Gordon L. Hug

University of Notre Dame

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Bronisław Marciniak

Adam Mickiewicz University in Poznań

Krzysztof Bobrowski

Instytut Chemii i Techniki Jądrowej

Ian Carmichael

University of Notre Dame

Piotr Filipiak

University of Notre Dame

P. K. Das

National Renewable Energy Laboratory

Halina Kozubek

Adam Mickiewicz University in Poznań

Christian Schöneich

University of Kansas

L. K. Patterson

University of Florida

Patrice Morlière

Inserm

René Santús

PhysioPathologie des Adaptations Nutritionnelles

Cooperative Institutions

University of Notre Dame

Adam Mickiewicz University in Poznań

Instytut Chemii i Techniki Jądrowej

Centre National de la Recherche Scientifique

University of Kansas

Friedrich-Alexander-Universität Erlangen-Nürnberg

Poznań University of Technology

Inserm

Pacific Northwest National Laboratory

Université de Picardie Jules Verne

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Photochemistry on Surfaces. Intermolecular Energy and Electron Transfer Processes between Excited Ru(bpy)32+ and H-Aggregates of Cresyl Violet on SiO2 and SnO2 Colloids

The Journal of Physical Chemistry (1995)

Di Liu Gordon L. Hug Prashant V. Kamat

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotochemistry on Surfaces. Intermolecular Energy and Electron Transfer Processes between Excited Ru(bpy)32+ and H-Aggregates of Cresyl Violet on SiO2 and SnO2 ColloidsDi Liu, Gordon L. Hug, and Prashant V. KamatCite this: J. Phys. Chem. 1995, 99, 45, 16768–16775Publication Date (Print):November 1, 1995Publication History Published online1 May 2002Published inissue 1 November 1995https://pubs.acs.org/doi/10.1021/j100045a043https://doi.org/10.1021/j100045a043research-articleACS PublicationsRequest reuse permissionsArticle Views334Altmetric-Citations45LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access options Get e-Alerts

Cresyl violet

10.1021/j100045a043

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Citations (45)

Multiple time scales in pulse radiolysis. Application to bromide solutions and dipeptides

Radiation Physics and Chemistry (1999)

Gordon L. Hug Yicheng Wang Christian Schöneich P. Y. Jiang Richard W. Fessenden

A description is given of how multiple time scales are incorporated into a new computer program for running pulse-radiolysis experiments on a linear accelerator. For any kinetic trace, the data can be presented on ten distinct time scales. The algorithms for doing this are presented. The utility of this procedure is illustrated with the radiolysis of bromide solutions. The kinetic traces are discussed in terms of formation of a BrOH− adduct and its approach to equilibrium with Br−2. A second example, with the radiolysis of a dipeptide Met–Met, illustrates the ease of simultaneously determining the yield and decay behavior.

10.1016/s0969-806x(98)00303-x

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Citations (115)

Quenching of excited doublet states of organic radicals by stable radicals

The Journal of Physical Chemistry (1989)

Anunay Samanta Kankan Bhattacharyya Puspendu K. Das Prashant V. Kamat D. Weir

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTQuenching of excited doublet states of organic radicals by stable radicalsA. Samanta, K. Bhattacharyya, P. K. Das, P. V. Kamat, D. Weir, and G. L. HugCite this: J. Phys. Chem. 1989, 93, 9, 3651–3656Publication Date (Print):May 1, 1989Publication History Published online1 May 2002Published inissue 1 May 1989https://pubs.acs.org/doi/10.1021/j100346a055https://doi.org/10.1021/j100346a055research-articleACS PublicationsRequest reuse permissionsArticle Views346Altmetric-Citations35LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access options Get e-Alerts

10.1021/j100346a055

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Citations (35)

Photooxidation of Methionine Derivatives by the 4‐Carboxybenzophenone Triplet State in Aqueous Solution. Intracomplex Proton Transfer Involving the Amino Group

Photochemistry and Photobiology (1998)

Gordon L. Hug Krzysztof Bobrowski Halina Kozubek Bronisław Marciniak

Abstract— Oxidation of the triplet state of 4‐carboxybenzophenone (CB) by a series of five substituted methionines and three methionine‐containing dipeptides was monitored under laser flash photolysis conditions in aqueous solution. Spectral resolution techniques were employed to follow the concentration profiles of the intermediates formed from the quenching events. From these concentration profiles, quantum yields for the intermediates were determined. Branching ratios were evaluated for the decay of the charge‐transfer complex by the competing processes of back electron transfer, proton transfer and escape of radical ions. The relative prominence of these processes was discussed in terms of the proton‐transfer tendencies of the nominal sulfur‐radical‐cationic species. A systematic decrease was observed in the quantum yields for the escape of radical ions along with a correlated increase in the proton‐transfer yields. The enhanced propensity of the sulfur radical cations to depro‐tonate is due to deprotonation at the carbons adjacent to the sulfur‐cationic site and at the unsubstituted amino groups when present. This scheme was supported by an observed decrease in the yields of dimeric sulfur radical cations with an increase in the electron‐withdrawing abilities of the substituents, making the radical‐cationic species stronger acids. The involvement of protons on the amino groups was implicated by the correlation of the quantum yields of ketyl radical formation in the photochemistry experiments with the rate constants for the reaction of the CB radical anion with the sulfur‐containing substrates in pulse radiolysis experiments.

Flash photolysis

Cationic polymerization

Radical ion

10.1111/j.1751-1097.1998.tb05285.x

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Citations (36)

ChemInform Abstract: Organic Photochemistry. Part 94. Triethylamine-Photosensitized Reduction of a Ketone via a Chemical Sensitization Mechanism.

