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Discrete polynuclear manganese(II) complexes with thiacalixarene ligands: synthesis, structures and photophysical properties

Published inDalton transactions, vol. 44, no. 17, p. 7991-8000
Publication date2015
Abstract

The synthesis, crystal structure and photophysical properties of the new compound [Mn4(ThiaSO2)2F][K(18-crown-6)], ThiaSO2 = p-tertbutylsulphonylcalix[4]arene, are presented and compared to the ones of [Mn4(ThiaSO2)2F]K. The strong orange luminescence is attributed to the Mn2+ centred 4T1 → 6A1 transition. Its temperature and pressure dependence and quenching by molecular dioxygen are reported. The latter is attributed to energy transfer from the 4T1 state exciting dioxygen to its 1Σ+g state. In the solid state, the quenching is much more efficient in [Mn4(ThiaSO2)2F][K(18-crown-6)] than in [Mn4(ThiaSO2)2F]K. This is attributed to the open pore structure of the former allowing fast diffusion of dioxygen into the crystal lattice.

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Citation (ISO format)
SUFFREN, Yan Jonathan Mathieu et al. Discrete polynuclear manganese(II) complexes with thiacalixarene ligands: synthesis, structures and photophysical properties. In: Dalton transactions, 2015, vol. 44, n° 17, p. 7991–8000. doi: 10.1039/C5DT00827A
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ISSN of the journal1477-9226
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