Team of academician Tian He of Huali and Professor Ma Xiang: pure organic polymer with near-infrared room temperature phosphorescence emission

The pure organic room temperature phosphorescent materials have the characteristics of long life, low toxicity, easy preparation and processing In recent years, it has become one of the research hotspots in the field of luminescent materials Tian He, academician of East China University of science and technology, and Professor Ma Yu's research team have made important progress in this field recently The title of "a facile way to obtain near infrared room temperature phosphorescent soft materials based on body dyes" in Chemical Science Online reported the research work of the team in the field of pure organic room temperature phosphorescent materials (chem SCI 2019, DOI: 10.1039 / c9sc05502a) Up to now, there are few reports about near-infrared room temperature phosphorescence, and most of them are organic complexes containing heavy metals Pure organic materials have been widely concerned because of their low toxicity and cost In order to reduce the non radiative transition of the excited triplet state of organic molecules, most of the pure organic room temperature phosphorescent systems are crystal luminescent, but the preparation process of crystal is complicated and not easy to repeat, so it is urgent to develop a convenient preparation method In this work, the team used a very simple and efficient free radical polymerization method to copolymerize the iodine containing BODIPY dye with acrylamide to obtain a series of amorphous polymer powders excited by visible light and emitting near-infrared room temperature phosphorescence The rigid structure of acrylamide polymer can not only weaken the vibration of luminescent molecules, but also isolate the external oxygen and other quenching factors to some extent, so as to reduce the non radiation transition In addition, by introducing a cross linking agent and a group containing four heavy hydrogen bonds in the polymerization reaction, the team also obtained near infrared room temperature phosphorescent gel with rapid self repairing function (source: chem SCI.) the research work was completed by Zhang Ting, a doctoral student, under the guidance of academician Tian He and Professor Ma Hui The research results are supported by NSFC basic science center project, Youqing project, Shanghai dawn plan and other projects.