AgC9H6NO4S, Mr = 332. 1, monoclinic, space group P21/c, a = 8. 292(1), b = 10. 394(2), c=10. 852(2)A, β=102. 73(1)°, V =912. 4(?)3, Z = 4, Dc = 2. 417gcm-3, λ(MoKα) = 0. 71073(?) , μ = 24. 0cm-1, F (000) = 64...AgC9H6NO4S, Mr = 332. 1, monoclinic, space group P21/c, a = 8. 292(1), b = 10. 394(2), c=10. 852(2)A, β=102. 73(1)°, V =912. 4(?)3, Z = 4, Dc = 2. 417gcm-3, λ(MoKα) = 0. 71073(?) , μ = 24. 0cm-1, F (000) = 648, final R =0. 041, Rw = 0. 047 for 1369 observed reflections. The coordination polyhedron of Ag(I) is penta-coordinated square pyramid.展开更多
Silver nanoparticles （AgNPs） were synthesised using equimolar concentrations of redtlcing agent vitamin C and AgCl precursor by simple precipitation method. The synthesised AgNPs were characterised by X-ray diffract...Silver nanoparticles （AgNPs） were synthesised using equimolar concentrations of redtlcing agent vitamin C and AgCl precursor by simple precipitation method. The synthesised AgNPs were characterised by X-ray diffraction （XRD）, UV-Visible, photoluminescence and field emission scanning electron microscopy （FESEM） analysis. The formation of AgNPs was confirmed by the typical surface plasmon resonance band at 426 nm. The presence of elemental silver and pure crystalline face centre cubic （fcc） structure was confirmed by energy dispersive X-ray analysis and XRD analysis, respectively. The FESEM images showed the formation of spherical AgNPs for lower concentrations （0.1 and 0.3 mol/L） while spike and flower shaped particles were formed for higher concentration. Photoluminescence characteristic band was observed with no shift at 390 nm indicating the stable nature of AgNPs. The antibacterial property of the AgNPs was tested against gram negative bacteria Pseudomonas aeruginosa by using Cissus quadrangular as a control and the result showed that vitamin C reduced AgNPs have good antibacterial activity.展开更多
By bridging 1,3：4,6-bis（3,6-dihydroxy-1,2-xylylene）tetrahydro-3a,6a-diphenyl imidazo- [4,5]-imidazole-2,5（IH,3H）-dione I with S（CH2CH2OCOCHECl）2, thiacrown molecular basket 2c was prepared for the first time. I...By bridging 1,3：4,6-bis（3,6-dihydroxy-1,2-xylylene）tetrahydro-3a,6a-diphenyl imidazo- [4,5]-imidazole-2,5（IH,3H）-dione I with S（CH2CH2OCOCHECl）2, thiacrown molecular basket 2c was prepared for the first time. It was found that the compound exhibited very poor affinity towards alkali metal ions but high extracting selectivity towards silver ion.展开更多
The binuclear complex [Ag2(m-Ph2PNHPPh2)3](ClO4)2CH2Cl2CH3OH (Ph2PNHP- Ph2 = bis(diphenylphosphino)amine) was prepared from the reaction of AgClO4 with bis- (diphenylphosphino)amine in equimolar ratio through self-ass...The binuclear complex [Ag2(m-Ph2PNHPPh2)3](ClO4)2CH2Cl2CH3OH (Ph2PNHP- Ph2 = bis(diphenylphosphino)amine) was prepared from the reaction of AgClO4 with bis- (diphenylphosphino)amine in equimolar ratio through self-assembly. The coordination cation affords a triply-bridging [Ag2L3]-type coordination moiety. The silver atom is in a trigonal planar environment with P3 coordination chromophore. The complex (C74H69Cl4N3O9P6Ag2) crystallizes in monoclinic, space group Cc with a = 18.3738(1), b = 20.0207(4), c = 20.5422(4) ? b = 95.829(1), V = 7517.5(2) 3, Z = 4, Mr = 1687.68, Dc = 1.491 g/cm3, F(000) = 3432, m = 0.848 mm-1, the final R = 0.0460 and wR = 0.0935 for 7005 observed reflections with I > 2s(I).展开更多
基金Supported by National Natural science Foundation of China
文摘AgC9H6NO4S, Mr = 332. 1, monoclinic, space group P21/c, a = 8. 292(1), b = 10. 394(2), c=10. 852(2)A, β=102. 73(1)°, V =912. 4(?)3, Z = 4, Dc = 2. 417gcm-3, λ(MoKα) = 0. 71073(?) , μ = 24. 0cm-1, F (000) = 648, final R =0. 041, Rw = 0. 047 for 1369 observed reflections. The coordination polyhedron of Ag(I) is penta-coordinated square pyramid.
基金DST-FIST and UGC-SAP,New Delhi for providing financial support to the Department of Physics,Manonmaniam Sundaranar UniversityNational Centre for Nanosciences and Nanotechnology(NCNSNT)University of Madras for providing FESEM and EDAX facilities
文摘Silver nanoparticles （AgNPs） were synthesised using equimolar concentrations of redtlcing agent vitamin C and AgCl precursor by simple precipitation method. The synthesised AgNPs were characterised by X-ray diffraction （XRD）, UV-Visible, photoluminescence and field emission scanning electron microscopy （FESEM） analysis. The formation of AgNPs was confirmed by the typical surface plasmon resonance band at 426 nm. The presence of elemental silver and pure crystalline face centre cubic （fcc） structure was confirmed by energy dispersive X-ray analysis and XRD analysis, respectively. The FESEM images showed the formation of spherical AgNPs for lower concentrations （0.1 and 0.3 mol/L） while spike and flower shaped particles were formed for higher concentration. Photoluminescence characteristic band was observed with no shift at 390 nm indicating the stable nature of AgNPs. The antibacterial property of the AgNPs was tested against gram negative bacteria Pseudomonas aeruginosa by using Cissus quadrangular as a control and the result showed that vitamin C reduced AgNPs have good antibacterial activity.
文摘By bridging 1,3：4,6-bis（3,6-dihydroxy-1,2-xylylene）tetrahydro-3a,6a-diphenyl imidazo- [4,5]-imidazole-2,5（IH,3H）-dione I with S（CH2CH2OCOCHECl）2, thiacrown molecular basket 2c was prepared for the first time. It was found that the compound exhibited very poor affinity towards alkali metal ions but high extracting selectivity towards silver ion.
基金This work was supported by NNSFC (No. 20171044) and the project for "undred Talents from" the Chinese Academy of Sciences
文摘The binuclear complex [Ag2(m-Ph2PNHPPh2)3](ClO4)2CH2Cl2CH3OH (Ph2PNHP- Ph2 = bis(diphenylphosphino)amine) was prepared from the reaction of AgClO4 with bis- (diphenylphosphino)amine in equimolar ratio through self-assembly. The coordination cation affords a triply-bridging [Ag2L3]-type coordination moiety. The silver atom is in a trigonal planar environment with P3 coordination chromophore. The complex (C74H69Cl4N3O9P6Ag2) crystallizes in monoclinic, space group Cc with a = 18.3738(1), b = 20.0207(4), c = 20.5422(4) ? b = 95.829(1), V = 7517.5(2) 3, Z = 4, Mr = 1687.68, Dc = 1.491 g/cm3, F(000) = 3432, m = 0.848 mm-1, the final R = 0.0460 and wR = 0.0935 for 7005 observed reflections with I > 2s(I).
