scholarly journals Excited state structural dynamics of 4-cyano-4′-hydroxystilbene: deciphering the signatures of proton-coupled electron transfer using ultrafast Raman loss spectroscopy

2019 ◽  
Vol 21 (40) ◽  
pp. 22409-22419 ◽  
Author(s):  
Reshma Mathew ◽  
Surajit Kayal ◽  
Adithya Lakshmanna Yapamanu
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Structural Dynamics ◽  
Transfer Process ◽  
Electron Transfer Process ◽  
Proton Coupled Electron Transfer

The photo-initiated proton-coupled electron transfer process in the 4-cyano-4′-hydroxystilbene–tert-butylamine adduct strongly affects the excited-state structural dynamics of CHSB.

Thionine–graphene oxide covalent hybrid and its interaction with light

2017 ◽  
Vol 19 (22) ◽  
pp. 14412-14423 ◽  
Author(s):  
Ewelina Krzyszkowska ◽  
Justyna Walkowiak-Kulikowska ◽  
Sven Stienen ◽  
Aleksandra Wojcik
Keyword(s):  
Electron Transfer ◽  
Graphene Oxide ◽  
Excited State ◽  
Transfer Process ◽  
Singlet Excited State ◽  
Functionalized Graphene ◽  
Electron Transfer Process ◽  
Functionalized Graphene Oxide ◽  
Back Electron Transfer

Quenching of the thionine singlet excited state in covalently functionalized graphene oxide with an efficient back electron transfer process.

scholarly journals Two-electron transfer stabilized by excited-state aromatization

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Jinseok Kim ◽  
Juwon Oh ◽  
Seongchul Park ◽  
Jose L. Zafra ◽  
Justin R. DeFrancisco ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Excited States ◽  
Transfer Process ◽  
Comprehensive Understanding ◽  
Electron Transfer Process ◽  
Photoactive Materials ◽  
Donor Acceptor ◽  
Scientific Significance

Abstract The scientific significance of excited-state aromaticity concerns with the elucidation of processes and properties in the excited states. Here, we focus on TMTQ, an oligomer composed of a central 1,6-methano[10]annulene and 5-dicyanomethyl-thiophene peripheries (acceptor-donor-acceptor system), and investigate a two-electron transfer process dominantly stabilized by an aromatization in the low-energy lying excited state. Our spectroscopic measurements quantitatively observe the shift of two π-electrons between donor and acceptors. It is revealed that this two-electron transfer process accompanies the excited-state aromatization, producing a Baird aromatic 8π core annulene in TMTQ. Biradical character on each terminal dicyanomethylene group of TMTQ allows a pseudo triplet-like configuration on the 8π core annulene with multiexcitonic nature, which stabilizes the energetically unfavorable two-charge separated state by the formation of Baird aromatic core annulene. This finding provides a comprehensive understanding of the role of excited-state aromaticity and insight to designing functional photoactive materials.

scholarly journals Electron transfer by singlet excited state of porphyn and electron acceptor affinity in rigid medium: photoacoustic phase angle analysis

1997 ◽  
Vol 22 (0) ◽  
pp. 83-92
Author(s):  
Marinônio Lopes CORNÉLIO
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Phase Behavior ◽  
Electron Acceptor ◽  
Transfer Process ◽  
Spectral Region ◽  
Optical Excitation ◽  
Singlet Excited State ◽  
Electron Transfer Process ◽  
Excitation Process

Photoacoustic spectroscopy provides information about both amplitude and phase of the response of a system to an optical excitation process. This paper presents the studies of the phase in the electron transfer process between octaethylporphyn (OEP) and quinone molecules dispersed in a polymeric matrix. It was observed a tendency in the phase behavior to small values only in the spectral region near to 620 nm, while for shorter wavelength did not show any tendency. These measurements suggested that the electron transfer to acceptor occurred with the participation of octaethylporphyn singlet excited state.

Excited-state dynamics and electron transfer process of 1,3,5-triamino-2,4,6-trinitrobenzene

RSC Advances ◽  
2016 ◽  
Vol 6 (60) ◽  
pp. 55560-55567 ◽  
Author(s):  
Genbai Chu ◽  
Feng Lu ◽  
Jianting Xin ◽  
Tao Xi ◽  
Min Shui ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Transfer Process ◽  
Efficient Tool ◽  
Electron Transfer Process ◽  
Excited State Dynamics ◽  
Transfer Processes ◽  
Nitro Explosives ◽  
Electron Transfer Processes

Insights into the excited-state dynamics and electron transfer processes of nitro explosives offer an efficient tool for unravelling ultrafast and complex detonation physics.

Efficient oxygen evolution on hematite at neutral pH enabled by proton-coupled electron transfer

2016 ◽  
Vol 52 (97) ◽  
pp. 14015-14018 ◽  
Author(s):  
Toshihiro Takashima ◽  
Koki Ishikawa ◽  
Hiroshi Irie
Keyword(s):  
Electron Transfer ◽  
Oxygen Evolution ◽  
Transfer Process ◽  
Electron Transfer Process ◽  
Neutral Ph ◽  
Proton Coupled Electron Transfer

The oxygen evolution activity of hematite at neutral pH was enhanced by inducing the concerted proton-coupled electron transfer process.

scholarly journals Deciphering the incognito role of water in a light driven proton coupled electron transfer process

2018 ◽  
Vol 9 (4) ◽  
pp. 910-921 ◽  
Author(s):  
Senthil Kumar Thiyagarajan ◽  
Raghupathy Suresh ◽  
Vadivel Ramanan ◽  
Perumal Ramamurthy
Keyword(s):  
Electron Transfer ◽  
Proton Transfer ◽  
Transfer Process ◽  
Electron Transfer Process ◽  
Solvent Water ◽  
Proton Coupled Electron Transfer ◽  
Electron Proton Transfer ◽  
Role Of Solvent ◽  
Proton Transfer Process

The incognito role of solvent water as a proton transfer bridge in a multi-site electron proton transfer process was depicted.

scholarly journals Ultrafast Excited-State Dynamics of Diketopyrrolopyrrole (DPP)-Based Materials: Static versus Diffusion-Controlled Electron Transfer Process

2015 ◽  
Vol 119 (28) ◽  
pp. 15919-15925 ◽  
Author(s):  
Qana A. Alsulami ◽  
Shawkat M. Aly ◽  
Subhadip Goswami ◽  
Erkki Alarousu ◽  
Anwar Usman ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Transfer Process ◽  
Electron Transfer Process ◽  
Excited State Dynamics ◽  
Diffusion Controlled

Photo-induced proton coupled electron transfer from a benzophenone ‘antenna’ to an isoindoline nitroxide

RSC Advances ◽  
2015 ◽  
Vol 5 (116) ◽  
pp. 95598-95603 ◽  
Author(s):  
Jason C. Morris ◽  
Liam A. Walsh ◽  
Brunell A. Gomes ◽  
Didier Gigmes ◽  
Kathryn E. Fairfull-Smith ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Excited State ◽  
Hydrogen Atom ◽  
Transfer Process ◽  
Energy Transfer Process ◽  
Hydrogen Atom Transfer ◽  
Atom Transfer ◽  
Proton Coupled Electron Transfer

When exposed to light, a novel nitroxide-benzophenone hybrid will undergo an energy transfer process whereby the nitroxide enters an excited state which induces an efficient hydrogen atom transfer from unactivated alkanes.

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