Jean-Claude Bunzli - Biphenylene-bridged mesostructured organosilica as a novel hybrid host material for Ln(III) (Ln = Eu, Gd, Tb, Er, Yb) ions in the presence of 2-thenoyltrifluoroacetone

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  Publication Details (including relevant citation   information):

  Biju,S., Eom,Y.K., Bunzli,J.C.G., Kim,H.K. Journal of   Materials Chemistry C 2013 1 (21)   3454-3466

  Abstract: A hierarchically ordered   4,4'-biphenylene-bridged mesoporous organosilica framework   (Bp-PMO) has been synthesized with the aim of using it as a new   hybrid host for Ln(III) ions. A series of novel organic-inorganic   luminescent hybrid materials have been obtained by covalently   linking Ln(III) complexes (Ln = Eu, Gd, Tb, Er, and Yb) to Bp-PMO   functionalized with 2-thenoyltrifluoroacetone (HTTA). The visible   and NIR photoluminescence studies of the hybrid materials show   that Bp-PMO acts both as an inorganic host and an organic   co-sensitizer for Ln(III) ions. The intrinsic quantum yield and   lifetime data obtained for the hybrid material containing Eu-III   (54.5% and 615 mu s) are among the highest values reported for   hybrid materials containing Eu(III)tetrakis(beta-diketonate)   complexes. The combination of Bp-PMO and HTTA also provides   sizable sensitization for Tb-III, Er-III and Yb-III ions. The   overall quantum yields and lifetime measurements for mixed   metallic hybrid materials show that Ln -> Ln' energy transfer   occurs in the mixed lanthanide systems. In addition, controlling   the Ln/Ln' ratio allows one to tune the emission colour

  Address (URL): WOS:000318636200011