Five triboluminescent mixed-ligand complexes of Eu^(3+)with thenoyltrifluoroacetone(TTA)and pyridine-N-oxide or its substitutive derivatives have been prepared.They are all pale yellow crystalline com- pounds with the...Five triboluminescent mixed-ligand complexes of Eu^(3+)with thenoyltrifluoroacetone(TTA)and pyridine-N-oxide or its substitutive derivatives have been prepared.They are all pale yellow crystalline com- pounds with the formula of Eu(TTA)_3·L(L=py NO.2-pie NO,3-pie NO,4-pic NO,bipy N_2O_2).Their physico-chemical properties have been studied with conductometry,UV and IR absorption and fluorescence spectroscopy.Once the complexes are touched or rubbed by a glass rod,they emit strong red triboluminescent light which is similar to the characteristic fluorescence of Eu^(3+).展开更多
Eu(NO_3)(TTA)_2(TPPO)_2 (TTA=thenoyltrifluoroacetone,TPPO=triphenylphosphine oxide), M=1212.90,triclinic P1,a=1.1081(2)nm,b=1.1857(2)nm,c=1.2580(2)nm,α=65.54(1)°,β=77.91 (1)°,γ=61.99(1)°;Z=1,V=1.3281...Eu(NO_3)(TTA)_2(TPPO)_2 (TTA=thenoyltrifluoroacetone,TPPO=triphenylphosphine oxide), M=1212.90,triclinic P1,a=1.1081(2)nm,b=1.1857(2)nm,c=1.2580(2)nm,α=65.54(1)°,β=77.91 (1)°,γ=61.99(1)°;Z=1,V=1.3281(4)nm^3,D_c=1.47g/cm^3,μ_(MoK_α)=14.1 cm^(-1).The crystal desplays triboluminescence upon fracture.Structure study shows that the crystal is noncentrosymmetric and no disor- der is found.It is concluded that the polarity of crystals is necessary for the observation of triboluminescence.展开更多
文摘Five triboluminescent mixed-ligand complexes of Eu^(3+)with thenoyltrifluoroacetone(TTA)and pyridine-N-oxide or its substitutive derivatives have been prepared.They are all pale yellow crystalline com- pounds with the formula of Eu(TTA)_3·L(L=py NO.2-pie NO,3-pie NO,4-pic NO,bipy N_2O_2).Their physico-chemical properties have been studied with conductometry,UV and IR absorption and fluorescence spectroscopy.Once the complexes are touched or rubbed by a glass rod,they emit strong red triboluminescent light which is similar to the characteristic fluorescence of Eu^(3+).
文摘Eu(NO_3)(TTA)_2(TPPO)_2 (TTA=thenoyltrifluoroacetone,TPPO=triphenylphosphine oxide), M=1212.90,triclinic P1,a=1.1081(2)nm,b=1.1857(2)nm,c=1.2580(2)nm,α=65.54(1)°,β=77.91 (1)°,γ=61.99(1)°;Z=1,V=1.3281(4)nm^3,D_c=1.47g/cm^3,μ_(MoK_α)=14.1 cm^(-1).The crystal desplays triboluminescence upon fracture.Structure study shows that the crystal is noncentrosymmetric and no disor- der is found.It is concluded that the polarity of crystals is necessary for the observation of triboluminescence.
