title: Conditional rotations of heteronuclear coupled spins.
abstract: We present a new pulse sequence that conditionally excites I spin magnetization only in the presence of a nonzero heteronuclear coupling to an S spin. The pulse sequence, referred to as the reverse INEPT pathway selective pulse or RIPSP, generates a pure I spin rotation by an angle that depends upon the heteronuclear coupling constant in InS spin systems. Experimental demonstrations are shown in (13)C labeled chloroform, dichloromethane, and toluene samples and in unlabeled 2,3-dibromopropionic acid and brucine samples.
authors.affiliation: Department of Chemistry, University of Miami, Coral Gables, FL 33124, USA.
authors.forename: Lauren F
authors.initials: LF
authors.lastname: O'Donnell
authors.affiliation: Department of Chemistry, University of Miami, Coral Gables, FL 33124, USA.
authors.forename: Clark D
authors.initials: CD
authors.lastname: Ridge
authors.affiliation: Department of Chemistry, University of Miami, Coral Gables, FL 33124, USA. Electronic address: jwalls@miami.edu.
authors.forename: Jamie D
authors.initials: JD
authors.lastname: Walls
keywords: Average Hamiltonian theory; Reverse INEPT; Selective excitation