The title complex （C50H44C14O8） was synthesized and structurally determined by single-crystal X-ray diffraction method. It crystallizes in monoclinic, space group P21/n with a = 19.7768（4）, b =10.2085（2）, c = 21...The title complex （C50H44C14O8） was synthesized and structurally determined by single-crystal X-ray diffraction method. It crystallizes in monoclinic, space group P21/n with a = 19.7768（4）, b =10.2085（2）, c = 21.2721（4）A,β= 97.153（1）°, V = 4261.23（14）A^3, Z = 4, Mr = 914.65, F（000） = 1904, Dc = 1.426 g/cm^3,μ = 0.336, the final R = 0.0550 and wR = 0.1647. The compound was structurally characterized by IR and ^1H NMR. The molecules are stacked through C-H...π interactions and intermolecular C-H...O hydrogen bonds.展开更多
A new glassy carbon electrode modified with novel caHx[4]arene derivative was prepared and then applied to the selective recognition of lead ion in aqueous media by cyclic and square wave voltammtry. A new anodic stri...A new glassy carbon electrode modified with novel caHx[4]arene derivative was prepared and then applied to the selective recognition of lead ion in aqueous media by cyclic and square wave voltammtry. A new anodic stripping peak at - 0.92 V (vs. Ag/Ag+) in square wave voltammogram can be obtained by scanning the potential from - 1.5 to - 0.6 V, of which the peak current is proportional to the concentration of Pb2+. The modified electrode in 0.1 moVL HNO3 solution showed a linear voltammetric response in the range of 2.0 x 10(-8)-1.0 x 10(-6) mol/L and a detection limit of 6.1 x 10(-9) mol/L. In the modified glassy carbon electrode no significant interference occurred from alkali, alkaline and transition metal ions except Hg2+, Ag+ and Cu2+ ions, which can be eliminated by the addition of KSCN. The proposed method was successfully applied to determine lead in aqueous samples.展开更多
The title compound （C50H.44010） was synthesized and structurally determined by single-crystal X-ray diffraction method. It crystallizes in monoclinic, space group P21/c with a = 16.713（4）, b --- 13.189（3）, c = 1...The title compound （C50H.44010） was synthesized and structurally determined by single-crystal X-ray diffraction method. It crystallizes in monoclinic, space group P21/c with a = 16.713（4）, b --- 13.189（3）, c = 19.434（5） A, β = 104.411（4）°, Mr = 804.85, Dc = 1.288 g/cm3, V = 4149.2（17） A3, Z = 4, F（000） = 1696, #（MoKa） = 0.089 mm-1T = 296（2） K, 7279 independent reflections with 3172 observed ones （I 〉 2δ（/））, R = 0.0520 and wR = 0.1203 with GOF = 0.928 （R = 0.1464 and wR = 0.1657 for all data）. The calixarene moiety maintains the symmetric cone conformation through intramolecular O-H…O hydrogen bonds. Preliminary bioassays indicated that the title compound has a potent inhibitory activity against the strand transfer process of HIV-1 integrase.展开更多
Glassy carbon electrode modified by 25,27-dihydroxy-26,28-di（2’-Methyl-6-hydroxypyrimidine）thiopentaoxylcalix[4] arene-PVC was made.The electrochemical character of the modified electrode was investigated by Cyclic...Glassy carbon electrode modified by 25,27-dihydroxy-26,28-di（2’-Methyl-6-hydroxypyrimidine）thiopentaoxylcalix[4] arene-PVC was made.The electrochemical character of the modified electrode was investigated by Cyclic Votalmmetry in HCl,HNO3 and H2SO4.Effects of concentration of HCl and scan rate were discussed.The modified Glassy carbon electrode was found to be excellent respondence to Cd2+in 1mol/L HCl.The experiment parameters such as accumulation potential and time and scan rate were determined on Cadmium.It was found that the linear equation is Ip（μA）=10.95+2.430 lgc（mol/L）（r=0.9968）.The concentration is in the range from 5.0×10-3to 8.0×10-7mol/L and the detect limit is 8.0×10-7mol/L.The method has been applied to the analysis of synthetic sample.The recovery of Cd2+is 98%.展开更多
The target compound （C58H74N6010） has been structurally determined by single- crystal X-ray diffraction. The crystal is in the monoclinic system, space group C2/c, with a = 22.08（3）, b = 12.628（19）, c- 21.73（3...The target compound （C58H74N6010） has been structurally determined by single- crystal X-ray diffraction. The crystal is in the monoclinic system, space group C2/c, with a = 22.08（3）, b = 12.628（19）, c- 21.73（3）A, β= 106.78（3）°, C58H74N6010, Mr= 1015.23, Dc = 1.16239 g/cm^3, V = 5801（14） A3, Z = 4, F（000） = 2176, μ（MoKa） = 0.080 mm^-1, T = 293（2） K, 5107 independent reflections with 3125 observed ones （1〉 20（I））, R = 0.0768 and wR = 0.2305 with GOF = 1.025 （R = 0.1129 and wR = 0.2674 for all data）. The calixarene moiety maintains the symmetric cone conformation through intramolecular O-H…O and N-H…O hydrogen bonds. The thermal analysis showed that the decomposition mechanism of compound 3 is complex. Fluorescence spectra of 3 exhibited an emission band at 423 nm when excited with 360 nm radiation at room temperature in DMF.展开更多
基金the Scientific Research Fund Projects of China West Normal University(No.06B003)the Youth Fund Projects of Sichuan Educational Department(No.2006B039)
文摘The title complex （C50H44C14O8） was synthesized and structurally determined by single-crystal X-ray diffraction method. It crystallizes in monoclinic, space group P21/n with a = 19.7768（4）, b =10.2085（2）, c = 21.2721（4）A,β= 97.153（1）°, V = 4261.23（14）A^3, Z = 4, Mr = 914.65, F（000） = 1904, Dc = 1.426 g/cm^3,μ = 0.336, the final R = 0.0550 and wR = 0.1647. The compound was structurally characterized by IR and ^1H NMR. The molecules are stacked through C-H...π interactions and intermolecular C-H...O hydrogen bonds.
