Journal of Saudi Chemical Society ( IF 5.6 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.jscs.2020.09.005 Wei Guo , Xiaojuan Fu , Jing Chen
Aggregation of saturated mesocyclic diamine 1,4-diazacycloheptane (dach) or piperazine (pipz) and diversiform carboxylic acids with mono- or di-carboxyls yields a series of novel binary supramolecular adducts via two-point molecular recognition. All the supramolecular assemblies were obtained by solvent evaporation method from different media. X-ray single-crystal diffraction analyses reveal that these supramolecular moieties present 1D chain motif, 2D flat, corrugated sheet structures and 3D CdSO4, pillar-layered networks through carboxylate-amide N–H⋯O, as well as its proton transfer form N+–H⋯O−, carboxyl head to tail O–H⋯O, and extended hydrogen-bonding interactions. Their compositions and structures were also confirmed by Fourier transform infrared (FT-IR) spectroscopy. Thermal stability of these binary crystalline adducts has been investigated by thermogravimetric analysis (TGA), suggesting similar thermal stabilities.
中文翻译:
中环二胺与各种羧酸的超分子加合物:分子识别中的电荷辅助氢键
饱和的中环二胺1,4-二氮杂环庚烷(dach)或哌嗪(pipz)以及各种形式的羧酸与单或二羧基的聚集通过两点分子识别产生了一系列新颖的二元超分子加合物。所有超分子组装体都是通过溶剂蒸发法从不同的介质中获得的。X射线单晶衍射分析表明,这些超分子部分具有1D链基序,2D平坦,波纹状片状结构和3D CdSO 4,通过羧酸酰胺N–H⋯O形成的柱状网络及其质子转移形式N + –H⋯O −,羧基从头到尾的O–H⋯O和扩展的氢键相互作用。它们的组成和结构也通过傅立叶变换红外(FT-IR)光谱法得到证实。这些二元结晶加合物的热稳定性已通过热重分析(TGA)进行了研究,表明具有相似的热稳定性。