22758-12-9Relevant academic research and scientific papers
Organic “receptor” fully covered few-layer organic-metal chalcogenides for high-performance chemiresistive gas sensing at room temperature
Cao, Linan,Deng, Weihua,Jiang, Huijie,Jiang, Xiaoming,Li, Wenhua,Li, Yanzhou,Wang, Guane,Xu, Gang,Ye, Xiaoliang
, p. 5366 - 5369 (2020)
Organic-metal chalcogenides (OMCs) are proposed as a new family of two-dimensional (2D) chemiresistive sensing materials. Few-layer Ag(SPh-NH2), one of the OMCs, fully and orderly covered with predesigned -NH2groups as “receptors”, s
Axial and Azimuthal Angle Determination with Surface-Enhanced Raman Spectroscopy: Thiophenol on Copper, Silver, and Gold Metal Surfaces
Carron, Keith T.,Hurley, L. Gayle
, p. 9979 - 9984 (2007/10/02)
Raman spectra of noble-metal phenylthiolates and the corresponding surface-enhanced Raman (SER) spectra of the surface species on copper, silver, and gold are reported.Periodic trends were found in both the bulk Raman spectra of the phenylthiolates and the SER spectra.Intensities of the Raman spectra approach that of liquid thiophenol as the metal changes from copper to silver to gold.The SER spectra were used to obtain orientations of the thiophenol species at the noble-metal surfaces.Orientations were determined through the electric field enhancement of vibrations normal to the metal surface.The model developed in this paper allows one to determine both the azimuthal and axial angles of C2ν molecules at surfaces.This is possible by performing the SERS measurement in media of differing indexes of refraction.For silver and gold we found the axial angle Θ = 85 and 76 deg, respectively.The azimuthal angle Φ was found to vary from 32 to 0 deg from silver to gold.The SER spectra of copper were too weak for accurate angle determinations with a surrounding media other than air.However, the SER spectrum observed on copper in air does indicate a near-perpendicular orientation.
Layered structure of crystalline compounds AgSR
Dance, Ian G.,Fisher, Keith J.,Herath Banda,Scudder, Marcia L.
, p. 183 - 187 (2008/10/08)
The insoluble silver thiolate compounds AgS(CH2)2CH3 (1), AgS(CH2)3CH3 (2), AgS(CH2)5CH3 (3), AgS(CH2)7CH3 (4), AgSC6H5 (5), AgSC6H4-4-F (6), AgSC6H4-4-Cl (7), AgSC6H4-4-Br (8), AgSC6H4-4-CH3 (9) and AgSC6H4-4-OCH3 (10) have not yielded crystals suitable for full diffraction analysis, but do reveal the essential features of their two-dimensionally nonmolecular structure in their powder diffraction patterns. For each compound, a strongly developed progression of axial reflections {0k0} shows that there are ∞2{AgSR} layers in which substituents extend perpendicular to both sides of a central slab of Ag and S atoms. These data, together with the nonaxial reflections, allow assignment of an approximate monoclinic unit cell as a ≈ 8.7 ?, b in proportion to the length of the substituent, c ≈ 4.35 ?, and β ≈ 120°. The thickness of the central Ag,S slab and the small degree of interpenetration of substituents at the interface between layers can be estimated. More sterically demanding substituents R do not permit this layer structure. All attempts to form intercalation compounds, with guests between the distal atoms of the substituents on adjacent layers, were unsuccessful.
The direct electrochemical synthesis of thiolato complexes of copper, silver, and gold; the molecular structure of 2*CH3CN
Chadha, Raj K.,Kumar, Rajesh,Tuck, Dennis G.
, p. 1336 - 1342 (2007/10/02)
The electrochemical oxidation of anodic copper or silver (= M) into non-aqueous solutions of RSH (R = alkyl, axyl) gives MISR as insoluble materials in high yield.In the presence of 1,10-phenanthroline (= L), the products are MISR*phen for M = Cu, but not Ag.Gold resists oxidation under such conditions, and AuISR (R = n-C4H9, C6H5) was obtained in only poor yield.The crystal structure of the solvated dimeric adduct 2*CH3CN is triclinic, with a = 10.682(3) Angstroem, b = 11.729(4) Angstroem, c = 15.608(5) Angstroem, α = 76.87(2) deg, β = 76.35(2) deg, γ = 68.07(2) deg, V = 1742(1) Angstroem3, Z = 2 and space group P1.The structure is based on a folded Cu2S2 ring with an unusually short Cu-Cu distance of 2.613(3) Angstroem.Each copper atom has CuS2N2 pseudo-tetrahedral stereochemistry, with Cu-S = 2.337 Angstroem (av) and Cu-N = 2.10 Angstroem (av).
Crystallization and structure of bis(tetramethylammonium) octakis(benzenethiolato)hexaargentate(I), extending the series of cages [M4(SPh)6]2-, [M5(SPh)7]2-, [M6(SPh)8
Dance, Ian G.
, p. 1487 - 1492 (2008/10/08)
Nonaqueous solutions containing Ag+, PhS-, and Me4N+ crystallize pale yellow (Me4N)2[Ag6(SPh)8], as well as yellow (Me4N)2[Ag5(SPh)su
