title: Highly selective and sensitive detection of 2,4,6-trinitrophenol by using newly developed blue-green photoluminescent carbon nanodots.
abstract: Though many methods of detecting 2,4,6-trinitrophenol (TNP) mainly have been developed recent years, quantification of TNP in environmental matrixes still faces up to great challenges because all the nitroaromatic explosives reveal highly similar chemical structure. In the present work, we have developed a selective and sensitive method for detection of TNP by amorphous photoluminescent carbon nanodots (CNDs), which are prepared through a simple hydrothermal route using spermine and m-phenylenediamine (MPD) as precursors. The as-prepared CNDs are found to show blue-green photoluminescence, excitation-wavelength independence, and excellent chemical and optical stability. Owing to the strong characteristic absorption of TNP at 356nm (ε=1.048×104cm-1M-1), which has a good spectral overlap with the excitation band of CNDs, the fluorescence intensity of CNDs at 490nm is linearly quenched with the adding concentration of TNP in the range of 0.1-100μM. The developing assay based on inner filter effect (IFE) mechanism for the detection of TNP is selective and convenient, showing that the as-prepared CNDs have applicable prospect in the concept of simplicity and specificity in analytical chemistry.
authors: Key Laboratory on Luminescence and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
authors: Meng Li
authors: ML
authors: Liu
authors: Key Laboratory on Luminescence and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
authors: Bin Bin
authors: BB
authors: Chen
authors: College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China.
authors: Ze Xi
authors: ZX
authors: Liu
authors: Key Laboratory on Luminescence and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China; College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China. Electronic address: chengzhi@swu.edu.cn.
authors: Cheng Zhi
authors: CZ
authors: Huang
mesh_terms: D002244:Carbon / Q000737:chemistry*; D060766:Drinking Water / Q000032:analysis; D005453:Fluorescence; D060106:Lakes / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry*; D010851:Picrates / Q000032:analysis* / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
chemical_list: D060766:Drinking Water; D010851:Picrates; D014874:Water Pollutants, Chemical; D002244:Carbon; C005858:picric acid
keywords: 2,4,6-Trinitrophenol (TNP); Carbon nanodots (CNDs); Hydrothermal route; Inner filter effect