Premium
Circularly Polarized Luminescence from Solvent‐Free Chiral Organic π‐Liquids
Author(s) -
Bai Xue,
Sun Yimeng,
Jiang Yuqian,
Zhao Guangjiu,
Jiang Jian,
Yuan Chenhuan,
Liu Minghua
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202013550
Subject(s) - anthracene , circular dichroism , chirality (physics) , luminescence , pyrene , enantiomer , alkyl , photochemistry , fluorescence , chemistry , solvent , excimer , materials science , crystallography , organic chemistry , optoelectronics , optics , physics , quantum mechanics , nambu–jona lasinio model , quark , chiral symmetry breaking
Abstract The solvent‐free organic π‐liquids have been attracting increasing attentions owing to the inherent optoelectronic properties accompanied by the advantages of non‐volatility and high processability. Herein, we reported a series of naphthalene derivatives substituted with chiral branched alkyl chains, which are present as liquids ( Nap1 – 3 ) or solid ( Nap4 ) at room temperature, depending on the substitution positions. Circular dichroism (CD) and circularly polarized luminescence (CPL) were only observed for enantiomeric Nap2 (2,3‐substituted) liquid. It is suggested that the chiral aggregation in the π‐liquid leads to the CD signal and the chiral excimer resulting in the CPL performance. When achiral anthracene or pyrene was dissolved in Nap2 , the π‐liquid could serve as chirality and energy transfer media in which both CD and CPL emerged from the achiral anthracene. A CPL dissymmetry factor (|g lum |) of anthracene reached to 5.2×10 −2 when dissolved in chiral Nap2 liquid, which is nearly two orders of magnitude higher than that of the pure Nap2 π‐liquid.