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- W2000280614 endingPage "1131" @default.
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- W2000280614 abstract "The effects of the polymeric matrix on the photophysical properties of monomeric dyes reactive to Excited State Intramolecular Proton Transfer (ESIPT) were evaluated by UV–Vis absorption and steady-state and time-resolved emission spectroscopies. A radical polymerization reaction was used to produce new photoactive styrene-based polymeric matrices. The fluorescent polymers had their structural, thermal, electrochemical and photophysical properties evaluated. The benzazole monomers presented excited-state properties dependent on the viscosity induced by the polymeric media, wherein only the ESIPT process extension was unfavoured once the species stability in the excited state did not vary, as observed in the analysis of their fluorescence lifetimes when diluted in organic solvent. Additional experiments performed in the highly viscous non-polar aprotic solvent Nujol, as well as theoretical predictions by the analysis of the energy barriers relative to both the excited state reaction and rotational conformers, performed at the CAM-B3LYP/6–311 + G(d,p) level of theory corroborate these observations. The theoretical calculations showed that the activation energies relative to the conformational balances in the excited state were extremely increased in comparison to those on the ground state, indicating that viscosity is a significant driving force to the ESIPT process." @default.
- W2000280614 created "2016-06-24" @default.
- W2000280614 creator A5057704685 @default.
- W2000280614 creator A5082339689 @default.
- W2000280614 date "1994-01-01" @default.
- W2000280614 modified "2023-10-18" @default.
- W2000280614 title "Radical polymerization, co-polymerization, and chain transfer of α-substituted acrylic esters" @default.
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