Studies on a Vinyl Ruthenium-Modified Squaraine Dye: Multiple Visible/Near-Infrared Absorbance Switching through Dye- and Substituent-Based Redox Processes
作者:Jing Chen、Rainer F. Winter
DOI:10.1002/chem.201200800
日期:2012.8.20
709 nm. Although organic dyes 6, 7, and 8 fluoresce, no room‐temperature emission is observed for 1. The radical cations and anions of 6, 7, 8, and 1 as well as the doubly oxidized dications have been studied by IR and UV/Vis/NIR spectroelectrochemistry, and the −/0/+/2+ redox sequences were found to be reversible in each case. Our results indicate that the 12−/−/0/+/2+ redox system constitutes a polyelectrochromic
双(乙烯基钌)修饰的方酸染料1是通过用双(乙炔基)取代的方酸8处理[RuHCl(CO)(P i Pr 3)2 ]合成的。光谱和对电化学测定1和它的有机前体6 - 8进行研究的乙烯基钌的效果“取代基”,特别是相对于(聚)电致变色。乙烯基钌部分的附着赋予金属-有机方酸1额外的两个氧化波,并且相对于其有机前体,其前两个氧化电位降低了约300 mV。南瓜6,7,8,和1强烈吸收在648,663,656,或709纳米。虽然有机染料6,7,和8发出荧光,没有室温发射观察1。自由基阳离子和阴离子的6,7,8,和1以及在双氧化双阳离子进行了研究由IR和UV /可见/近红外光谱电化学和- / 0 / + / 2 +的氧化还原中发现的序列是在每种情况下都是可逆的。我们的结果表明1 2 − / − / 0 / + / 2+氧化还原系统构成了一个多电致变色开关,在该开关中,可逆或可见光或近红外范围内的吸收被可逆地