Physics

Nanotechnology

Stereochemistry

Crystallography

Crystal structure

Optics

Astronomy

Phosphorescent organic light-emitting diode

Physical chemistry

Phosphorescence

Supramolecular assembly

Quantum yield

Gamma-ray burst

Aqueous solution

Chemistry

Materials science

Afterglow

Intramolecular force

Photoluminescence

Supramolecular chemistry

Optoelectronics

Photochemistry

Fluorescence

Advanced Materials

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.

Supramolecular Pins with Ultralong Efficient Phosphorescence