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Encapsulation of a Water Octamer Chain in a Chiral 2D Sheetlike Supramolecular Coordination Network Composed of Dinickel–Dicarboxylate Subunits
ACS Omega ( IF 3.7 ) Pub Date : 2018-09-13 00:00:00 , DOI: 10.1021/acsomega.8b01355 Navnita Kumar 1 , Sadhika Khullar 2 , Sanjay K. Mandal 1
ACS Omega ( IF 3.7 ) Pub Date : 2018-09-13 00:00:00 , DOI: 10.1021/acsomega.8b01355 Navnita Kumar 1 , Sadhika Khullar 2 , Sanjay K. Mandal 1
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Four new chiral supramolecular coordination networks of Ni(II) of general formula [Ni2(Hhissal)2(dicarboxylate)(H2O)2]·nH2O (where Hhissal = histidinesalicylate; dicarboxylate = adipate; n = 8 for 1, succinate; n = 4 for 2, maleate; n = 4 for 3, fumarate; and n = 6 for 4) are reported. On the basis of the single-crystal X-ray study, an unprecedented zig-zag chain structure of water octamer encapsulated in 1 has been identified. The supramolecular network of the dimetal subunits is formed through hydrogen bonding interactions between the amine N–H of Hhissal and the oxygen atom of the coordinated water molecule of one subunit with the uncoordinated oxygen atom and the coordinated oxygen atom of the carboxylate group of Hhissal of the next subunit, respectively. The strength of hydrogen bonding within this water cluster (the range of O···O distances is 2.702–2.760 Å) is similar to that found in ice. These networks are further characterized by elemental analysis, IR spectroscopy, powder X-ray diffraction, polarimetry, UV–vis/diffuse reflectance and circular dichroism spectroscopy, and thermogravimetric analysis. A comparison of their properties indicates that these are isostructural with a variation of encapsulated water clusters.
中文翻译：
双辛二酸二羧酸酯亚基组成的手性二维片状超分子配位网络中水八聚体链的封装
通式[Ni 2（Hhissal）2（二羧酸盐）（H 2 O）2 ]· n H 2 O的四个新的Ni（II）手性超分子配位网络（其中Hhissal =组氨酸水杨酸酯；二羧酸盐=己二酸酯；n = 8 1，琥珀酸盐; ñ = 4 2，马来酸盐; ñ为= 4 3，富马酸盐;和ñ = 6 4）的报告。在单晶X射线研究的基础上，史无前例的水八聚体之字形链结构封装在1中已被确定。双金属亚单位的超分子网络是通过Hhissal的胺N–H与一个亚单位的配位水分子的氧原子与未配位的氧原子和Hhissal的羧酸根的配位氧原子之间的氢键相互作用形成的下一个子单元。该水团簇中的氢键结合强度（O···O距离范围为2.702–2.760Å）与冰中的相似。这些网络的进一步特征在于元素分析，红外光谱，粉末X射线衍射，旋光，紫外可见/漫反射和圆二色光谱以及热重分析。比较它们的性质表明，它们是同构的，具有封装的水簇的变化。
更新日期：2018-09-13
中文翻译：
双辛二酸二羧酸酯亚基组成的手性二维片状超分子配位网络中水八聚体链的封装
通式[Ni 2（Hhissal）2（二羧酸盐）（H 2 O）2 ]· n H 2 O的四个新的Ni（II）手性超分子配位网络（其中Hhissal =组氨酸水杨酸酯；二羧酸盐=己二酸酯；n = 8 1，琥珀酸盐; ñ = 4 2，马来酸盐; ñ为= 4 3，富马酸盐;和ñ = 6 4）的报告。在单晶X射线研究的基础上，史无前例的水八聚体之字形链结构封装在1中已被确定。双金属亚单位的超分子网络是通过Hhissal的胺N–H与一个亚单位的配位水分子的氧原子与未配位的氧原子和Hhissal的羧酸根的配位氧原子之间的氢键相互作用形成的下一个子单元。该水团簇中的氢键结合强度（O···O距离范围为2.702–2.760Å）与冰中的相似。这些网络的进一步特征在于元素分析，红外光谱，粉末X射线衍射，旋光，紫外可见/漫反射和圆二色光谱以及热重分析。比较它们的性质表明，它们是同构的，具有封装的水簇的变化。
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