title: Ultrafast Proton Transfer in Polymer Blends Triggered by Shock Waves.
abstract: We describe ultrafast proton transfer in the ground electronic state triggered by the use of shock waves created by high-speed impacts. The emission of Nile Red (NR), a polarity sensing dye, was used to probe the effects of shock compression in a series of polymers, including polymer Brønsted bases blended with organic acid proton donors. NR undergoes a shock-induced red-shift due to an increase both in density and in polymer polarity. In blends with poly(4-vinylpyridine) (PVP) and phenol, NR showed an excess shock-induced red-shift with a distinct time dependence not present in controls that are incapable of proton transfer. The excess red-shift first appeared with 0.8 km·s-1impacts. Occurring in ca. 10 ns, this NR red-shift was caused by the formation of an ion pair created by shock-triggered proton transfer from phenol to PVP.
authors.affiliation: Department of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Yi
authors.identifier: 0000-0002-6952-6620
authors.initials: Y
authors.lastname: Ren
authors.affiliation: Department of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Alexandr A
authors.initials: AA
authors.lastname: Banishev
authors.affiliation: Department of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Kenneth S
authors.identifier: 0000-0001-5422-0701
authors.initials: KS
authors.lastname: Suslick
authors.affiliation: Department of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Jeffrey S
authors.identifier: 0000-0001-5841-6269
authors.initials: JS
authors.lastname: Moore
authors.affiliation: Department of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
authors.forename: Dana D
authors.initials: DD
authors.lastname: Dlott