Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2011 Jan;78(1):463-8. doi: 10.1016/j.saa.2010.11.010. Epub 2010 Nov 23.
A donor acceptor substituted aromatic system 5-(4-dimethylamino-phenyl)-penta-2,4-dienoic acid (DMAPPDA) has been synthesized and its spectral properties have been explored on the basis of steady state absorption and fluorescence spectroscopy. Spectral features point largely towards a possible occurrence of photoinduced intramolecular charge transfer process from the donor NMe2 group to the acceptor acid group. Solvent dependency of the large Stokes' shifted emission band and the calculated large excited state dipole moment support the polar character of the charge transfer excited state. Quantum yield calculations and effect of addition of acid and base on the steady state spectra were also performed to further scrutinize the excited state CT character.
已经合成了供体-受体取代的芳香体系 5-(4-二甲基氨基-苯基)-戊-2,4-二烯酸（DMAPPDA），并基于稳态吸收和荧光光谱研究了其光谱性质。光谱特征主要表明可能发生从供体 NMe2 基团到受体酸基团的光诱导分子内电荷转移过程。大斯托克斯位移发射带的溶剂依赖性和计算出的大激发态偶极矩支持电荷转移激发态的极性。还进行了量子产率计算以及酸和碱对稳态光谱的影响，以进一步研究激发态 CT 特性。
