Assembly of silver(i)–organic frameworks from flexible supramolecular synthons with pendant ethynide arm attached to biphenyl and phenoxybenzene skeletons
作者:Bo Li、Ren-Wu Huang、Shuang-Quan Zang、Thomas C. W. Mak
DOI:10.1039/c3ce40230d
日期:——
A series of six silver(I) complexes bearing terminal ethynide moiety attached via pendant arm to biphenyl and phenoxybenzene skeletons of two new ligands have been synthesized. In these compounds, the invariable appearance of the μ3-, μ4- and μ5-ligation modes of the ethynide moiety reaffirms the general utility of the silverâethynide supramolecular synthons L â Agn (n = 3â5) in coordination network assembly. In complexes 1, 2, 4, and 5, silver(I)âaromatic interactions play important roles in assembling a series of silverâorganic frameworks. Notably, an unusual Ïâ¯Ag4â¯Ï sandwich unit makes it appearance in complex 2, which is the first example in silverâethynide complexes. An argentophilic layer is found in complex 3. In addition, a two-fold interpenetrating 3D supramolecular framework based on discrete Ag8 aggregate is found in complex 6. In the solid state, their luminescence behaviors have been studied.
合成了六种银(I)复合物,这些复合物具有终端乙炔基团,通过悬臂链连接到两个新配体的联苯和苯氧基苯骨架上。在这些化合物中,乙炔基团的μ3、μ4和μ5配位模式的恒定出现,重申了银-乙炔超分子合成体L ⊂ Agn (n = 3–5)在配位网络组装中的一般实用性。在复合物1、2、4和5中,银(I)-芳香相互作用在组装一系列银-有机框架中发挥了重要作用。值得注意的是,复合物2中出现了一种不寻常的π-Ag4-π三明治单元,这是银-乙炔复合物中的首个例子。复合物3中发现了银亲和性层。此外,在复合物6中发现了基于离散Ag8聚合体的双重相互渗透三维超分子框架。在固态下,对它们的发光行为进行了研究。