摘要
为提高共价有机框架(COFs)材料的结晶度,从而提高其在气体吸附领域的应用,使用2,5-二甲基对苯二甲酰肼(Th-(Me)_(2))与2,4,6-三(4-醛基苯基)-1,3,5-三嗪(TFPT)作为构筑单元,采用溶剂热法成功合成新型甲基功能化COF材料(COF-Th-Me)。利用粉末X射线衍射、红外光谱、固体核磁共振碳谱、氮气吸附-脱附和热重分析等方法,结合理论模拟对COF-Th-Me结构性质进行研究,并对其二氧化碳吸附性能进行分析。结果表明,与无甲基功能化COF(COF-Th)相比,COF-Th-Me的结晶度明显提高,结构表现为AA堆积结构(加权图形方差因子R_(wp)=2.00%,图形方差因子R_(p)=1.53%),具有较高的热稳定性。COF-Th-Me在273K和0.1MPa条件下,对二氧化碳气体的吸附量达到了27.6 cm^(3)/g,由此可知其在气体吸附领域具有潜在应用价值。
In order to improve the crystallinity of covalent organic frameworks(COFs)materials and improve their application in the field of gas adsorption,2,5 dimethyl terephthalic hydrazide(Th-(Me)2)and 2,4,6-tri(4-aldehyde phenylphenyl)-1,3,5-triazine(TFPT)were used as building blocks,leading to the successful synthesis of novel methyl functionalized COF(COF-Th-Me)through the solvothermal method.Powder X-ray diffraction,fourier transform infrared spectroscopy,solid-state carbon nuclear magnetic resonance spectroscopy and nitrogen adsorption-desorption methods were employed to study its structural properties.The results show that compared with non-methyl functionalized COF(COF-Th),the crystallinity of COF-Th-Me is significantly improved,and the structure in AA stacked mode(R_(wp)=2.00%,R_(p)=1.53%)according to simulation results.The thermogravimetric analysis show that COF-Th-Me has high thermal stability.Under the conditions of 273 K and 0.1 MPa,COF-Th-Me exhibits an adsorption capacity of 27.6 cm^(3)/g for CO_(2),demonstrating its potential application in the field of gas adsorption.
作者
陈田
郑琦
王连军
江莞
CHEN Tian;ZHENG Qi;WANG Lianjun;JIANG Wan(College of Materials Science and Engineering,Donghua University,Shanghai,China;State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Donghua University,Shanghai,China;Institute of Functional Materials,Donghua University,Shanghai,China)
出处
《东华大学学报（自然科学版）》
CAS
北大核心
2024年第4期132-138,共7页
Journal of Donghua University(Natural Science)
基金
中央高校基本科研业务费专项资金(2232020A-02)。
关键词
共价有机框架
结构模拟
溶剂热法
二氧化碳吸附
covalent organic framework
structural simulation
solvothermal method
CO_(2)absorption
