[Zn(POM)_2Br_2](POM is 3-Methyl-4-Nitropyridine-1-Oxide),C_(12)H_(12)Br_2N_4O_6Zn, Mr=533.44,triclinic,P1,a=11.450(3),b=13.027(2),c=6.605(1),α=101.25(1),β=96.96(2), γ=108.06(2)°,V=901.2(4)~3,Z=2,D_c=1.97g·...[Zn(POM)_2Br_2](POM is 3-Methyl-4-Nitropyridine-1-Oxide),C_(12)H_(12)Br_2N_4O_6Zn, Mr=533.44,triclinic,P1,a=11.450(3),b=13.027(2),c=6.605(1),α=101.25(1),β=96.96(2), γ=108.06(2)°,V=901.2(4)~3,Z=2,D_c=1.97g·cm^(-3),(MoK_α)=0.71069,F(000)=520, μ=58.21cm^(-1),final R=0.040 for 2192 observed reflections,T=296K.The compound is a mononuclear complex,containing a tetrahedrally coordinated zinc atom.展开更多
The SHG effects of substituted 3-thienyl chalcone compounds weremeasured. The relationship between structure and effect of substituted 3-thienyl chal-cone derivatives and substituted 2-thienyl chalcone derivatives wer...The SHG effects of substituted 3-thienyl chalcone compounds weremeasured. The relationship between structure and effect of substituted 3-thienyl chal-cone derivatives and substituted 2-thienyl chalcone derivatives were discussed. It isshown that their properties of high SHG efficient are similar to each other and the sub-stituted 3-thienyl chalcone molecules are easier to form non-centrosymmetric crystalstructure than substituted 2-thienyl chalcone molecules.展开更多
A new organic single crystal of β-Alanine Oxalate (BAO) has been grown from solution by slow evaporation technique. Transparent, colourless crystals of size upto 11 × 9 × 4 mm3 were obtained. Formation of t...A new organic single crystal of β-Alanine Oxalate (BAO) has been grown from solution by slow evaporation technique. Transparent, colourless crystals of size upto 11 × 9 × 4 mm3 were obtained. Formation of the new crystal has been confirmed by single crystal XRD and FTIR spectra. The grown crystals have been subjected to powder X-ray diffraction studies to identify the crystalline nature. Single crystal X-ray diffractometer was utilized to measure unit cell parameters and to confirm the crystal structure. BAO belongs to monoclinic system with lattice parameters a = 22.335 ?, b = 5.697 ?, c = 13.993 ?, α = 90?, β = 115.37?, γ = 90?, and volume of the unit cell, V = 1609 ?3. The functional groups are confirmed by FTIR vibrational analysis. Optical transmission spectra revealed the optical properties of the grown crystal. Transmission spectrum reveals that the crystal has low UV cut-off of 205 nm and has a good transmittance in the entire visible region enabling its use in optical applications. There is no absorption in the entire visible region. Mechanical strength of the grown material is tested by hardness studies. The value of hardness increases when the applied load is increased.展开更多
Solubility studies of Diammonium Hydrogen Phosphate(DAHP) in de-ionized water were performed at various temperatures in the range 30-50 °C. Single crystals of DAHP were grown from aqueous solutions by slow evapor...Solubility studies of Diammonium Hydrogen Phosphate(DAHP) in de-ionized water were performed at various temperatures in the range 30-50 °C. Single crystals of DAHP were grown from aqueous solutions by slow evaporation technique. Structural characterization of the grown crystals has been carried out by powder and single crystal X-ray diffraction (XRD) methods. DAHP crystals crystallize in monoclinic structure with the space group P21/c. Second harmonic generation (SHG) for the material of this work was confirmed using Nd: YAG laser. The UV-Visible spectrum show that the grown crystals have wide optical transparency in the entire visible region. The dielectric measurements were made for grown DAHP crystal at the frequencies of 100 Hz and 1 KHz and in the temperature range 30-150 °C. Vickers microhardness value of DAHP crystal is found to increase with increase in load. Value of density of the grown DAHP crystal has been measured and it is well matched with the data of XRD studies.展开更多
