title: Formation of an Amine-Water Cyclic Pentamer: A New Type of Water Cluster in a Polyazacryptand.
abstract: Structural analysis of an adduct of a thiophene-based cryptand with tosylic acid shows the formation of a hybrid amine-water cyclic pentamer composed of four water molecules and one protonated amine in the charged hydrophobic cavity. The bulky tosylate groups remain outside the cavity, making the ligand favorable for hosting water molecules. Ab initio calculations based on density functional theory (DFT) confirm that the hybrid amine-water pentamer is stabilized inside the hydrophobic cavity of the cryptand.
authors.affiliation: Department of Chemistry and Biochemistry, Jackson State University, Jackson, MS 39212.
authors.forename: Musabbir A
authors.initials: MA
authors.lastname: Saeed
authors.forename: Bryan M
authors.initials: BM
authors.lastname: Wong
authors.forename: Frank R
authors.initials: FR
authors.lastname: Fronczek
authors.forename: Ramaiyer
authors.initials: R
authors.lastname: Venkatraman
authors.forename: Md Alamgir
authors.initials: MA
authors.lastname: Hossain