摘要
将VC等量加入Eu-PMo_(12)O_(40)溶液中,PMo_(12)O_(40)_3-被还原由浅黄色变为蓝色,同时Eu^(3+)的荧光淬灭。利用UV-Vis、PL光谱法分别测定不同VC浓度下Eu-PMo_(12)O_(40)的紫外可见光谱、荧光光谱,以700 nm处的吸光度对VC浓度作图,得到VC的线性检测范围为0~0.40 mmol·L^(-1)、检出限为0.025 8μmol·L^(-1);以591 nm处的荧光强度对VC浓度作图,获得VC的线性检测范围为0~0.64 mmol·L^(-1)、检出限为0.036 1μmol·L^(-1)。最后,在VC还原和H_2O_2氧化下,研究了Eu-PMo_(12)O_(40)变色/荧光开关性质的可逆性以及对VC检测的可重复使用性。
The color of Eu-PMo12O40 solution changed from light yellow to blue and the luminescence of Eu^3＋was quenched when a certain amount of Vitamin C was added. Meanwhile, the UV-Vis spectra and PL spectra of EuPMo12O40 solution with varied Vitamin C concentrations were measured. The absorbance at 700 nm to Vitamin C concentrations is linear in the range from 0 to 0.40 mmol·L^-1with a detection limit of 0.025 8 μmol·L^-1, and the luminescence intensity at 591 nm to Vitamin C concentration is linear in the range from 0 to 0.64 mmol·L^-1with a detection limit of 0.036 1 μmol·L^-1. More importantly, the Eu-PMo12O40 solution displayed reversible color change and luminescence switching bi-functional properties under the oxidation of H-2O-2 and reduction of Vitamin C.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2016年第6期994-1000,共7页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.21501102)
内蒙古自治区自然科学基金(No.2015BS0207)
内蒙古民族大学科学研究基金(No.NMDGP1501)
内蒙古民族大学博士科研启动基金(No.BS338)资助项目
