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

作者：Suffren Yan^*; O'Toole Niall; Hauser Andreas; Jeanneau Erwann; Brioude Arnaud; Desroches Cedric

来源：Dalton Transactions, 2015, 44(17): 7991-8000.

DOI：10.1039/c5dt00827a

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

• 出版日期2015