โ Scribed by S.W. Beavan; D. Phillips; R.G. Brown
No coin nor oath required. For personal study only.
Phosphorescence decay times of 1 ,l,l-trifluoroncetone in the vapour phue have been measured as a function of pressure of ketone with low-pmver
e:icitation from il pulsed N2 laser. A strong pressure dependence is observed, yielding a rate constant for selfquenchiag of (4.6 t 0.5) X IO6 P mol-' s-' , and an extrapolated zero-prcssurc! lifetime oi 60 ps, considerably shorter than th.at measured earlier in a higher-energy flash photolysis experiment. Reasons for these differences are discussed.
๐ SIMILAR VOLUMES
Tune-resolved fluorescence spectroscopy of poly (N-vmy I carbazolc) rn tetrahydrofuran solutton has revealed the presence of three cmtttmg spccres, namely a normal excrmer emtttmg at hmw = 420 nm. a hrghcr-energy excrmer sate at A,, = 370 nm whrch mtcrconrcrts \\ tth the "normal" stte. and a thud sp
The fiuorescence spectrum of HCN A( t A") -G(' x') is reported using a tuned ArF laser as the excitation source-Assignments for the fluorescence spectra from two upper state vibrational levels are given. Fran&-Condon factors for the absorption and fluorescence spectra are cakuhted-A !aser-induced ff