Structure of the Twisted-Intramolecular-Charge-Transfer Excited Singlet and Triplet States of 4-(Dimethylamino)benzonitrile As Studied by Nanosecond Time-Resolved Infrared Spectroscopy

1995 ◽  
Vol 99 (20) ◽  
pp. 7875-7877 ◽  
Author(s):  
Mamoru Hashimoto ◽  
Hiro-o Hamaguchi
Keyword(s):  
Infrared Spectroscopy ◽  
Charge Transfer ◽  
Intramolecular Charge Transfer ◽  
Triplet States ◽  
Excited Singlet ◽  
Time Resolved ◽  
Twisted Intramolecular Charge Transfer ◽  
Singlet And Triplet States ◽  
Time Resolved Infrared Spectroscopy

scholarly journals Excited States and Intermediates by Time-Resolved Infrared Spectroscopy

1999 ◽  
Vol 19 (1-4) ◽  
pp. 245-251 ◽  
Author(s):  
J. J. Turner ◽  
M. W. George ◽  
I. P. Clark ◽  
I. G. Virrels
Keyword(s):  
Infrared Spectroscopy ◽  
Excited State ◽  
Charge Transfer ◽  
Excited States ◽  
Fast Time ◽  
Time Resolved ◽  
Excited Species ◽  
Charge Transfer Transitions ◽  
Time Resolved Infrared Spectroscopy ◽  
Kinetics Of

For coordination compounds containing CO or CN groups, fast time-resolved infrared spectroscopy (TRIR) provides a convenient method of probing excited states and intermediates. TRIR has proved particularly powerful for probing the structure and kinetics of organometallic intermediates. The interpretation is particularly straightforward when combined with IR data from matrix isolation experiments, although there can be some subtle differences. In excited state studies, shifts in ν(CO) and ν(CN) frequencies, from ground to excited state, are sensitive to the changes in electron distribution on excitation, thus allowing the distinction between charge-transfer and non-charge-transfer transitions. Subtle effects on excited state ν(CO) band positions occur with change from fluid to rigid solvent-“infrared rigidochromism”. There is often a change in ν(CO) band width on excitation; this can be interpreted in terms of specific interactions between the excited species and the solvent. This paper presents some of our recent work in this area.

Time-resolved resonance Raman spectroscopy of excited singlet and triplet states of free-base meso-tetraphenylporphyrin

1993 ◽  
Vol 97 (45) ◽  
pp. 11599-11602 ◽  
Author(s):  
Steven E. J. Bell ◽  
Ala H. R. Al-Obaidi ◽  
Martin Hegarty ◽  
Ronald E. Hester ◽  
John J. McGarvey
Keyword(s):  
Raman Spectroscopy ◽  
Resonance Raman Spectroscopy ◽  
Resonance Raman ◽  
Triplet States ◽  
Free Base ◽  
Excited Singlet ◽  
Time Resolved ◽  
Singlet And Triplet States

scholarly journals Tracking DNA Excited States by Picosecond-Time-Resolved Infrared Spectroscopy: Signature Band for a Charge-Transfer Excited State in Stacked Adenine–Thymine Systems

2013 ◽  
Vol 4 (16) ◽  
pp. 2739-2744 ◽  
Author(s):  
Gerard W. Doorley ◽  
Michal Wojdyla ◽  
Graeme W. Watson ◽  
Michael Towrie ◽  
Anthony W. Parker ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Excited State ◽  
Charge Transfer ◽  
Excited States ◽  
Time Resolved ◽  
A Charge ◽  
Time Resolved Infrared Spectroscopy ◽  
Adenine Thymine
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