The title compound (C17H16O2, Mr = 252.30) crystallizes in the monoclinic system, space group P21/c with a = 11.5763(14), b = 11.0321(11), c = 11.5094(13) ?, β = 114.581(3)o, V = 1336.7(3) ?3 , Z = 4, Dc = 1.254 g/...The title compound (C17H16O2, Mr = 252.30) crystallizes in the monoclinic system, space group P21/c with a = 11.5763(14), b = 11.0321(11), c = 11.5094(13) ?, β = 114.581(3)o, V = 1336.7(3) ?3 , Z = 4, Dc = 1.254 g/cm3, μ(MoKa) = 0.081 cm-1 and F(000) = 536.00. The final R and wR are 0.0527 and 0.1285, respectively for 3058 observed reflections (I > 2σ(I)). In the title molecule, two phenyl rings are rotated oppositely with respect to the central part C(1)–C(2)=C(3)– C(4) (plane 3) and the dihedral angle between them is 14.8o. The phenone O(1) atom deviates from plane 3 by 0.291 ?. In the crystal the molecules form H-bond chains of R2 (6) and R2 (5) types 1 1 along [001]. The molecule chains interacted through three cooperative C–H…O H-bonds (R3 (11)) 1 in the ‘bay area’ (Fig. 3), extending along [010] and forming layer (100). Between the layers, there exist C–H/π interactions along [101]. Studies on the cooperative C–H…O H-bonds R3 (11) in the 1 similar crystals are also presented.展开更多
The presented study concerned up-converting core/shell type nanomaterials based on lanthanide（Ⅲ） ions, Ln（Ⅲ）, doped orthoborates. The system studied composed of the GdBO3 doped with Yb^3＋/Tb^3＋ luminescent cor...The presented study concerned up-converting core/shell type nanomaterials based on lanthanide（Ⅲ） ions, Ln（Ⅲ）, doped orthoborates. The system studied composed of the GdBO3 doped with Yb^3＋/Tb^3＋ luminescent core ensured an effective cooperative sensitization up-conversion, resulting in a bright green luminescence. The silica coating process was performed by a modified St？ber method, which resulted in the formation of core-shell nanostructures, making them suitable for bioapplications. The nanophosphors and nanocomposites were obtained by various methods, such as co-precipitation in the presence of Triton X-100 and micelle synthesis with ethylenediaminetetraacetic acid（EDTA） as organic modifiers/surfactants. The synthesized nanomaterials were characterized with the use of powder X-ray diffraction（XRD）, infrared light absorption with Fourier transform FT-IR spectra, transmission electron microscopy（TEM）, up-conversion emission spectra under IR light, as well as excitation spectra, emission spectra and fluorescence lifetimes under UV light, and their photophysical properties were compared.展开更多
基金This research was supported by the Key Subject Foundation of Jiangsu Province(S1109001)
文摘The title compound (C17H16O2, Mr = 252.30) crystallizes in the monoclinic system, space group P21/c with a = 11.5763(14), b = 11.0321(11), c = 11.5094(13) ?, β = 114.581(3)o, V = 1336.7(3) ?3 , Z = 4, Dc = 1.254 g/cm3, μ(MoKa) = 0.081 cm-1 and F(000) = 536.00. The final R and wR are 0.0527 and 0.1285, respectively for 3058 observed reflections (I > 2σ(I)). In the title molecule, two phenyl rings are rotated oppositely with respect to the central part C(1)–C(2)=C(3)– C(4) (plane 3) and the dihedral angle between them is 14.8o. The phenone O(1) atom deviates from plane 3 by 0.291 ?. In the crystal the molecules form H-bond chains of R2 (6) and R2 (5) types 1 1 along [001]. The molecule chains interacted through three cooperative C–H…O H-bonds (R3 (11)) 1 in the ‘bay area’ (Fig. 3), extending along [010] and forming layer (100). Between the layers, there exist C–H/π interactions along [101]. Studies on the cooperative C–H…O H-bonds R3 (11) in the 1 similar crystals are also presented.
基金supported by the Polish Ministry of Science and Higher Education("Diamond Grant"Nr DI2011 011441)
文摘The presented study concerned up-converting core/shell type nanomaterials based on lanthanide（Ⅲ） ions, Ln（Ⅲ）, doped orthoborates. The system studied composed of the GdBO3 doped with Yb^3＋/Tb^3＋ luminescent core ensured an effective cooperative sensitization up-conversion, resulting in a bright green luminescence. The silica coating process was performed by a modified St？ber method, which resulted in the formation of core-shell nanostructures, making them suitable for bioapplications. The nanophosphors and nanocomposites were obtained by various methods, such as co-precipitation in the presence of Triton X-100 and micelle synthesis with ethylenediaminetetraacetic acid（EDTA） as organic modifiers/surfactants. The synthesized nanomaterials were characterized with the use of powder X-ray diffraction（XRD）, infrared light absorption with Fourier transform FT-IR spectra, transmission electron microscopy（TEM）, up-conversion emission spectra under IR light, as well as excitation spectra, emission spectra and fluorescence lifetimes under UV light, and their photophysical properties were compared.
