Biphenylene-bridged mesostructured organosilica as a novel hybrid host material for LnIII (Ln = Eu, Gd, Tb, Er, Yb) ions in the presence of 2-thenoyltrifluoroacetone
Biphenylene-bridged mesostructured organosilica as a novel hybrid host material for LnIII (Ln = Eu, Gd, Tb, Er, Yb) ions in the presence of 2-thenoyltrifluoroacetone
作者:Silvanose Biju、Yu Kyung Eom、Jean-Claude G. Bünzli、Hwan Kyu Kim
DOI:10.1039/c3tc30459k
日期:——
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 LnIII ions. A series of novel organic–inorganic luminescent hybrid materials have been obtained by covalently linking LnIII 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 LnIII ions. The intrinsic quantum yield and lifetime data obtained for the hybrid material containing EuIII (54.5% and 615 μs) are among the highest values reported for hybrid materials containing EuIIItetrakis(β-diketonate) complexes. The combination of Bp-PMO and HTTA also provides sizable sensitization for TbIII, ErIII and YbIII 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.
Full-color emission of a Eu<sup>3+</sup>-based mesoporous hybrid material modulated by Zn<sup>2+</sup> ions: emission color changes for Zn<sup>2+</sup> sensing <i>via</i> an ion exchange approach
作者:Zheng Zhang、Heng Li、Yajuan Li、Xudong Yu
DOI:10.1039/c9dt01668f
日期:——
concentration of Zn2+ ions in the water solution of Eu(TTA-MSN)2L, a tunable full-color emission (including white-light emission) can be generated under single-wavelength excitation. To our knowledge, this effort is the first example of a multicolor emissive sensor for Zn2+ ions in water solutions based on lanthanidemesoporoushybrid material.