Issue 9, 2022 - Breakthrough in the research of full-color water-soluble polymer long afterglow materials

Recently, the international top journal Science Progress published online the breakthroughs
made by Academician Huang Wei of the Frontier Science Center for Flexible Electronics of Northwestern Polytechnical University and Professor Chen Runfeng and Professor Tao Ye of the Institute of Information Materials and Nanotechnology of Nanjing University of Posts and Telecommunications in the field of full-color water-soluble polymer long afterglow materials.

Due to its unique photophysical properties, organic long afterglow materials have a wide range of application prospects
in the fields of anti-counterfeiting encryption, afterglow illumination and bioimaging.
However, how to construct water-soluble polymer long-afterglow materials with ultra-long life and on-demand afterglow color is still a major challenge
in this field.

In view of this problem, Academician Huang Wei et al.
proposed the use of hydrogen bond-induced condensed matter structure stabilization trilet exciton strategy to construct efficient and ultra-long-life blue light water-soluble polymer long afterglow materials, and by using the dynamic trilink-singlet phosphorescence photosensitization energy transfer strategy, the prepared blue light water-soluble phosphorescent polymer was used as the energy donor and the commercial fluorescent molecule with adjustable color as the energy acceptor, and the donor and acceptor were physically blended in a certain proportion.
Full-color polymer long afterglow materials from blue to red or even white light luminescence have been developed, with a lifetime and efficiency of up to 4.
2 seconds and 36%,
respectively.

Researchers can use it as a colorful advanced security ink, and use inkjet printing technology to produce patterns rich in color, image and text information
.