Dawson型磷钼酸盐对水合肼和过氧化氢的可逆光谱检测  

Reversible Spectral Detection for N_(2)H_(4)·H_(2)O and H_(2)O_(2)by Dawson Type Phosphomolybdate

作　　者：包英 陆爽 王志强 王晓红[1] 许良[1,2] 王斌 刘宗瑞 BAO Ying;LU Shuang;WANG Zhiqiang;WANG Xiaohong;XU Liang;WANG Bin;LIU Zongrui(College of Chemistry and Materials Science,Inner Mongolia University for Nationalities,Tongliao 028000,Inner Mongolia Autonomous Region,China;Key Laboratory of the Natural Products Chemistry and Functional Molecular Synthesis of Autonomous Region,Tongliao 028000,Inner Mongolia Autonomous Region,China)

机构地区：[1]内蒙古民族大学化学与材料学院,内蒙古通辽028000 [2]天然产物化学及功能分子合成自治区重点实验室,内蒙古通辽028000

出　　处：《吉林大学学报（理学版）》2022年第4期985-992,共8页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:21501102);内蒙古自治区自然科学基金(批准号:2019MS02002);内蒙古自治区高等学校“青年科技英才支持计划”项目(批准号:NJYT-18-B22);内蒙古民族大学科学研究基金(批准号:NMDYB19051).

摘　　要：基于Dawson型磷钼酸盐(NH_(4))_(6)P_(2)Mo_(18)O_(62)(P_(2)Mo_(18))可逆的氧化还原及变色性质,利用紫外-可见光谱可实现P_(2)Mo_(18)溶液对水合肼(N_(2)H_(4)·H_(2)O)及过氧化氢(H_(2)O_(2))的可逆检测.在P_(2)Mo_(18)溶液中加入等量N_(2)H_(4)·H_(2)O后,P_(2)Mo_(18)被还原,溶液由浅黄色变为蓝绿色,随着N_(2)H_(4)·H_(2)O浓度的增加,在可见区400~800 nm的吸收峰逐渐增强;在还原态P_(2)Mo_(18)溶液中加入等量H_(2)O_(2)后,还原态P_(2)Mo_(18)重新被氧化,溶液由蓝绿色变为浅黄色,随着H_(2)O_(2)浓度的增加,在可见区的吸收峰逐渐降低.以750 nm处的吸光度对N_(2)H_(4)·H_(2)O和H_(2)O_(2)的浓度做图,获得紫外-可见光谱法对N_(2)H_(4)·H_(2)O和H_(2)O_(2)检测的线性方程、线性检测范围及检出限,并利用紫外-可见动力学法和光谱法对该探针的响应时间、可逆性及抗干扰性进行研究.结果表明:该方法对N_(2)H_(4)·H_(2)O和H_(2)O_(2)的检出限分别为7.24×10^(-5),2.15×10^(-4)mmol/L;对N_(2)H_(4)·H_(2)O和H_(2)O_(2)检测的响应时间分别为44.8,23.9 min.The reversible detection for hydrazine hydrate(N_(2)H_(4)·H_(2)O)and hydrogen peroxide(H_(2)O_(2))in P_(2)Mo_(18)solution could be realized by ultraviolet-visible(UV-Vis)spectrum based on the reversible redox and allochroic properties of Dawson type phosphomolybdate(NH_(4))_(6)P_(2)Mo_(18)O_(62)(P_(2)Mo_(18)).After adding the same amount of N_(2)H_(4)·H_(2)O to P_(2)Mo_(18)solution,the P_(2)Mo_(18)was reduced,and the solution changed from light yellow to blue-green.The absorption peak in the visible region of 400—800 nm gradually increaseed with the increase of N_(2)H_(4)·H_(2)O concentration.After adding the same amount of H_(2)O_(2)to the reduced P_(2)Mo_(18)solution,the reduced P_(2)Mo_(18)was oxidized again and the solution changed from blue-green to light yellow.The absorption peak in the visible region gradually decreased with the increase of H_(2)O_(2)concentration.The linear equation,linear detection range and detection limit of N_(2)H_(4)·H_(2)O and H_(2)O_(2)were obtained by drawing concentrations of N_(2)H_(4)·H_(2)O and H_(2)O_(2)with the absorbance at 750 nm.The response time,reversibility and anti-interference of the probe were studied by UV-Vis kinetic method and spectral method.The results show that the detection limits for N_(2)H_(4)·H_(2)O and H_(2)O_(2)are 7.24×10^(-5),2.15×10^(-4)mmol/L,the response time for N_(2)H_(4)·H_(2)O and H_(2)O_(2)detection are 44.8,23.9 min,respectively.

关 键 词：多金属氧酸盐 水合肼 刺激响应 可逆变色性质 光谱检测 

分 类 号：O611.3[理学—无机化学]