摘要
合成了一种可聚合凝胶因子 (Gelator) 4 ,4′ 二 (α 甲基丙烯酰氧基 1,3 亚乙氧基羰基丙酰氨基 )二苯甲烷(BMDM) .BMDM能在二苯醚、甲苯、二甲苯、氯苯等含苯环的低极性溶剂中形成热可逆的物理凝胶 ,而在二甲基甲酰胺、乙醇和二氯甲烷等强极性溶剂中则易溶解 ,在乙醚、石油醚等非极性溶剂中不溶解 .FT IR和DSC研究该凝胶因子在二苯醚中形成的凝胶 ,发现该凝胶因子是通过氢键等次价键力相互作用而聚集、自我组装形成凝胶的 .利用溶胶 -凝胶相转变和DSC数据 ,研究了该有机凝胶的热力学参数和性质 ,BMDM在二苯醚中形成的凝胶聚集体间的范德华弱相互作用焓为ΔH =0 .8kJ·mol-1,凝胶 -溶胶相转变热焓为ΔH =2 2 .3kJ·mol-1.
A polymerizable gelator of 4,4'-bis (alpha-methylacryloyloxy-1,3-ethyleneoxycarbonylpropionamido)-diphenylmethane (BMDM) has been synthesized, which can cause physical gelation in many aromatic solvents, including benzene, toluene, xylene and diphenyl ether. The presence of intermolecular hydrogen-bonding in the organogels was proved by FT-IR spectroscopy. The measurements of differential scanning calorimetry (DSC) also indicated that aggregation of the organogels occured as a result of cooperating noncovalent interactions such as intermolecular hydrogen-bonding. It was found by DSC that the potential. barrier for disassociation of the gel aggregates formed by van der Waals interaction is 0.8 kJ (.) mol(-1) and the enthalpy of gel-sol phase transition for fiber aggregated by hydrogen bonding is 22.3 kJ (.) mol(-1).
出处
《有机化学》
SCIE
CAS
CSCD
北大核心
2002年第9期651-657,共7页
Chinese Journal of Organic Chemistry
基金
国家自然科学基金 (No .2 99740 12 )资助项目