Most irradiation studies in the hydrogen bonded ferroelectrics have been concentrated on the transient defects induced by ionising radiation, such as ultraviolet （UV） light, where the defects are closely related to ...Most irradiation studies in the hydrogen bonded ferroelectrics have been concentrated on the transient defects induced by ionising radiation, such as ultraviolet （UV） light, where the defects are closely related to the optical properties. But heavy ion beam irradiation effects have rarely been studied. The structural, optical, and non-linear optical properties of the doped crystals were analyzed with the characterization studies, such as powder XRD, UV-Visible and second harmonic generation （SHG） measurements, respectively. The results for doped KDP crystal were compared with the results of the pure KDP crystals. The experiment results showed that Li^3＋ irradiation leads to the development of a well-defined surface H peak in dye doped KDP crystals. The stability of KDP single crystal was improved by doping organic dyes. The nano-islands of dye in KDP were likely to be dissolved and enhance the non-linear optical properties of these materials.展开更多
The title compound, C16H20INo3, crystallizes in space group P1 (#2),triclinic, a=7. 970(1), b=9. 098(1), c= 12. 910(2) A, a=90. 00(1), β=81. 63(1), γ=65. 75(1)°, V=842. 6(2) A 3, Z=2, Dc= 1. 581 g/cm3,μ(MoKa) ...The title compound, C16H20INo3, crystallizes in space group P1 (#2),triclinic, a=7. 970(1), b=9. 098(1), c= 12. 910(2) A, a=90. 00(1), β=81. 63(1), γ=65. 75(1)°, V=842. 6(2) A 3, Z=2, Dc= 1. 581 g/cm3,μ(MoKa) = 1. 909mm-1, F(000) =400. The final R and (F2)R are 0. 0269 and0. 0632 for 2903 observed reflections (I>2σ(I) ), respectively. In the title molecule, two configurations,A and B were found for the slightly twisted cations, which take the same occupancy inthe crystal equally. Cations are connected through anions 1- and crystallized water,and anti-parallelly packed through intermolecular weak hydrogen bonding, van derWaals interactions and strong π-π interaction.展开更多
在 Li Nb O3 中掺进 3 mol%、5mol%、7mol% Zn O生长 Zn∶ L i Nb O3 晶体 .测试Zn∶ L i Nb O3 晶体的吸收光谱 ,研究 Zn∶ Li Nb O3 晶体吸收边紫移的机制 .测试 Zn∶ Li Nb O3晶体的红外光谱 ,研究 Zn( 7mol% )∶L i Nb O3 晶体 OH-...在 Li Nb O3 中掺进 3 mol%、5mol%、7mol% Zn O生长 Zn∶ L i Nb O3 晶体 .测试Zn∶ L i Nb O3 晶体的吸收光谱 ,研究 Zn∶ Li Nb O3 晶体吸收边紫移的机制 .测试 Zn∶ Li Nb O3晶体的红外光谱 ,研究 Zn( 7mol% )∶L i Nb O3 晶体 OH-吸收峰由 3 484cm- 1移到 3 53 0 cm- 1的机制 .测试 Zn∶ L i Nb O3 晶体倍频转换效率和相位匹配温度 ,研究 Zn∶ Li Nb O3展开更多
文摘[Zn(POM)_2Br_2](POM is 3-Methyl-4-Nitropyridine-1-Oxide),C_(12)H_(12)Br_2N_4O_6Zn, Mr=533.44,triclinic,P1,a=11.450(3),b=13.027(2),c=6.605(1),α=101.25(1),β=96.96(2), γ=108.06(2)°,V=901.2(4)~3,Z=2,D_c=1.97g·cm^(-3),(MoK_α)=0.71069,F(000)=520, μ=58.21cm^(-1),final R=0.040 for 2192 observed reflections,T=296K.The compound is a mononuclear complex,containing a tetrahedrally coordinated zinc atom.
文摘The SHG effects of substituted 3-thienyl chalcone compounds weremeasured. The relationship between structure and effect of substituted 3-thienyl chal-cone derivatives and substituted 2-thienyl chalcone derivatives were discussed. It isshown that their properties of high SHG efficient are similar to each other and the sub-stituted 3-thienyl chalcone molecules are easier to form non-centrosymmetric crystalstructure than substituted 2-thienyl chalcone molecules.
