取代苄叉亚胺类化合物溶液电子光谱的研究

研究了二甲氨基苄叉亚胺类化合物溶液的电子光谱。结果表明一端为电子给体另一端为电子受体的共轭型取代苄叉对硝基苯胺3,在基态下发生了分子内电荷转移,其跃迁吸收波长比化合物1,2(315 nm)红移90 nm。以乙撑基联接的非共轭型苄叉亚胺奥化合物4,5,6未观察到基态时的电荷转移现象,但在激发条件下可明显的发生分子内的电荷转移而使荧光强度大大减弱。MMA等对1的荧光有明显的猝灭作用,表明其间发生了电荷转移。丙烯酸则因会引起西佛碱的水解,而使荧光减弱。

THE ELECTRONIC SPECTRA OF p-SUBSTITUTED BENZYLIDENE IMINE IN SOLUTION

In this work, the electronic spectra of dimethylamino-benzylideneimine were investigated.The result shows that charge transfer from a donor located at the end of molecule to an acceptor at the other end of the conjugated molecule 3 in theground state occurs, the absorption wave-length of 3 shifts from 315 nm to 405 nm comparing with 1.No charge transfer for compounds 4, 5, 6 are observed in the ground state, but the electron transfer occurs obviously in the excited state, this make the intensity of fluorescence decrease strongly.The fluorescence quenching of compound 1 by MMA also is observed, it indicates that an electron transfer occursbetween 1 and MMA.The fluorescence of 1 decreases after addition of acrylic acid owing to the hydrolysis of Schiff bases.