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Physical Sciences and Mathematics Commons

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Full-Text Articles in Physical Sciences and Mathematics

Generation And Reactions Of A Benzodehydrotropylium Ion-Co2(Co)6 Complex, Mariam A. Mehdi, Eric A.C. Bushnell, Sahar Nikoo, James W. Gauld, James R. Green Oct 2019

Generation And Reactions Of A Benzodehydrotropylium Ion-Co2(Co)6 Complex, Mariam A. Mehdi, Eric A.C. Bushnell, Sahar Nikoo, James W. Gauld, James R. Green

Chemistry and Biochemistry Publications

A series of 7-methylenedehydrobenzo[7]annulen-5-ol hexacarbonyldicobalt complexes were generated by Hosomi-Sakurai reactions of allylsilanes containing o-alkynylarylaldehyde-Co2(CO)6 complexes. One of cyclization products was converted into its corresponding dihydrobenzo[7]annulen-7-ol hexacarbonyldicobalt complex, an immediate precursor to a benzodehydrotropylium-Co2(CO)6. The cation was generated in situ and reacted with four nucleophiles, and its aromatic stabilization determined by computational methods.


Collaborative Learning Exercises For Teaching Protein Mass Spectrometry [Post-Print], Michelle Kovarik, Jill K. Robinson Mar 2019

Collaborative Learning Exercises For Teaching Protein Mass Spectrometry [Post-Print], Michelle Kovarik, Jill K. Robinson

Faculty Scholarship

A collaborative learning module for teaching protein mass spectrometry has been developed to overcome common obstacles to incorporating the modern topic of biological mass spectrometry into the undergraduate chemistry curriculum. Protein mass spectrometry data is provided to eliminate the need for expensive instrumentation, and an instructor’s manual gives necessary details for those unfamiliar with the topic. The first section provides background information on proteins and the field of proteomics. The second section describes the use of electrospray ionization to determine the molecular weight of a protein. The third section shows how to identify a protein using peptide mass mapping, and …


Substrate-Dependent Photoconductivity Dynamics In A High-Efficiency Hybrid Perovskite Alloy, Ali Moeed Tirmzi, Jeffrey A. Christians, Ryan P. Dwyer, David T. Moore, John A. Marohn Feb 2019

Substrate-Dependent Photoconductivity Dynamics In A High-Efficiency Hybrid Perovskite Alloy, Ali Moeed Tirmzi, Jeffrey A. Christians, Ryan P. Dwyer, David T. Moore, John A. Marohn

Faculty Publications

Films of (FA0.79MA0.16Cs0.05)0.97Pb(I0.84Br0.16)2.97 were grown over TiO2, SnO2, indium tin oxide (ITO), and NiO. Film conductivity was interrogated by measuring the in-phase and out-of-phase forces acting between the film and a charged microcantilever. We followed the films’ conductivity versus time, frequency, light intensity, and temperature (233−312 K). Perovskite conductivity was high and light-independent over ITO and NiO. Over TiO2 and SnO2, the conductivity was low in the dark,increased with light intensity, and persisted for 10’s of seconds after the light …