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Fluorescence Properties of 3-amino Phenylboronic Acid and Its Interaction With Glucose and ZnS:Cu Quantum Dots

Karolina Kur-Kowalska, Małgorzata Przybyt, Paulina Ziółczyk, Przemysław Sowiński, Ewa Miller

Spectrochim Acta A Mol Biomol Spectrosc. 2014 Aug 14;129:320-5.

PMID: 24747855

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.

Chemicals Related in the Paper:

Catalog Number Product Name Structure CAS Number Price
LS793678 (3-acetamido-5-carboxy)phenylboronic acid (3-acetamido-5-carboxy)phenylboronic acid Price
LS793961 3-(trans-4-Hydroxycyclohexylcarbamoyl)phenylboronic acid 3-(trans-4-Hydroxycyclohexylcarbamoyl)phenylboronic acid Price
LS793996 4-(5-oxopyrazolidin-3-yl)phenylboronic acid 4-(5-oxopyrazolidin-3-yl)phenylboronic acid Price
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