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Showing 1 to 20 of 88 for “"Unimolecular"”.
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Picosecond Studies of Unimolecular Reactions
Several photochemical reactions occur on a very fast timescale. These ultrafast reactions may best be studied by the use of picosecond spectroscopy. These studies require advanced instrumental and data acquisition techniques. The construction of an apparatus which allows resolution of events on the …
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Statistical Mechanics of Unimolecular Decompositions
Made available in DSpace on 2014-12-09T17:34:59Z (GMT). No. of bitstreams: 1 6500857.pdf: 1756049 bytes, checksum: 274050e9dba5c26a469a8a08b9fe9023 (MD5) Previous issue date: 1964
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Spectroscopic patterns encode unimolecular dynamics
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1999.
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Unimolecular decomposition kinetics at resolved internal energies.
The kinetic behavior of microcanonical unimolecular decomposition reactions involving clusters formed by the electrostatic interaction between transition metal cations and simple organic molecules has been measured at multiple internal energies. The presence of the metal lowers the energy necessary …
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Homodyne High-harmonic Spectroscopy: Coherent Imaging of a Unimolecular Chemical Reaction
At the heart of high harmonic generation lies a combination of optical and collision physics entwined by a strong laser field. An electron, initially tunnel-ionized by the field, driven away then back in the continuum, finally recombines back to rest in its initial ground state via a radiative …
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Flow-IEG enables programmable thermodynamic properties in sequence-defined unimolecular macromolecules
Flow-IEG has emerged as a powerful platform for the production of sequence-defined macromolecules and has demonstrated the utility of adapting continuous-flow methodologies to the production of materials for structure/function analysis. Our Flow-IEG system has been expanded to include both the …
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Applications Of Electronic Structure Theory To Problems In Unimolecular Dissociation And Inorganic And Biochemical Systems
<p>In this dissertation, ab initio classical trajectory calculations have been carried out to study the dissociation of acetone radical cation, pentane-2,4-dione radical cation, and 1,3-cyclobutanedione radical cation. For acetone radical cation and pentane-2,4-dione radical cation, MP2 with bond …
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Synthesis and process optimization of colloidal unimolecular polymer, cup, particle formation, and its interfacial surface tension behavior
<p>"Colloidal Unimolecular Polymer (CUP) particles are 3-9 nm size single-chain polymer nanoparticles that are made from amphiphilic acrylic co-polymers using the process of water reduction. The formation of CUP particles was driven by the polymer-polymer interactions being greater than …
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Chelating compounds as potential flash rust inhibitors and melamine & aziridine cure of acrylic colloidal unimolecular polymers (CUPs)
… and solvent stripped to produce Colloidal Unimolecular Polymers (CUPs). These particles are typically 3-9 nanometers in diameter depending upon the molecular weight. They were then formulated into a clear coating with either a melamine (bake) or an aziridine (ambient cure) and then cured. …
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G4-RESOLVASE 1 TIGHTLY BINDS AND CATALYTICALLY UNWINDS UNIMOLECULAR G-QUADRUPLEX STRUCTURES WITH IMPLICATIONS FOR GENE TRANSCRIPTION AND TELOMERE BIOLOGY
… show that G4R1 specifically binds to a parallel, unimolecular G4-DNA with remarkable affinity, with Kd values in the low pM range; the tightest reported binding affinity for any known G4-binding protein. Using a novel peptide nucleic acid (PNA) trap assay, we show that G4R1 catalyzes unwinding of …
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The synthesis of unimolecular polymers through iterative exponential growth and their applications in block copolymer phase segregation and biological systems
… the scalable synthesis of sequence-defined, unimolecular, chiral polymers. Using this strategy, we have created a wide array of functional molecularly precise polymers of up to 12.1k kDa in molar mass with various side chains for applications in block copolymer phase segregation, lectin …
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Thermochemical properties of fluorinated hydrocarbons, hydroperoxides, and fluorinated hydroperoxides; thermochemistry and kinetics on dissociation and association reactions of oxiranyl radical
… methods, and basis sets. Kinetic parameters for unimolecular decomposition and isomerization reactions of the oxiranyl radical are determined versus pressure and temperature. Kinetic parameters for chemically activated bimolecular oxidation reaction of the oxiranyl radical with 3O2 are determined …
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The use of chirped pulse millimeter-wave spectroscopy in chemical dynamics and kinetics
… spectroscopy is also a valuable tool in studying unimolecular and bimolecular reactions. We have studied the unimolecular decomposition of deuterated methyl nitrite which produces DNO products and bimolecular hydrogen abstraction reaction of NO with acetaldehyde resulting in HNO products. These …
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Chemiluminescence of Dimethyldioxetanone
… generate electronically excited states. The unimolecular decomposition at 30.0(DEGREES)C produces excited singlet and triplet acetone, with efficiencies of 0.1 and 1.5% respectively. The composite activation energy for formation of singlet acetone is 3-4 kcal/mol greater than the activation …
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Construction and calibration of a custom time-of-flight mass spectrometer and its use in measuring the reaction kinetics of transition metal ion-organic interactions.
… Additionally, the time dependence of the gaseous unimolecular decomposition of the jet-cooled adduct ion, Ni⁺•Acetone was monitored by selective detection of the daughter fragment, Ni⁺CO. Various photon energies were supplied to initiate dissociation of the adduction. The energies employed in this …
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Study of the Interplay Among Non -Covalent Interactions in Structural Determination of Gas Phase Cluster Ions
… were also investigated with benzene and water. Unimolecular dissociation rates were used to determine the most labile species and therefore a possible structural change. In the vibrational spectra of Li+(Benzene)n(Water)1--4 clusters, pi-H bonding bands dominated, while water-water hydrogen …
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Synthesis of Organic and Water Soluble Cored Dendrimers With Internal Cross -Links
"Dendrimers also have been shown to behave as unimolecular micelles and nanocontainers. However, the capacity of the dendrimers for guest solubilization is limited. Thus, the generatinn of novel, water soluble dendrimers as potential nanocontainers with larger capacities is desired. It was hoped …
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A stochastic model of component failure mechanisms
The progress of a unimolecular chemical degradation reaction is used in representing a component failure mechanism. The component is said to fail when the concentration of reaction product accumulates beyond an acceptable level. The process of accumulating reaction product is modelled as a Markov …
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