title: Colorimetric detection of riboflavin by silver nanoparticles capped with β-cyclodextrin-grafted citrate.
abstract: β-Cyclodextrin-grafted citrate was used for the first time as a stabilizer and reducer to prepare silver nanoparticles (AgNPs). The as-synthesized AgNPs were further characterized by UV-vis absorption spectroscopy, powder X-ray diffraction spectroscopy, and transmission electron microscopy. The results show that the presence of riboflavin caused severe aggregation of the nanoparticles, thereby inducing a colour change from yellow to red.1H NMR further verified the formation of non-inclusion complexes between riboflavin and β-cyclodextrin-grafted citrate. Hydrogen bond was considered the main driving force of the interaction between the riboflavin and external rim of β-cyclodextrin. Based on these observations, the as-synthesized AgNPs were utilized to develop a novel colorimetric sensor for riboflavin detection. This colorimetric probe showed excellent selectivity and high sensitivity for riboflavin with a detection limit of 167nM.
authors: College of Chemistry and Environmental Engineering, and Institute of Applied Chemistry, Shanxi Datong University, Datong, Shanxi 037009, China.
authors: Qi
authors: Q
authors: Ma
authors: College of Chemistry and Environmental Engineering, and Institute of Applied Chemistry, Shanxi Datong University, Datong, Shanxi 037009, China; Institute of Environmental Science, Shanxi University, Taiyuan 030006, China. Electronic address: songjphxsxdt@163.com.
authors: Jinping
authors: J
authors: Song
authors: College of Chemistry and Environmental Engineering, and Institute of Applied Chemistry, Shanxi Datong University, Datong, Shanxi 037009, China.
authors: Sufang
authors: S
authors: Zhang
authors: College of Chemistry and Environmental Engineering, and Institute of Applied Chemistry, Shanxi Datong University, Datong, Shanxi 037009, China.
authors: Meifang
authors: M
authors: Wang
authors: College of Chemistry and Environmental Engineering, and Institute of Applied Chemistry, Shanxi Datong University, Datong, Shanxi 037009, China. Electronic address: ybsy_guo@163.com.
authors: Yong
authors: Y
authors: Guo
authors: Institute of Environmental Science, Shanxi University, Taiyuan 030006, China.
authors: Chuan
authors: C
authors: Dong
mesh_terms: D019343:Citric Acid / Q000737:chemistry*; D003124:Colorimetry / Q000379:methods*; D053768:Metal Nanoparticles / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D012256:Riboflavin / Q000032:analysis*; D012834:Silver / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: D047392:beta-Cyclodextrins; D019343:Citric Acid; D012834:Silver; C031215:betadex; D012256:Riboflavin
keywords: Ag nanoparticles; Colorimetric sensor; Riboflavin; β-Cyclodextrin-grafted citrate