Title
Substituent effects of two isophthalate derivatives on the construction of cadmium coordination polymers incorporating a dipyridyl ligand
Author
Lin Wang, Qian-Kun Zhou, Yun Xu, Ni-Ya Li
Year
2018
Journal
Acta Crystallographica Section C: Structural Chemistry
Abstract
In recent years, the design and construction of crystalline coordination complexes by the assembly of metal ions with multitopic ligands have attracted considerable attention because of the unique architectures and potential applications of these compounds. Two new coordination polymers, namely poly[[μ‐trans‐1‐(2‐aminopyridin‐3‐yl)‐2‐(pyridin‐4‐yl)ethene‐κ2N:N′](μ3‐5‐methylisophthalato‐κ4O1,O1′:O3:O3′)cadmium(II)], [Cd(C9H6O4)(C12H11N3)]n or [Cd(5‐Me‐ip)(2‐NH2‐3,4‐bpe)]n, (I), and poly[[μ‐trans‐1‐(2‐aminopyridin‐3‐yl)‐2‐(pyridin‐4‐yl)ethene‐κ2N:N′](μ2‐5‐hydroxyisophthalato‐κ4O1,O1′:O3:O5)cadmium(II)], [Cd(C8H4O5)(C12H11N3)]n or [Cd(5‐HO‐ip)(2‐NH2‐3,4‐bpe)]n, (II), have been prepared hydrothermally by the self‐assembly of Cd(NO3)2·4H2O and trans‐1‐(2‐aminopyridin‐3‐yl)‐2‐(pyridin‐4‐yl)ethene (2‐NH2‐3,4‐bpe) with two similar dicarboxylic acids, i.e. 5‐methylisophthalic acid (5‐Me‐H2ip) and 5‐hydroxyisophthalic acid (5‐HO‐H2ip). The coordination network of (I) is a two‐dimensional sql net parallel to (101). Adjacent sqlnets are further linked to form a three‐dimensional supramolecular framework viahydrogen‐bonding interactions. Compound (II) is a two‐dimensional (3,5)‐connected coordination network parallel to (010) with the point symbol (63)(55647). As the other reactants and reaction conditions are the same, the structural differences between (I) and (II) are undoubtedly determined by the different substituent groups in the 5‐position of isophthalic acid. Both (I) and (II) exhibit good thermal stabilities and photoluminescence properties.
Instrument
FP-8600
Keywords
Fluorescence, Solid state, Materials, Polymers