Design and Development of Functionalized Cyclometalated Ruthenium Chromophores for Light-Harvesting Applications
作者:Kiyoshi C. D. Robson、Bryan D. Koivisto、Aswani Yella、Barbora Sporinova、Mohammad K. Nazeeruddin、Thomas Baumgartner、Michael Grätzel、Curtis P. Berlinguette
DOI:10.1021/ic200011m
日期:2011.6.20
character of the tridentate chelate distal to the TPA-substituted ligand (e.g., R2 = −H, −CO2Me, −CO2H); and (iii) position of the organometallic bond about the Ru(II) center. UV–vis spectra reveal intense and broad absorption bands arising from a collection of metal-to-ligand charge-transfer (MLCT) and TPA-based intraligand charge-transfer (ILCT) transitions that, in certain cases, extend beyond 800
报道了一组带有末端三苯胺(TPA)取代基的不对称双三齿环金属化Ru(II)配合物的合成和电化学光谱性质。这些配合物包含无机和有机染料共有的结构设计元素,在染料敏化太阳能电池(DSSC)中表现出优异的功率转换效率,这些配合物被广泛地配制为[Ru II(L-2,5'-thiophene-TPA) -R 1)(LR 2)] + [L =三齿螯合配体(例如2,2':6',2''-吡啶(tpy); 1,3-二(吡啶-2-基)的去质子化形式)苯(Hdpb)或6-苯基-2,2'-联吡啶(Hpbpy)); R 1 = -H,-Me,-OMe; R 2 = -H,-CO2 Me,-CO 2 H]。以下结构属性进行了系统的修改,以便在系列:(ⅰ)供电子性的取代基终端(例如,R的字符1放置= -H,-Me,-OMe)对位为“L-2,5的胺'-噻吩-TPA-R 1 '配体框架;(ii)在TPA-取代的配体远端的三齿螯合物的吸电子特性(例如,R