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

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.

Application of Time-Resolved Infrared Spectroscopy to Electronic Structure in Metal-to-Ligand Charge-Transfer Excited States

2002 ◽  
Vol 41 (23) ◽  
pp. 6071-6079 ◽  
Author(s):  
Dana M. Dattelbaum ◽  
Kristin M. Omberg ◽  
Jon R. Schoonover ◽  
Richard L. Martin ◽  
Thomas J. Meyer
Keyword(s):  
Electronic Structure ◽  
Infrared Spectroscopy ◽  
Charge Transfer ◽  
Excited States ◽  
Time Resolved ◽  
Ligand Charge Transfer ◽  
Time Resolved Infrared Spectroscopy

scholarly journals Direct observation by time-resolved infrared spectroscopy of the bright and the dark excited states of the [Ru(phen)2(dppz)]2+ light-switch compound in solution and when bound to DNA

2016 ◽  
Vol 7 (5) ◽  
pp. 3075-3084 ◽  
Author(s):  
Fergus E. Poynton ◽  
James P. Hall ◽  
Páraic M. Keane ◽  
Christine Schwarz ◽  
Igor V. Sazanovich ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Excited States ◽  
Direct Observation ◽  
Time Resolved ◽  
Time Resolved Infrared Spectroscopy

Strikingly different TRIR spectra are recorded for the complex in D2O or CD3CN or when DNA-bound.

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