Title

Assembly of anion-controlled cadmium(II) coordination polymers from the use of 2-acetyl-pyridyl-isonicotinoylhydrazone

Document Type

Article

Publication Date

1-1-2017

Subject Area

ARRAY(0x55fccb574be0)

Abstract

Four Cd(II) coordination polymers have been synthesized, utilizing a tetradentate pyridine-based Schiff base ligand, namely 2-acetyl-pyridyl-isonicotinoylhydrazone (HL), and different anions (CH3COO−, N3−, SCN−). The products {[Cd2(L)2(CH3COO)2]·C2H5OH}n(1), {[Cd1.5(L)(CH3COO)(N3)(H2O)]·C2H5OH}n(2), {[Cd(HL)(SCN)2]·CH3OH}n(3) and [Cd3(HL)2(SCN)6]n(4), were characterized with single-crystal X-ray diffraction, IR spectroscopy, and luminescence studies. The ligand in 1 and 2 is singly-deprotonated and coordinates to the cadmium centre in the enolic form ([dbnd]N–N[dbnd]C–O) while in compounds 3 and 4 it coordinates in its neutral keto form ([dbnd]N–NH–C[dbnd]O). The tetradentate ligand in 2 acts as a linker and leads to the formation of a one-dimensional coordination polymer. The CH3COO−in 1 and SCN−in 3 and 4, further act as bridges, forming two-dimensional coordination polymers (1 and 3) and a three-dimensional network (4). Structural diversity is thus induced by the anions, due to the variable steric hindrance they impose as well as differing bridging capacity; metal-organic network formation is also evident via different Van der Waals forces.

Publication Title

Inorganica Chimica Acta

Volume

457

First Page

150

Last Page

159

Digital Object Identifier (DOI)

10.1016/j.ica.2016.12.009

ISSN

00201693

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