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Study of poly(phenylene ethynylene)s, dendritic quenchers, and molecular beacons towards the application of a poly(phenylene ethynylene)-based biosensor
(Massachusetts Institute of Technology, 2007)
Poly(para-phenylene ethynylene)s (PPE)s are highly emissive conjugated polymers that are easily quenched by target analytes. As a result, they have been increasingly incorporated into sensing platforms, both as chemosensors ...
Early transitional metal alkyl, alkylidene, and alkylidyne chemistry
(Massachusetts Institute of Technology, 2007)
CHAPTER 1. Zirconium and hafnium complexes of several new unsymmetric diamide ligands have been prepared and their proficiency in olefin polymerization reactions evaluated. The first set of supporting ligands examined are ...
Proton-coupled electron transfer : from basic principles to small molecule activation
(Massachusetts Institute of Technology, 2007)
Proton-coupled electron transfer (PCET) is the basic mechanism for bioenergetic conversion. Hallmark examples of such reactivities include water oxidation which is coupled to photosynthesis and oxygen reduction which is ...
Distal hydrogen-bonding effects and cofacial bimetallic salen architectures for oxygen activation chemistry
(Massachusetts Institute of Technology, 2007)
Two distinct structural scaffolds elaborated from Schiff-base macrocycles were designed to study the proton-coupled electron transfer chemistry of 0-0 bond forming and activation chemistry. The "Hangman" architecture is ...
Photodetectors based on colloidal quantum dots
(Massachusetts Institute of Technology, 2007)
Inspired by recent work demonstrating photocurrent enhancement in quantum-dot (QD) solids via post-deposition chemical annealing and by recent successes incorporating single monolayers of QDs in light-emitting devices ...
Phosphine-promoted cross-coupling reactions of propargylcopper reagents and alkenyl iodides and the total synthesis of (-)-gloeosporone via nickel-catalyzed epoxide-alkyne reductive macrocyclization
(Massachusetts Institute of Technology, 2007)
I. Phosphine-Promoted Cross-Coupling Reactions of Propargylcopper Alkenyl Iodides Reagents and Alkenyl Iodides. An electron-rich phosphine additive is critical and sufficient for propargyl-selective couplings of propargylcopper ...
Dynamic nuclear polarization in biomolecular solid state NMR : methods and applications in peptides and membrane proteins
(Massachusetts Institute of Technology, 2007)
Solid state NMR can probe structure and dynamics on length scales from the atomic to the supramolecular. However, low sensitivity limits its application in macromolecules. NMR sensitivity can be improved by dynamic nuclear ...
Exploring and enhancing conductivity in semiconductor nanoparticle films
(Massachusetts Institute of Technology, 2007)
Semiconductor nanocrystals (NCs) are a promising material for use in opto-electronic devices as their optical properties tune with particle size. NCs formed via colloidal synthesis are suspended in solution by the organic ...
Organic materials with acenoid and iptycene structures
(Massachusetts Institute of Technology, 2007)
Chapter 1. The synthesis of a group of alkoxy-substituted para-acenequinones and their photophysical properties in solution and liquid crystal are reported. Polarized absorption and fluorescence measurements demonstrate ...
Microfluidic reactors for the synthesis of nanocrystals
(Massachusetts Institute of Technology, 2007)
Several microfluidic reactors were designed and applied to the synthesis of colloidal semiconductor nanocrystals (NCs). Initially, a simple single-phase capillary reactor was used for the synthesis of CdSe NCs. Precursors ...