Three silver iodides with zero and one-dimensional hybrid structures directed by conjugated organic templates: synthesis and theoretical study
作者:Hao-Hong Li、Zhi-Rong Chen、Li-Chuan Cheng、Miao Feng、Hui-Dong Zheng、Jun-Qian Li
DOI:10.1039/b902465d
日期:——
Under the direction of large conjugated organic cationic SDAs (structure-directing agents), three silver(I) iodides, (ipq)4(Ag2I6·2I2) (1), [pql][Ag2I3]}n (2), [(npql)2(Ag4I6)]n (3) (ipq+ = N-(isopentyl)-quinolinium, pql+ = N-propyl-quinolinium, npql+ = N-(n-pentyl)-quinolinium) have been synthesized. 1 presents a zero-dimensional structure constituting of ipq+ cations, [Ag2I6]4− anions and molecular iodine. But 2 and 3 consist of one-dimensional coordination polymers that could be described as edge-sharing AgI4 tetrahedra. Electrostatic interactions between organic counter cations and inorganic moieties are present and contribute to the crystal packing. The structural differences between 1, 2 and 3 illustrate the influences of substituents of SDAs on the linkage modes of AgI4 tetrahedra. DFT calculations were carried out to reveal their electronic structures.
在大型共轭有机阳离子 SDA(结构引导剂)的引导下,产生了三种碘化银,即 (ipq)4(Ag2I6-2I2) (1)、[pql][Ag2I3]}n (2)、[(npql)2(Ag4I6)]n (3)、(ipq+ = N-(异戊基)-喹啉鎓,pql+ = N-丙基-喹啉鎓,npql+ = N-(正戊基)-喹啉鎓)。1 呈零维结构,由 ipq+ 阳离子、[Ag2I6]4- 阴离子和分子碘组成。而 2 和 3 则由一维配位聚合物组成,可以说是共边的 AgI4 四面体。有机反阳离子和无机分子之间存在静电相互作用,并促成了晶体的堆积。1、2 和 3 之间的结构差异说明了 SDA 取代基对 AgI4 四面体连接模式的影响。通过 DFT 计算揭示了它们的电子结构。