title: Fluorescence properties of 3-amino phenylboronic acid and its interaction with glucose and ZnS:Cu quantum dots.
abstract: Preliminary results of a study of the interaction between 3-amino phenylboronic acid and glucose or ZnS:Cu quantum dots are presented in this paper. ZnS:Cu quantum dots with mercaptopropionic acid as a capping agent were obtained and characterized. Quenching of 3-amino phenylboronic acid fluorescence was studied by steady-state and timeresolved measurements. For fluorescence quenching with glucose the results of steady-state measurements fulfill Stern-Volmer equation. The quenching constants are increasing with growing pH. The decay of fluorescence is monoexponential with lifetime about 8.4 ns, which does not depend on pH and glucose concentration indicating static quenching. The quenching constant can be interpreted as apparent equilibrium constant of estrification of boronic group with diol. Quantum dots are also quenching 3-amino phenylboronic acid fluorescence. Fluorescence lifetime, in this case, is slightly decreasing with increasing concentration of quantum dots. The quenching constants are increasing slightly with pH's growth. Quenching mechanism of 3-amino phenylboronic acid fluorescence by quantum dots needs further experiments to be fully explained.
authors.affiliation: Lodz University of Technology, Institute of General Food Chemistry, Stefanowskiego 4/10, 90-924 Lodz, Poland.
authors.forename: Karolina
authors.initials: K
authors.lastname: Kur-Kowalska
authors.affiliation: Lodz University of Technology, Institute of General Food Chemistry, Stefanowskiego 4/10, 90-924 Lodz, Poland.
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Przybyt
authors.affiliation: Lodz University of Technology, Institute of General Food Chemistry, Stefanowskiego 4/10, 90-924 Lodz, Poland.
authors.forename: Paulina
authors.initials: P
authors.lastname: Ziółczyk
authors.affiliation: Centre of Molecular and Macromolecular Studies in Lodz, Sienkiewicza 112, 90-363 Lodz, Poland.
authors.forename: Przemysław
authors.initials: P
authors.lastname: Sowiński
authors.affiliation: Lodz University of Technology, Institute of General Food Chemistry, Stefanowskiego 4/10, 90-924 Lodz, Poland. Electronic address: ewa.miller@p.lodz.pl.
authors.forename: Ewa
authors.initials: E
authors.lastname: Miller
mesh_terms: D000586:Amination; D001897:Boronic Acids / Q000737:chemistry / Q000378:metabolism*; D003300:Copper / Q000737:chemistry / Q000378:metabolism*; D005453:Fluorescence; D005947:Glucose / Q000378:metabolism*; D045663:Quantum Dots / Q000737:chemistry / Q000378:metabolism* / Q000648:ultrastructure; D013050:Spectrometry, Fluorescence; D013440:Sulfides / Q000737:chemistry / Q000378:metabolism*; D017967:Zinc Compounds / Q000737:chemistry / Q000378:metabolism*
chemical_list: D001897:Boronic Acids; D013440:Sulfides; D017967:Zinc Compounds; D003300:Copper; D005947:Glucose; C031238:zinc sulfide; C010686:benzeneboronic acid
keywords: Boronic acid derivative; Fluorescence quenching; Quantum dots