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Issue 25, 2014
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Phosphorescence quantum yield enhanced by intermolecular hydrogen bonds in Cu4I4 clusters in the solid state

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Abstract

Organo-copper(I) halide complexes with a Cu4I4 cubane core and cyclic amines as ligands have been synthesized and their crystal structures have been defined. Their solid state photophysical properties have been measured and correlated with the crystal structure and packing. A unique and remarkably high luminescence quantum yield (76%) has been measured for one of the complexes having the cubane clusters arranged in a columnar structure and held together by N–H⋯I hydrogen bonds. This high luminescence quantum yield is correlated with a slow radiationless deactivation rate of the excited state and suggests a rather strong enhancement of the cubane core rigidity bestowed by the hydrogen bond pattern. Some preliminary thin film deposition experiments show that these compounds could be considered to be good candidates for applications in electroluminescent devices because of their bright luminescence, low cost and relatively easy synthesis processes.

Graphical abstract: Phosphorescence quantum yield enhanced by intermolecular hydrogen bonds in Cu4I4 clusters in the solid state

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Publication details

The article was received on 21 Jan 2014, accepted on 10 Apr 2014 and first published on 11 Apr 2014


Article type: Paper
DOI: 10.1039/C4DT00218K
Dalton Trans., 2014,43, 9448-9455

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    Phosphorescence quantum yield enhanced by intermolecular hydrogen bonds in Cu4I4 clusters in the solid state

    P. P. Mazzeo, L. Maini, A. Petrolati, V. Fattori, K. Shankland and D. Braga, Dalton Trans., 2014, 43, 9448
    DOI: 10.1039/C4DT00218K

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