title: Tetranuclear manganese(II) complexes of sulfonylcalix[4]arene macrocycles: synthesis, structure, spectroscopic and magnetic properties.
abstract: Two tetranuclear manganese(II) complexes {K(+)[Mn(4)(ThiaSO(2))(2)(OH)](-)} (1) and {K(+)[Mn(4)(ThiaSO(2))(2)(F)](-)} (2) have been synthesized under solvothermal conditions in methanol with p-tert-butylsulfonylcalix[4]arene (ThiaSO(2)). For both complexes, the structure has been established from single-crystal X-ray diffraction. The two complexes are best described as manganese squares sandwiched between two thiacalixarene macrocycles. In both complexes, in the center of the square formed by the four manganese(II) atoms, the unexpected presence of μ(4)-OH(-) or μ(4)-F(-) gives a negative charge to the cluster. The two tetranuclear complexes exhibit strong orange luminescence behavior resulting from the symbiosis between the ThiaSO(2) and the Mn(2+). Despite similar chemical formulation, (1) and (2) present difference in emission intensity and lifetime τ.
authors.affiliation: Laboratoire des Multimatériaux et Interfaces (UMR 5615) Université Claude Bernard Lyon1, Villeurbanne, France.
authors.forename: Meriem
authors.initials: M
authors.lastname: Lamouchi
authors.forename: Erwann
authors.initials: E
authors.lastname: Jeanneau
authors.forename: Anne
authors.initials: A
authors.lastname: Pillonnet
authors.forename: Arnaud
authors.initials: A
authors.lastname: Brioude
authors.forename: Matteo
authors.initials: M
authors.lastname: Martini
authors.forename: Olivier
authors.initials: O
authors.lastname: Stéphan
authors.forename: Faouzi
authors.initials: F
authors.lastname: Meganem
authors.forename: Ghenadie
authors.initials: G
authors.lastname: Novitchi
authors.forename: Dominique
authors.initials: D
authors.lastname: Luneau
authors.forename: Cédric
authors.initials: C
authors.lastname: Desroches