Mao H, Thorne JB, Pharr JS, Gawley RE. Effect of Crown Ether Ring Size on Binding and Fluorescence Response to Saxitoxin in Anthracylmethyl Monoaza Crown Ether Chemosensors.
CAN J CHEM 2006;
84:1273-1279. [PMID:
21562619 PMCID:
PMC3090159 DOI:
10.1139/v06-093]
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Abstract
Convenient macrocyclization synthetic routes for the preparation of different-sized monoaza anthracylmethyl crown ether chemsensors (15-crown-5, 18-crown-6, 21-crown-7, 24-crown-8 and 27-crown-9) are described. Evaluation of these crowns as chemosensors for saxitoxin revealed that the larger crowns have moderately higher binding constants, with the 27-crown-9 chemosensor having the largest binding constant: 2.29×10(5) M(-1). Fluorescence enhancements of 100% were observed at saxitoxin concentrations of 5 μM, which is close to the detection limit in mouse bioassay.
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