Heterometallic SrII‐MII (M=Co,Ni, Zn and Cu) Coordination Polymers: Synthesis,Temperature‐Dependent Structural Transformation,and Luminescent and Magnetic Properties |
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| Authors: | Dr Yanmei Chen Qian Gao Wenqian Chen Dr Dandan Gao Prof?Dr Yahong Li Dr Wei Liu Prof?Dr Wu Li |
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| Institution: | 1. Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123 (China);2. Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008 (China) |
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| Abstract: | The use of pyridine‐2,4‐dicarboxylic acid (H2pydc) in the construction of SrII and SrII‐MII (M=Co, Ni, Zn and Cu) coordination polymers is reported. Eight complexes, that is, Sr(pydc)H2O]n ( 1 ), MSr(pydc)2(H2O)2]n (M=Co ( 2 ), Ni ( 3 ), Zn ( 4 )), ZnSr(pydc)2(H2O)7]n?4 nH2O ( 5 ), SrCu(pydc)2]n ( 6 ), SrCu(pydc)2(H2O)3]n?2 nH2O ( 7 ), and Cu3Sr2(pydc)4(Hpydc)2(H2O)2]n ( 8 ), have been synthesized via dexterously choosing the appropriate strontium sources and transition metal salts, and rationally controlling the temperature of the reaction systems. Complexes 1 , 2 ( 3 , 4 ), 6 , and 8 display four types of 3‐D framework structures. Complexes 5 and 7 exhibit a 2‐D network and a 1‐D chain structure, respectively. The 2‐D complex 7 can be reversibly transformed into 3‐D compound 6 through temperature‐induced solvent‐mediated structural transformation. The luminescent property studies indicated that complex 1 shows a strong purple luminescent emission and 4 exhibits a strong violet luminescence emission. The magnetic properties of 2 , 3 , and 8 were also studied. Antiferromagnetic MII???MII interactions were determined for these complexes. |
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| Keywords: | alkaline earth metals heterometallic complexes luminescence magnetic properties structural transformation |
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