Tetra- and polynuclear cadmium(II) complexes with 3,5-bis(pyrimidin-2-yl)-4H-1,2,4-triazol-4-amine. Synthesis, polymorphism, lone pair-pi interactions and luminescence

Tetra- and polynuclear cadmium(II) complexes with 3,5-bis(pyrimidin-2-yl)-4H-1,2,4-triazol-4-amine. Synthesis, polymorphism, lone pair-pi interactions and luminescence Full article

Journal

Inorganica Chimica Acta
ISSN: 0020-1693 , E-ISSN: 1873-3255

Output data

Year: 2015, Volume: 425, Pages: 182-188 Pages count : DOI: 10.1016/j.ica.2014.10.017

Tags

N-ligands (1,2,4-triazole, pyrimidine); Cadmium(II); Coordination polymers; Polymorphism; Lone pair-pi interactions; Luminescence

Authors

Bushuev Mark B. ^1,2 , Gatilov Yuri V. ^2,3 , Krivopalov Viktor P. ³ , Shkurko Oleg P. ³

Affiliations

1	(Данные Web of science) Russian Acad Sci, Nikolaev Inst Inorgan Chem, Siberian Branch, Novosibirsk 630090, Russia
2	(Данные Web of science) Novosibirsk State Univ, Natl Res Univ, Dept Nat Sci, Novosibirsk 630090, Russia
3	(Данные Web of science) Russian Acad Sci, Siberian Branch, NN Vorozhtsov Novosibirsk Inst Organ Chem, Novosibirsk 630090, Russia

Cadmium(II) complexes, [CdLCl2](n) (1), alpha-{[CdLCl2]center dot H2O}(n) (2), beta-{[CdLCl2]center dot H2O}(n) (3), and [Cd4L2(H2O)(2)Cl-8]center dot 2H(2)O (4), with 3,5-bis(pyrimidin-2-yl)-4H-1,2,4-triazol-4-amine (L), have been synthesized. They are the first examples of structurally characterized metal complexes with L. In these structures, the ligand L adopts either bidentate (N-pyrimidine',N-triazole(1)) or bis-bidentate (N-pyrimidine',N-triazole(1),N-triazole(2),N-pyrimidine '') coordination. The complexes 1-3 are linear coordination polymers, the compounds 2 and 3 are polymorphs. The linear chains are assembled into 2D supramolecular structure due to pi-pi stacking interactions between practically planar L molecules. The structure of 4 consists of [Cd4L2(H2O)(2)Cl-8] complex molecules with mu(2)- and mu(3)-chlorido-bridged quasi-cubane tetracadmium core and non-coordinated water molecules. In the structure of 4, the intermolecular lone pair-pi interactions were observed between Cl atom and pi-deficient triazole ring. The photoluminescent properties of L, 3, and 4 were studied in the solid state. These compounds were found to display bright blue luminescence. The relative intensity of emission increases in the order L < [Cd4L2(OH2)(2)Cl-8]center dot 2H(2)O < beta-{[CdLCl2]center dot H2O}(n). (C) 2014 Elsevier B.V. All rights reserved.

Bushuev M.B. , Gatilov Y.V. , Krivopalov V.P. , Shkurko O.P.
Tetra- and polynuclear cadmium(II) complexes with 3,5-bis(pyrimidin-2-yl)-4H-1,2,4-triazol-4-amine. Synthesis, polymorphism, lone pair-pi interactions and luminescence
Inorganica Chimica Acta. 2015. V.425. P.182-188. DOI: 10.1016/j.ica.2014.10.017 WOS Scopus РИНЦ

Published print:

Jan 1, 2015

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