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Chromism, positional, conformational and structural isomerism in a series of Zn(II) and Cd(II) coordination polymers based on methylated azine N,N′-donor linkers

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dc.contributor.author LOZOVAN, Vasile
dc.contributor.author KRAVTSOV, Victor Ch.
dc.contributor.author GORINCIOI, Elena
dc.contributor.author ROTARU, Andrei
dc.contributor.author COROPCEANU, Eduard B.
dc.contributor.author SIMINEL, Nikita
dc.contributor.author FONARI, Marina S.
dc.date.accessioned 2023-10-06T08:05:56Z
dc.date.available 2023-10-06T08:05:56Z
dc.date.issued 2020
dc.identifier.citation LOZOVAN, Vasile, Ch. KRAVTSOV, Victor, GORINCIOI, Elena et al. Chromism, positional, conformational and structural isomerism in a series of Zn(II) and Cd(II) coordination polymers based on methylated azine N,N′-donor linkers. In: Polyhedron. 2020, vol. 180, sp. 114411. ISSN 0277-5387. en_US
dc.identifier.issn 0277-5387
dc.identifier.uri http://repository.utm.md/handle/5014/24367
dc.description Access full text - https://doi.org/10.1016/j.poly.2020.114411 en_US
dc.description.abstract Seven new coordination polymers [Zn(I)2(4-bpmhz)]n (1), [Cd(I)2(4-bpmhz)]n (2), [Zn(I)2(3-bpmhz)]n (3), [Cd(I)2(3-bpmhz)2]n (4), [Zn(NO3)2(H2O)2(4-bpmhz)]n·0.5n(EtOH) (5), [Cd(NO3)2(4-bpmhz)3/2(MeOH)]n·0.5nH2O (6) and [Zn(NO3)2(3-bpmhz)2]n (7) were prepared following the reactions of the zinc and cadmium iodide or nitrate salts with the methylated azine ligands of the bis-monodentate N,N′-donor type, 1,2-bis(1-(pyridin-4-yl)ethylidene)hydrazine (4-bpmhz) and 1,2-bis(1-(pyridin-3-yl)ethylidene)hydrazine (3-bpmhz). The single-crystal X-ray diffraction studies show that compounds 1–5, and 7 display 1D chain structures, while compound 6 shows a 2D coordination network, and both 4-bpmhz and 3-bpmhz act as bidentate bridging ligands. The crystals 1 and 2 are isomorphous, and differ by the metal cation only. The single coordination chains in 1–3 have zigzag structures; they are linear in 5, while 4 and 7 display similar double-chain structures. The crystal packing in 5 and 6 provides cavities occupied by solvent molecules, ethanol and water. The compounds were characterized in the solid state and in solution by spectroscopic (FTIR, UV–Vis, NMR) methods; the solid state emissive properties were studied for all compounds, while their thermal stability and behaviour were investigated by thermogravimetry under inert atmosphere, while the thermochromism for several compounds was registered and discussed. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/us/ *
dc.subject azine ligands en_US
dc.subject coordination polymers en_US
dc.subject spectroscopic studies en_US
dc.subject conformational isomerism en_US
dc.subject methylated azine linkers en_US
dc.title Chromism, positional, conformational and structural isomerism in a series of Zn(II) and Cd(II) coordination polymers based on methylated azine N,N′-donor linkers en_US
dc.type Article en_US


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