Free jet excitation and emission spectra of diphenylbutadiene

Free jet excitation and emission spectra of diphenylbutadiene.

Highly resolved emission and one-photon fluorescence excitation spectra for 1,4-diphenyl-1,3-butadiene seeded in a supersonic expansion of helium have been measured. The spectra show a long-lived (52.8 nsec for excitation at the 0-0) state at 29,652.5 cm(-1), approximately 1,150 cm(-1) below the well-characterized (1)B(u) state, which is assigned as (1)A(g)-i.e., we have directly observed a pol...

One- and two-photon fluorescence excitation spectra of the 2 Ag states of linear tetraenes in free jet expansions

Oneand two-photon fluorescence excitation spectra of the S1←S0 transitions of the all-trans isomers of 1,3,5,7-octatetraene, 1,3,5,7-nonatetraene, and 2,4,6,8-decatetraene have been obtained in free jet expansions. Comparison of the oneand two-photon spectra allows the unambiguous identification of electronic and vibronic origins and, for octatetraene and decatetraene, provides clear evidence f...

Fluorescence spectra of all trans 1 , 4 - diphenylbutadiene obtained by the two - photon excitation into the 21 Ag state

Rotational Analyses of the Laser Induced Fluorescence Excitation Spectra of Jet-Cooled CF3O and CF3S

The high resolution, rotationally resolved laser induced fluorescence spectra for the A2A1 left and right arrow X2E transitions of CF3O and CF3S were recorded. In addition to the origins, the symmetric vibrational band 301 and the nontotally symmetric bands 501 and 601 were analyzed for CF3O, while for CF3S the symmetric bands 101, 201, and 301, as well as the nontotally symmetric bands 601, 30...

Design and Manufacturing of Jet to free Stream Simulator to Experimental Study of Interaction of Oblique Jet in Crossflow

The study of interactions of jet into cross flow at different longitudinal and transverse angles of jet was studied. The following components were designed and constructed: a low velocity wind tunnel to produce the uniform flow, a flat plate with a traverse injection system to simulate the jet injection, and a spatial rake to measure the total pressure. The tests were carried out at longitudina...