Pyrrolylamidourea based anion receptors

The anion binding behaviour of a number of pyrrolylamidourea and thiourea compounds have been studied in DMSO solution. Mono-amidothioureapyrrole compounds were found to be deprotonated by basic anions such as fluoride, acetate, benzoate or dihydrogenphosphate with the structure of the deprotonated species elucidated by X-ray crystallography. 2,5-Bis-amidoureapyrroles were synthesized and found to be effective anion receptors for a range of putative anionic guests.

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