandler ◽  
Yasuyaki Araki ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Charge Separation ◽  
Transient Absorption ◽  
Ion Pair ◽  
Spectral Studies ◽  
Stable Complex ◽  
Intermolecular Electron Transfer ◽  
Experimental Conditions ◽  
Time Resolved ◽  
Star Wars

Photoactive supramolecules composed of electron donor and electron acceptor entities are important for light energy harvesting applications. In the present study, a Star Wars Tie Fighter Ship shaped supramolecular triad was constructed by self-assembling two zinc naphthalocyanines to a fulleropyrrolidine bearing two pyridine entities using an axial coordination approach. Optical absorption and emission studies revealed stable complex formation, and the experimentally determined free-energy change revealed the possibility of electron transfer from singlet excited zinc naphthalocyanine to the fulleropyrrolidine. The picosecond time-resolved emission technique was utilized to evaluate the kinetics of charge separation while nanosecond transient absorption spectral studies provided evidence for electron transfer quenching. The measured charge-separation rate, k CS and quantum yield, Φ CS were found to be 5.7 × 109 s −1 and 0.93 in toluene, respectively, indicating an efficient process within the supramolecular triad. The charge recombination rate (k CR ) of the supramolecular ion-pair calculated from the nanosecond transient absorption technique was found to be 3.5 × 107 s −1 yielding a lifetime for the radical ion-pair (τ RIP ) of about 30 ns. Changing the solvent from the noncoordinating toluene to the coordinating benzonitrile or THF destroyed the supramolecular structure, and under these experimental conditions, only intermolecular electron transfer from the triplet excited zinc naphthalocyanine to fulleropyrrolidine could be observed. Under these conditions, the measured electron transfer rates, k et , T inter , were found to be 2.6 × 107 M −1. s −1 in benzonitrile and 1.2 × 107 M −1. s −1 in THF, respectively.

Synthesis, Photophysical Properties and Photoinduced Intermolecular Electron Transfer of a Novel Aryl Benzyl Ester Dendritic Axially Substituted Silicon (IV) Phthalocyanine

2014 ◽  
Vol 998-999 ◽  
pp. 99-102 ◽  
Author(s):  
Xiu Qin Chen ◽  
Dong Dong Ma ◽  
Su Juan Pan ◽  
Yu Hua Wang ◽  
Kui Zhi Chen ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photophysical Properties ◽  
Dendritic Structure ◽  
Fluorescence Emission ◽  
Benzyl Ester ◽  
Intermolecular Electron Transfer ◽  
Time Resolved ◽  
H Nmr ◽  
Methoxycarbonyl Group ◽  
Photoinduced Intermolecular Electron Transfer

An aryl benzyl ester dendritic axially substituted silicon (IV) phthalocyanine, a di-{3,5-di-(4-methoxycarbonyl group benzyloxy) benzyloxy) benzyloxy} axially substituted silicon (IV) phthalocyanine (DSiPc) was synthesized. Its structure was characterized by elemental analysis, 1H NMR, IR and ESI-MS. The photophysical property of DSiPc was studied by steady and time-resolved spectroscopic methods. The steric hindrance of dendritic structure can reduced the aggregation efficiently. The photoinduced intermolecular electron transfer between this novel macromolecule and benzoquinone was studied. The results showed that the fluorescence emission of this dendritic phthalocyanine could be quenched by BQ. Therefore, this novel dendritic phthalocyanine was an effective new electron donor and transmission complex could be used as a potential artificial photosynthesis system.

Photoinduced electron-transfer processes between phthalocyanines and perylene derivatives

2006 ◽  
Vol 10 (10) ◽  
pp. 1190-1196 ◽  
Author(s):  
Koji Kitazume ◽  
Yu Chen ◽  
Mitsunari Itou ◽  
Yasuyuki Araki ◽  
Satoshi Uchida ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Transient Absorption ◽  
Triplet States ◽  
Intermolecular Electron Transfer ◽  
Absorption Bands ◽  
Time Resolved ◽  
Transfer Processes ◽  
Perylene Derivatives ◽  
Electron Transfer Processes

Photoinduced electron-transfer processes between phthalocyanines ( H2Pc and ZnPc ) as electron donors and perylene derivatives as electron acceptors have been studied using a time-resolved, nanosecond transient absorption method in benzonitrile. The observed findings show that intermolecular electron transfer takes place via the excited triplet states of ZnPc and H2Pc , as confirmed by the characteristic transient absorption bands in the near-IR region. The visible light excitation of the mixtures of H2Pc and the perylene derivatives adsorbed onto TiO2gave a relatively high photovoltaic efficiency.

Vapochromism induced by intermolecular electron transfer coupled with hydrogen-bond formation in zinc dithiolene complex

2020 ◽  
Vol 8 (42) ◽  
pp. 14939-14947
Author(s):  
So Yokomori ◽  
Shun Dekura ◽  
Tomoko Fujino ◽  
Mitsuaki Kawamura ◽  
Taisuke Ozaki ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Electron Transfer ◽  
Bond Formation ◽  
Intermolecular Electron Transfer ◽  
Hydrogen Bond Formation ◽  
Complex Crystal

A novel vapochromic mechanism by intermolecular electron transfer coupled with hydrogen-bond formation was realized in a zinc dithiolene complex crystal.

Intermolecular electron transfer involving phosphoryl and nonphosphoryl methionine and tryptophan, a pulse radiolysis study

1997 ◽  
Vol 50 (4) ◽  
pp. 385-391 ◽  
Author(s):  
Chu Gao-Sheng ◽  
Yao Si-De ◽  
Zhang Zhi-Cheng ◽  
Wang Wen-Feng ◽  
Zhang Man-Wei
Keyword(s):  
Electron Transfer ◽  
Pulse Radiolysis ◽  
Intermolecular Electron Transfer
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