硫代草酸铁(Ⅲ)配合物的光化学

PHOTOCHEMISTRY OF THIOOXALATO-(O,S) FERRIC COMPLEX

草酸铁(Ⅲ)钾是光敏感的,目前仍是一种常用的化学光量计。为了比较它与草酸根中的一个氧原子被硫取代生成的不对称配位体与铁(Ⅲ)形成的配合物对光的稳定性,我们研究了硫代草酸铁(Ⅲ)配合物的光化学。实验表明硫代草酸铁(Ⅲ)配合物也是光敏感的,但与草酸铁(Ⅲ)钾比较,在酸性溶液中会发生酸性水解。本文报导在恒离子强度0.1mol·1^(-1)(KCl),pH=4.05的Clark-Lubs缓冲溶液中的光化学。

The thiooxalato-(o,s) ferric complex is photosensitive. The irradiation of the complex, by using 258nm, 458nm, 512nm and CoSO4 and CuSO4 solution filter, respectively, has been investigated at pH = 4.05 in Clark-Lubs buffer solution in the paper, the photodecomposition reactions are pseudo first order reaction and the pseudo first order rate constants were determined. The quantum yields for ferro formation are reported. The kinetic equation of ferro formation was derived from the reaction mechanism, the theory is agreement with the experimental results.