ma8b02305_si_001.doc (1.84 MB)
Download fileCombining Chiral Helical Polymer with Achiral Luminophores for Generating Full-Color, On–Off, and Switchable Circularly Polarized Luminescence
journal contribution
posted on 2018-12-27, 13:22 authored by Biao Zhao, Kai Pan, Jianping DengCircularly polarized luminescent
(CPL) materials are currently
drawing ever-increasing interest. This contribution reports the first
success in simply combining chiral helical substituted polyacetylenes
(HSPAs) with achiral luminophores to fabricate CPL materials demonstrating
a high dissymmetry factor (glum) up to
10–1, despite neither covalent nor noncovalent interactions
occurring between the two components. Circularly polarized scattering
and fluorescence-selective absorption mechanisms are proposed for
the generation of CPL, and a “matching rule” is further
established for selecting chiral polymers and achiral luminophores
for the purpose. Taking advantage of the circularly polarized scattering
effect, full-color tunable CPL materials are prepared from the combination
of achiral fluorescent dyes and chiral HSPAs. Following the fluorescence-selective
absorption mechanism, functional composite films with on–off
and switchable CPL performance are fabricated. Also, remarkably, the glum value in the prepared materials can reach
up to +0.323. The present study provides a simple, powerful, and universal
strategy for constructing novel CPL materials.