title: The energy gap law for triplet states in Pt-containing conjugated polymers and monomers.
abstract: The energy gap law established for aromatic hydrocarbons and rare earth ions relates the nonradiative decay rate to the energy gap of a transition through a multiphonon emission process. We show that this energy gap law can be applied to the phosphoresce of a series of conjugated polymers and monomers for which the radiative decay rate has been enhanced through incorporation of a heavy metal. We find that the nonradiative decay rate from the triplet state T(1) increases exponentially with decreasing T(1)-S(0) gap for the polymers and monomers at 300 and 20 K. Comparison of the nonradiative decay of polymers with that of their corresponding monomers highlights the role of electron-lattice coupling.
authors.affiliation: Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom.
authors.forename: J S
authors.initials: JS
authors.lastname: Wilson
authors.forename: N
authors.initials: N
authors.lastname: Chawdhury
authors.forename: M R
authors.initials: MR
authors.lastname: Al-Mandhary
authors.forename: M
authors.initials: M
authors.lastname: Younus
authors.forename: M S
authors.initials: MS
authors.lastname: Khan
authors.forename: P R
authors.initials: PR
authors.lastname: Raithby
authors.forename: A
authors.initials: A
authors.lastname: Köhler
authors.forename: R H
authors.initials: RH
authors.lastname: Friend