title: A novel application for 222Rn emanation standards: radon-cryptophane host chemistry.
abstract: In collaboration with the University of Pennsylvania, a (222)Rn emanation source was used for the determination of the binding affinity of radon to a cryptophane molecular host. This source was similar to a (222)Rn emanation standard that was developed and disseminated by the National Institute of Standards and Technology (NIST). The novel experimental design involved performing the reactions at femtomole levels, developing exacting gravimetric sampling methods and making precise (222)Rn assays by liquid scintillation counting. A cryptophane-radon association constant was determined, K(A)=(49,000±12,000) L mol(-1) at 293 K, which was the first measurement of radon binding to a molecular host.
authors.affiliation: Physical Measurement Laboratory, National Institute of Standards and Technology,(1) 100 Bureau Drive Gaithersburg, MD 20899-8462, USA. lizbeth.laureano-perez@nist.gov
authors.forename: L
authors.initials: L
authors.lastname: Laureano-Perez
authors.forename: R
authors.initials: R
authors.lastname: Collé
authors.forename: D R
authors.initials: DR
authors.lastname: Jacobson
authors.forename: R
authors.initials: R
authors.lastname: Fitzgerald
authors.forename: N S
authors.initials: NS
authors.lastname: Khan
authors.forename: I J
authors.initials: IJ
authors.lastname: Dmochowski
mesh_terms: D006207:Half-Life; D038622:Internationality; D011083:Polycyclic Compounds / Q000737:chemistry*; D011829:Radiation Dosage; D011874:Radiometry / Q000295:instrumentation / Q000592:standards*; D011886:Radon / Q000032:analysis / Q000737:chemistry* / Q000592:standards*; D012015:Reference Standards; D012016:Reference Values
chemical_list: D011083:Polycyclic Compounds; C523242:cryptophane; D011886:Radon