Premium
Supramolecular Pins with Ultralong Efficient Phosphorescence
Author(s) -
Ma XinKun,
Zhang Wei,
Liu Zhixue,
Zhang Haoyang,
Zhang Bing,
Liu Yu
Publication year - 2021
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.202007476
Subject(s) - phosphorescence , supramolecular chemistry , quantum yield , materials science , photoluminescence , phosphorescent organic light emitting diode , photochemistry , supramolecular assembly , intramolecular force , fluorescence , aqueous solution , afterglow , crystallography , chemistry , optoelectronics , stereochemistry , optics , crystal structure , physics , gamma ray burst , astronomy
Constructing ultralong organic phosphorescent materials possessing a high quantum yield is challenging. Herein, assemblies of purely organic supramolecular pins composed of alkyl‐bridged phenylpyridinium salts and cucurbit[8]uril (CB[8]) are reported. Different from “one host with two guests” and “head‐to‐tail” binding, the binding formation of supramolecular pins is “one host with one guest” and “head‐to‐head,” which overcomes electrostatic repulsion and promotes intramolecular charge transfer. The supramolecular pin 1/CB[8] displays afterglow with high phosphorescence quantum yield (99.38%) after incorporation into a rigid matrix, which is the highest yield reported to date for phosphorescent materials. Moreover, multicolor photoluminescence can be obtained by different excitation wavelengths and ratios of host to guest. Owing to the redshift of the absorption, the supramolecular pins are applied for targeted phosphorescence imaging of mitochondria. This work will provide a reasonable supramolecular strategy to achieve redshifted and efficient phosphorescence both in the solid state and in aqueous solution.