Interfacial Electron Transfer Dynamics of Two Newly Synthesized Catecholate Bound Ru
<sup>II</sup>
Polypyridyl‐Based Sensitizers on TiO
<sub>2</sub>
Nanoparticle Surface – A Femtosecond Pump Probe Spectroscopic Study
作者:Tanmay Banerjee、Sachin Rawalekar、Amitava Das、Hirendra N. Ghosh
DOI:10.1002/ejic.201100411
日期:2011.9
and TiO2 nanoparticles. Femtosecond visible transient absorption spectroscopy has been employed to study interfacialelectrontransfer (IET) dynamics in the dye–nanoparticle systems to explore the influence of the secondary electron-donating groups on IET dynamics. Electron injection into the conduction band of nanoparticulate TiO2 has been confirmed by detection of the conduction band electrons in
两种新的儿茶酚结合 RuII-聚吡啶基敏化剂,(2,2'-联吡啶)乙基 3-(4-羟基苯基)-2-[(4'-甲基-2,2'-联吡啶基-4-羰基)氨基]丙酸盐}4-[2-(4'-methyl-2,2'-bipyridinyl-4-yl)vinyl]benzo-1,2-diol)}钌(II)六氟磷酸盐(5)和[(2, 2'-联吡啶)-(4-2,2'-联吡啶-4-基-苯酚)-(4-2-(4'-甲基-2,2'-联吡啶-4-基)乙烯基}苯-合成并表征了具有二次给电子基团(分别为酪氨酸和苯酚)的 1,2-二醇)] 六氟磷酸钌 (II) (6)。稳态光吸收和发射研究证实了敏化剂和二氧化钛纳米颗粒之间的强耦合。飞秒可见瞬态吸收光谱已被用于研究染料-纳米粒子系统中的界面电子转移 (IET) 动力学,以探索二次给电子基团对 IET 动力学的影响。电子注入纳米颗粒 TiO2 的导带已通过检测 TiO2 中的导带电子
Competitive binding of Ba
<sup>2+</sup>
and Sr
<sup>2+</sup>
to 18‐Crown‐6 in a Receptor with a 1‐Methoxyanthraquinone Analogue as the Other Binding Site
作者:Tanmay Banerjee、Moorthy Suresh、Hirendra N. Ghosh、Amitava Das
DOI:10.1002/ejic.201100472
日期:2011.10
its affinity towards alkaline earth metalions from one of our previous reports. A new RuII-polypyridyl complex with two probable binding sites for metalions has been synthesised to which Ca2+, Sr2+ and Ba2+ were found to bind selectively over all other alkali, alkaline earth, transition and lanthanide metalions. Studies also confirmed binding of these metalions solely to the 18-crown-6 and not to