Coordination Polymers of Zn and Cd Based on Two Isomeric Azine Ligands: Synthesis, Crystal Structures, and Luminescence Properties
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LOZOVAN, Vasile, COROPCEANU, Eduard, BOUROSH, Pavlina, MICU, Alexandru, FONARI, Marina. Coordination Polymers of Zn and Cd Based on Two Isomeric Azine Ligands: Synthesis, Crystal Structures, and Luminescence Properties. In: Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya, 2019, vol. 45, pp. 11-21. ISSN -. DOI: https://doi.org/10.1134/S107032841901007X
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Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya
Volumul 45 / 2019 / ISSN - /ISSNe 1070-3284

Coordination Polymers of Zn and Cd Based on Two Isomeric Azine Ligands: Synthesis, Crystal Structures, and Luminescence Properties

DOI:https://doi.org/10.1134/S107032841901007X

Pag. 11-21

Lozovan Vasile12, Coropceanu Eduard12, Bourosh Pavlina23, Micu Alexandru3, Fonari Marina3
 
1 Institute of Chemistry,
2 Tiraspol State University,
3 Institute of Applied Physics
 
 
Disponibil în IBN: 1 iulie 2019


Rezumat

Abstract: Metal-organic 1D coordination polymers of Zn(II) and Cd(II), [{Zn(3-Bphz)(H 2 O) 4 }(3-Bphz)(NO 3 ) 2 ] n (I), [Zn(3-Bphz)I 2 ] n (II), [Cd(3-Bphz)I 2 ] n (III), [Cd(4-Bphz)(CH 3 COO) 2 (H 2 O)] n (IV), and [Cd(4-Bphz)(NO 3 ) 2 (H 2 O) 2 ] n (V), containing azines of the N,N' type, 1,2-bis(pyridin-3-ylmethylene)hydrazine (3-Bphz) and 1,2-bis(pyridin-4-ylmethylene)hydrazine (4-Bphz), as bridging ligands are synthesized. The compositions and structures of the compounds are confirmed by the data of elemental analysis, IR and NMR spectroscopy, and single-crystal X-ray diffraction analysis (CIF files CCDC nos. 1812634–1812638 for I–V). Coordination polymers I–III have zigzag structures. The octahedral environment of the Zn 2+ ion in compound I is formed by two 3-Bphz ligands and four water molecules. The external sphere contains nitrate anions and uncoordinated 3-Bphz molecules. In isomorphous compounds II and III, the tetrahedral environment of the metal is formed by two nitrogen atoms of two bridging 3-Bphz ligands and two iodine atoms. Coordination polymers IV and V are linear. The coordination polyhedron of the Cd 2+ ion in compound IV is a pentagonal bipyramid, two vertices of which are occupied by the nitrogen atoms of two 4-Bphz molecules, and the equatorial plane is formed by two bidentate-chelating acetate anions and one water molecule. In compound V, the octahedral environment of the Сd 2+ ion is formed by two molecules of the 4-Bphz ligand, two monodentate nitrate anions, and two water molecules. All complexes are weak luminophores emitting in the blue-green spectral range.

Cuvinte-cheie
azine ligands, coordination polymers, crystal structure, Luminescence

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<dc:creator>Lozovan, V.</dc:creator>
<dc:creator>Coropceanu, E.B.</dc:creator>
<dc:creator>Bouroş, P.N.</dc:creator>
<dc:creator>Micu, A.V.</dc:creator>
<dc:creator>Fonari, M.S.</dc:creator>
<dc:date>2019-01-01</dc:date>
<dc:description xml:lang='en'><p>Abstract: Metal-organic 1D coordination polymers of Zn(II) and Cd(II), [{Zn(3-Bphz)(H <sub>2</sub> O) <sub>4</sub> }(3-Bphz)(NO <sub>3</sub> ) <sub>2</sub> ] <sub>n</sub> (I), [Zn(3-Bphz)I <sub>2</sub> ] <sub>n</sub> (II), [Cd(3-Bphz)I <sub>2</sub> ] <sub>n</sub> (III), [Cd(4-Bphz)(CH <sub>3</sub> COO) <sub>2</sub> (H <sub>2</sub> O)] <sub>n</sub> (IV), and [Cd(4-Bphz)(NO <sub>3</sub> ) <sub>2</sub> (H <sub>2</sub> O) <sub>2</sub> ] <sub>n</sub> (V), containing azines of the N,N&#39; type, 1,2-bis(pyridin-3-ylmethylene)hydrazine (3-Bphz) and 1,2-bis(pyridin-4-ylmethylene)hydrazine (4-Bphz), as bridging ligands are synthesized. The compositions and structures of the compounds are confirmed by the data of elemental analysis, IR and NMR spectroscopy, and single-crystal X-ray diffraction analysis (CIF files CCDC nos.&nbsp;1812634&ndash;1812638 for I&ndash;V). Coordination polymers I&ndash;III have zigzag structures. The octahedral environment of the Zn <sup>2+</sup> ion in compound I is formed by two 3-Bphz ligands and four water molecules. The external sphere contains nitrate anions and uncoordinated 3-Bphz molecules. In isomorphous compounds II and III, the tetrahedral environment of the metal is formed by two nitrogen atoms of two bridging 3-Bphz ligands and two iodine atoms. Coordination polymers IV and V are linear. The coordination polyhedron of the Cd <sup>2+</sup> ion in&nbsp;compound IV is a pentagonal bipyramid, two vertices of which are occupied by the nitrogen atoms of two 4-Bphz molecules, and the equatorial plane is formed by two bidentate-chelating acetate anions and one water molecule. In compound V, the octahedral environment of the Сd <sup>2+</sup> ion is formed by two molecules of the 4-Bphz ligand, two monodentate nitrate anions, and two water molecules. All complexes are weak luminophores emitting in the blue-green spectral range.</p></dc:description>
<dc:identifier>10.1134/S107032841901007X</dc:identifier>
<dc:source>Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya  () 11-21</dc:source>
<dc:subject>azine ligands</dc:subject>
<dc:subject>coordination polymers</dc:subject>
<dc:subject>crystal structure</dc:subject>
<dc:subject>Luminescence</dc:subject>
<dc:title>Coordination Polymers of Zn and Cd Based on Two Isomeric Azine Ligands: Synthesis, Crystal Structures, and Luminescence Properties</dc:title>
<dc:type>info:eu-repo/semantics/article</dc:type>
</oai_dc:dc>