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Construction of a 19-Metal Cd(II)-Eu(III) Nanocluster for Visual and Real-Time Detection of Biopterin (a Cancer
Ting Lan1, Yanan Ma2, Shiqing Wang1
1College of Chemistry and Materials Engineering, Wenzhou University, Zhejiang Key Laboratory of Carbon Materials, Key Lab of Bio Health Materials and Chemistry of Wenzhou, Wenzhou 325035, China.
Abstract:
A 19-metal Cd(II)-Eu(III) nanocluster (1, sizes: 1.6 nm × 1.6 nm × 2.4 nm) was constructed for the luminescence detection of biopterin (Bio). Under the excitation at 380 nm, the enhancement of Eu(III) luminescence caused by Bio is described by I615 nm = k × [Bio] + a, which is used to determine the concentrations of Bio in CH3CN, fetal calf serum, and urine with high sensitivity and selectivity. Prepared test strips of 1 are used to qualitatively check Bio through the color change to red, and real-time quantitative analysis of Bio can be further achieved through smartphone scanning. The luminescence response time of 1 toward Bio is less than 5 s, and the limits of detection are from 0.11 to 0.22 nM (ppb level).
