On the role of non-covalent interactions in the assembly of 3D zirconium methyl- and ethyl-N,N-bis phosphonates
作者:Marco Taddei、Riccardo Vivani、Ferdinando Costantino
DOI:10.1039/c3dt50400j
日期:——
Novel Zr methyl- and ethyl-N,N-bis(methylphosphonates), with formula ZrF2[(O3PCH2)2NHCH3] and Zr[(HO3PCH2)(O3PCH2)NHC2H5]2, respectively, were prepared in mild solvothermal conditions and their structures were solved ab initio by laboratory X-ray powder diffraction data. Despite the chemical homology between the molecular building blocks, and the similar synthetic conditions, the two compounds showed different stoichiometry and crystal structure. A comparative analysis of these structures and that of homologous longer chain Zr phosphonates, previously reported, revealed the important contribution of the hydrophobic groups in the building of the crystal structure, in a way that can be compared to that observed in the assembly of amphiphilic systems.
新颖的锆甲基和乙基N,N-双(甲基磷酸酯),其化学式分别为ZrF2[(O3PCH2)2NHCH3]和Zr[(HO3PCH2)(O3PCH2)NHC2H5],是在温和的溶剂热条件下制备的,并通过实验室X射线粉末衍射数据进行从头算结构解析。尽管分子构建单元之间存在化学同源性,并且合成条件相似,但这两种化合物表现出不同的化学计量比和晶体结构。对这些结构以及之前报告的同类长链锆磷酸酯的比较分析揭示了疏水基团在晶体结构构建中的重要作用,这一点可以与两亲系统的组装过程进行比较。