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

Authors
O'Toole, Niall
Jeanneau, Erwann
Brioude, Arnaud
Desroches, Cédric
Published in Dalton Transactions. 2015, vol. 44, no. 17, p. 7991-8000
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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Other version: http://xlink.rsc.org/?DOI=C5DT00827A
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Research group Groupe Hauser
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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. https://archive-ouverte.unige.ch/unige:72656

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Deposited on : 2015-05-19

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