[Zn(tp)(RdmB)(H 2 O)] and [Cd(tp)(RdmB)]: Two Unusual One-Dimensional Rhodamine B Coordination Polymeric Ribbons as Luminescent Sensors for Small Molecules and Metal Cations
2018; American Chemical Society; Volume: 18; Issue: 8 Linguagem: Inglês
10.1021/acs.cgd.8b00455
ISSN1528-7505
Autores Tópico(s)Luminescence and Fluorescent Materials
ResumoTwo new complexes, [Zn(tp)(RdmB)(H2O)] (I) and [Cd(tp)(RdmB)] (II) (tp = terephthalate, RdmB = rhodamine B), are obtained by similar hydrothermal synthesis reactions. X-ray crystallography reveals that both compounds are one-dimensional (1D) polymeric solids, in which I (C36H36N2O8Zn) ascribes to monoclinic C2/m space group, Z = 4 (a = 18.834(5) Å, b = 16.859(5) Å, c = 10.111(3) Å, β = 97.638(4)°), while II (C108H102N6O21Cd3) crystallizes in monoclinic P21/n, 4 (a = 12.2309(1) Å, b = 61.5661(7) Å, c = 12.5852(1) Å, β = 93.951(1)°). Owing to the difference in the coordination sphere around the metal center, four-coordinated zinc centers for I bridged by linear tp molecules associated with RdmB ligands result in an interesting 1D infinite zigzag tape-like structure, whereas six-/seven-coordinated cadmium centers for II bridged by the same ligands generate a novel 1D infinite biserrated edge ribbon structure with a 2,3,3-linked {62.10}{63}{6} network or a simplified 2,4-linked {43.62.8}{4} topological network. The former exhibits excellent luminescent selective sensing behaviors for Cu2+ cation, pyridine, dimethylformamide, and ammonia vapor molecules, while the latter also displays selectivity for sensing Cu2+ cation, pyridine, and methanol molecules.
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