Direct Synthesis of Ultrathin Crystalline Two-Dimensional Triazine Polymers from Aldoximes  

作　　者：Jianghong Zhen Jichuang Shen Tian Sun Congxu Wang Pengbo Lyu Yuxi Xu 

机构地区：[1]School of Engineering,Westlake University,Hangzhou 310024,Zhejiang [2]School of Materials Science and Engineering,Xiangtan University,Xiangtan 411105,Hunan

出　　处：《CCS Chemistry》2024年第4期932-940,共9页中国化学会会刊（英文）

基　　金：support by the National Natural Science Foundation of China(grant nos.22022510 and 51873039);the Science and Technology Innovation Program of Hunan Province(grant no.2021RC2086).

摘　　要：The efficient synthesis of ultrathin crystalline twodimensional(2D)polymers with well-defined repeating units is essential to realize their broad applications but remains a great challenge.Herein,we report a new strategy to directly synthesize a series of few-layer 2D triazine-based polymers(2DTPs)via trimerization reaction of aromatic aldoximes in one step with a high yield of 85%using AlCl3 as catalyst under solvent-free conditions.The obtained 2D-TPs show high crystallinity,a lateral size of several micrometers,an ultrathin thickness less than 2 nm,and good dispersibility and processability.Through semi-in situ and detailed control experiments,we reveal that the 2D polymerization reaction is a two-step process of dehydration and then cyclotrimerization,and AlCl3 acts as not only catalyst but also an in situ generated template for promoting the formation of 2D-TPs.When explored as a new polymeric anode for potassium-ion batteries,the 2D-TP displayed an extraordinary reversible specific capacity of 356 mAh g^(−1)at 0.05 A g^(−1),which is among the best performances ever reported,outstanding rate capability(153 mAh g^(−1)at 1 A g^(−1)),and excellent cycling stability with 95.1%capacity retention after 1000 cycles at 1 A g^(−1).

关 键 词：two-dimensional triazine polymer aldoxime monomers catalytic cyclotrimerization template-assisted synthesis potassium-ion battery 

分 类 号：O62[理学—有机化学]