论文部分内容阅读
报导了一种吲哚啉螺吡喃（SP）在丙酮溶液中热致变色平衡常数的新测定方法．通过分别检测紫外光照射SP后生成有色体的褪色过程和避光条件下其开环异构体与Cu（Ⅱ）的配合物形成过程，求得闭环无色体的开环速度常数kf和开环有色体的闭环褪色速度常数（kr）分别为4．94×10－4s－1和9．8×10－2s－1．利用Ke＝kf／kr，可求得Ke为5．0×10－3．此方法有助于解决Flannery等人方法中对不同溶剂ε估值所带来误差的问题．
A new method for the determination of the thermochromic equilibrium constant of indoline spiropyran (SP) in acetone solution was reported. The open-loop rate constants kf and kf of the closed-ring chromophore were determined by detecting the fading of the chromophores and the formation of the complexes of the ring-opened isomers with Cu (II) under UV-light irradiation, respectively The closed-loop fading rate constants (kr) of the ring color bodies are 4.94 × 10 -4 s -1 and 9.8 × 10 -2 s -1, respectively. Using Ke = kf / kr, Ke can be obtained as 5.0 × 10-3. This method helps to solve the problem of error caused by the method of Flannery et al.