Organic sol-gel synthesis of microporous molecular networks containing spirobifluorene and tetraphenylmethane nodes
作者:Su-Young Moon、Hye-Rim Mo、Min-Kyoon Ahn、Jae-Sung Bae、Eunkyung Jeon、Ji-Woong Park
DOI:10.1002/pola.26552
日期:2013.4.15
method, which enabled the synthesis of microporous molecular networks via a two‐stage mechanism involving the formation of colloidal dispersions of the nanoparticulate molecular networks and their subsequent growth to monolithic networks on solvent evaporation. The sol–gel‐synthesized molecular networks obtained by incorporating TASBF as a network former show improved porosity, processability, and thermal
基于刚性四官能单元的微孔分子网络是通过2,2',7,7'-四氨基-9,9'-螺二芴(TASBF)和/或四(4-氨基苯基)甲烷的有机溶胶-凝胶聚合合成的( TAPM)与二异氰酸酯,六亚甲基二异氰酸酯(HDI)或p苯二异氰酸酯。此项研究是我们先前关于第一种有机溶胶-凝胶法的报告的扩展,该方法使微孔分子网络能够通过两步机制进行合成,该机制涉及形成纳米颗粒分子网络的胶体分散体并随后生长为溶剂蒸发的整体网络。与基于TAPM的体系相比,通过将TASBF用作网络形成剂而获得的溶胶-凝胶合成的分子网络显示出改善的孔隙率,可加工性和热稳定性。与四苯甲烷单元相比,基于TASBF的网络孔隙率的提高归因于螺二芴的更高的刚性。我们还证明了两种网络形成剂TASBF和TAPM的溶胶-凝胶共聚反应可以合成混合的有机分子网络,和二异氰酸酯单体。随着TASBF / TAPM / HDI混合物中TASBF含量的增加,TASBF