Fast emission color switching of circularly polarized luminescence in platinum(ii) liquid crystalline co-assembly

Abstract

Developing stimuli-responsive circularly polarized luminescence (CPL) materials that feature fast emission color switching for advanced information encryption presents a scientifically significant yet formidable challenge. Herein, we construct a supramolecular co-assembly system demonstrating transiently responsive CPL emission color switching, enabling mechanically-modulated information encryption. Combining a highly luminescent Pt(II) liquid crystal (Pt8) with the anchored binaphthyl inducers (R/S-M) forms chiral co-assemblies (R/S-M)0.03-(Pt8)0.97, which assemble into twisted nanobelts (180 °C) and helical nanofibers (260 °C) exhibiting green (λem = 545 nm, gem = 0.038) and red CPL (λem = 640 nm, gem = 0.133), respectively. Notably, mechanical grinding transforms the 180 °C-annealed (R/S-M)0.03-(Pt8)0.97 into nanoparticles, resulting in a fast dynamic switching of CPL emission color from green to orange-red (λem: 545 → 625 nm, gem: 0.038 → 0.058). Reheating the grinding films (R/S-M)0.03-(Pt8)0.97 to 180 °C restores the initial green CPL of the nanobelts. Based on the fast CPL emission color switching, we demonstrate the applications of these supramolecular chiral co-assemblies for mechanically-modulated information encryption.

Graphical abstract: Fast emission color switching of circularly polarized luminescence in platinum(ii) liquid crystalline co-assembly

Supplementary files

Article information

Article type
Edge Article
Submitted
25 Mar 2025
Accepted
13 May 2025
First published
13 May 2025
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2025, Advance Article

Fast emission color switching of circularly polarized luminescence in platinum(II) liquid crystalline co-assembly

G. Zou, Q. Li, Z. Jiang, W. Gao and Y. Cheng, Chem. Sci., 2025, Advance Article , DOI: 10.1039/D5SC02285A

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