双极四齿配体的合成及其超分子聚合物共振光散射法测定锰  

Synthesis of Bipolar Tetradentate Ligands and Application of Their Supramolecular Polymers in Determination of Manganese by Resonance Light Scattering

作　　者：郦志阳 苏昌霖 廖力夫[1] 肖锡林 LI Zhi-yang;SU Chang-lin;LIAO Li-fu;XIAO Xi-lin((.School ol Chemistry and Chemical Engineering,University of Sonth China,Hengyang 421001,China;School of Resouree&Environment and Safety Engineeing,University of Sonth China,Hesgyang 421401,China)

机构地区：[1]南华大学化学化工学院,湖南衡阳421001 [2]南华大学资源环境与安全工程学院,湖南衡阳421001

出　　处：《分析测试学报》2019年第12期1475-1480,共6页Journal of Instrumental Analysis

基　　金：国家自然科学基金资助项目(11475079).

摘　　要：锰是人体必需的微量元素之一;但摄入过量的锰也会导致中毒甚至死亡,所以开发一种低成本、高灵敏度、操作简便的检测锰离子的新方法显得尤为重要。该文采用水杨醛和3,3′-二氨基联苯胺合成双极四齿主体配体Bis-salophen,再用3,3′-二氨基联苯胺作为客体配体,通过自组装,利用共振光散射(Resonance light scattering,RLS)技术实现对Mn2+的检测。利用软件Visual Minteq模拟不同酸度下的锰离子形态,实验研究表明,在缓冲溶液为Tris-HCl、酸度为pH 7.5、反应温度为20℃、反应时间为15 min的优化条件下,RLS强度与Mn2+浓度在0.4~6.0 nmol/mL范围内呈良好的线性关系,回归方程为IRLS=270.64 c(nmol/mL)+1 530.21,相关系数(r)为0.999 4,检出限为0.13 nmol/mL,并已成功应用于湘江水样和生活用水中锰离子的检测。Manganese is one of the essential trace elements in human body,but excessive intake of manganese may cause poisoning and even death.Therefore,it is of great significance to develop a new method for detection of manganese ions,which is low-cost,high sensitive and easy to operate.A kind of bipolar tetradentate host ligand bis-salophen was synthesizd with salicylaldehyde and 3,3′-diaminobenzidine and self-assembled with 3,3′-diaminobenzidine as a guest ligand to form a bis-salophen supramolecular polymer which was used in the detection of Mn2+ by resonance light scattering(RLS) technique.The morphologies of manganese ions under different acidity were simulated by using a software Visual Minteq.Experimental results showed that under the optimized conditions of Tris-HCl buffer solution,acidity of pH 7.5,reaction temperature of 20 ℃ and reaction time of 15 min,there was a good linear relationship between RLS intensity and concentration of manganese ions in solution,with a correlation coefficient(r) of 0.999 4,a linear range of 0.4-6.0 nmol/mL,a linear regression equation of IRLS=270.64 c(nmol/mL)+1 530.21.The limit of detection was 0.13 nmol/mL.The bis-salophen supramolecular polymer was successfully applied in the detection of manganese ions in Xiangjiang River water and domestic water.

关 键 词：超分子聚合物 共振光散射 锰 配位化学 自组装 

分 类 号：O433.4[机械工程—光学工程] O641.4[理学—光学]