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Cd(II) coordination polymers based on expanded N,N'-heteroaromatic crossMark donor ligands

Date

2017

Author

Zahedi, Mansoureh
Shaabani, Behrouz
Englert, Ulli
Rad-Yousefnia, Negar
Blake, Graeme R.
Kazak, Canan

Metadata

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Abstract

The isomeric N donor linkers bis(pyridin-4-ylmethylene)naphthalene-1,5-diamine (L1) and bis(pyridin3-ylmethylene)naphthalene-1,5-diamine (L2) have been used with acetate and iodide as co-ligands to generate four new cadmium(II) coordination polymers. [CdL1(OAc)(2)] (1), [CdLl(I)(2)](n) (2), [CdL2(OAc)(2)](n) (3) and [CdL2(I)(2)](n) (4) were characterized by elemental analysis, X-ray powder diffraction, IR spectroscopy, thermal analysis and single crystal X-ray diffraction. In line with the concept of crystal engineering, their structures share common motifs: the heteroaromatic linkers generate chains, subtending Cd...Cd distances consistent with their N donor arrangement. The co-ligands control the coordination number of the Cd(1I) cations and interchain connectivity: The acetate moieties either adopt bridging and chelating or exclusively bridging modes and crosslink essentially linear chains based on octahedral metal centers; in the former case, the ladder-like one-dimensional ribbon I is generated, whereas the latter connectivity results in the two-dimensional layer structure 3. In contrast, iodide acts as terminal ligand towards tetrahedral Cd(II), and hence 2 and 4 are single-stranded 1D zig-zag polymers. In comparison to the uncoordinated heteroaromatic L1 and 12, the Cd coordination polymers show slightly red-shifted luminescence spectra of significantly higher intensity due to the more rigid arrangement of the It systems. (C) 2017 Elsevier Ltd. All rights reserved.

Source

Polyhedron

Volume

133

URI

https://doi.org/10.1016/j.poly.2017.05.023
https://hdl.handle.net/20.500.12712/12243

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  • Scopus İndeksli Yayınlar Koleksiyonu [14046]
  • WoS İndeksli Yayınlar Koleksiyonu [12971]



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