Synthesis and structures of copper(II) coordination compounds with isomers of cyclic triimidazole and their derivatives
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MELNIK, E., KRAVTSOV, Victor, FORNI, Alessandra, LUCENTI, Elena, CARIATI, Elena, FONARI, Marina. Synthesis and structures of copper(II) coordination compounds with isomers of cyclic triimidazole and their derivatives. In: Achievements and perspectives of modern chemistry, 9-11 octombrie 2019, Chişinău. Chisinau, Republic of Moldova: Tipografia Academiei de Ştiinţe a Moldovei, 2019, p. 128. ISBN 978-9975-62-428-2.
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Achievements and perspectives of modern chemistry 2019
Conferința "International Conference "Achievements and perspectives of modern chemistry""
Chişinău, Moldova, 9-11 octombrie 2019

Synthesis and structures of copper(II) coordination compounds with isomers of cyclic triimidazole and their derivatives


Pag. 128-128

Melnik E.1, Kravtsov Victor1, Forni Alessandra23, Lucenti Elena32, Cariati Elena43, Fonari Marina1
 
1 Institute of Applied Physics,
2 ISTM-CNR, Istituto di Scienze e Tecnologie Molecolari,
3 INSTM-UdR Milano,
4 University of Milan
 
 
Disponibil în IBN: 7 noiembrie 2019


Rezumat

The assembling of organic and inorganic components with emissive properties into new hybrid materials can provide multifunctional smart luminescent coordination networks [1]. Cyclic triimidazole (triimidazo[1,2-a:1',2'-c:1'',2''-e][1,3,5]triazine, L1) and its derivatives with pyridinic functional groups are useful tectons for molecular design. These molecules actively contribute to intermolecular stacking, making them useful participants for syntheses of new materials with intriguing supramolecular architectures. Recently, the inherent photoluminescent properties of cyclic triimidazole (L1) have been demonstrated [2], and some copper(I) halide coordination networks with this ligand have been reported [3]. Motivated by these results, we have prepared new coordination compounds starting from copper(II) acetate dihydrate and three triimidazole L1-L3 derivatives in a CH3CN/CH3OH/dmf solvent mixture. They include: one mono- [Cu(L2)2(CH3COO)2], 1, andtwo dinuclear [Cu2(L1)2(CH3COO)4], 2 and [Cu2(L3)2(CH3COO)4], 3 complexes. Compounds 1 and 3 crystallize in the triclinic space group P-1, and compound 2 crystallizes in the monoclinic space group P21/c. All compounds are centrosymmetric. The Cu(II) atom in centrosymmetric complex 1 has the N2O4 square-bipyramidal coordination core provided by two L2 ligands that coordinate in a monodentate mode, and bidentate chelate CH3COO- anions. The centrosymmetric dinuclear complexes 2 and 3 include paddle-wheel acetate dimer due to bridging function of four acetate anions, and capped by L1 or L3 in axial positions being mono-coordinated via imidazole nitrogen, Cu-N distances equal 2.217 and 2.238Å, respectively. The presence of stacking motifs in the reported coordination compounds responsible for the emission of free ligands [2] is a promising event for the ongoing research. Figure. Fragment of crystal packing in 2