EL JAZOULI, Abdelaziz; TBIB, B.; DEMOURGUES, Alain; GAUDON, Manuel

doi:10.1016/j.dyepig.2013.11.021

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EL JAZOULI, Abdelaziz
Laboratoire de Chimie des Matériaux Solides

TBIB, B.
Laboratoire de Chimie des Matériaux Solides

DEMOURGUES, Alain
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Dyes and Pigments. 2014, vol. 104, p. 67-74

Elsevier

Résumé en anglais

A series of diphosphate compounds of SrZn1−xMxP2O7 composition (M = Co, Ni, Cu) has been prepared by a conventional ceramic route. In this low cost and easily prepared series, the zinc site is five-coordinated with square pyramid geometry. The members of the whole solid solutions exhibit bright coloration due to the pyramidal crystal field around the M2+ chromophore. The systematic investigation for these chromophores with d7, d8 and d9 electronic configuration allows obtaining various site distortions (characterized from X-ray diffraction) and original colorations like the orange nickel-doped compounds, the bright cyan copper-doped compounds or the grey cobalt-doped compounds. In these latter, while a part of strontium is substituted for barium of calcium, the grey coloration can be shift on the green to red colorimetric parameter axis, recalling somewhat the "alexandrite effect".< Réduire

Mots clés

Pigment

Diphosphate

Transition metals

Color

Diffuse reflectance

Square pyramid

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Structure and colour of diphosphate pigments with square pyramid environment around chromophore ions (Co2+, Ni2+, Cu2+)

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