The fluorescence spectra and binding reaction of neutral red with nucleic acids have been studied. At pH=4.5, a new method for the determination of trace nucleic acids based on fluorescence quenching measurement was e...The fluorescence spectra and binding reaction of neutral red with nucleic acids have been studied. At pH=4.5, a new method for the determination of trace nucleic acids based on fluorescence quenching measurement was established. When 8.0×10 -6 mol/L NR is employed, the linear ranges of the calibration graphs are 0.08-2.0 μg/mL for calf thymus DNA(ctDNA), 0.12-2.2 μg/mL for fish sperm DNA(fsDNA) and 0.30-1.4 μg/mL for yeast RNA(yRNA), respectively. The corresponding detection limits are 30, 33 and 66 ng/mL, respectively. The real samples were analyzed satisfactorily.展开更多
The complex, {[La2(β ala)6(H2O)4](ClO4)6·H2O}n, was synthesized in aqueous solution and its crystal structure was determined by X ray diffraction method .The crystal is triclinic with space group of <IMG SRC=...The complex, {[La2(β ala)6(H2O)4](ClO4)6·H2O}n, was synthesized in aqueous solution and its crystal structure was determined by X ray diffraction method .The crystal is triclinic with space group of <IMG SRC="IMAGE/04260088.JPG"HEIGHT=11 WIDTH=12>.The cell parameters are a=0.946(1)nm, b=1.2917(1)nm, c=2.1726(3)nm,α=76.79(1)°, β=80.85(1)°,γ=83.35(1)°, V=2.5429(5)nm3, Z=2, Dc=1.958g·cm-3.The complex is an one dimensional infinite chain. The coordination number of lanthanum ion is nine, forming a distorted tricapped trigonal prism.展开更多
The Lanthanum picrate complex with 1,10 phenanthroline was synthesized, whose chemical formula can be written in [La(pic)3(phen)2]·CH3CN. The crystal X ray diffraction analysis shows that crystal belongs to monoc...The Lanthanum picrate complex with 1,10 phenanthroline was synthesized, whose chemical formula can be written in [La(pic)3(phen)2]·CH3CN. The crystal X ray diffraction analysis shows that crystal belongs to monoclinic with space group P21/a and unit cell parameters:a=17.072(4),b=16.083(4),c=17.789(4),β=106.34(2)°,V=4687(4)3, Z=4,Dc=1.735g·cm3, μ=10.106cm 1,F(000)=2448,R=0.0589,Rw=0.0589. The coordination number of La3+is nine. Acetonitrile, a solvent molecule is not coordinated. Between three Pic ligands, that possesses 2 bidentate forms six member ring with La. The other is unidentate ligand. As usually, phen is bidentate ligand.展开更多
The new complex formulated ·(HOx)2·6H2O(HDPC- is pyridine 2,6 dicarb oxylate,Hoxis 8 Hydroxyquindine) has been synthesized and the crystal structure was determined by X ray diffraction .The crystal structure...The new complex formulated ·(HOx)2·6H2O(HDPC- is pyridine 2,6 dicarb oxylate,Hoxis 8 Hydroxyquindine) has been synthesized and the crystal structure was determined by X ray diffraction .The crystal structure of the complex belongs to monoclinic system with space group C2/c. a=18.423(3)?, b=10.384(2) ?,c=19.139(2)?, α=γ=90°, β=111.050(10)°, V=3417.0(9)?3, Z=4, Dc=1.544Mg·m-3, μ=0.722mm-1. In the crystal Cu? ion is six coordinated to form a distorted octahedron.展开更多
文摘The fluorescence spectra and binding reaction of neutral red with nucleic acids have been studied. At pH=4.5, a new method for the determination of trace nucleic acids based on fluorescence quenching measurement was established. When 8.0×10 -6 mol/L NR is employed, the linear ranges of the calibration graphs are 0.08-2.0 μg/mL for calf thymus DNA(ctDNA), 0.12-2.2 μg/mL for fish sperm DNA(fsDNA) and 0.30-1.4 μg/mL for yeast RNA(yRNA), respectively. The corresponding detection limits are 30, 33 and 66 ng/mL, respectively. The real samples were analyzed satisfactorily.
文摘The complex, {[La2(β ala)6(H2O)4](ClO4)6·H2O}n, was synthesized in aqueous solution and its crystal structure was determined by X ray diffraction method .The crystal is triclinic with space group of <IMG SRC="IMAGE/04260088.JPG"HEIGHT=11 WIDTH=12>.The cell parameters are a=0.946(1)nm, b=1.2917(1)nm, c=2.1726(3)nm,α=76.79(1)°, β=80.85(1)°,γ=83.35(1)°, V=2.5429(5)nm3, Z=2, Dc=1.958g·cm-3.The complex is an one dimensional infinite chain. The coordination number of lanthanum ion is nine, forming a distorted tricapped trigonal prism.
文摘The Lanthanum picrate complex with 1,10 phenanthroline was synthesized, whose chemical formula can be written in [La(pic)3(phen)2]·CH3CN. The crystal X ray diffraction analysis shows that crystal belongs to monoclinic with space group P21/a and unit cell parameters:a=17.072(4),b=16.083(4),c=17.789(4),β=106.34(2)°,V=4687(4)3, Z=4,Dc=1.735g·cm3, μ=10.106cm 1,F(000)=2448,R=0.0589,Rw=0.0589. The coordination number of La3+is nine. Acetonitrile, a solvent molecule is not coordinated. Between three Pic ligands, that possesses 2 bidentate forms six member ring with La. The other is unidentate ligand. As usually, phen is bidentate ligand.
文摘The new complex formulated ·(HOx)2·6H2O(HDPC- is pyridine 2,6 dicarb oxylate,Hoxis 8 Hydroxyquindine) has been synthesized and the crystal structure was determined by X ray diffraction .The crystal structure of the complex belongs to monoclinic system with space group C2/c. a=18.423(3)?, b=10.384(2) ?,c=19.139(2)?, α=γ=90°, β=111.050(10)°, V=3417.0(9)?3, Z=4, Dc=1.544Mg·m-3, μ=0.722mm-1. In the crystal Cu? ion is six coordinated to form a distorted octahedron.
