toxicity. The photo-induced cell death is via generation of oxidative stress by reactive oxygen species. Schiff base copper(II) complex of dipyridophenazine shows remarkable photocytotoxic effect in HeLa cells in visible light (400-700 nm) with reduced dark toxicity via apoptotic pathway. The complex intercalatively binds to ct-DNA, exhibits moderate chemical nuclease activity but excellent DNA photocleavage
水杨醛-
组胺席夫碱(HL)和
吡啶基
配体的三元
铜(II)配合物,即。[Cu(bpy)(L)](ClO 4)(1)和[Cu(dppz)(L)](ClO 4)(2),其中bpy是2,2 \(^ \ prime} \) -合成联
吡啶(1中)和dppz为二
吡啶[3,2-a:2 \(^ \ prime} \),3 \(^ \ prime} \)- c]
吩嗪(2中)并研究了它们的DNA结合,光激活的DNA裂解活性和光细胞毒性。1:1电解质单电子顺磁性络合物在
DMF水溶液(1:1 v / v)中显示670 nm附近的d - d带。配合物的晶体结构图1显示了
金属以CuN 4 O扭曲的方
金字塔形几何形状。复合物2插入小牛胸腺(ct)DNA,其结合常数(K b)为〜10 5 M -1。它在647 nm的红光下表现出中等的
化学核酸酶活性,但具有出色的DNA光裂解活性,形成了•OH自由基。这表明在人宫颈癌细胞