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Photoinduced intramolecular charge-transfer state in thiophene-π-conjugated donor-acceptor molecules.
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2008 (English)In: Journal of Molecular Structure, ISSN 0022-2860, E-ISSN 1872-8014, Vol. 876, no 1-3, 102-109 p.Article in journal (Refereed) Published
Abstract [en]

Novel thiophene-π-conjugated donor-acceptor mols., 5-[2-(1,2,2,4-tetramethyl-1,2,3,4-tetrahydroquinolin-6-yl)-vinyl]-thiophene-2-carbaldehyde (QTC) and (1-cyano-2-{5-[2-(1,2,2,4-tetramethyl-1,2,3,4-tetrahydroquinolin-6-yl)-vinyl]-thiophen-2-yl}-vinyl)-phosphonic acid di-Et ester (QTCP), were designed and synthesized. Combined exptl. and theor. methods were performed to investigate the photoinduced intramol. charge-transfer (ICT) processes of these compds. Steady-state absorption and fluorescence measurements in different solvents indicate the photoinduced ICT characters of QTC and QTCP. Solvent dependency of the large Stokes shifts and high dipole moment of the excited state also support the charge-transfer character of the excited state. Theor. calcns. based on time-dependent d. functional theory (TDDFT) method were performed to investigate ICT states of these compds. The results reveal that the excited states have adopted a distortion of the C=C double bond between the donor moiety and the thiophene-π-bridge. [on SciFinder(R)]

Place, publisher, year, edition, pages
2008. Vol. 876, no 1-3, 102-109 p.
Keyword [en]
photoinduced intramol charge transfer thiophene conjugated donor acceptor mol
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-218495DOI: 10.1016/j.molstruc.2007.05.045OAI: oai:DiVA.org:uu-218495DiVA: diva2:695793

CAPLUS AN 2008:340562(Journal)

Available from: 2014-02-12 Created: 2014-02-12 Last updated: 2014-02-12

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Tian, Haining
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