Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Luminescent monomeric and polymeric cuprous halide complexes with 1,2-bis(3,5-dimethylpyrazol-1-ylmethyl)-benzene as ligand

Language

English

Abstract

© 2015 Elsevier B.V.Abstract Reaction of cuprous bromide with equimolar amounts of 1,2-bis(3,5-dimethylpyrazol-1-ylmethyl)-benzene (dpb) affords a mononuclear three-coordinated complex [CuBr(dpb)] (F2) with dpb acting as a chelating ligand. In contrast, using cuprous iodide instead under the same conditions gives the polymeric compound [Cu2I2(dpb)]n (F1) which contains double-bridging iodine atoms. The complexes were characterized by element analysis and 1H NMR spectroscopy, and the crystal structures were determined by single-crystal X-ray diffraction methods. The Cu(I) complexes are luminescent in the solid state at ambient temperature. Intense orange emission for complex F1 is observed, with maxima at 593 nm, probably ascribed to a combination of a halide-to-metal charge transfer and copper-centered d → s, p transitions. F2 exhibits a blue photoluminescence, with emission maximum at 515 nm, assigned to metal-to-ligand charge-transfer excited states, probably mixed with some halide-to-ligand characters.

Keywords

Coordination polymers, Crystal structures, Cuprous halides, Luminescence

Publication Date

2015

Source Publication Title

Inorganic Chemistry Communications

Volume

58

Start Page

113

End Page

116

Publisher

Elsevier

DOI

10.1016/j.inoche.2015.06.014

ISSN (print)

13877003

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