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Physical Sciences and Mathematics Commons™
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Full-Text Articles in Physical Sciences and Mathematics
Kondo Resonances And Anomalous Gate Dependence In The Electrical Conductivity Of Single-Molecule Transistors, L H. Yu, Z K. Keane, Jacob W. Ciszek, L Cheng, J M. Tour, T Baruah, M R. Pederson, D Natelson
Kondo Resonances And Anomalous Gate Dependence In The Electrical Conductivity Of Single-Molecule Transistors, L H. Yu, Z K. Keane, Jacob W. Ciszek, L Cheng, J M. Tour, T Baruah, M R. Pederson, D Natelson
Chemistry: Faculty Publications and Other Works
We report Kondo resonances in the conduction of single-molecule transistors based on transition metal coordination complexes. We find Kondo temperatures in excess of 50 K, comparable to those in purely metallic systems. The observed gate dependence of the Kondo temperature is inconsistent with observations in semiconductor quantum dots and a simple single-dot-level model. We discuss possible explanations of this effect, in light of electronic structure calculations.
Synthesis And Structure-Activity Relationships Of Ss- And A-Piperidine Sulphone Hydroxamic Acid Matrix Metalloproteinase Inhibitors With Oral Antitumor Efficacy, Daniel Becker, Clara I. Villamil, Thomas E. Barta, Louis J. Bedell
Synthesis And Structure-Activity Relationships Of Ss- And A-Piperidine Sulphone Hydroxamic Acid Matrix Metalloproteinase Inhibitors With Oral Antitumor Efficacy, Daniel Becker, Clara I. Villamil, Thomas E. Barta, Louis J. Bedell
Chemistry: Faculty Publications and Other Works
α-Piperidine-β-sulfone hydroxamate derivatives were explored that are potent for matrix metalloproteinases (MMP)-2, -9, and -13 and are sparing of MMP-1. The investigation of the β-sulfones subsequently led to the discovery of hitherto unknown α-sulfone hydroxamates that are superior to the corresponding β-sulfones in potency for target MMPs, selectivity vs MMP-1, and exposure when dosed orally. α-Piperidine-α-sulfone hydroxamate 35f (SC-276) was advanced through antitumor and antiangiogenesis assays and was selected for development. Compound 35f demonstrates excellent antitumor activity vs MX-1 breast tumor in mice when dosed orally as monotherapy or in combination with paclitaxel.