金表面有机膦酸锆多层膜在不同支持电解质溶液中的稳定性(英文)

Stability of Zirconium Alkylbisphosphonate Multilayers on Gold Surfaces in Various Supporting Electrolyte Solutions

Zirconium 1,4-butylenediphosphonate[Zr(BDPA)] multilayers on a 3-mercaptopropylphosphonate-coated gold electrode were prepared by the conventional layer-by-layer method.The stability of the Zr(BDPA) multilayers in different supporting electrolyte solutions was studied by cyclic voltammetry (CV) and X-ray photoelectron spec-troscopy(XPS) measurements.The results show that the Zr(BDPA) multilayers are very stable in 0.2 mol·L-1 KCl,0.2 mol·L-1 KNO3 and low concentration phosphate buffer solution(PBS) with low pH values(c≤0.05 mol·L-1,pH≤ 6.8).While in high concentration 0.2 mol·L-1 PBS(pH=5.2～7.4),the Zr(BDPA) multilayers will be partially desorbed within two days,possibly due to the formation of more stable zirconium phosphate.

Zirconium 1,4-butylenediphosphonate[Zr（BDPA）] muhilayers on a 3-mercaptopropylphosphonate-coated gold electrode were prepared by the conventional layer-by-layer method. The stability of the Zr（BDPA） muhilayers in different supporting electrolyte solutions was studied by cyclic vohammetry （CV） and X-ray photoelectron spectroscopy（XPS） measurements. The results show that the Zr（BDPA） muhilayers are very stable in 0.2 mol·L^-1 KCl, 0.2 mol·L^-1 KNO3 and low concentration phosphate buffer solution（PBS） with low pH values（c ≤ 0.05 mol·L^-1, pH ≤ 6.8）. While in high concentration 0.2 mol·L^-1 PBS（pH=5.2-7.4）, the Zr（BDPA） multilayers will be partially desorbed within two days, possibly due to the formation of more stable zirconium phosphate.