Department of Chemistry, The Ohio State University, Columbus, Ohio 43210, USA.
Chem Commun (Camb). 2010 Sep 28;46(36):6759-61. doi: 10.1039/c0cc02571b. Epub 2010 Aug 17.
The extended pi-delocalization of dppn (benzo[i]dipyrido[3,2-a:2,3-c]phenazine) results in a (3)pipi* state as the lowest triplet excited state in Os(bpy)(2)(dppn) (bpy = 2,2'-bipyridine), which generates a (1)O(2) quantum yield of 0.42. Together with its (3)MLCT absorption, this new osmium complex shows efficient DNA cleavage under irradiation of lambda(irr) > or = 645 nm.
dppn（苯并[i]二吡啶并[3,2-a:2',3'-c]吩嗪）的扩展π离域导致其（3）pipi*态成为[Os(bpy)(2)(dppn)]²⁺（bpy=2,2'-联吡啶）中最低的三重态激发态，从而产生 0.42 的（1）O₂量子产率。与（3）MLCT 吸收一起，该新型锇配合物在照射λ（irr）>或=645nm 下显示出有效的 DNA 断裂活性。
