A dicyanoamide-bridged 2D polynuclear zinc(II) complex having formula [Zn2(L)(μ-dca-κN1κN5)2]n, 1 has been synthesized using the Schiff base ligand N,N′-bis(salicylidene)-1,3-diaminopentane, (H2L) and sodium dicyanoamide [Na(dca)]. The complex presents a 2D hexagonal structure formed by 1,5-dca singly bridged helical chains connected through double 1,5-dca bridges. The ligand and the complex are well characterized by elemental analyses, IR and UV–vis spectroscopy. Thermogravimetric analysis is performed to investigate the thermal stability of the metal–organic framework. Photoluminescence studies of the Schiff base ligand in methanol and of the zinc(II) complex 1 in solid state show the presence of blue emission. The emission of the ligand occurs from an excited state involving an intramolecular proton-transfer process as a result of keto–enol tautomerisation and the zinc(II) complex emits from a ligand-centered excited state.
使用席夫碱
配体 N,N'-双(
水杨基)-1 合成了具有式 [Zn2(L)(μ-dca-κN1κN5)2]n, 1 的二
氰酰胺桥联二维多核
锌 (II) 配合物, 3-二
氨基
戊烷 (H2L) 和二
氰基酰胺
钠 [Na(dca)]。该复合物呈现出由1,5-dca单桥螺旋链通过双1,5-dca桥连接形成的二维六边形结构。
配体和络合物通过元素分析、红外和紫外-可见光谱得到了很好的表征。进行热重分析来研究
金属有机骨架的热稳定性。对
甲醇中席夫碱
配体和固态
锌(II)络合物 1 的光致发光研究表明存在蓝色发射。
配体的发射发生在激发态,涉及由于酮-烯醇互变异构而导致的分子内质子转移过程,并且
锌(II)络合物从以
配体为中心的激发态发射。