Title

From Discrete Molecules To One-Dimensional Coordination Polymers Containing Mn(Ii), Zn(Ii) Or Cd(Ii) Pyridine-2-Aldoxime Building Unit

Keywords

Coordination polymers; Fluorescence properties; Pyridine-2-aldoxime; X-ray

Abstract

The syntheses, spectroscopic characterization and crystal structures for eight coordination compounds [Cd(HCO2)2(pya)2] (1), {[M(bdc)(pya)].1.5DMF}n (M = Mn(II), Zn(II), Cd(II) (2-4), [Zn(SO4)(pya)(H2O)3] (H2O) (5), [(ZnSO4)2(pya)4] DMF.2H2O (6), [Zn(SO4)(pya)(H2O)2]n (7), and [Cd(SO4)(pya)(H2O)]n (8) [pya = pyridine-2-aldoxime, bdc = 1,4-benzenedicarboxylate, DMF = N,N′-dimethylformamide] are reported. Compounds 1-4 and 6 contain two, while 5, 7, and 8 contain one neutral pya ligand coordinated in a chelate mode to the metal center through the N pyridyl and Noxime atoms. The dicarboxylic bdc anions provide an access to 1D polymeric arrays in 2-4. The hybrid sulfates including discrete mononuclear (5), binuclear (6), and 1D polymeric (7, 8) coordination arrays were obtained due to different binding modes of coordinated sulfate anion. While solid state fluorescence of new polymeric compounds 2-4 is similar to that of the H2bdc ligand, a rare dual emission is observed for compounds 7 and 8. According to TD-DFT calculations, emission at 400 and 650 nm originates from nπ* and ππ* states of the pya ligand respectively. © 2013 Elsevier Ltd. All rights reserved.

Publication Date

1-1-2013

Publication Title

Polyhedron

Volume

60

Number of Pages

140-150

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.poly.2013.05.005

Socpus ID

84878739470 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84878739470

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