文摘A new glassy carbon electrode modified with novel caHx[4]arene derivative was prepared and then applied to the selective recognition of lead ion in aqueous media by cyclic and square wave voltammtry. A new anodic stripping peak at - 0.92 V (vs. Ag/Ag+) in square wave voltammogram can be obtained by scanning the potential from - 1.5 to - 0.6 V, of which the peak current is proportional to the concentration of Pb2+. The modified electrode in 0.1 moVL HNO3 solution showed a linear voltammetric response in the range of 2.0 x 10(-8)-1.0 x 10(-6) mol/L and a detection limit of 6.1 x 10(-9) mol/L. In the modified glassy carbon electrode no significant interference occurred from alkali, alkaline and transition metal ions except Hg2+, Ag+ and Cu2+ ions, which can be eliminated by the addition of KSCN. The proposed method was successfully applied to determine lead in aqueous samples.
基金supported by the National Natural Science Foundation of China(No.21102003)National Students'Innovation and Entrepreneurship Training Program(No.201210361094)Scientific Research Foundation for the Introduction of Talent and Young Teachers Scientific Research Foundation of Anhui University of Science&Technology(11214,2012QNY27)
文摘The title compound （C50H.44010） was synthesized and structurally determined by single-crystal X-ray diffraction method. It crystallizes in monoclinic, space group P21/c with a = 16.713（4）, b --- 13.189（3）, c = 19.434（5） A, β = 104.411（4）°, Mr = 804.85, Dc = 1.288 g/cm3, V = 4149.2（17） A3, Z = 4, F（000） = 1696, #（MoKa） = 0.089 mm-1T = 296（2） K, 7279 independent reflections with 3172 observed ones （I 〉 2δ（/））, R = 0.0520 and wR = 0.1203 with GOF = 0.928 （R = 0.1464 and wR = 0.1657 for all data）. The calixarene moiety maintains the symmetric cone conformation through intramolecular O-H…O hydrogen bonds. Preliminary bioassays indicated that the title compound has a potent inhibitory activity against the strand transfer process of HIV-1 integrase.
文摘Glassy carbon electrode modified by 25,27-dihydroxy-26,28-di（2’-Methyl-6-hydroxypyrimidine）thiopentaoxylcalix[4] arene-PVC was made.The electrochemical character of the modified electrode was investigated by Cyclic Votalmmetry in HCl,HNO3 and H2SO4.Effects of concentration of HCl and scan rate were discussed.The modified Glassy carbon electrode was found to be excellent respondence to Cd2+in 1mol/L HCl.The experiment parameters such as accumulation potential and time and scan rate were determined on Cadmium.It was found that the linear equation is Ip（μA）=10.95+2.430 lgc（mol/L）（r=0.9968）.The concentration is in the range from 5.0×10-3to 8.0×10-7mol/L and the detect limit is 8.0×10-7mol/L.The method has been applied to the analysis of synthetic sample.The recovery of Cd2+is 98%.
基金supported by the National Natural Science Foundation of China(No.21102003)Scientific Research Foundation for the Introduction of Talent of Anhui University of Science & Technology
文摘The target compound （C58H74N6010） has been structurally determined by single- crystal X-ray diffraction. The crystal is in the monoclinic system, space group C2/c, with a = 22.08（3）, b = 12.628（19）, c- 21.73（3）A, β= 106.78（3）°, C58H74N6010, Mr= 1015.23, Dc = 1.16239 g/cm^3, V = 5801（14） A3, Z = 4, F（000） = 2176, μ（MoKa） = 0.080 mm^-1, T = 293（2） K, 5107 independent reflections with 3125 observed ones （1〉 20（I））, R = 0.0768 and wR = 0.2305 with GOF = 1.025 （R = 0.1129 and wR = 0.2674 for all data）. The calixarene moiety maintains the symmetric cone conformation through intramolecular O-H…O and N-H…O hydrogen bonds. The thermal analysis showed that the decomposition mechanism of compound 3 is complex. Fluorescence spectra of 3 exhibited an emission band at 423 nm when excited with 360 nm radiation at room temperature in DMF.
基金supported by the National Science Foundation of China(Project 29975014)the Science Foundation of the Education Department of Hubei Province(Project 2002z0004)
