Scholars@Duke publication: The application of time-resolved step-scan FT-IR to the photodynamics of transition metal complexes and heme proteins

The application of time-resolved step-scan FT-IR to the photodynamics of transition metal complexes and heme proteins

Publication , Journal Article

Palmer, RA; Plunkett, SE; Dyer, RB; Schoonover, JS; Meyer, TJ; Chao, JL

Published in: Proceedings of SPIE - The International Society for Optical Engineering

January 31, 1994

Time-resolved step-scan FT-IR spectroscopy is used to monitor two distinct photo-induced processes. In the first, the third harmonic of a pulsed Nd: Y AG laser (355 nm) is used to initiate a metal-to-ligand charge transfer process (MLCT) in a number of Ru(II) and/or Re(I) polypyridyl complexes. Changes in the position and shape of the vibrational signatures of rc-backbonding ligands such as CO and/or CN provide information about the changes in oxidation state of the metal resulting from electronic excitation. Changes in the other ligands vibrational bands indicate which is the electron acceptor (radical anion). In the second example demonstrated here, the second harmonic of the Nd:YAG laser (532 nm) pumps into the β-Visible band of carbonmonoxymyoglobin (MbCO). This dissociates the Fe-CO bond of the heme prosthetic group, and the recombination process is observed as indicated by changes in the amide bands of the polypeptide chain. In both cases, these are some of the very few examples of fast (sub-μs) TR FT-IR in the absorbance mode.

Duke Scholars

Author Richard A. Palmer Chemistry

Published In

Proceedings of SPIE - The International Society for Optical Engineering

DOI

10.1117/12.166682

EISSN

1996-756X

ISSN

0277-786X

Publication Date

January 31, 1994

Volume

2089

Start / End Page

488 / 489

Related Subject Headings

5102 Atomic, molecular and optical physics
4009 Electronics, sensors and digital hardware
4006 Communications engineering

Citation

APA

Chicago

ICMJE

MLA

NLM

Palmer, R. A., Plunkett, S. E., Dyer, R. B., Schoonover, J. S., Meyer, T. J., & Chao, J. L. (1994). The application of time-resolved step-scan FT-IR to the photodynamics of transition metal complexes and heme proteins. Proceedings of SPIE - The International Society for Optical Engineering, 2089, 488–489. https://doi.org/10.1117/12.166682

Palmer, R. A., S. E. Plunkett, R. B. Dyer, J. S. Schoonover, T. J. Meyer, and J. L. Chao. “The application of time-resolved step-scan FT-IR to the photodynamics of transition metal complexes and heme proteins.” Proceedings of SPIE - The International Society for Optical Engineering 2089 (January 31, 1994): 488–89. https://doi.org/10.1117/12.166682.

Palmer RA, Plunkett SE, Dyer RB, Schoonover JS, Meyer TJ, Chao JL. The application of time-resolved step-scan FT-IR to the photodynamics of transition metal complexes and heme proteins. Proceedings of SPIE - The International Society for Optical Engineering. 1994 Jan 31;2089:488–9.

Palmer, R. A., et al. “The application of time-resolved step-scan FT-IR to the photodynamics of transition metal complexes and heme proteins.” Proceedings of SPIE - The International Society for Optical Engineering, vol. 2089, Jan. 1994, pp. 488–89. Scopus, doi:10.1117/12.166682.

Published In

Proceedings of SPIE - The International Society for Optical Engineering

DOI

10.1117/12.166682

EISSN

1996-756X

ISSN

0277-786X

Publication Date

January 31, 1994

Volume

2089

Start / End Page

488 / 489

Related Subject Headings

5102 Atomic, molecular and optical physics
4009 Electronics, sensors and digital hardware
4006 Communications engineering