Visible Fluorescence Chemosensor for Saxitoxin
Absorption spectra of a number of shellfish extracts have been obtained and reveal prominent absorptions in all samples at 210 and 260 nm and at 325 nm in some of them. These absorptions preclude the use of chromophores with similar absorptions in testing of shellfish samples for paralytic shellfish...
Saved in:
Published in | Journal of organic chemistry Vol. 72; no. 6; pp. 2187 - 2191 |
---|---|
Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
WASHINGTON
American Chemical Society
16.03.2007
Amer Chemical Soc |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Absorption spectra of a number of shellfish extracts have been obtained and reveal prominent absorptions in all samples at 210 and 260 nm and at 325 nm in some of them. These absorptions preclude the use of chromophores with similar absorptions in testing of shellfish samples for paralytic shellfish toxins. Two crown ether chemosensors featuring a boron azadipyrrin chromophore have been synthesized; both have absorption maxima at 650 nm, where all the shellfish extracts are transparent. The synthetic sensors feature either 18- or 27-membered crown ether rings and have been evaluated as visible sensors for the paralytic shellfish toxin saxitoxin. The binding constant for one of them is in the range of 3−9 × 105 M-1 and exhibits a fluorescence enhancement of over 100% at 680 nm in the presence of 40 μM saxitoxin. |
---|---|
Bibliography: | istex:9D3FBA5508CD197690132E4181B0A818A1AC8D7B ark:/67375/TPS-M9FPKJ4V-L Medline NIH RePORTER |
ISSN: | 0022-3263 1520-6904 |
DOI: | 10.1021/jo062506r |