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Structure and dynamics of triethylamine and tripropylamine radical cations generated in AlPO4-5 by ionizing radiation : an EPR and MO study
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- Liu, W (författare)
- Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Higashihiroshima 7398527, Japan Inst Nucl Chem & Technol, Dept Radiat Chem & Technol, PL-03195 Warsaw, Poland Linkoping Univ, Dept Phys & Measurement Technol, Chem Phys Lab, S-58183 Linkoping, Sweden
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- Yamanaka, S (författare)
- Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Higashihiroshima 7398527, Japan Inst Nucl Chem & Technol, Dept Radiat Chem & Technol, PL-03195 Warsaw, Poland Linkoping Univ, Dept Phys & Measurement Technol, Chem Phys Lab, S-58183 Linkoping, Sweden
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- Shiotani, M (författare)
- Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, Higashihiroshima 7398527, Japan Inst Nucl Chem & Technol, Dept Radiat Chem & Technol, PL-03195 Warsaw, Poland Linkoping Univ, Dept Phys & Measurement Technol, Chem Phys Lab, S-58183 Linkoping, Sweden
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- (creator_code:org_t)
- 2001
- 2001
- Engelska.
- Ingår i: Physical Chemistry, Chemical Physics - PCCP. - 1463-9076 .- 1463-9084. ; 3:9, s. 1611-1616
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- An EPR study was carried out to investigate both the structure and molecular dynamics of triethylamine (Et3N) and tripropylamine (Pr3N) radical cations generated in gamma -irradiated AlPO4-5 from neutral mother molecules incorporated as an organic template. Both Et3N+. and Pr3N+. radical cations were stable at 300 K and showed strongly temperature-dependent EPR spectral line-shapes in the temperature range from 77 to 300 K. The spectral change was successfully explained by assuming a two-site exchange model in which two inequivalent beta -hydrogens interchange their positions with each other. The experimental spectra were quantitatively analyzed by a simulation method using the exchange rate as a variable parameter. From an Arrhenius plot of the rate constants, activation energies of 9.1 and 11.4 kJ mol(-1) were evaluated for Et3N+. and Pr3N+. in AlPO4-5, respectively.
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- Liu, W
- Yamanaka, S
- Shiotani, M
- Michalik, J
- Lund, Anders
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