Covalent carbene modification of 2D black phosphorus  

作　　者：Lei Zhang Zhe-Ji Wang Bo Ma Xiang-Yang Li Yu-Chi Dai Guowen Hu Yong Peng Qiang Wang Hao-Li Zhang 

机构地区：[1]State Key Laboratory of Applied Organic Chemistry(SKLAOC),Key Laboratory of Special Function Materials and Structure Design(MOE),College of Chemistry and Chemical Engineering,Lanzhou University,Lanzhou 730000,China [2]Office of Laboratory and Equipment Management,Lanzhou University,Lanzhou 73000,China [3]Key Laboratory of Magnetism and Magnetic Materials of Ministry of Education,School of Physical Science and Technology,Lanzhou University,Lanzhou 730000,China [4]Tianjin Key Laboratory of Molecular Optoelectronic Sciences,Department of Chemistry,Collaborative Innovation Center of Chemical Science and Engineering(Tianjin),Tianjin University,Tianjin 300072,China

出　　处：《Chinese Chemical Letters》2022年第10期4640-4644,共5页中国化学快报（英文版）

基　　金：supported by the Ministry of Science and Technology of China(No.2017YFA0204903);National Natural Science Foundation of China(NSFC.Nos.51733004,51525303,22073038,21702085);111 Project.

摘　　要：Black phosphorus(BP)has attracted an ever-growing interest due to its unique anisotropic two-dimensional structure,impressive photoelectronic properties and attractive application potential.However,the tools for bandgap engineering and passivation via covalent modification of BP nanosheets remain limited to diazonium salt and nucleophilic addition methods,so that developing new modification strategies for BP nanosheets is crucial to explore its physical and chemical properties and enrich the toolbox for functionalization.Herein,we report the covalent modification of liquid-phase exfoliated BP nanosheets based on a rational analysis of BP structure.The modification of BP is achieved via carbene,a highly reactive organic mediate.The carbene modification improves the solubility and stability of BP nanosheets.Detailed microscopic and spectroscopic characterizations including infrared spectra,Raman spectra,X-ray photoelectron spectra,SEM and TEM were conducted to provide insights for the reaction.The proof of the existence of covalent bonds between BP nanosheets and organic moieties confirms the successful modification.Moreover,theoretical calculations were conducted to unveil the reaction mechanism of the two different types of bonds and the chemical property of two-dimensional BP.

关 键 词：Two-dimensional materials Black phosphorus Covalent functionalization CARBENE SOLUBILITY 

分 类 号：TB34[一般工业技术—材料科学与工程]