Actinide and Lanthanide Chemistry

Room Temperature Ionic Liquids

Room temperature ionic liquids form potentially important solvents in novel nuclear waste reprocessing methods. We use infrared, Raman, and NMR spectroscopies to study the solvation, speciation, and complexation behaviors of actinides and lanthanides in these fascinating solvents. Ph.D. student Ruma Joshi is continuing work in this area. The following two papers describe some of our group’s previous work: Pasilis, S. P.*; Blumenfeld, A. Effect of Nitrate, Perchlorate, and Water on Uranyl(VI) Speciation in a Room Temperature Ionic Liquid: A Spectroscopic Investigation. Inorg. Chem. 2011, 50, 8302-8307. Quach, D. L.; Wai, C. M.; Pasilis, S. P.* Characterization of Uranyl(VI) Nitrate Complexes in a Room Temperature Ionic Liquid Using Attenuated Total Reflection- Fourier Transform Infrared Spectrometry. Inorg. Chem. 2010, 49, 8568-8572.

Mass Spectrometry 

The aquatic chemistry of uranium influences important technological, biological, and geochemical processes, including mobility  and fate in the geologic subsurface, bioavailability  and  carcinogenicity,  nuclear  fuel reprocessing,  and  the migration  of  nuclear  wastes. Ph.D. student Adetayo Mustapha is using electrospray ionization mass spectrometry to study uranium complexes formed in aqueous solution. The following paper has recently been published. Mustapha, A. M.; Pasilis, S. P.* Probing Uranyl(VI) Speciation in the Presence of Amidoxime Ligands Using Electrospray Ionization Mass Spectrometry. Rapid Commun. Mass Spectrom. 2013, 27, 2135-2142. Mustapha, A. M.; Pasilis, S. P.* Improved Ionization of Organophosphorus Pesticides through Metal Complex Formation. Rapid Commun. Mass Spectrom. 2013. Submitted. Mustapha, A. M.; Pasilis, S. P.* Probing Uranyl(VI) Speciation in the Presence of Amidoxime Ligands Using Electrospray Ionization Mass Spectrometry. Rapid Commun. Mass Spectrom. 2013, 27, 2135-2142. Stark, T. D.*; Matsumoto, T.; Lösch, S.; Boakye, P. A.; Balemba, O. B.; Pasilis, S. P.; Hofman, T. Isolation and structure elucidation of highly antioxidative 3,8’’-linked biflavanones and flavanon-C-glycosides from Garcinia buchananii bark. J. Agric. Food Chem. 2012, 60, 2053-2062. Boakye, P. A.; Stenkamp-Strahm, C.; Bhattarai, Y; Heckman, M. D.; Brierley, S. M.; Pasilis, S. P.; Balemba, O. B.* 5-HT3 and 5-HT4 Receptors Contribute to the Anti-motility Effects of Garcinia buchananii Bark Extract in the Guinea Pig Distal Colon. Neurogastroenterol. Motil. 2012, 24, e27-e40. Boakye, P. A.; Brierly, S. M.; Pasilis, S. P.; Balemba, O. B.* Garcinia buchananii  bark extract is an effective anti-diarrheal remedy for lactose-induced diarrhea. J. Ethnopharmacology. 2012, 142, 539-547. Pasilis, S. P.*; Blumenfeld, A. Effect of Nitrate, Perchlorate, and Water on Uranyl(VI) Speciation in a Room Temperature Ionic Liquid: A Spectroscopic Investigation. Inorg. Chem. 2011, 50, 8302-8307. Pasilis, S. P.* Desorption Electrospray Ionization Mass Spectrometry. Encyclopedia of Analytical Chemistry. Supplementary Volumes S1-S3. John Wiley & Sons, Ltd: Chichester, 2011. pp 1395-1415. Wai, C. M.*; Liao, Y. J.; Liao W. S.; Tian G. X.; Addleman R. S.; Quach, D.; Pasilis, S. P. Uranium Dioxide in Ionic Liquid with a Tri-n-butylphosphate-HNO3 Complex– Dissolution and Coordination Environment. Dalton Trans. 2011, 40, 5039-5045. Quach, D. L.; Wai, C. M.; Pasilis, S. P.* Characterization of Uranyl(VI) Nitrate Complexes in a Room Temperature Ionic Liquid Using Attenuated Total Reflection- Fourier Transform Infrared Spectrometry. Inorg. Chem. 2010, 49, 8568-8572. Pasilis S. P.*; Van Berkel, G. J.* Atmospheric Pressure Surface Sampling/Ionization Techniques for Direct Coupling of Planar Separations with Mass Spectrometry. J. Chromatogr. A  2010, 1217, 3955–3965. Pasilis S. P.; Van Berkel, G. J.* Modern Atmospheric Pressure Surface Sampling/Ionization Techniques in Mass Spectrometry. Encyclopedia of Spectroscopy and Spectrometry (2nd Ed.) 2010, 1544–1555. Pasilis, S. P.; Kertesz, V.; Van Berkel, G. J.*; Schulz, M.; Schorcht, S. HPTLC DESI-MS Imaging of Tryptic Protein Digests Separated in Two Dimensions. J. Mass Spectrom. 2008, 43, 1627–1635. Van Berkel, G. J.*; Pasilis, S. P.; Ovchinnikova, O. Established and Emerging Atmospheric Pressure Surface Sampling/Ionization Techniques for Mass Spectrometry.  J. Mass Spectrom. 2008, 43, 1161–1180. Pasilis, S. P.; Kertesz, V.; Van Berkel, G. J.*; Schulz, M.; Schorcht, S. Using HPTLC/DESI-MS for Peptide Identification in 1D Separations of Tryptic Protein Digests. Anal. Bioanal. Chem. 2008, 391, 317–324. Pasilis, S. P.; Kertesz, V.; Van Berkel, G. J.* Unexpected Analyte Oxidation During Desorption Electrospray Ionization Mass Spectrometry. Anal. Chem. 2008, 80, 1208–1214. Pasilis, S. P.; Pemberton, J. E.* ATR-FTIR Investigation of Uranyl(VI) and Citrate Coadsorption to Al2O3. Geochim. Cosmochim. Acta 2008, 72, 277–287. Please click here to see a complete list of my publications.

 spasilis@uidaho.edu

208-885-4014 Office: Renfrew 003 University of Idaho Department of Chemistry P.O. Box 442343 Moscow ID 84844-2343
Contact Information

B. S. Chemistry

San Francisco State

University

M. S. Hydrology  University of Arizona Ph. D. Chemistry  University of Arizona Postdoctoral Research Oak Ridge National Laboratory
Education
Research Interests Analytical Chemistry Sofie P. Pasilis University of Idaho Department of Chemistry
Current Research Interests
Selected Publications

Fall 2013

Chem 303/307

Physical Chemistry Lab

Spring 2014

Chem 553

Separation Theory and

Chromatography

Chem 454 Instrumental Analysis
Classes