正己烷中对二烷基氨基苯甲酸的分子内电荷转移双重荧光

在非极性溶剂正己烷中,观察到了系列对二烷基氨基苯甲酸的双重荧光.皮秒激光诱导时间分辨荧光和溶剂极性效应研究证实:该双重荧光系由于激发态分子内电荷转移过程形成的电荷转移态和局部激发态所发射.超快反应动力学研究表明:在非极性溶剂中,对二烷基氨基苯甲酸分子内电荷转移过程是由较低的反应活化能所致.

Intramolecular Charge Transfer Dual Fluorescence of p-Dialkylaminobenzoic Acids in n-Hexane

Dual fluorescence of a series of p-dialkylaminobenzoic acids in non-polar solvent n-hexane was observed. Picosecond time-resolved fluorescence and solvent polarity effect experiments demonstrated that the dual fluorescence is due to the excited state intramolecular charge transfer that produces the emissive charge transfer state in addition to the locally excited state. Dynamics data from the time-resolved fluorescence measurements indicated that the observation of the intramolecular charge transfer of p-dialkylaminobenzoic acids in nonpolar solvent is due to the low activation energy for the charge transfer process.