Ion-Pair Complexes of Pyrylium and Tetraarylborate as New Host-Guest Dyes: Photoinduced Electron Transfer Promoting Radical Polymerization

Author(s)

Santos, Willy G. ^{[1, 2]} ; Budkina, Darya S. ^[3] ; Santagneli, Silvia H. ^[1] ; Tarnovsky, Alexander N. ^[3] ; Zukerman-Schpector, Julio ^[2] ; Ribeiro, Sidney J. L. ^[1]

Affiliation

^[1] Sao Paulo State Univ, Inst Chem, UNESP, CP 355, BR-14801970 Araraquara, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Chem, UFSCar, CP 676, BR-13565905 Sao Carlos, SP - Brazil

^[3] Bowling Green State Univ, Ctr Photochem Sci, Dept Chem, Bowling Green, OH 43403 - USA

• Document type: Journal article
• Source: Journal of Physical Chemistry A; v. 123, n. 34, p. 7374-7383, AUG 29 2019.
• Web of Science Citations: 5

Abstract

Ultrafast transient absorption spectroscopy, NOESY-NMR, and EPR spectroscopy shed light on how pi-pi stacking interactions combined with electrostatic interactions can be used to form stable ion-pair complexes between pyrylium and tetraarylborate ions in which the interaction of the pi-delocalized clouds promotes the observation of new radiative processes and also electron transfer processes excitation using visible light. The results exhibit a striking combination of properties, chemical stability and photophysical and photochemical events, that make these ion-pair complexes as a step toward the realization of chromophore/luminescent materials and also their use as a new monophotoinitiator system in radical polymerization reactions. (AU)

• FAPESP's process: 11/51555-7 - Bread and meat for the future
• Grantee: Daniel Rodrigues Cardoso
• Support Opportunities: Regular Research Grants
• FAPESP's process: 17/01189-0 - Novel aging: technologies and solutions to manufacture novel dairy products for healthy aging
• Grantee: Daniel Rodrigues Cardoso
• Support Opportunities: Research Projects - Thematic Grants