Journal
TETRAHEDRON LETTERS
Volume 48, Issue 29, Pages 5125-5129Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2007.05.075
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A two-component saccharide sensing system using the fluorescent dye, hydroxypyrene trisulfonic acid, combined with a boronic acid functional viologen as a receptor/quencher in pH 7.4 buffer solution has been further investigated. The effect of substituents on the acidity of the boronic acid was measured. The boronic acid pK(a) changed in the expected manner when electron donating or withdrawing groups were present. The glucose binding constants were dependent on pK(a) but no simple correlation was observed for the Stern-Volmer quenching constants and the fluorescence signal modulation. Published by Elsevier Ltd.
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