title: Determination of hyperin in seed of Cuscuta chinensis Lam. by enhanced chemiluminescence of CdTe quantum dots on calcein/K3Fe(CN)6 system.
abstract: In this paper, 3-mercaptocarboxylic acid (MPA) modified CdTe quantum dots (QDs) were used as sensitizers, to enhance the chemiluminescence (CL) of the calcein/K(3)Fe(CN)(6) system. A new CL system of CdTe/calcein/K(3)Fe(CN)(6) was developed. The effects of reactant concentrations and the particle sizes of CdTe QDs on the CL emission were investigated in detail. The possible enhancement mechanism of the CL was also further investigated based on the photoluminescence (PL) and CL spectra. Polyphenols such as chlorogenic acid, quercetin, hyperin, catechin and kaempferol, were observed to inhibit the CL signal of the CdTe/calcein/K(3)Fe(CN)(6) system and determined by the proposed method. The proposed method was applied to the determination of hyperin in seed of Cuscuta chinensis Lam. and the results obtained were satisfactory.
authors: Department of Analytical Chemistry, College of Chemistry, Jilin University, Changchun 130012, PR China.
authors: Jing
authors: J
authors: Kang
authors: Xuwen
authors: X
authors: Li
authors: Jiayang
authors: J
authors: Geng
authors: Lu
authors: L
authors: Han
authors: Jieli
authors: J
authors: Tang
authors: Yongri
authors: Y
authors: Jin
authors: Yihua
authors: Y
authors: Zhang
mesh_terms: D002104:Cadmium / Q000737:chemistry; D034182:Cuscuta / Q000737:chemistry*; D005292:Ferricyanides / Q000737:chemistry; D005452:Fluoresceins; D008163:Luminescent Measurements / Q000295:instrumentation / Q000379:methods*; D010936:Plant Extracts / Q000032:analysis*; D045663:Quantum Dots; D011794:Quercetin / Q000031:analogs & derivatives* / Q000032:analysis; D012639:Seeds / Q000737:chemistry*; D013691:Tellurium / Q000737:chemistry
chemical_list: D005292:Ferricyanides; D005452:Fluoresceins; D010936:Plant Extracts; D002104:Cadmium; C021304:hyperoside; D011794:Quercetin; D013691:Tellurium; C028033:potassium ferricyanide; C007740:fluorexon