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1,3-Diphenylisobenzofuran: a Model Chromophore for Singlet Fission

SYSNO ASEP	0479670
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	1,3-Diphenylisobenzofuran: a Model Chromophore for Singlet Fission
Author(s)	Johnson, J. C. (US) Michl, Josef (UOCHB-X)_{RID, ORCID}
Article number	80
Source Title	Topics in Current Chemistry - ISSN 2365-0869 Roč. 375, č. 5 (2017)
Number of pages	29 s.
Language	eng - English
Country	CH - Switzerland
Keywords	1,3-diphenylisobenzofuran ; photophysics ; solar energy ; singlet fission ; covalent dimers
Subject RIV	CF - Physical ; Theoretical Chemistry
OECD category	Physical chemistry
R&D Projects	GA15-19143S GA ČR - Czech Science Foundation (CSF)
Institutional support	UOCHB-X - RVO:61388963
UT WOS	000411067500007
EID SCOPUS	85029442370
DOI	10.1007/s41061-017-0162-3
Annotation	In this review we first provide an introductory description of the singlet fission phenomenon and then describe the ground and electronically excited states of the parent 1,3-diphenylisobenzofuran chromophore (1) and about a dozen of its derivatives. A discussion of singlet fission in thin polycrystalline layers of these materials follows. The highest quantum yield of triplet formation by singlet fission, 200% at 80 K, is found in one of the two known crystal modification of the parent. In the other modification and in many derivatives, excimer formation competes successfully and triplet yields are low. A description of solution photophysics of covalent dimers is described in the next section. Triplet yields are very low, but interesting phenomena are uncovered. One is an observation of a separated-charges (charge-transfer) intermediate in highly polar solvents. The other is an observation of excitation isomerism in both singlet and triplet states, where in one isomer the excitation is delocalized over both halves of the covalent dimer, whereas in the other it is localized on one of the halves. In the last section we present the operation of a simple device illustrating the use of triplets generated by singlet fission for charge separation.
Workplace	Institute of Organic Chemistry and Biochemistry
Contact	asep@uochb.cas.cz ; Kateřina Šperková, Tel.: 232 002 584 ; Viktorie Chládková, Tel.: 232 002 434
Year of Publishing	2018

Number of the records: 1