Interfacing a transient digitizer to a step-scan Fourier transform spectrometer for nanosecond time resolved spectroscopy

1999 ◽  
Vol 70 (1) ◽  
pp. 18-22 ◽  
Author(s):  
Laura T. Letendre ◽  
Hai-Lung Dai ◽  
Ian A. McLaren ◽  
Timothy J. Johnson
Keyword(s):  
Fourier Transform ◽  
Fourier Transform Spectrometer ◽  
Time Resolved ◽  
Time Resolved Spectroscopy

Time-Resolved Spectroscopy Using Step-Scan Fourier Transform Interferometry

1989 ◽  
Vol 43 (2) ◽  
pp. 193-195 ◽  
Author(s):  
Richard A. Palmer ◽  
Christopher J. Manning ◽  
Jeffrey A. Rzepiela ◽  
Jeffrey M. Widder ◽  
James L. Chao
Keyword(s):  
Fourier Transform ◽  
Fourier Transform Spectrometer ◽  
Fluorescent Lamp ◽  
Time Resolved ◽  
Transient Phenomena ◽  
Time Resolved Spectroscopy ◽  
Infrared Measurements

The capabilities of a step-scan Fourier transform spectrometer of obtaining time-resolved spectra are reported. As a demonstration of the method, time-resolved spectra from a pulsed fluorescent lamp are presented. The potential of step-scan interferometry for time-resolved infrared measurements of a variety of transient phenomena is discussed.

scholarly journals Step-Scan Fourier Transform Infrared Absorption Difference Time-Resolved Spectroscopy Studies of Excited State Decay Kinetics and Electronic Structure of Low-Spin d6 Transition Metal Polypyridine Complexes With 10 Nanosecond Time Resolution

1999 ◽  
Vol 19 (1-4) ◽  
pp. 291-298 ◽  
Author(s):  
Gregory D. Smith ◽  
Pingyun Chen ◽  
James L. Chao ◽  
Kristin M. Omberg ◽  
Darius A. Kavaliunas ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Fourier Transform ◽  
Excited State ◽  
Transition Metal ◽  
Time Resolution ◽  
Decay Kinetics ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Vibrational Bands ◽  
Difference Time

Step-scan Fourier transform absorption difference time-resolved spectroscopy (S2FTIR ∆A TRS) has been used to collect mid-IR time-resolved infrared spectra of the transient electronic excited states of polypyridine transition metal complexes with 10 ns time resolution. The time-resolved data can be used for kinetic analysis or to generate “snapshots” of the lowest lying excited state. Shifts of vibrational bands in the excited state relative to the ground state can be used to infer significant details of the electronic structure of the excited state. The multiplex advantage of the FTIR technique allows a wide variety of vibrational bands to be analyzed for this purpose. In the example illustrated, the shift of the ester ν(CO) band in {Ru(bpy)[4,4′-(COOEt)2bpy]2}2+ compared to those in related complexes has been used to address the question of electron delocalization in the excited state.

Applications of Time-Resolved Step-Scan and Rapid-Scan FT-IR Spectroscopy: Dynamics from Ten Seconds to Ten Nanoseconds

1993 ◽  
Vol 47 (9) ◽  
pp. 1376-1381 ◽  
Author(s):  
T. J. Johnson ◽  
A. Simon ◽  
J. M. Weil ◽  
G. W. Harris
Keyword(s):  
Fourier Transform ◽  
Ir Spectroscopy ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Rapid Scan ◽  
Scan Time ◽  
Ft Ir ◽  
Complementary Nature ◽  
New Applications ◽  
Ft Ir Spectroscopy

The step-scan technique in Fourier transform infrared (FT-IR) spectroscopy is employed in new applications of time resolved spectroscopy (TRS). Results are demonstrated on time-resolved laser emissions and photolytically generated chemical reactions using both emission and absorption modes. New achievements in FT-IR temporal resolution are demonstrated, as well as the complementary nature of step-scan and rapid-scan time-resolved spectroscopy.

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