摘要
本文研究了中-四(对三甲胺基苯基)金属卟啉(MeTPI,Me=H_2,Zn(Ⅱ),Cu(Ⅱ),Ni(Ⅱ),Mn(Ⅲ),Co(Ⅲ))光敏化还原甲基紫精(MVI_2)反应,用动力学方程参数a,诱导时间t_i和初始反应速率V_0来衡量光敏剂的优劣.同时讨论了不同的取代基以及不同的轴向配体对光敏剂光敏性的影响.结果表明:Zn(Ⅱ)TPI的光敏性较好;含氮芳香有机碱对光敏剂起“增敏”作用,并且通过引入带有正电荷的轴向配体,使“增敏”效果更加显著,同时发现,脂肪胺起“降敏”作用.
The photosensitized reduction reaction of methylviologen was investigated by tetrakis [ (4 - trimethylamino) phenyl ] metalloporphyrins [ MeTPI, Me = H2, Zn ( II ) , Ni ( II ) , Cu ( II ) , Mn( III ), Co(III) ] .The kinetic parameter a , inductive time ti and initial rate v0 in photosensitized reaction were applied to measure the photosensitivity of photosensitizers. Both substituting groups and axial coordinations of metalloporphyrin can exert a great influence on the photosensitivity of photosensitizers. The experimental results domonstrated that (1) zinc porphyrin is the best photosensitizers in the same series of porphyrins and metalloporphyrins; (2) the aromatic organic bases can increase the photosensitivity through axial ligation, on the contrary, the aliphatic amines can decrease the photosensitivity; (3) the aromatic organic bases with positive charge can increase the photosensitivity considerably.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1996年第4期385-391,共7页
Acta Chimica Sinica
基金
国家自然科学基金
南京大学配位化学国家重点实验室资助课题
