化学镀镍体系次亚磷酸钠氧化中间产物的ESR研究  

An ESR Investigation of the Intermediate Obtained from Oxidation of Sodium Hypophosphite in the Process of Electroless Nickel Deposition

作　　者：旷亚非[1] 王美媛[1] 李国希[1] 黄树坤[1] 

机构地区：[1]湖南大学化学化工学院,长沙410082

出　　处：《高等学校化学学报》2000年第1期124-126,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金! (批准号 :2 97730 12 )资助

摘　　要：The radical intermediate, which is produced in the process of electroless nickel plating, was detected in the presence of water-soluble trap α-4-pyridy1-N-tert-buty1 nitrone（POBN） or α-phenyl-tert-buty1 nitrone（PBN） by electron spin resonance（ESR） spectroscopy. The results obtained indicated that a 16-line（g=2.006 1, aβ<sub>C—H=1.98×10-4 T, aγ<sub>P—H=3.32×10-4 T, aN=aP=15.93×10-4 T） or a 18-line （g=2.004 9, aβ<sub>C—H=aγ<sub>P—H=2.38×10-4 T, aP=17.72×10-4 T, aN=16.20×10-4 T） ESR spectrum was observed in the process of electroless nickel plating when spin trap PBN or POBN was added. The spectra-line patterns and hyperfine coupling parameters were greatly indentical with those in the solution composed of Ti3+（0.01 mol/L）+H2O2（0.05 mol/L）+H2PO-2（0.01 mol/L）+POBN or PBN（0.01 mol/L）. Therefore, the spin adducts formed in the process of electroless nickel plating could be ascribed to the adducts belonging to HPO-·2 and POBN or PBN and it follows that the anion radical HPO-·2 was really produced from the oxidation of sodium hypophosphite in the process of electroless nickel plating.The radical intermediate, which is produced in the process of electroless nickel plating, was detected in the presence of water-soluble trap α-4-pyridy1-N-tert-buty1 nitrone(POBN) or α-phenyl-tert-buty1 nitrone(PBN) by electron spin resonance(ESR) spectroscopy. The results obtained indicated that a 16-line(g=2.006 1, aβ__C—H=1.98×10-4 T, aγ__P—H=3.32×10-4 T, a_N=a_P=15.93×10-4 T) or a 18-line (g=2.004 9, aβ__C—H=aγ__P—H=2.38×10-4 T, a_P=17.72×10-4 T, a_N=16.20×10-4 T) ESR spectrum was observed in the process of electroless nickel plating when spin trap PBN or POBN was added. The spectra-line patterns and hyperfine coupling parameters were greatly indentical with those in the solution composed of Ti3+(0.01 mol/L)+H_2O_2(0.05 mol/L)+H_2PO-_2(0.01 mol/L)+POBN or PBN(0.01 mol/L). Therefore, the spin adducts formed in the process of electroless nickel plating could be ascribed to the adducts belonging to HPO-·_2 and POBN or PBN and it follows that the anion radical HPO-·_2 was really produced from the oxidation of sodium hypophosphite in the process of electroless nickel plating.

关 键 词：化学镀 镍 ESR 自旋捕集技术 磷酸二氢钠 

分 类 号：TQ153.12[化学工程—电化学工业]