Ruthenium trisbipyridine as a candidate for gas-phase spectroscopic studies in a Fourier transform mass spectrometerReport as inadecuate

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Spectroscopy - Volume 18 2004, Issue 2, Pages 387-396

Idaho National Engineering and Environmental Laboratory INEEL, Idaho Falls, ID 83415, USA

Department of Chemistry & Biochemistry, University of Arkansas, Fayetteville, AR 72701, USA

INEEL, 2525 N. Fremont Ave., MS 2208, Idaho Falls, ID 83415, USA

Copyright © 2004 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Metal polypyridines are excellent candidates for gas-phase optical experiments where their intrinsic properties can be studied without complications due to the presence of solvent. The fluorescence lifetimes of Rubpy3

trapped in an optical detection cell within a Fourier transform mass spectrometer were obtained using matrix-assisted laser desorption-ionization to generate the ions with either 2,5-dihydroxybenzoic acid DHB or sinapinic acid SA as matrix. All transients acquired, whether using DHB or SA for ion generation, were best described as approximately exponential decays. The rate constant for transients derived using DHB as matrix was 4×10


, while the rate constant using SA was 1×10


. Some suggestions of multiple exponential decay were evident although limited by the quality of the signals. Photodissociation experiments revealed that Rubpy3

generated using DHB can decompose to Rubpy2

, whereas ions generated using SA showed no decomposition. Comparison of the mass spectra with the fluorescence lifetimes illustrates the promise of incorporating optical detection with trapped ion mass spectrometry techniques.

Author: Jill R. Scott, Jason E. Ham, Bill Durham, and Paul L. Tremblay



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