The research group of Professor Kong Xiangjian and Professor Long Lasheng of Xiamen University has made new progress in the research of rare earth titanium oxide clusters

Professor Kong Xiangjian, School of chemistry and chemical engineering, Xiamen University, and Professor Long Lasheng's research group have made new progress in the research of rare earth titanium oxide clusters, and the relevant achievements "assembly of wheel like EU 24 Ti 8 cluster under guidance of high resolution electronics industrialization mass spectrum" have been published online in angel Chem Int ed (DOI: 10.1002/anie.201806757 ） 。 Molecular module assembly is an effective method to construct macromolecular clusters However, it is difficult to predict whether the molecules involved in the reaction can form molecular modules and whether these formed modules can be further assembled due to the involvement of a large number of small molecules The time resolved high-resolution electrospray ionization mass spectrometry (HRESI-MS) was used to track the molecular assembly process of four isopropanol titanium, acetylacetone europium and salicylic acid in acetonitrile solution It is revealed that the above reaction can not only form the Eu 3 Ti module element, but also the Eu 3 Ti module element can be further assembled into a cyclic Eu 24 Ti 8 cluster Based on the above-mentioned mass spectrometry results, the team has successfully synthesized eu24 Ti 8, the highest ring rare earth titanium oxide cluster so far, which is connected by eight Eu3 Ti units head and tail, with quasi octagonal symmetry The outer diameter of the ring is 4.1nm, the inner diameter is 0.9nm, and the thickness is 1.6nm This work is of great significance for the rapid and efficient synthesis of high nuclear metal clusters The outer diameter, inner diameter and thickness of EU 24 Ti 8 (source: angelw Chem Int ed.) were jointly completed by Zheng Hao, Ph.D student, School of chemistry and chemical engineering, Xiamen University, and Du Minghao (co first author) Professor Tang Zichao and Lin Shuichao, senior engineer of the school of chemistry and chemical engineering, have given a lot of guidance and help in mass spectrometry experiment and analysis The crystal structure is completed in Shanghai light source synchrotron radiation center The research work was supported by NSFC (project approval No.: 21673184, 21431005, 21390391, 21721001) and young teachers foundation of HuoYingDong Foundation (project approval No.: 151013).