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

Journal Article · Thu Jan 01 00:00:00 EST 2004 · Spectroscopy

DOI:https://doi.org/10.1155/2004/457843· OSTI ID:1198005

Scott, Jill R. ^[1]; Ham, Jason E. ^[2]; Durham, Bill ^[2]; Tremblay, Paul L. ^[3]

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1. Idaho National Engineering and Environmental Laboratory (INEEL), Idaho Falls, ID 83415, USA, INEEL, 2525 N. Fremont Ave., MS 2208, Idaho Falls, ID 83415, USA
2. Department of Chemistry & Biochemistry, University of Arkansas, Fayetteville, AR 72701, USA
3. Idaho National Engineering and Environmental Laboratory (INEEL), Idaho Falls, ID 83415, USA

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 [Ru(bpy) ₃ ] ¹⁺ 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 ⁷ s ⁻¹ , while the rate constant using SA was 1×10 ⁷ s ⁻¹ . Some suggestions of multiple exponential decay were evident although limited by the quality of the signals. Photodissociation experiments revealed that [Ru(bpy) ₃ ] ¹⁺ generated using DHB can decompose to [Ru(bpy) ₂ ] ¹⁺ , 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.

• Sponsoring Organization: USDOE
• Grant/Contract Number: AC07-99ID13727
• OSTI ID: 1198005
• Journal Information: Spectroscopy, Journal Name: Spectroscopy Vol. 18 Journal Issue: 2; ISSN 0712-4813
• Publisher: Hindawi Publishing Corporation
• Country of Publication: Country unknown/Code not available
• Language: English