A noncentrosymmetric coordination polymer based on the benzophenone-3,3′-disulfonyl-4,4′-dicarboxylate ligand exhibiting second-harmonic-generation responses

• Published in: Inorganic chemistry communications 2018-09, Vol.95, p.107-110
• Main Authors: Li, Zhen-Tao, Zhang, Wen-Wen, Liu, Qingyou, Liu, Qing-Yan, Wang, Yu-Ling
• Format: Article
• Language: English
• Subjects: Benzophenone-3,3′-disulfonyl-4,4′-dicarboxylate; Cadmium compound; Second-harmonic-generation
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2018.07.021

A 3D coordination polymer [CdK6(μ2-H2O)2(BODSDC)2(H2O)]n (1) based on the novel benzophenone-3,3′-disulfonyl-4,4′-dicarboxylate (BODSDC4−) ligand was synthesized and structurally characterized. The carboxylate and sulfonate groups of the organic ligands as well as the bridging water molecules connect the Cd2+ and K+ ions to produce a 2D layer, which is linked by the benzophenone moieties to give a 3D pillared framework. Compound 1 crystallizes in an acentric space group of Cc and has a large second-harmonic-generation (SHG) response of 1.3 times that of potassium dihydrogen phosphate (KDP) in the particle size of 25–210 μm. Further SHG measurements revealed that the material is type-I phase-matchable. The observed SHG efficiency is associated with the unsymmetrical geometry of the organic ligand and the distorted coordination polyhedrons of metal centers. A 3D coordination polymer [CdK6(μ2-H2O)2(BODSDC)2(H2O)]n (1) based on the benzophenone-3,3′-disulfonyl-4,4′-dicarboxylate (BODSDC4−) was presented. Compound 1 crystallizes has a large second-harmonic-generation response of 1.3 times that of KDP and is type-I phase-matchable. [Display omitted] •A 3D Cd(II) coordination polymer with sulfonate-carboxylate ligand.•A Cd(II) coordination polymer crystallizes in an acentric space group.•A Cd(II) coordination polymer has a large SHG response.