A gold electrode covered with selfassembled monolayers of 2mercaptobenzothiazole(Au/MBT)has been developed and its electrochemical characteristics have been investigated in detail.Using hexacyanoferrate as the electro...A gold electrode covered with selfassembled monolayers of 2mercaptobenzothiazole(Au/MBT)has been developed and its electrochemical characteristics have been investigated in detail.Using hexacyanoferrate as the electrochemical probe for studying the characteristics of the MBT monolayer film,the results,obtained by A.C.impedance spectroscopy technique,show that the electron transfer of hexacyanoferrate()on Au|MBT in higher pH media was more difficult than that obtained in H2SO4 medium or on a bare gold electrode.The electrochemical reversibility of Fe(CN)3-6/Fe(CN)4-6 changed with pH of the solution due to the proton and deproton states of N atom of MBT.The relationship between the coverage of MBT on Au surface or pH and the apparent heterogeneous rate constant was derived and discussed.The double layer capacitance of Au|MBT is(76455)F/cm2.The characteristic frequency was dependent on the pH of the solution.展开更多
Cyclic voltammetry is used to study the electrochemical behavior of CoCl 2, Co(dppe) 2Cl 2 and Co(mbt S,N) 2(dppe) [Hmbt=2 mercaptobenzothiazole; dppe=1,2 (diphenylphosphino)] in DMF or MeCN solution with 0...Cyclic voltammetry is used to study the electrochemical behavior of CoCl 2, Co(dppe) 2Cl 2 and Co(mbt S,N) 2(dppe) [Hmbt=2 mercaptobenzothiazole; dppe=1,2 (diphenylphosphino)] in DMF or MeCN solution with 0.1 mol·L -1 Bu n 4NBF 4 as electrolyte on the Pt electrode. The results indicate that the reduction potential, transfer coefficient and diffusion coefficient of Co(Ⅱ), Co(dppe)(Ⅱ) and Co(mbt S,N) 2(dppe) in DMF and MeCN depend on the solvent coordinated species, the volume and structure of ion. This is the characterization of the synergistic coordination effect.展开更多
Normal Haman Spectra(NRS) of solid PMT (1-phenyl-5-mercaptotetrazole) and MBT (2-mercaptobenzothiazole) and their surface enhanced Raman spectra (SERS) adsorbed on the surface of the silver subcolloidal particles are ...Normal Haman Spectra(NRS) of solid PMT (1-phenyl-5-mercaptotetrazole) and MBT (2-mercaptobenzothiazole) and their surface enhanced Raman spectra (SERS) adsorbed on the surface of the silver subcolloidal particles are reported and compared. It is supposed that PMT adsorbed on silver with both N and S atoms whereas MBT may be adsorbed on silver through S atom.展开更多
Four complexes containing the [Re(V)O]3+ core have been prepared by substitution on the precursors RO(citrate)2- and ReO(gluconate)2-. The complex [ReO(MBT)2OH] was obtained by reaction of the direct reduction of ReO4...Four complexes containing the [Re(V)O]3+ core have been prepared by substitution on the precursors RO(citrate)2- and ReO(gluconate)2-. The complex [ReO(MBT)2OH] was obtained by reaction of the direct reduction of ReO4- using sodium borohydride as a reducing agent. Four complexes were character-ized by UV-Vis and IR spectrophotometer, elemental analyses, 1H-and 13C NMR spectroscopy, TG and DFT calculations.展开更多
文摘A gold electrode covered with selfassembled monolayers of 2mercaptobenzothiazole(Au/MBT)has been developed and its electrochemical characteristics have been investigated in detail.Using hexacyanoferrate as the electrochemical probe for studying the characteristics of the MBT monolayer film,the results,obtained by A.C.impedance spectroscopy technique,show that the electron transfer of hexacyanoferrate()on Au|MBT in higher pH media was more difficult than that obtained in H2SO4 medium or on a bare gold electrode.The electrochemical reversibility of Fe(CN)3-6/Fe(CN)4-6 changed with pH of the solution due to the proton and deproton states of N atom of MBT.The relationship between the coverage of MBT on Au surface or pH and the apparent heterogeneous rate constant was derived and discussed.The double layer capacitance of Au|MBT is(76455)F/cm2.The characteristic frequency was dependent on the pH of the solution.
文摘Cyclic voltammetry is used to study the electrochemical behavior of CoCl 2, Co(dppe) 2Cl 2 and Co(mbt S,N) 2(dppe) [Hmbt=2 mercaptobenzothiazole; dppe=1,2 (diphenylphosphino)] in DMF or MeCN solution with 0.1 mol·L -1 Bu n 4NBF 4 as electrolyte on the Pt electrode. The results indicate that the reduction potential, transfer coefficient and diffusion coefficient of Co(Ⅱ), Co(dppe)(Ⅱ) and Co(mbt S,N) 2(dppe) in DMF and MeCN depend on the solvent coordinated species, the volume and structure of ion. This is the characterization of the synergistic coordination effect.
文摘Normal Haman Spectra(NRS) of solid PMT (1-phenyl-5-mercaptotetrazole) and MBT (2-mercaptobenzothiazole) and their surface enhanced Raman spectra (SERS) adsorbed on the surface of the silver subcolloidal particles are reported and compared. It is supposed that PMT adsorbed on silver with both N and S atoms whereas MBT may be adsorbed on silver through S atom.
文摘Four complexes containing the [Re(V)O]3+ core have been prepared by substitution on the precursors RO(citrate)2- and ReO(gluconate)2-. The complex [ReO(MBT)2OH] was obtained by reaction of the direct reduction of ReO4- using sodium borohydride as a reducing agent. Four complexes were character-ized by UV-Vis and IR spectrophotometer, elemental analyses, 1H-and 13C NMR spectroscopy, TG and DFT calculations.
