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Three Heterometallic Coordination Polymers Containing Lead(II): Syntheses, Crystal Structures, and Fluorescence Properties
Author(s) -
Zheng YanFeng,
Sun YaQiu,
Xu YanYan,
Gao DongZhao,
Zhang GuoYing
Publication year - 2015
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201400297
Subject(s) - oxamide , supramolecular chemistry , isophthalic acid , crystallography , hydrogen bond , lone pair , chemistry , steric effects , crystal structure , crystal engineering , terephthalic acid , stereochemistry , molecule , polyester , organic chemistry
Three coordination polymers [Pb 2 (nipt) 2 (NiL) 2 ] ( 1 ), [Pb(tpt)(NiL)] · 2H 2 O ( 2 ), and [Pb 2 (ipt) 2 (NiL) 2 ] ( 3 ) (ML, H 2 L = 2, 3‐dioxo‐5, 6, 14, 15‐dibenzo‐1, 4, 8, 12‐tetraazacyclo‐pentadeca‐7, 13‐dien, H 2 nipt = 5‐nitroisophthalic acid, H 2 tpt = terephthalic acid, H 2 ipt = isophthalic acid) were synthesized by solvothermal methods and characterized by single‐crystal X‐ray diffraction. Complex 1 exhibits a zigzag chain consisting of Pb 2 Ni 2 units with oxamide and 5‐nitro isophthalate bridges, whereas complex 2 possesses a double chain with oxamide and terephthalate bridges. Complexes 1 and 2 have a 2D supramolecular architecture formed by intermolecular interactions and hydrogen bonds. Complex 3 exhibits a two‐dimensional network structures formed by Pb 4 Ni 4 units via oxamide and isophthalate bridges. In complexes 1 – 3 , the arrangement of donor atoms suggest that the coordination around the lead(II) atoms is hemi‐directed. The different steric hindrance of bridged ligands, and lone pair electrons effect of lead(II) ion cooperatively influence nipt, tpt and ipt displaying in diverse connecting modes and further result in different structures. Additionally the fluorescence properties of compounds 1 – 3 are discussed.