Determination of gas-phase ozonolysis rate coefficients of a number of sesquiterpenes at elevated temperatures using the relative rate method

Ghalaieny M., Bacak A., McGillen M., Martin D., Knights A. V., O'Doherty S., ...Daha Fazla

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, cilt.14, sa.18, ss.6596-6602, 2012 (SCI-Expanded, Scopus) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 14 Sayı: 18
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1039/c2cp23988d
  • Dergi Adı: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.6596-6602
  • Ankara Üniversitesi Adresli: Hayır

Özet

The rates of ozonolysis of four sesquiterpenes, beta-caryophyllene, alpha-humulene, isolongifolene and alpha-cedrene, are determined in the gas phase at an elevated temperature of 366 +/- 3 K and a pressure of similar to 780 Torr using the EXTreme RAnge chamber (EXTRA). The experimentally obtained rate coefficients agree with extrapolated room temperature rate coefficients for isolongifolene and alpha-cedrene but not for beta-caryophyllene and alpha-humulene, which were found to be three orders of magnitude slower than this in the literature. These new measurements support the hypothesis that operating under ambient conditions, kinetic measurements of condensable species can be influenced adversely by heterogeneous processes and should therefore be treated with caution.