研究领域

Chemicaimagin ;Masspectrometr ;Metacluster ;Nanomaterials

Mass spectrometry has critical applications in a wide variety of diverse scientific disciplines. It is the analytical engine that powers proteomics, drug discovery, and environmental assessment, to name a few. Our interests are focused on several unique and challenging areas using a variety of mass spectrometry techniques. At the forefront is research with the Bruker Ultraflextreme matrix assisted laser desorption ionization (MALDI) time-of-flight mass spectrometer which was acquired through a NSF-MRI grant. The research has as its focus developing new MALDI based techniques to advance the coverage and diversity of materials that are accessible to analysis by MALDI. We are developing new MALDI based methods to enable the acquisition of a more complete analytical picture of monolayer protected nanoparticles at various stages of synthesis to give researchers timely information regarding their synthesizes with Chemistry and Physics faculty. The results from the work will impact chemistry, physics, material science and biology. The group is also involved in collaborative projects utilizing the MALDI TOF/TOF with a number of Biology faculty members for imaging Alzheimer's brain tissue, imaging fire ant tissue (clubs), and imaging and analyzing retinal tissue. We are also continuing our investigations into the aqueous chemistry of transition metal complexes (cis-platin derivatives) and developing analytical methods for small molecules of medical interest (anti-inflammatory and anti-oxidant).

近期论文

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William Seals; Hadi Arman; Stephan B.H. Bach; Ghezai T. Musie Synthesis, characterization and reactivity of a novel Di-nickel complex towards carbon dioxide Inorganic Chemistry Communications. 2014;44:177-179. 0 David M. Black; Nabraj Bhattarai; Robert L. Whetten; Stephan B. H. Bach Collision-induced dissociation of monolayer protected clusters Au144 and Au130 in an electrospray time-of-flight mass spectrometer Journal of Physical Chemistry A. 2014;118(45):10679-10687. 0 Daniel Bahena; Nabraj Bhattarai; Ulises Santiago; Alfredo Tlahuice; Arturo Ponce; Stephan B.H. Bach; Bokwon Yoon; Robert L. Whetten; Uzi Landman; Miguel Jose-Yacaman STEM electron diffraction and high-resolution images used in the determination of the crystal structure of the Au144(SR)60 cluster Journal of Physical Chemistry Letters. 2013;4(6):975-981. 24 Alfredo Tlahuice-Flores; David M. Black; Stephan B. H. Bach; Miguel Jose-Yacamán; Robert L. Whetten Structure & bonding of the gold-subhalide cluster I-Au 144Cl60[z] Physical Chemistry Chemical Physics. 2013;15(44):19191-19195. 6 Alfredo Tlahuice-Flores; Ulises Santiago; Daniel Bahena; Ekaterina Vinogradova; Cecil V. Conroy; Tarushee Ahuja; Stephan B. H. Bach; Arturo Ponce; Gangli Wang; Miguel José-Yacamán; et al. Structure of the thiolated Au130 cluster Journal of Physical Chemistry A. 2013;117(40):10470-10476. 8 Conor P. Mullens; Sreenivasa R. Anugu; Waldemar Gorski; Stephan B.H. Bach Modified silica-containing matrices towards the MALDI-TOF-MS detection of small molecules International Journal of Mass Spectrometry. 2011;308(2-3):311-315. 4 Syam S. Andra; Rupali Datta; Dibyendu Sarkar; Konstantinos C. Makris; Conor P. Mullens; Shivendra V. Sahi; Stephan B.H. Bach Synthesis of phytochelatins in vetiver grass upon lead exposure in the presence of phosphorus Plant and Soil. 2010;326(1):171-185. 16 Syam S. Andra; Konstantinos C. Makris; Shahida Quazi; Dibyendu Sarkar; Rupali Datta; Stephan B. H. Bach Organocopper complexes during roxarsone degradation in wastewater lagoons Environmental Science and Pollution Research. 2010;17(5):1167-1173. 10 Konstantinos C. Makris; Syam S. Andra; Michael Hardy; Dibyendu Sarkar; Rupali Datta; Stephan B.H. Bach; Conor P. Mullens Nitrous oxide supersaturation at the liquid/air interface of animal waste Environmental Pollution. 2009;157(12):3508-3513. 0 Konstantinos C. Makris; Dibyendu Sarkar; Syam S. Andra; Stephan B.H. Bach; Rupali Datta Do lagoons near concentrated animal feeding operations promote nitrous oxide supersaturation? Environmental Pollution. 2009;157(6):1957-1960. 4 Syam S. Andra; Rupali Datta; Dibyendu Sarkar; Sumathi K.M. Saminathan; Conor P. Mullens; Stephan B.H. Bach Analysis of phytochelatin complexes in the lead tolerant vetiver grass [Vetiveria zizanioides (L.)] using liquid chromatography and mass spectrometry Environmental Pollution. 2009;157(7):2173-2183. 24 Akihiko Yoshikawa; Stephan B.H. Bach; Grant N. Merrill An Experimental and Theoretical Investigation into the Hydrolysis of Dichloro(Ethylenediamine)Platinum(II) Via Electrospray Mass Spectrometry and Density Functional Theory Journal of the American Society for Mass Spectrometry. 2009;20(6):1015-1029. 2 Syam S. Andra; Rupali Datta; Dibyendu Sarkar; Konstantinos C. Makris; Conor P. Mullens; Shivendra V. Sahi; Stephan B. H. Bach Induction of lead-binding phytochelatins in vetiver grass [Vetiveria zizanioides (L.)] Journal of Environmental Quality. 2009;38(3):868-877. 19 Konstantinos C. Makris; Jason Salazar; Shahida Quazi; Syam S. Andra; Dibyendu Sarkar; Stephan B. H. Bach; Rupali Datta Controlling the fate of roxarsone and inorganic arsenic in poultry litter Journal of Environmental Quality. 2008;37(3):963-971. 20 Stephan B.H. Bach; Cassandra E. Green; Linda I. Nagore; Tiffanee G. Sepeda; Grant N. Merrill Complexes of Dichloro(Ethylenediamine)Palladium(II) Observed from Aqueous Solutions by Electrospray Mass Spectrometry Journal of the American Society for Mass Spectrometry. 2007;18(4):769-777. 7 Stephan B. H. Bach; Tiffanee G. Sepeda; Grant N. Merrill; Judith A. Walmsley Complexes of dibromo(ethylenediamine)- palladium(II) observed from aqueous solutions by electrospray mass spectrometry Journal of the American Society for Mass Spectrometry. 2005;16(9):1461-1469. 12 Vergel B. Casunuran; Stephan B.H. Bach; Dibyendu Sarkar Rapid analysis of organophosphorus pesticides in soils Environmental Geosciences. 2003;10(4):139-150. 0 Earle G. Stone; Stephan B. H. Bach A pneumatically powered mechanical translator-rotator for the direct laser vaporization of solid materials Review of Scientific Instruments. 1997;68(3):1547-1552. 0 John F. Canty; Earle G. Stone; Stephan B. H. Bach; David W. Ball Matrix isolation and theoretical studies of ONNO: Assignment of a new combination band and density functional calculations Chemical Physics. 1997;216(1-2):81-89. 25 Stephan B.H. Bach; Stephen W. McElvany; Ngai M. Wong; Denise C. Parent Production of aluminum clusters by direct laser vaporization of aluminum nitride Chemical Physics Letters. 1993;209(1-2):57-62.