Visible light-induced polymerization reactions: The seven-role of the electron transfer process in the dye/iron arene complex/amine system

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.

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Efficient organic degradation under visible light by α-Bi2O3 with a CuO -assistant electron transfer process

Applied Catalysis B Environmental ◽

10.1016/j.apcatb.2014.07.058 ◽

2015 ◽

Vol 163 ◽

pp. 267-276 ◽

Cited By ~ 35

Author(s):

Hai-Ying Jiang ◽

Guigao Liu ◽

Mu Li ◽

Jingjing Liu ◽

Wenbin Sun ◽

...

Keyword(s):

Electron Transfer ◽

Visible Light ◽

Transfer Process ◽

Electron Transfer Process ◽

Organic Degradation

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Visible light induced electron transfer process over nitrogen doped TiO2 nanocrystals prepared by oxidation of titanium nitride

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2007.12.079 ◽

2008 ◽

Vol 157 (1) ◽

pp. 57-63 ◽

Cited By ~ 107

Author(s):

Zhongbiao Wu ◽

Fan Dong ◽

Weirong Zhao ◽

Sen Guo

Keyword(s):

Electron Transfer ◽

Visible Light ◽

Titanium Nitride ◽

Transfer Process ◽

Tio2 Nanocrystals ◽

Electron Transfer Process ◽

Doped Tio2 ◽

Nitrogen Doped

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Understanding the electron transfer process in ZnO–naphthol azobenzoic acid composites from photophysical characterisation

Physical Chemistry Chemical Physics ◽

10.1039/c6cp02908f ◽

2016 ◽

Vol 18 (32) ◽

pp. 22179-22187 ◽

Cited By ~ 2

Author(s):

Leena George ◽

Athira K. Kunhikannan ◽

Rajith Illathvalappil ◽

Divya Ottoor ◽

Sreekumar Kurungot ◽

...

Keyword(s):

Electron Transfer ◽

Visible Light ◽

Transfer Process ◽

Light Absorption ◽

Organic Molecules ◽

Semiconductor Nanoparticles ◽

Electron Transfer Process ◽

Visible Light Absorption ◽

Catalytic Sites ◽

Surface Modified

Semiconductor nanoparticles surface modified with organic molecules capable of visible light absorption and effectively transferring the electrons to the catalytic sites have the potential to be good photocatalysts.

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Visible-light-induced phenylchalcogenyl-oxygenation of allenes having aryl or electron withdrawing substituents with ambient air as a sole oxidant

Organic & Biomolecular Chemistry ◽

10.1039/c6ob02033j ◽

2016 ◽

Vol 14 (48) ◽

pp. 11415-11425 ◽

Cited By ~ 7

Author(s):

Gullapalli Kumaraswamy ◽

Swargam Vijaykumar ◽

Kukkadapu Ankamma ◽

Vykunthapu Narayanarao

Keyword(s):

Electron Transfer ◽

Visible Light ◽

Transfer Process ◽

Stereoselective Synthesis ◽

Ambient Air ◽

Single Electron ◽

Single Electron Transfer ◽

Electron Transfer Process ◽

Electron Withdrawing Substituents

The stereoselective synthesis of α-phenylselenyl- or telluryl β-aryl acrylaldehydes/ketones from aryl allenes/1,3-diarylallene by an oxidative photo-induced single electron transfer process using benign ambient air as a sole oxidant was achieved.

