Two-dimensional Covalent Organic Frameworks（2D-COFs） Via Schiff-base Condensation Reactions Between Porphyrins
作者单位：Department of ChemistryUniversity College London School of Materials Science and EngineeringSun Yat-Sen University
会议名称：《中国化学会第十六届胶体与界面化学会议》
会议日期：2017年
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学]
关 键 词：On-surface synthesis Monolayer covalent-organic frameworks Scanning probe microscopy Schiff-base condensation
摘 要：Since the successful isolation of individual graphene sheets in 2003 two-dimensional covalent materials have evolved in to one of the most widely studied areas of chemistry and physics.A particularly successful way of synthesizing new 2 D covalent materials has been via a bottom-up approach in which suitably functionalised molecules are covalently linked together to form 2 D covalent-organic frameworks（2 D-COFs）.This approach has been employed with a range of different reactions schemes and molecular building *** important step forward in this area was the use of reversible reactions that allowed the formation of the 2 D-COF to take place under thermodynamic control,leading to the formation of highly ordered *** this work we present recent scanning tunneling microscopy（STM） and atomic force microscopy（AFM） results on the growth of 2 D-COFs using free-base and metal-containing tetraphenyl amine porphyrin（TAPP） building *** TAPP molecules are linked together via a Schiff-base condensation reaction with benzene-1,4-dicarboxaldehyde（BDCA）.This reaction forms imine linkages between the porphyrin *** controlling the synthesis conditions highly ordered and large scale（100’s nm） 2 D-COFs can be *** addition,by controlling the symmetry and chemical functionality of both the porphyrin and the linking aldehyde molecule 2 D-COFs with more complex structures can be ***,investigations on the possibility of post synthesis functionalization of the resulting 2 D-COF structures will be discussed.