posted on 2023-12-05, 16:11authored byGuo-Guo Weng, Kui Xu, Ting Hou, Xin-Da Huang, Ming-Feng Qin, Song-Song Bao, Li-Min Zheng
Lanthanide-based molecular materials showing efficient
circularly
polarized luminescence (CPL) activity with a high quantum yield are
attractive due to their potential applications in data storage, optical
sensors, and 3D displays. Herein we present an innovative method to
achieve enhanced CPL activity and a high quantum yield by doping a
chromophore ligand into a coordination polymer superhelix. A series
of homochiral europium(III) phosphonates with a helical morphology
were prepared with the molecular formula S-, R-[Eu(cyampH)3–3n(nempH)3n]·3H2O (S/R-Eu-n, n = 0–5%). The doping
of chromophore ligand S- or R-nempH2 into superhelices of S/R-Eu-0% not only turned on the
CPL activity with the dissymmetry factor |glum| on the order of 10–3 but also increased the quantum
yield by about 14-fold. This work may shed light on the development
of efficient CPL-active lanthanide-based coordination polymers for
applications.