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包合复合物(ICs)是超分子化学的重要组成部分。以尿素作为主体分子,PEO作为客体分子,通过共沉淀法制备了不同PEO与Urea比例的PEOUIC,而后分别利用DSC、XRD、SEM、POM分析了PEOUIC晶体的形貌与结构。结果表明:利用共沉淀法可制备六方以及四方晶系的PEOUIC晶体;当PEO与Urea质量比小于为1时,形成四方晶系PEOUIC晶体;而当质量比大于1时,形成六方晶系PEOUIC晶体;随着Urea含量的增大,PEOUIC的T_m先增大在趋于稳定不变;四方晶系PEOUIC晶体呈现球晶形貌,六方晶系呈现中心突起的六边形柱状体形貌。
Inclusion complexes (ICs) are an important part of supramolecular chemistry. PEO as the guest molecule, PEOUIC with different proportions of PEO and Urea were prepared by coprecipitation method. The morphology and structure of PEOUIC crystal were analyzed by DSC, XRD, SEM and POM respectively. The results show that the hexagonal and tetragonal PEOUIC crystals can be prepared by coprecipitation method. When the mass ratio of PEO to Urea is less than 1, the tetragonal PEOUIC crystals are formed. When the mass ratio is greater than 1, hexagonal PEOUIC crystals ; With the increase of Urea content, the T_m of PEOUIC first increases and tends to be stable; the spheroidal morphology of tetragonal PEOUIC crystals and the hexagonal hexagonal columnar morphology show the central protrusions.