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Surface photochemistry: Semiconductor mediated reactions of some saturated strained hydrocarbons

Canadian Journal of Chemistry ◽

10.1139/v88-256 ◽

1988 ◽

Vol 66 (7) ◽

pp. 1579-1588 ◽

Cited By ~ 6

Author(s):

N. Colin Baird ◽

Anthony M. Draper ◽

Paul de Mayo

Keyword(s):

Electron Transfer ◽

Quantum Yield ◽

Transfer Process ◽

Radical Cations ◽

Thermal Reaction ◽

Electron Transfer Process ◽

Electron Transfer Mechanism ◽

Valence Isomerization ◽

Back Electron Transfer

Quadricyclane (1) and 1,8-bishoniocubane (2) have been found to undergo valence isomerization to norborndiene and tricyclo[4.2.2.02,5]deca-3,7-diene, respectively, on illuminated CdS and ZnO. An electron transfer mechanism is proposed. Quantum yield, solvent effects, the role of oxygen, and the quenching of the reaction were investigated, and were consistent with this interpretation. The thermal reaction of 1 on CdS was also suggested to be an electron transfer process involving, in this case, defects or trapped holes on the surface of the semiconductor. An examination of a series of strained hydrocarbons structurally related to 1 (tetracyclo[3.3.0.02,8.04,6]octane 3, pentacyclo[4.3.0.02,4.03.805,7]nonane 4 and pentacyclo[4.4.0.02,4.03,8.05,7]decane 5) resulted, largely, in a demonstration of the resistance of their respective radical cations to rearrangement prior to back electron transfer. Calculations by MNDO, in combination with a modified version of MM2, were used to explore the differences in the reactivity of the radical cations of 1, 3, 4, 5, and an interpretation is presented.

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N-CND modified NH2-UiO-66 for photocatalytic CO2 conversion under visible light by a photo-induced electron transfer process

Chemical Communications ◽

10.1039/c9cc02193k ◽

2019 ◽

Vol 55 (33) ◽

pp. 4845-4848 ◽

Cited By ~ 16

Author(s):

Liyong Chen ◽

Fengyang Yu ◽

Xiaoshuang Shen ◽

Chunying Duan

Keyword(s):

Electron Transfer ◽

Photocatalytic Activity ◽

Visible Light ◽

Transfer Process ◽

Visible Light Irradiation ◽

Light Absorption ◽

Co2 Conversion ◽

Electron Transfer Process ◽

Photo Induced Electron Transfer ◽

Photocatalytic Co2 Conversion

A N-CNDs/NH2-UiO-66 composite exhibits enhanced photocatalytic activity for CO2 conversion under visible light irradiation. This is attributed to a photo-induced electron transfer process from the light absorption antenna of the N-CNDs to the NH2-UiO-66 photocatalyst.

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

Chemical Science ◽

10.1039/c7sc03161k ◽

2018 ◽

Vol 9 (4) ◽

pp. 910-921 ◽

Cited By ~ 2

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.

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The central role of ligands in electron transfer from perovskite nanocrystals

MRS Advances ◽

10.1557/adv.2017.302 ◽

2017 ◽

Vol 2 (43) ◽

pp. 2327-2335 ◽

Cited By ~ 4

Author(s):

Alberto Privitera ◽

Marcello Righetto ◽

Renato Bozio ◽

Lorenzo Franco

Keyword(s):

Electron Transfer ◽

Transfer Process ◽

Photoinduced Electron Transfer ◽

Fullerene Derivative ◽

Mixed Solution ◽

Electron Transfer Process ◽

Perovskite Nanocrystals ◽

Pulsed Epr ◽

Photoinduced Processes

ABSTRACTThe nanoscale miniaturization of hybrid organic-inorganic perovskite has given rise to new functionalities, but the full understanding of the multifaceted properties of perovskite nanostructures is still incomplete. Using a combination of optical and magnetic resonance (EPR) spectroscopies, we focused our investigation on the photoinduced electron transfer process taking place in perovskite nanocrystals blended with the fullerene derivative PCBM. In particular we analyzed the different effect of two types of nanocrystal ligands, namely octylamine and oleylamine, on the photoinduced processes. The electron transfer process resulted in efficient fluorescence quenching in a mixed solution and in the formation of charges (PCBM anions) detected by EPR in the blends. Both the optical and EPR techniques revealed a stronger effect when the shorter ligand is present. Finally, pulsed EPR demonstrated the stabilization of the photogenerated charges in proximity of perovskite nanocrystals.

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