摘要
研究pH值不同时 ,异烟酸在两种不同电性纳米银上的SERS谱 ,发现随pH值的增加 ,在正电性纳米银上SERS增强 ,而在负电性纳米银上SERS减弱直至消失。两种纳米银上SERS谱明显不同。pH值较高时 ,在正电性纳米银上 ,异烟酸以异烟酸根离子的—C0 0 - 端垂直吸附在纳米银上。pH值较低时 ,在负电性纳米银上 。
At various pH values and positive and negative Nano-silver, the research into the heteronicotinic acid SERS shows that at the positive Nano-silver, SERS is getting stronger and stronger with the increase of pH value, and that at negative Nano-silver it is becoming weaker and weaker with the decrease of pH value.At high pH value and positive Nano-silver, heteronicotinic acid is at right angles absorpted with COO - on Nano-silver.At low pH value and negative Nano-silver, heteronicotinic acid is at an inclination absorpted with N:H of pyrimidine ring on Nano-silver.
出处
《楚雄师范学院学报》
2002年第6期33-35,共3页
Journal of Chuxiong Normal University
关键词
异烟酸
PH值
正、负电极胶态纳米银
吸附
SERS
heteronicotinic acid, pH value, positive and negative colloidal Nano-silver, absorption, SERS