ChemInform (1992)

Zheng‐Zhi Wu Gordon L. Hug Hugh Morrison

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Triethylamine

Mechanistic organic photochemistry

10.1002/chin.199226076

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Modeling the Chemistry in High-Level Waste Tanks: Effects of Radiation and Heat on Waste Simulants

Donald M. Camaioni Michel Dupuis Tom Autrey Dan Meisel Ian Carmichael

This report summarizes our research to develop quantitative and predictive understanding of the chemistry that is induced by radiation and heat in high-level waste (HLW) and computational capabilities to model that chemistry. The effort is meant to assist in establishing technical baseline knowledge required to make decisions on issues as they arise. We focus on complexants, which are ubiquitous in the waste and relevant to many issues concerning waste storage and site cleanup activities. Results to be presented include: (a) elucidation of the mechanism for oxidation of complexants by NO2 inferred from rate determinations, product studies, and electronic structure calculations, (b) new insights on the role of aluminum ions in catalyzing the thermal oxidation of complexants by NO2 -(c) advances in solvation models for calculating solution properties of oxoanions and radicals at the high ionic strength prevailing in HLW, (d) measurement of thermochemical properties of key intermediates (e.g., E(NOx -/NOx 2- ) and DfG and DfH of radicals in water) using the techniques of pulsed radiolysis and pulsed photoacoustic calorimetry, and (e) effects of particles on radiolytic production of H2.

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Kinetics of the Reactions between Sulfide Radical Cation Complexes, [S∴S]⁺ and [S∴N]⁺, and Superoxide or Carbon Dioxide Radical Anions

The Journal of Physical Chemistry A (2000)

M. Bonifačić Gordon L. Hug Christian Schöneich

The reaction of superoxide radical anions with sulfide radical cation complexes represents an important sulfoxide-forming process. Here, absolute rate constants for the reaction of sulfur−sulfur [>S∴S<]+ and sulfur−nitrogen ([>S∴NH2R]+) three-electron bonded sulfide radical cation complexes with superoxide and, for comparison, carbon dioxide radical anion have been measured by pulse radiolysis. For two different sulfur−sulfur bonded species, the intermolecular complex from dimethyl sulfide and the intramolecular complex from 1,5-dithia-3-hydroxycyclooctane, the rate constants for the reaction with superoxide are on the order of 1.6 × 1010 M-1 s-1 and with the carbon dioxide radical anion on the order of (6.5 ± 0.2) × 109 M-1 s-1. The fact that the stronger reducing carbon dioxide radical anion shows the lower rate constant can be rationalized by the higher internal reorganization energy of •CO2- as compared to O2•-. The rate constant for the reaction of superoxide with the sulfur−nitrogen bonded radical cation of Met-Gly, k = 5.3 × 109 M-1 s-1, is 3-fold lower as compared to that of the reaction with the sulfur−sulfur bonded radical cation complexes.

Radical ion

Hydroxyl radical

10.1021/jp9934578

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Citations (31)

Specific hydrogen-bonding effects in the photophysics of .beta.-apo-14'-carotenal. Static and dynamic aspects of fluorescence and triplet yield quenching

The Journal of Physical Chemistry (1983)

P. K. Das Gordon L. Hug

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpecific hydrogen-bonding effects in the photophysics of .beta.-apo-14'-carotenal. Static and dynamic aspects of fluorescence and triplet yield quenchingP. K. Das and G. L. HugCite this: J. Phys. Chem. 1983, 87, 1, 49–54Publication Date (Print):January 1, 1983Publication History Published online1 May 2002Published inissue 1 January 1983https://pubs.acs.org/doi/10.1021/j100224a014https://doi.org/10.1021/j100224a014research-articleACS PublicationsRequest reuse permissionsArticle Views44Altmetric-Citations4LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access options Get e-Alerts

Quantum yield

10.1021/j100224a014

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Citations (5)

White Light from Dual Intramolecular Charge-Transfer Emission in a Silylene-Bridged Styrylcarbazole and Pyrene Dyad

The Journal of Physical Chemistry C (2021)

Małgorzata Bayda Karolina Rachuta Gordon L. Hug Mariusz Majchrzak Bronisław Marciniak

Styrylcarbazole linked to pyrene by a dimethylsilyl bridge was synthesized in the search for new charge-transfer active materials for LED applications. In the course of a photophysical study, it turned out that such a donor-bridge-acceptor compound displayed three completely different types of emission depending on solvent polarity. The most attractive emission properties were found in acetonitrile in which two broad emission bands were observed. The resolved mechanism of the excited-state processes in acetonitrile was supported by singular value decomposition with self-modeling treatment of time-resolved emission spectra (ns-TCSPC). The data analysis revealed that there were two excited-state processes, that is, charge transfer within styrylcarbazole and electron transfer from styrylcarbazole to pyrene through a silylene bridge that was responsible for a broad dual emission. The general idea of designing compounds that display emission from more than one excited state covering a wide range of the visible spectrum can be a powerful tool in designing new white-light-emitting materials.

Silylene

Acceptor

10.1021/acs.jpcc.1c00990

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Citations (7)

Effects of molecular organization on photophysical behavior: Steady-state and real-time behavior of chlorophyll-b fluorescence in spread monolayers of dioleoylphosphatidylcholine

Thin Solid Films (1985)

J.‐P. Chauvet M. L. Agrawal Gordon L. Hug L. K. Patterson

10.1016/0040-6090(85)90444-4

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Citations (14)