Affiliation:
1. State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun 130012 China
Abstract
AbstractEnhancing the dissymmetry factor (glum) is a crucial issue in developing circularly polarized luminescence (CPL) materials. Herein, based on supramolecular self‐assembly of diethyl l‐glutamate‐cyanodiarylethene (L‐GC) in mixed solution of EtOH‐H2O with different water fraction, enhanced circularly polarized emission from pulsating nanotubules is realized. In the mixture of ethanol and water (30/70, v/v), L‐GC self‐assembles into roll‐up‐type dense nanotubes and shows l‐CPL. Remarkably, by increasing the water fraction to 80% and 90%, the diameter of the roll‐up nanotubes increases and the dissymmetry factor of the nanotubes is significantly enhanced from 6.9 × 10−3 (dense nanotubes) to 3.7 × 10−2 (loose nanotubes) because of the enhanced intermolecular interactions and more ordered supramolecular stacking when increasing the water fraction. An efficient way is provided here to realize the increase of the dissymmetry factor by only changing the composition of solvents.
Funder
Program for Jilin University Science and Technology Innovative Research Team
National Natural Science Foundation of China
Subject
Materials Chemistry,Polymers and Plastics,Organic Chemistry