A new compound,5-(9-anthryl)-1,3-diphenyl-1H-pyrazol(ADPP),with an anthryl moiety as an emissive group and a diphenylpyrazoline moiety as a charge transporting group is designed and synthesized.The absorption,photolum...A new compound,5-(9-anthryl)-1,3-diphenyl-1H-pyrazol(ADPP),with an anthryl moiety as an emissive group and a diphenylpyrazoline moiety as a charge transporting group is designed and synthesized.The absorption,photoluminescence,electroluminescence,and electrochemistry are measured.Absorption of ADPP is similar to that of anthracene in the vibonic structure but shows slight red shifts because anthryl moiety twists strongly with respect to pyrazol moiety although delocalization still exists between the two moieties.Light emitting devices fabricated with ADPP show a bright blue emission at 470 nm.The turn-on voltage is 12 V and the light emission follows the current closely,indicating an efficient charge injection and transport for both electrons and holes.展开更多
(2,4 C 7H 11 ) 2Yb·DME was synthesized by the reaction of YbCl 3 with K(2,4 C 7H 11 )(2,4 dimethylpentadienyl potassium), and the single crystal X ray diffraction showed that the complex exists in a cis staggered...(2,4 C 7H 11 ) 2Yb·DME was synthesized by the reaction of YbCl 3 with K(2,4 C 7H 11 )(2,4 dimethylpentadienyl potassium), and the single crystal X ray diffraction showed that the complex exists in a cis staggered conformation. The crystal of the compound belongs to the monoclinic space group P2 1/n with a =0.875 2 (1) nm, b =1.490 6(1) nm, c =1.529 3(2) nm, β =97 55(2)° , V =1.977 79(4) nm 3, Z =4, F (000)=735.8 e, μ =49.49 cm -1 , R =0.033 and R w=0.032 . The title complex can be used as a catalyst for the polymerization of methyl methacrylate(MMA).展开更多
Enantiomeric four chelated planar square schiff base Cu 2+ and Ni 2+ complexes were synthesized using ( 1R,trans ) and ( 1S,trans) N,N bis(2 hydroxyphenyl methylene) 1,2 diaminocyclohexane. Th...Enantiomeric four chelated planar square schiff base Cu 2+ and Ni 2+ complexes were synthesized using ( 1R,trans ) and ( 1S,trans) N,N bis(2 hydroxyphenyl methylene) 1,2 diaminocyclohexane. The chirality could not be shown by usual UV Vis spectra. The intrinsic chiral difference of the enantiomeric complexes can be displayed by circular dichroism(CD) spectra. The Cotton effect of every polarlight sensitive absorption of one enantiomer will be the opposite of that of the other enantiomer. It was found that no tetrahedron form exists for Ni 2+ complexes, which was determined with UV Vis spectra and Electron Paramagnetic Resonance(EPR) measures.展开更多
EHMO method has been used to calculate the electronic structure of PD_2ML compounds (PD-pentadienyl or methyl-substituted one, M-transition metal atom, L-Lewis base). Compared with CP_2M (CP-cyclopentadienyl), fragmen...EHMO method has been used to calculate the electronic structure of PD_2ML compounds (PD-pentadienyl or methyl-substituted one, M-transition metal atom, L-Lewis base). Compared with CP_2M (CP-cyclopentadienyl), fragment orbitals of PD_2M serve as starting point for general account of the effects of forming M-L bonds on configuration, conformation and stability of PD_2- ML compounds.展开更多
文摘A new compound,5-(9-anthryl)-1,3-diphenyl-1H-pyrazol(ADPP),with an anthryl moiety as an emissive group and a diphenylpyrazoline moiety as a charge transporting group is designed and synthesized.The absorption,photoluminescence,electroluminescence,and electrochemistry are measured.Absorption of ADPP is similar to that of anthracene in the vibonic structure but shows slight red shifts because anthryl moiety twists strongly with respect to pyrazol moiety although delocalization still exists between the two moieties.Light emitting devices fabricated with ADPP show a bright blue emission at 470 nm.The turn-on voltage is 12 V and the light emission follows the current closely,indicating an efficient charge injection and transport for both electrons and holes.
文摘(2,4 C 7H 11 ) 2Yb·DME was synthesized by the reaction of YbCl 3 with K(2,4 C 7H 11 )(2,4 dimethylpentadienyl potassium), and the single crystal X ray diffraction showed that the complex exists in a cis staggered conformation. The crystal of the compound belongs to the monoclinic space group P2 1/n with a =0.875 2 (1) nm, b =1.490 6(1) nm, c =1.529 3(2) nm, β =97 55(2)° , V =1.977 79(4) nm 3, Z =4, F (000)=735.8 e, μ =49.49 cm -1 , R =0.033 and R w=0.032 . The title complex can be used as a catalyst for the polymerization of methyl methacrylate(MMA).
文摘Enantiomeric four chelated planar square schiff base Cu 2+ and Ni 2+ complexes were synthesized using ( 1R,trans ) and ( 1S,trans) N,N bis(2 hydroxyphenyl methylene) 1,2 diaminocyclohexane. The chirality could not be shown by usual UV Vis spectra. The intrinsic chiral difference of the enantiomeric complexes can be displayed by circular dichroism(CD) spectra. The Cotton effect of every polarlight sensitive absorption of one enantiomer will be the opposite of that of the other enantiomer. It was found that no tetrahedron form exists for Ni 2+ complexes, which was determined with UV Vis spectra and Electron Paramagnetic Resonance(EPR) measures.
文摘EHMO method has been used to calculate the electronic structure of PD_2ML compounds (PD-pentadienyl or methyl-substituted one, M-transition metal atom, L-Lewis base). Compared with CP_2M (CP-cyclopentadienyl), fragment orbitals of PD_2M serve as starting point for general account of the effects of forming M-L bonds on configuration, conformation and stability of PD_2- ML compounds.
