title: Phosphate binding with a thiophene-based azamacrocycle in water.
abstract: Structural characterization of the phosphate complex with a thiophene-based macrocycle suggests that two dihydrogen phosphates in a dimeric form are encapsulated in the cavity via several hydrogen bonds from NH···O and CH···O interactions. In the lattice framework, the two dimers are linearly hydrogen-bonded to form a tetramer.1H NMR titrations suggest that the host forms a 1:1 complex with phosphate, showing an association constant of 120 M-1in D2O at pH = 5.5. The host guest complexation was further confirmed by ESI-MS in a gas phase.
authors.affiliation: Department of Chemistry and Biochemistry, Jackson State University, Jackson, MS 39217.
authors.forename: Musabbir A
authors.initials: MA
authors.lastname: Saeed
authors.forename: Avijit
authors.initials: A
authors.lastname: Pramanik
authors.forename: Md Alamgir
authors.initials: MA
authors.lastname: Hossain
keywords: Anion binding; Azamacrocycle; Ditopic complex; Phosphate complex