动态吸收光谱研究6-硝基-1’,3’,3’-三甲基吲哚啉螺苯并吡喃的光致变色性质

Dynamic Absorption Spectral Research of the Characteristic Photochromism of 1'3'3'-Trimethyl-6-nitro-indolinospiropyran

利用自行搭建的线阵CCD连续直读紫外-可见吸收光谱仪,研究了合成的螺吡喃类化合物6-硝基-1’,3’,3’-三甲基吲哚啉螺苯并吡喃的光致变色反应。通过研究在光照后闭环体开环与光照后开环体的闭环两个过程的光谱变化,讨论了合成产物的光致变色性质。证明该化合物的开环反应是一个快反应,在光照下的变色过程则是一个振荡平衡过程,而开环体的退色反应是一级动力学过程。

The photochromic features of 1 ＇ 3 ＇ 3-trimethyl-6-nitro-indolinospiropyran were characterized by a non-scanning UV-Vis spectrometer based on linear CCD. Focusing on the absorption spectrum changes about the ring- open and ring-close process, the photochromic proceeding has been discussed. The ring-open reaction is a fast reaction, and the color reaction proceeding is the process from oscillation to equilibrium positions. The fading reaction is a first-order kinetic process.