摘要
利用B(C6F5)3催化的Piers-Rubinsztajn反应,探讨了螺旋桨结构四苯基乙烯(TPE)分子与多面体低聚倍半硅氧烷(POSS)合成反应路线,制备了POSS基有机-无机杂化多孔材料.该反应的突出特点是生成的Si-O-C键合产物中POSS核保持完整.采用氮气吸附-脱附分析及热重分析对POSS基杂化多孔材料P4的孔性能和热性能进行了初步研究.其比表面积为SBET=582 m^(2)/g,非定域密度泛函理论(NL-DFT)计算得到其孔体积是0.43 cm^(3)/g,热重分析显示P4初始分解温度为463℃.上述结果表明,该杂化材料是一类介孔和微孔并存、并具有很好热稳定性的材料.该工作为构建有机-无机杂化多孔材料提供了新的思路.
Organic-inorganic hybrid porous polymers not only exhibit the diversity of synthesis and flexibility in pore performance control as that of organic porous materials,but also show excellent thermal stability and mechanical properties of inorganic porous materials,and thus play a very important role in the field of porous materials.Polyhedral oligomeric silsesquioxane(POSS)has highly symmetrical structure,is easy to be chemically modified,and has excellent thermal and chemical stability.The silicon oxygen connection at the center of POSS is identical to the Si―O―Si double quaternary ring structure in molecular sieves,making POSS an ideal building block for hybrid porous materials.The Piers-Rubinsztajn reaction catalyzed by B(C6F5)3 avoids the use of expensive precious metal catalysis,which is difficult to completely remove during post-processing.The reaction proceeds under mild conditions and provides an easy route to the formation of Si―O―C linkage.Using the reaction,POSS based organic-inorganic hybrid porous materials were prepared by bonding propeller tetraphenylethylene(TPE)molecules with POSS.Nitrogen adsorption-desorption analysis and thermogravimetric analysis were performed on the hybrid material,which was found to have a combined structure of mesoporous and microporous,and good thermal stability,with a specific surface area of 582 m^(2)/g and Td of 463℃.
作者
李书宏
项锴
徐彩虹
Shu-hong Li;Kai Xiang;Cai-hong Xu(Department of Chemistry,Beijing Technology and Business University,Beijing 100048;Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190;Advanced Materials Institute,Shandong Academy of Sciences,Jinan 250014)
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2024年第1期91-98,共8页
Acta Polymerica Sinica
基金
济南市引进创新团队项目(项目号202228025)资助项目。
