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Chromotropism in halo-bridged dimers. Structural characterization of bis(μ-halo)bis(halo N-(pyridin-2-ylmethyl)cyclohexanamine copper(II)).
In: Journal of Coordination Chemistry, Jg. 69 (2016-11-01), Heft 21, S. 3192-3205
Online
academicJournal
Zugriff:
Two dinuclear copper(II) complexes, [LCu(μ-Cl)Cl]2(DMF) (1) and [LCu(μ-Br)Br]2(2), with the bidentate ligandN-(pyridin-2-ylmethyl)cyclohexanamine, L, were synthesized and characterized by physicochemical and spectroscopic (IR, UV–vis) data. The crystal structural analysis of1shows that both copper(II) ions are in a distorted square pyramidal N2Cl3environment with the apical position of the copper(II) being occupied by the bridging chloride anion which is equatorial to the other copper ion, forming a dimeric copper(II) complex. The chromotropic properties of both complexes, including solvato-, thermo-, and halochromism, were investigated. The complexes show reversible thermochromism in solution which is irreversible in the solid state. It was found that the solvatochromism is due to structural change followed by solvation of the vacant sites of the complexes. Their halochromic properties were studied in pH range of 1–11 by visible absorption spectroscopy. The color changes from blue to green and to colorless are due to deprotonation and protonation of the ligands. [ABSTRACT FROM PUBLISHER]
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Titel: |
Chromotropism in halo-bridged dimers. Structural characterization of bis(μ-halo)bis(halo N-(pyridin-2-ylmethyl)cyclohexanamine copper(II)).
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Autor/in / Beteiligte Person: | Golchoubian, Hamid ; Nateghi, Samira |
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Zeitschrift: | Journal of Coordination Chemistry, Jg. 69 (2016-11-01), Heft 21, S. 3192-3205 |
Veröffentlichung: | 2016 |
Medientyp: | academicJournal |
ISSN: | 0095-8972 (print) |
DOI: | 10.1080/00958972.2016.1227972 |
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