Time-resolved spectrometry of the transient species: the case of TICT states

1993 ◽  
Author(s):  
Z. R. Grabowski ◽  
J. Dobkowski
Keyword(s):  
Transient Species ◽  
Time Resolved ◽  
Tict States

Time-resolved resonance Raman spectra of transient species of photochromic 2-(2′,4′-dinitrobenzyl) pyridine

1986 ◽  
Vol 146 ◽  
pp. 91-99 ◽  
Author(s):  
Hiroaki Takahashi ◽  
Shigeru Hirukawa ◽  
Shinichi Suzuki ◽  
Yoshimi Torii ◽  
Hiroaki Isaka
Keyword(s):  
Raman Spectra ◽  
Resonance Raman ◽  
Transient Species ◽  
Time Resolved ◽  
Resonance Raman Spectra

Time-resolved resonance Raman studies of transient species in the photoionization of N,N,N′,N′-tetramethyl-p-phenylenediamine in solution

1987 ◽  
Vol 38 ◽  
pp. 167-175 ◽  
Author(s):  
Hiroaki Isaka ◽  
Shinichi Suzuki ◽  
Tomoyuki Ohzeki ◽  
Yoshiki Sakaino ◽  
Hiroaki Takahashi
Keyword(s):  
Resonance Raman ◽  
Transient Species ◽  
Time Resolved

Fast time-resolved FTIR detection of short-lived photochemical transient species in solution: a direct comparison with IR laser spectroscopy

1985 ◽  
Vol 89 (5) ◽  
pp. 850-853 ◽  
Author(s):  
Barry D. Moore ◽  
Martyn Poliakoff ◽  
Michael B. Simpson ◽  
James J. Turner
Keyword(s):  
Laser Spectroscopy ◽  
Fast Time ◽  
Transient Species ◽  
Time Resolved ◽  
Ir Laser

scholarly journals Primary Photochemical Dynamics of a Triply-Bonded Metal Carbonyl Dimer Probed Via Ultrafast Infrared Spectroscopy

2018 ◽  
Author(s):  
Justin Lomont ◽  
Son Nguyen ◽  
Charles Harris
Keyword(s):  
Density Functional ◽  
Metal Carbonyl ◽  
Density Functional Theory Calculations ◽  
Transient Species ◽  
Trans Conformation ◽  
Functional Theory ◽  
Time Resolved ◽  
Distorted Structure ◽  
Triplet Spin State ◽  
Transient Intermediate

<div>The primary photochemical dynamics of [Cp*Cr(CO)2]2 have been studied using picosecond time-resolved infrared (TRIR) spectroscopy. Upon visible or UV photoexcitation, the primary photochemical pathway is formation of a transient rear- rangement isomer with a weakened Cr≡Cr bond and two terminal carbonyl ligands rearranged to a bridging conformation. This species reverts to the parent dimer on the time scale of 378 ± 15 ps, and Density Functional Theory calculations suggest that this transient species is characterized by a triplet spin state and a trans conformation of the two terminal CO ligands. Photolysis in neat THF solution is unable to trap the transient intermediate via solvent-coordination. The excited state transient rearrangement isomer appears to adopt a distorted structure in THF, relative to cyclohexane, evidenced by the observation of an additional bridging-CO stretching band in THF solution. The lifetime of the transient in THF is just slightly shorter at 344 ± 17 ps. The CO-loss product of 1 has been characterized previously and adopts an asymmetric arrangement of the three bridging CO ligands. In neat THF solution, the CO-loss complex is not observed to react with THF on the picosecond timescale, although a previous study on longer timescales observed formation of a THF adduct of the CO-loss complex in dilute alkane/THF solutions. Though the molybdenum congener, [Cp*Mo(CO)2]2, is unstable in solution, decaying on the timescale of a few hours in cyclohexane, TRIR experiments demonstrate that no bridged photoproducts (transient or long-lived) are formed from the Mo complex in cyclohexane solution. </div><div><br></div>

scholarly journals A High-Resolution VUV Spectrometer With Electronic Parallel Spectral Detection

1984 ◽  
Vol 86 ◽  
pp. 265-265
Author(s):  
C.L. Cromer ◽  
J.M. Bridges ◽  
T.B. Lucatorto ◽  
J.R. Roberts
Keyword(s):  
High Resolution ◽  
Grazing Incidence ◽  
Transient Species ◽  
Channel Electron Multiplier ◽  
Time Resolved ◽  
Electron Multiplier ◽  
Continuum Source ◽  
Laboratory Plasmas ◽  
Spectral Detection ◽  
Spectrometer System

We demonstrate a new high resolution grazing incidence spectrometer system for spectroscopic applications in the range 50 to 400 Å. The instrument is comprised of a laser-plasma VUV continuum source, a 1.5 m grazing incidence spectrometer, and a 1024-channel VUV optical multichannel analyzer (VUV-OMA). The VUV-OMA is of new design, featuring a special resolution-enhanced channel electron multiplier array in an overall configuration chosen to optimize the spatial resolution of the detector while maintaining single-photoelectron sensitivity. The instrument has the capability of bringing the advantages of linear response and parallel spectral detection to general VUV photoabsorption studies of atoms, ions, molecules, and thin solid samples, as well as studies involving laboratory plasmas. The instrument has the additional special capability of performing time resolved absorption spectroscopy of transient species. The characteristics of the source and detector, along with various applications of the instrument to atomic physics will be discussed.

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