Enacting Two-Electron Transfer from a Double-Triplet State of Intramolecular Singlet Fission

被引：51

作者：

Kim, Hyungjun ^{[1
]}

Keller, Bradley ^{[1
]}

Ho-Wu, Rosina ^{[1
]}

Abeyasinghe, Neranga ^{[1
,2
]}

Vazquez, Ricardo J. ^{[1
]}

Goodson, Theodore, III ^{[1
]}

Zimmerman, Paul M. ^{[1
]}

机构：

[1] Univ Michigan, Dept Chem, Ann Arbor, MI 48109 USA

[2] Univ Colombo, Dept Chem, Colombo, Sri Lanka

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2018年 / 140卷 / 25期

关键词：

EXCITON-FISSION; PENTACENE; DYNAMICS;

D O I：

10.1021/jacs.8b01884

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A simulation-led strategy enacts two electron transfer between an intramolecular singlet fission chromophore (tetracyanomethylene quinoidal bithiopehene with beta,beta'-solubilizing groups) and multielectron acceptor (anthraquinone). The thermodynamic plausibility of multielectron transfer from a double-triplet state and the absorption spectra of electron transfer (ET) products were predicted using quantum chemical simulations. These predictions are consistent with experimental observations of reduced lifetimes in time-resolved fluorescence spectroscopy, changes in transmission profile, and appearance of new absorption bands in transient absorption spectroscopy, all of which support multi-ET in the QOT2/AQ mixture. The analysis suggests 2ET is favored over 1ET by a 2.5:1 ratio.

引用

页码：7760 / 7763

页数：4

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