We synthesized and characterized three types of isostructural iodoargentates, [TM(phen) 3 ]Ag 2 I 4 •3DMF (TM = Co (1), Ni (2), Zn (3)), [TM(phen) 3 ]Ag 3 I 5 •DMF (TM = Co (4), Ni (5), Zn (6)), and [TM(phen) 3 ] 2 Ag 8 I 12 •7DMF (TM = Co (7), Ni (8), Zn ( 9)) (phen = 1,10-phenanthroline, DMF = dimethylformamide) using transition-metal (TM) complexes as the structuredirecting agents. Compounds 1−3 and compounds 4−6 feature zero-dimensional anionic [Ag 4 I 8 ] 4− and [Ag 6 I 10 ] 4− clusters, respectively. All of the [TM(phen) 3 ] 2+ cations in compounds 1−6 are arranged into a two-dimensional (2D) (6,3) net layer. Interestingly, compounds 1−3 are kinetically unstable in the mother solution, and they can be converted to compounds 4−6 via irreversible single-crystal to single-crystal transformation processes, respectively, with distinct changes in the crystal morphology and structure. Compounds 7−9 feature one-dimensional (1D) zigzag chains constructed from [Ag 8 I 12 ] 4− units. The UV−vis diffuse reflectance measurements demonstrate that compounds 1−9 possess the characteristics of semiconductors with band gaps of 2.58− 2.71 eV and visible-light-irradiation-induced photocatalytic activities. Especially, compound 3 possesses higher photocatalytic degradation activity toward crystal violet (CV) and rhodamine B (RhB) in comparison to P25 under identical conditions. Moreover, the mechanism study reveals that the TM complex cations make a great contribution to the photocatalytic activity.
We develop a single quantum dot-based fluorescence resonance energy transfer biosensor for antibody-free detection of ten-eleven translocation 1 (TET1). This biosensor can sensitively detect TET1 in a homogeneous manner without...
Luminescence D 6540Crystal Structure and Photoluminescence of Tb 3+ Doped Y3GaO6. -The solid solution (Y 1-x Tb x ) 3 GaO 6 (x = 0-0.5) is prepared by solid state reaction using Tb 2 O 3 , Y2O3, and Ga2O3 as starting materials (1200°C 24 h). The samples are characterized by powder XRD and photoluminescence spectroscopy. They crystallize isostructurally with Gd3GaO6 in the orthorhombic space group Cm21. The materials exhibit strong green color emission at about 543 nm at room and liquid nitrogen temperatures. The sharp and strong emission and long lifetime of (Y 1-x Tb x ) 3 GaO 6 indicates that Y 3 GaO 6 is a potential phosphor and laser crystal host material. -(LIU*, F. S.; LIU, Q. L.; LIANG, J. K.; LUO, J.; YANG, L. T.; SONG, G. B.; ZHANG, Y.; WANG, L. X.; YAO, J. N.; RAO, G. H.; J. Alloys Compd. 425 (2006) 1-2, 278-283; Dep. Mater. Sci. Eng.,
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