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Thiourea derived Tröger's bases as molecular cleft receptors and colorimetric sensors for anions.

The Journal of organic chemistry (2013-08-01)
Elaine M Boyle, Steve Comby, Jennifer K Molloy, Thorfinnur Gunnlaugsson
ABSTRAKT

Thiourea-functionalized Tröger's base receptors 1 and 2 have been synthesized and evaluated as novel for the recognition of anions. Receptor 2 gave rise to significant changes in the absorption spectrum upon titration with AcO(-) and H2PO4(-) and acted as a colorimetric sensor for F(-), the interaction of which was also evaluated using (1)H NMR spectroscopy.

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Sigma-Aldrich
Thiourea, ACS reagent, ≥99.0%
Sigma-Aldrich
Thiourea, ReagentPlus®, ≥99.0%