Novel quadridentate salen type triple-decker sandwich ytterbium complexes with near infrared luminescence†‡
Abstract
Unique quadridentate salen type triple-decker dinuclear sandwich ytterbium complex [Yb2L3(CH3OH)]·0.5H2O (1) and triple-decker trinuclear sandwich ytterbium complex [Yb3L3(CH3OH)2(NO3)3]·CH3OH·5H2O (2) are isolated from the reactions of Yb(OAc)3·4H2O and Yb(NO3)3·6H2O with H2L, respectively (H2L = N,N′-bis(salicylidene)-1,2-(phenylene-diamine)). Complex 2 could be harvested from the addition of complex 1 and Yb(NO3)3·6H2O. Near infrared (NIR) lanthanide luminescence and the lifetime of complexes 1 and 2 are conducted and described.