Synthesis and structural characterization of three supramolecular coordination polymers constructed from different metal ions and 2,2′-bipyridyl-3,3′-dicarboxylic acid

Xiaoqing CaoaThese authors contributed equally to this work., Xu ZhengaThese authors contributed equally to this work., Meixi Chena, Xinxin Xua*, Ting Suna* & Enbo Wangb a Department of Chemistry , College of Science, Northeast University , Shenyang 110004 , P.R. China b Key Laboratory of Polyoxometalate Science of Ministry of Education, Department of Chemistry , Northeast Normal University , Changchun 130024 , P.R. China * E-mail: xuxx@mail.neu.edu.cn * E-mail: sunt@mail.neu.edu.cn Three new supramolecular coordination polymers based on 2,2′-bipyridyl-3,3′-dicarboxylic acid (H2BPDC) and Mn(II), Fe(II), and Zn(II) were synthesized under hydrothermal conditions and characterized with single-crystallographic X-ray analysis and IR spectrum. Complex 1 exhibits a 1-D, chain-like structure, which is further connected to 2-D supramolecular layer structure through hydrogen bonds. Complex 2 exhibits a 3-D supramolecular structure constructed from 1-D chains through hydrogen bonds and π–π interactions. Like 1, 3 also shows 2-D supramolecular layer structure based on 1-D chains. Furthermore, the fluorescence of 3 was studied.