Dual-Action Ru(II) Complexes with Bulky π-Expansive Ligands: Phototoxicity without DNA Intercalation
作者:Nicholas P. Toupin、Sandeep Nadella、Sean J. Steinke、Claudia Turro、Jeremy J. Kodanko
DOI:10.1021/acs.inorgchem.9b03585
日期:2020.3.16
characterization of Ru(II) complexes containing π-expansive ligands derived from dimethylbenzo[i]dipyrido[3,2-a:2',3'-c]phenazine (Me2dppn) adorned with flanking aryl substituents. Late-stage Suzuki couplings produced Me2dppn ligands substituted at the 10 and 15 positions with phenyl (5), 2,4-dimethylphenyl (6), and 2,4-dimethoxyphenyl (7) groups. Complexes of the general formula [Ru(tpy)(L)(py)](PF6)2
我们报告合成的Ru(II)配合物,其中包含衍生自二甲基苯并[i] dipyrido [3,2-a:2',3'-c]吩嗪(Me2dppn)的π-膨胀配体并配以侧基芳基取代基。后期的Suzuki偶联产生的Me2dppn配体在10和15位上被苯基(5),2,4-二甲基苯基(6)和2,4-二甲氧基苯基(7)取代。通式为[Ru(tpy)(L)(py)](PF6)2(8-10)的配合物(其中L = 4-7)已表征并显示具有光化学疗法(PCT)和光动力疗法(PDT)双重)的行为。单齿吡啶从8-10光解离的量子产率比母体复合物[Ru(tpy)(Me2dppn)(py)](PF6)2(1)高约3倍,而单线态氧(1O2)的量子产率产量比1.低约10%。瞬态吸收光谱表明,8-10具有长的激发态寿命(τ= 46-50μs),这与通过种群有效产生1O2以及随后以配体为中心的3ππ*激发态的衰变相一致。相对于1,复合