Insights into the effect of donor ability on photophysical properties of dihydroindeno[2,1-c]fluorene-based imide derivatives

Physical Chemistry Chemical Physics : PCCP
Guiying HeAndong Xia

Abstract

The photophysical properties of dihydroindeno[2,1-c]fluorene-based imide (DHIFI) derivatives were investigated by steady-state and time-resolved spectroscopy as well as quantum chemical calculations. The hybridized local excited and charge transfer state (HLCT) was introduced to interpret the intercrossing of localized excited (LE) and charge transfer (CT) states. The large extent of CT in the HLCT state of a molecule with a strong electron donor (dimethylaniline) at the terminal site results in strong interaction between the dipole moments of the excited state and polar solvents. Time-resolved spectroscopy results show the formation of a stabilized ICT state in several picoseconds, which results in fluorescence quenching and less possibility of intersystem crossing to the triplet state. In contrast, a molecule with a weak electron donor (benzene) displays less fluorescence quenching. The slowing down of geometry relaxation in the weak-electron-donor molecule increases the possibility of ISC to the triplet state from the unrelaxed HLCT state.

References

Jul 9, 2004·Biochimica Et Biophysica Acta·Ivo H M van StokkumRienk van Grondelle
Sep 7, 2006·Journal of the American Chemical Society·Ajit BhaskarTheodore Goodson
Jan 26, 2007·The Journal of Physical Chemistry. a·Guda Ramakrishna, Theodore Goodson
Dec 17, 2008·Chemistry : a European Journal·Chen LiKlaus Müllen
Dec 17, 2009·Organic Letters·Wei JiangZhaohui Wang
Nov 6, 2010·Chemistry : a European Journal·Damien ThirionOlivier Jeannin
Dec 14, 2011·Journal of Computational Chemistry·Tian Lu, Feiwu Chen
Aug 7, 2012·Chemistry : a European Journal·Ashok KeerthiSuresh Valiyaveettil
Oct 4, 2012·The Journal of Organic Chemistry·Lauren E PolanderSeth R Marder
Jan 29, 2014·Chemical Communications : Chem Comm·Meng LiChuan-Feng Chen
Dec 17, 2014·Journal of the American Chemical Society·Lidan WuHongmei Su
May 29, 2015·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Jiangpu HuAndong Xia
Jun 27, 2015·Physical Chemistry Chemical Physics : PCCP·Saran LongAndong Xia
Feb 16, 2016·Physical Chemistry Chemical Physics : PCCP·Guiying HeAndong Xia
Jun 9, 2016·Chemistry, an Asian Journal·Guiying HeAndong Xia
Dec 16, 2016·The Journal of Organic Chemistry·Charlotte F Gers-PantherThomas J J Müller

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BETA
NMR

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