Angelw VIP paper: Professor Ma Hui, academician Tian He of East China University of science and technology, has prepared pure organic amorphous heavy atom free room temperature phosphorescent polymer materials for the first time

Pure organic room temperature phosphorescent materials are expected to be widely used in photoelectric materials and biochemical fields due to their long-life luminescence, diversified design and convenient preparation The research team of Tian He, academician of East China University of science and technology and Professor Ma Yu has made a breakthrough in this field Recently, the German Journal of Applied Chemistry reported the research work of the team in the field of pure organic room temperature phosphorescent materials (angel Chem Int ed., 2018, 57, 10854) up to now, most of the reported room temperature phosphorescent materials are inorganic or organic complexes containing precious metals, which are often expensive and toxic, so it is difficult to realize large-scale industrial preparation, so it is urgent to develop pure organic room temperature phosphorescent materials The triplet excited states of pure organic molecules are easily inactivated by non radiation processes such as thermodynamic vibration or contact with quenching factors (such as oxygen), so it is difficult for pure organic systems to produce room temperature phosphorescence with high quantum yield and long life At present, most of the construction of pure organic room temperature phosphorescence system focuses on highly ordered crystal structure or rigid substrate embedded materials, but such systems still face problems in the preparation of solid-state thin film light-emitting devices, such as poor repeatability and cumbersome processing process, which further limits the commercial application of such materials In this work, the research team prepared a series of amorphous polymer materials with high efficient room temperature phosphorescence emission by simply copolymerizing various oxygen-containing functional group substituted phenyl phosphorescent monomers with acrylamide This kind of amorphous materials can be observed by naked eyes because of its long life and high efficiency in mass production It is worth noting that in this work, the N - π * transition promoted by lone pair electrons on oxygen atom is used to improve the crossing probability of the system, instead of the usual heavy halogen atoms in this kind of system, the room temperature phosphorescence emission of amorphous heavy halogen atoms is realized The hydrogen bond crosslinking network between the acrylamide polymer chains can not only fix the phosphor group to inhibit its non radiation transition, but also provide a micro environment to isolate the quenching molecules, so as to ensure that the system can achieve efficient room temperature phosphorescence emission At the same time, because the halogen heavy atoms are not used in the system, the lifetime of the three-wire state is greatly increased, and the luminescence phenomenon can last for 5 s after the excitation light source is removed This research achievement is the first report of pure organic room temperature phosphorescent polymer material without heavy atom and fixed form The preparation method is novel, simple and universal It is highly praised by journal editors and reviewers (top 5%), and selected as VIP paper and journal inner cover report Academician Tian He and Professor Ma Hui are the co correspondents of this paper They guide master Xu Chao and doctoral student Wang Jie to complete this research work together In recent years, Professor Ma Xiang, winner of National Excellent Youth Fund, has made a series of important progress in the field of building organic luminescent (fluorescence and room temperature phosphorescence) materials based on supramolecular methods: building supramolecular system with polychromatic (including white light) fluorescence emission based on the interaction of cyclodextrin host guest (j.am Chem SOC., 2016, 138, 13541); pure organic single molecule polychromatic (including white light) fluorescence emission system (chem SCI., 2018, 9, 5709); supramolecular system with polychromatic (including white light) luminescence based on calixarene inclusion vibration induced luminescence (VIE) guest molecules (adv opt Mater., 2018, 6, 1800074); pure organic amorphous small molecule high efficiency room temperature phosphorescent emission materials (j.am Chem SOC., 2018, 140, 1916); organic-inorganic hybrid fluorescent room temperature phosphorescent double emission functional membrane materials with humidity response (ind Eng chem Res., 2018, 57, 2866) and invitation review papers entitled "white light materials constructed by supramolecular strategy" (adv opt Mater.), 2018, 1800273) The research results are jointly supported by the NSFC basic science center project led by academician Tian He, as well as the NSFC innovation research group project and the excellent youth fund project.