Fluorescence-Selective Absorption and Circularly Polarized Fluorescence Energy Transfer Assist the Generation of Multicolor Circularly Polarized Luminescence in Chiral Helical Polyacetylene-Based Janus Nanofibers

Yujie Ji; Kai Yang; Biao Zhao; Kai Pan; Jianping Deng

doi:10.1021/acsmacrolett.4c00085

Fluorescence-Selective Absorption and Circularly Polarized Fluorescence Energy Transfer Assist the Generation of Multicolor Circularly Polarized Luminescence in Chiral Helical Polyacetylene-Based Janus Nanofibers

ACS Macro Lett. 2024 May 16:673-680. doi: 10.1021/acsmacrolett.4c00085. Online ahead of print.

Authors

Yujie Ji^{1

2}, Kai Yang^{1

3

2}, Biao Zhao², Kai Pan², Jianping Deng^{1

2}

Affiliations

¹ State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
² College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
³ State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.

PMID: 38755117
DOI: 10.1021/acsmacrolett.4c00085

Abstract

Chiroptical nanomaterials with circularly polarized luminescence (CPL) performance have aroused increasing attention. Herein, multicolor CPL-active Janus nanofibers are prepared through a simple parallel electrospinning method using chiral helical polyacetylenes as the chiral source and achiral fluorophores as the fluorescent source. Interestingly, despite a direct spatial isolation between the chiral component and the fluorescent component, blue and green CPL emissions can still be obtained due to the fluorescence-selective absorption behavior of chiral helical polyacetylenes, with a satisfactory dissymmetric factor (g_lum) of 2 × 10^-2 and 2.5 × 10^-3, respectively. Moreover, by taking advantage of the circular polarization fluorescence energy transfer process, red CPL emission is further achieved using the obtained blue and green CPL as energy donors and the achiral red fluorophore as an energy acceptor. The present work offers a facile approach to prepare multilevel-structured chiroptical materials with promising application potentials in a flexible photoelectric device.