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 SM ISO690:2012LOZOVAN, 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 |
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| Volumul 45 / 2019 / ISSN - /ISSNe 1070-3284 | ||||||
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| DOI:https://doi.org/10.1134/S107032841901007X | ||||||
| Pag. 11-21 | ||||||
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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. |
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| Cuvinte-cheie azine ligands, coordination polymers, crystal structure, Luminescence |
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<cfAbstr cfLangCode='EN' cfTrans='o'><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' 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 <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 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></cfAbstr>
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