Search Results - "Jordan, J. T."
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An assessment of the tropospherically accessible photo-initiated ground state chemistry of organic carbonyls
Published in Atmospheric chemistry and physics (20-01-2022)“…Carbonyls are among the most abundant volatile organic compounds in the atmosphere. They are central to atmospheric photochemistry as absorption of near-UV…”
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Infrared Spectra of Gas-Phase 1- and 2‑Propenol Isomers
Published in The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory (18-05-2017)“…Fourier transform infrared spectra of isolated 1-propenol and 2-propenol in the gas-phase have been collected in the range of 900–3800 cm–1, and the absolute…”
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Photo-Tautomerization of Acetaldehyde to Vinyl Alcohol: A Potential Route to Tropospheric Acids
Published in Science (American Association for the Advancement of Science) (07-09-2012)“…Current atmospheric models underestimate the production of organic acids in the troposphere. We report a detailed kinetic model of the photochemistry of…”
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Experimental and Theoretical Investigation of Triple Fragmentation in the Photodissociation Dynamics of H2CO
Published in The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory (21-11-2013)“…The photodissociation dynamics of H2CO molecules at energies bracketing the triple fragmentation threshold were investigated using velocity map ion imaging of…”
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Photo-tautomerization of acetaldehyde as a photochemical source of formic acid in the troposphere
Published in Nature communications (03-07-2018)“…Organic acids play a key role in the troposphere, contributing to atmospheric aqueous-phase chemistry, aerosol formation, and precipitation acidity…”
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A Phase Space Theory for Roaming Reactions
Published in The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory (15-08-2013)“…We describe a new, simple theory for predicting the branching fraction of products in roaming reactions, compared to the analogous barrierless bond…”
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Structural Effects on the Norrish Type I α‑Bond Cleavage of Tropospherically Important Carbonyls
Published in The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory (05-12-2019)“…Norrish Type I (NTI) α-bond cleavage is the dominant photolysis mechanism in small carbonyls and is an important source of radicals in the troposphere. In…”
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Photophysical oxidation of HCHO produces HO2 radicals
Published in Nature chemistry (01-10-2023)“…Formaldehyde, HCHO, is the highest-volume carbonyl in the atmosphere. It absorbs sunlight at wavelengths shorter than 330 nm and photolyses to form H and HCO…”
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Roaming is the dominant mechanism for molecular products in acetaldehyde photodissociation
Published in Proceedings of the National Academy of Sciences - PNAS (02-09-2008)“…Reaction pathways that bypass the conventional saddle-point transition state (TS) are of considerable interest and importance. An example of such a pathway,…”
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Oxo-bridged isomers of aza-trishomocubane sigma (σ) receptor ligands: Synthesis, in vitro binding, and molecular modeling
Published in Bioorganic & medicinal chemistry letters (2010)“…The in vitro σ receptor affinity of aza-trishomocubyl hemiaminals, and their isomeric oxo-bridged analogues, is rationalized using molecular modeling. Isomeric…”
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Roaming Reaction Pathways Along Excited States
Published in Science (American Association for the Advancement of Science) (02-03-2012)“…The photodissociation of NO 3 into NO and O 2 , an important atmospheric reaction, has no transition state but proceeds via an O atom roaming around the NO 2…”
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On the Extent of Intramolecular Hydrogen Bonding in Gas-Phase and Hydrated 1,2-Ethanediol
Published in The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory (31-03-2005)“…We investigate the quantum dynamical nature of hydrogen bonding in 1,2-ethanediol and monohydrated 1,2-ethanediol using different levels of ab initio theory…”
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13
The early Holocene sea level rise
Published in Quaternary science reviews (01-07-2011)“…The causes, anatomy and consequences of the early Holocene sea level rise (EHSLR) are reviewed. The rise, of ca 60m, took place over most of the Earth as the…”
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Phototautomerization of Acetaldehyde to Vinyl Alcohol: A Primary Process in UV-Irradiated Acetaldehyde from 295 to 335 nm
Published in The journal of physical chemistry letters (06-12-2012)“…The concentrations of organic acids, key species in the formation of secondary organic aerosols, are underestimated by atmospheric chemistry models by a factor…”
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Sea level rise and submarine mass failures on open continental margins
Published in Quaternary science reviews (15-12-2013)“…Submarine mass failures (which include submarine slides or submarine landslides) occur widely on open continental margins. Understanding their cause is of…”
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The design and performance characteristics of a multileaf collimator
Published in Physics in medicine & biology (01-02-1994)“…A multileaf collimator, which has been in routine clinical use for both conventional and conformal radiotherapy for over four years, is described in detail…”
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H2 Adsorption in a Porous Crystal: Accurate First-Principles Quantum Simulation
Published in The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory (17-12-2015)“…A general method is presented for constructing, from ab initio quantum chemistry calculations, the potential energy surface (PES) for H2 absorbed in a porous…”
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Synthesis and Conformational Analysis of α,β-Difluoro-γ-amino Acid Derivatives
Published in Chemistry : a European journal (18-02-2011)“…Shape control: Synthetic access has been achieved to all possible stereoisomers of the α,β‐difluoro‐γ‐amino acid motif. These novel building blocks can readily…”
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Modeling molecular response in uniform and non-uniform electric fields
Published in The Journal of chemical physics (07-02-2013)“…The response of a molecule to an electric field E, often a model of environment, can be expressed in terms of a sum of power series expansions. We investigate…”
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CH5 +: Chemistry's Chameleon Unmasked
Published in Journal of the American Chemical Society (06-04-2005)“…The nuclear vibrational wave function and zero-point vibrational energy of CH5 + are calculated using quantum diffusion Monte Carlo techniques on an…”
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