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  • Title: Synthesis, complexation, and fluorescence behavior of 3,4-dimethylthieno[2,3-b]thiophene carrying two monoaza-15-crown-5 ether groups.
    Author: Wu YX, Cao J, Deng HY, Feng JX.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2011 Nov; 82(1):340-4. PubMed ID: 21839672.
    Abstract:
    A novel fluoroionophore 1 based on 3,4-dimethylthieno[2,3-b]thiophene bearing two monoaza-15-crown-5 ethers at 3- and 4-positions was prepared. UV-vis and fluorescence responses of compound 1 upon the addition of alkali and alkaline earth metal cations were evaluated in acetonitrile solution. Receptor 1 showed unique response for Ba(2+) due to the formation of an intramolecular sandwich complex.
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