Ostasz Agnieszka, Kirillov Alexander M
Department of General and Coordination Chemistry and Crystallography, Institute of Chemical Science, Faculty of Chemistry, Maria Curie-Skłodowska University, M.C. Skłodowska Sq. 2, 20-031 Lublin, Poland.
Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal.
Polymers (Basel). 2020 Jun 10;12(6):1329. doi: 10.3390/polym12061329.
Two new 3D coordination polymers (CPs), formulated as [Zn(-XBT)] () and [Cd(-XBT)] (), were assembled from a virtually unexplored -xylylene-bis(2-mercaptoacetic) acid linker (-XBTA) and characterized by infrared spectroscopy (FTIR), powder X-ray diffraction (PXRD), thermal analysis methods (TG-DSC, TG-FTIR), single-crystal X-ray diffraction, and topological analysis. Two different synthetic strategies were explored, namely the precipitation () and hydrothermal () methods, resulting in a Zn(II) derivative [Zn(-XBT)·HO] () and its dehydrated analogue [Zn(-XBT)] (), respectively. In the Cd(II)-containing system, the same [Cd(-XBT)] ( = ) products were generated by both synthetic methods. Upon dehydration, undergoes a "crystal-to-crystal" phase transition in the 170-185 °C temperature range, producing an anhydrous polycrystalline sample (). Both CPs and are isostructural and feature polymeric 3D metal-organic nets of the topological type, which are driven by the 4-linked metal and -XBT nodes. These compounds represent unique examples of coordination polymers derived from -xylylene-bis(2-mercaptoacetic) acid, thus opening up the use of this flexible S,O-heterodonor building block in the design of polymeric metal-organic architectures.
两种新的三维配位聚合物（CPs），化学式为[Zn(-XBT)] () 和 [Cd(-XBT)] ()，由一种几乎未被探索的对二甲苯二(2-巯基乙酸) 酸连接体（-XBTA）组装而成，并通过红外光谱（FTIR）、粉末X射线衍射（PXRD）、热分析方法（TG-DSC、TG-FTIR）、单晶X射线衍射和拓扑分析进行了表征。探索了两种不同的合成策略，即沉淀法（）和水热法（），分别得到了锌（II）衍生物[Zn(-XBT)·HO] () 及其脱水类似物[Zn(-XBT)] ()。在含镉（II）的体系中，两种合成方法都生成了相同的[Cd(-XBT)] （ = ）产物。脱水后， 在170-185 °C温度范围内发生“晶到晶”的相变，生成无水多晶样品（）。CPs 和 都是同构的，具有 拓扑类型的聚合物三维金属有机网络，由4连接的金属和-XBT节点驱动。这些化合物代表了源自对二甲苯二(2-巯基乙酸) 酸的配位聚合物的独特例子，从而为这种灵活的S，O-杂供体结构单元在聚合物金属有机结构设计中的应用开辟了道路。
