title: Seven novel Sr(II)-Sm(III) and Sr(II)-Dy(III) coordination polymers: construction of five classes of structural topologies using different amounts of imidazole.
abstract: The employment of pyridine-2,6-dicarboxylic acid (H2pda) and imidazole (im) in the synthesis of Sr(II)-Sm(III) and Sr(II)-Dy(III) coordination polymers has been reported. Seven novel heterometallic coordination polymers of compositions, [Dy3Sr3(pda)7(Hpda)(H2O)9]·6H2O (1), [LnSr(pda)3(H2O)5]·Him·H2O (Ln = Sm(2), Dy(3)), [Ln2Sr(pda)6(H2O)5]·4Him·C2H5OH·nH2O (Ln = Sm(4), n = 4; Dy(5), n = 5), [Sm2Sr2(pda)5(H2O)9]·2H2O (6) and [DySr(pda)3(H2O)4]·Him·3H2O (7), have been prepared and characterized. Complexes 1, 2-3, and 6 display three varieties of 2-D structures. 4-5 and 7 exhibit two types of 1-D chain structures. The structures of the complexes could be controlled via choosing appropriate starting materials and tuning the amount of imidazole. The photo-luminescent properties of these complexes have been investigated. The results show the exclusive luminescence emission bands being characteristic of Sm(III) and Dy(III).
authors.affiliation: Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
authors.forename: Yanmei
authors.initials: Y
authors.lastname: Chen
authors.forename: Yanyuan
authors.initials: Y
authors.lastname: Cao
authors.forename: Wenqian
authors.initials: W
authors.lastname: Chen
authors.forename: Qian
authors.initials: Q
authors.lastname: Gao
authors.forename: Lei
authors.initials: L
authors.lastname: Li
authors.forename: Dandan
authors.initials: D
authors.lastname: Gao
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.forename: Yahong
authors.initials: Y
authors.lastname: Li
authors.forename: Wu
authors.initials: W
authors.lastname: Li
mesh_terms: D004419:Dysprosium / Q000737:chemistry*; D007093:Imidazoles / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry*; D012493:Samarium / Q000737:chemistry*; D013324:Strontium / Q000737:chemistry*
chemical_list: D007093:Imidazoles; D009942:Organometallic Compounds; D011108:Polymers; D004419:Dysprosium; D012493:Samarium; C029899:imidazole; D013324:Strontium