Thomas Schmidt, H. E. Smorenburg, S. Völker, H. van der Laan,
"Permanent Hole-Burning with a Diode-Laser. Excited State Dynamics of Bacteriochlorophyll in Glasses and Micelles"
, 1992, H. van der Laan, H.E.Smorenburg, Th.Schmidt, S.Völker: Permanent Hole-Burning with a Diode-Laser. Excited State Dynamics of Bacteriochlorophyll in Glasses and Micelles, J.Opt.Soc.Am.B 9 (1992) 931.
Original Titel:
Permanent Hole-Burning with a Diode-Laser. Excited State Dynamics of Bacteriochlorophyll in Glasses and Micelles
Sprache des Titels:
Englisch
Englische Kurzfassung:
A temperature- and current-controlled diode laser at ~780nm was used to perform permanent hole-burning experiments on the S1<-S0 0-0 (Qy) transition of
bacteriochlorophyll-a (BChl-a) in amorphous hosts. Hole widths were obtained for the glass triethylamine (TEA) between 0.4 and 15K, for micelles of the detergent
lauryldimethylamine N-oxide (LDAO) between 1.2 and 4.2K, and for wet and dry CCl4 at 1.2K. The homogeneous linewidth, Ghom, of BChl-a in TEA follows a T^1.3 dependence at temperatures T<7K, wheras at T~7K a crossover to an exponential dependence with an
activation energy of 33cm^-1 is observed. The results, when compared with those obtained for free-base porphin in the same glass, suggest that a low-frequency mode of TEA is responsible for the dephasing. From the experiments on micelles conclusions are drawn about the molecular confirmations of BChl-a in the detergent.
Erscheinungsjahr:
1992
Notiz zum Zitat:
H. van der Laan, H.E.Smorenburg, Th.Schmidt, S.Völker: Permanent Hole-Burning with a Diode-Laser. Excited State Dynamics of Bacteriochlorophyll in Glasses and Micelles, J.Opt.Soc.Am.B 9 (1992) 931.