文摘A new organic single crystal of β-Alanine Oxalate (BAO) has been grown from solution by slow evaporation technique. Transparent, colourless crystals of size upto 11 × 9 × 4 mm3 were obtained. Formation of the new crystal has been confirmed by single crystal XRD and FTIR spectra. The grown crystals have been subjected to powder X-ray diffraction studies to identify the crystalline nature. Single crystal X-ray diffractometer was utilized to measure unit cell parameters and to confirm the crystal structure. BAO belongs to monoclinic system with lattice parameters a = 22.335 ?, b = 5.697 ?, c = 13.993 ?, α = 90?, β = 115.37?, γ = 90?, and volume of the unit cell, V = 1609 ?3. The functional groups are confirmed by FTIR vibrational analysis. Optical transmission spectra revealed the optical properties of the grown crystal. Transmission spectrum reveals that the crystal has low UV cut-off of 205 nm and has a good transmittance in the entire visible region enabling its use in optical applications. There is no absorption in the entire visible region. Mechanical strength of the grown material is tested by hardness studies. The value of hardness increases when the applied load is increased.
文摘Solubility studies of Diammonium Hydrogen Phosphate(DAHP) in de-ionized water were performed at various temperatures in the range 30-50 °C. Single crystals of DAHP were grown from aqueous solutions by slow evaporation technique. Structural characterization of the grown crystals has been carried out by powder and single crystal X-ray diffraction (XRD) methods. DAHP crystals crystallize in monoclinic structure with the space group P21/c. Second harmonic generation (SHG) for the material of this work was confirmed using Nd: YAG laser. The UV-Visible spectrum show that the grown crystals have wide optical transparency in the entire visible region. The dielectric measurements were made for grown DAHP crystal at the frequencies of 100 Hz and 1 KHz and in the temperature range 30-150 °C. Vickers microhardness value of DAHP crystal is found to increase with increase in load. Value of density of the grown DAHP crystal has been measured and it is well matched with the data of XRD studies.
文摘Most irradiation studies in the hydrogen bonded ferroelectrics have been concentrated on the transient defects induced by ionising radiation, such as ultraviolet （UV） light, where the defects are closely related to the optical properties. But heavy ion beam irradiation effects have rarely been studied. The structural, optical, and non-linear optical properties of the doped crystals were analyzed with the characterization studies, such as powder XRD, UV-Visible and second harmonic generation （SHG） measurements, respectively. The results for doped KDP crystal were compared with the results of the pure KDP crystals. The experiment results showed that Li^3＋ irradiation leads to the development of a well-defined surface H peak in dye doped KDP crystals. The stability of KDP single crystal was improved by doping organic dyes. The nano-islands of dye in KDP were likely to be dissolved and enhance the non-linear optical properties of these materials.
文摘The title compound, C16H20INo3, crystallizes in space group P1 (#2),triclinic, a=7. 970(1), b=9. 098(1), c= 12. 910(2) A, a=90. 00(1), β=81. 63(1), γ=65. 75(1)°, V=842. 6(2) A 3, Z=2, Dc= 1. 581 g/cm3,μ(MoKa) = 1. 909mm-1, F(000) =400. The final R and (F2)R are 0. 0269 and0. 0632 for 2903 observed reflections (I>2σ(I) ), respectively. In the title molecule, two configurations,A and B were found for the slightly twisted cations, which take the same occupancy inthe crystal equally. Cations are connected through anions 1- and crystallized water,and anti-parallelly packed through intermolecular weak hydrogen bonding, van derWaals interactions and strong π-π interaction.
文摘在 Li Nb O3 中掺进 3 mol%、5mol%、7mol% Zn O生长 Zn∶ L i Nb O3 晶体 .测试Zn∶ L i Nb O3 晶体的吸收光谱 ,研究 Zn∶ Li Nb O3 晶体吸收边紫移的机制 .测试 Zn∶ Li Nb O3晶体的红外光谱 ,研究 Zn( 7mol% )∶L i Nb O3 晶体 OH-吸收峰由 3 484cm- 1移到 3 53 0 cm- 1的机制 .测试 Zn∶ L i Nb O3 晶体倍频转换效率和相位匹配温度 ,研究 Zn∶ Li Nb O3
