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Nonlinear terahertz spectroscopy of electronic and vibrational responses in condensed matter systems
(Massachusetts Institute of Technology, 2012)
In this work, I describe experiments utilizing high-field terahertz (THz) pulses to initiate nonlinear responses in several classes of materials. We have developed several methods for interrogating the nonlinear THz response ...
THz polaritonics : optical THz generation, detection, and control on a chip
(Massachusetts Institute of Technology, 2012)
The THz polaritonics system is an on-chip platform for THz generation, detection, and control. THz-frequency electromagnetic waves are generated directly in a thin slab of lithium niobate crystal where they can be amplified ...
Niobium-mediated synthesis of phosphorus-rich molecules
(Massachusetts Institute of Technology, 2010)
The use of a sterically demanding enolate ligand -OC[2Ad]Mes supported by niobium has allowed for the synthesis of (Mes[2Ad]CO) 3Nb=PP7Nb(OC [2Ad]Mes)3 through P4 coupling by a low-valent niobium intermediate. This asymmetric ...
Photoinduced phase transitions studied by femtosecond single-shot spectroscopy
(Massachusetts Institute of Technology, 2010)
Single-shot femtosecond spectroscopy has been developed and employed for the study of phase transitions of solid-state materials. Using two crossed echelons, a two dimensional spatial delay gradient was generated across a ...
Nickel-catalyzed preparation of acrylamides from alpha olefins and isocyanates ; Synthetic studies toward ripostatin A
(Massachusetts Institute of Technology, 2010)
Chapter I. In the presence of the N-heterocyclic carbene ligand IPr, the nickel(0)-catalyzed coupling reaction of a-olefins and branched aliphatic isocyanates provides c,-unsaturated amides arising from preferential C-C ...
Optical transient grating measurements of micro/nanoscale thermal transport and mechanical properties
(Massachusetts Institute of Technology, 2015)
The laser-based transient grating technique was used to study phonon mediated thermal transport in bulk and nanostructured semiconductors and surface wave propagation in a monolayer of micron sized spheres. In the transient ...
Bioinorganic Chemistry of the Human Host-Defense Protein Calprotectin
(Massachusetts Institute of Technology, 2015)
The human innate immune system responds to bacterial and fungal pathogens by releasing the metal-chelating protein calprotectin (CP) at sites of infection and in the upper layers of the epidermis. CP is a Mn(II)- and ...
An analysis of exciton transport, electron tunneling, and electromigration in nanotube and nanowire systems
(Massachusetts Institute of Technology, 2016)
Herein three systems - electromigration in metal nanowires, electron tunneling in single-molecules, and carbon nanotube photovoltaics - are investigated. In the first area, electromigrative failure of metal nanowires has ...
Advances in non-heme diiron modeling chemistry : developing functional protein mimics through ligand design and understanding dioxygen activation
(Massachusetts Institute of Technology, 2011)
Chapter 1 A comprehensive review of diiron modeling in the Lippard group over the past thirty years is presented. This account describes the different strategies employed to prepare biomimetic complexes of non-heme diiron ...
Stereoselective monoalkyl diazene synthesis for mild reductive transformations : direct synthesis of densely substituted pyridines and pyrimidines
(Massachusetts Institute of Technology, 2011)
I. N-Isopropylidene-N'-2-Nitrobenzenesulfonyl Hydrazine. A Reagent for Reduction of Alcohols via the Corresponding Monoalkyl Diazenes The development of a new reagent N-isopropylidene-N'-2-nitrobenzenesulfonyl hydrazine ...