Index Catalog // ScholarsArchive@OSU

Air quality and elemental enrichment factors of aerosol particulate matter in Riyadh City, Saudi Arabia

Creator:: Rushdi, Ahmed I., Al-Mutlaq, Khalid F., Al-Otaibi, Mubarak, El-Mubarak, Aarif H., and Simoneit, Bernd R. T.
Abstract:: Air particulate matter (PM) samples were collected from June 2006 to May 2007 for determination chemical elements. PM samples were taken in two size fractions (PM₂.₅ and PM₁₀) with MiniVolume air samplers on rooftops of various buildings (15-25 m above ground) in the city of Riyadh. The samples were subjected...
Resource Type:: Preprint and Article

Heterogeneous Reactions of PM-Bound PAHs and NPAHs with NO₃/N₂O₅, OH Radicals, and O₃ under Simulated Long-Range Atmospheric Transport Conditions: Reactivity and Mutagenicity

Creator:: Jariyasopit, Narumol, Zimmermann, Kathryn, Schrlau, Jill, Arey, Janet, Atkinson, Roger, Yu, Tian-Wei, Dashwood, Roderick H., Tao, Shu, and Simonich, Staci L. Massey
Abstract:: The heterogeneous reactions of ambient particulate matter (PM)-bound polycyclic aromatic hydrocarbons (PAHs) and nitro-PAHs (NPAHs) with NO₃/N₂O₅, OH radicals, and O₃ were studied in a laboratory photochemical chamber. Ambient PM[subscript 2.5] and PM₁₀ samples were collected from Beijing, China and Riverside, California, and exposed under simulated atmospheric long-range transport conditions...
Resource Type:: Article

Influence of Asian and Western U.S. Urban Areas and Fires on the Atmospheric Transport of PAHs, PCBs, and FTOHs in the Western U.S.

Creator:: Primbs, Toby, Piekarz, Arkadiusz, Wilson, Glenn, Schmedding, David, Higginbotham, Carol, Field, Jennifer, and Simonich, Staci
Abstract:: Atmospheric measurements of semivolatile organic compounds (SOCs) were made at Mt. Bachelor Observatory (MBO), located in Oregon’s Cascade Range, to understand the trans-Pacific and regional transport of SOCs from urban areas. High volume air sampling (~644 m³ for 24 hour periods) of both the gas and particulate phases was conducted...
Resource Type:: Article

Synthesis of α-Ketoester- and α-Hydroxyester-Substituted Isoindazoles via the Thermodynamic Coarctate Cyclization of Ester-Terminated Azo-Ene-Yne Systems

Creator:: McClintock, Sean P., Forster, Nathan, Herges, Rainer, and Haley, Michael M.
Abstract:: The synthesis of isoindazoles bearing α-ketoester and α-hydroxyester groups via the coarctate cyclization of ester terminated azo-ene-yne precursors is described. Whereas previous studies on isoindazole formation have shown the reaction to proceed through a kinetic coarctate pathway, functionalization of the terminal acetylene with a methyl ester sufficiently stabilizes the carbene...
Resource Type:: Article

Influence of Asian and Western United States Agricultural Areas and Fires on the Atmospheric Transport of Pesticides in the Western United States

Creator:: Primbs, Toby, Wilson, Glenn, Schmedding, David, Higginbotham, Carol, and Simonich, Staci Massey
Abstract:: Historic and current use pesticides (HUPs and CUPs), with respect to use in the United States and Canada, were identified in trans-Pacific and regional air masses at Mt. Bachelor Observatory (MBO), a remote high elevation mountain in Oregon’s Cascade Range located in the United States, during the sampling period of...
Resource Type:: Article

Protein Adducts of Aldehydic Lipid Peroxidation Products: Identification and Characterization of Protein Adducts Using an Aldehyde/Keto Reactive Probe in Combination with Mass Spectrometry

Creator:: Maier, Claudia S., Chavez, Juan, Wang, Jing, and Wu, Jianyong
Abstract:: This chapter describes a mass spectrometry-based strategy that facilitates the unambiguous identification and characterization of proteins modified by lipid peroxidation-derived 2-alkenals. The approach employs a biotinylated hydroxyl amine derivative as an aldehyde/keto reactive probe in conjunction with selective enrichment and tandem mass spectrometric analysis. Methodological details are given for model...
Resource Type:: Part of Book

Quantification of Complex Polycyclic Aromatic Hydrocarbon Mixtures in Standard Reference Materials Using GC×GC/ToF-MS

Creator:: Manzano, Carlos, Hoh, Eunha, and Simonich, Staci L. Massey
Abstract:: This research is the first to quantify complex PAH mixtures in NIST SRMs using comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry (GC×GC/ToF-MS), with and without extract cleanup, and reports previously unidentified PAH isomers in the NIST SRMs. We tested a novel, high orthogonality GC column combination (LC-50×NSP-35), as...
Resource Type:: Article

Graphene reduced from magnesiothermic reaction

Creator:: Luo, Wei, Wang, Bao, Wang, Xingfeng, Stickle, William F., and Ji, Xiulei
Abstract:: We, for the first time, employ magnesiothermic reaction to convert microwave-irradiated graphite oxide to pure graphene. The magnesiothermic reaction raises the carbon to oxygen atomic ratio from 22.2 to 165.7 and maintains a high surface area. The new strategy demonstrates an efficient method for obtaining highly pure graphene materials.
Resource Type:: Article

C–H···O Non-Classical Hydrogen Bonding in the Stereomechanics of Organic Transformations: Theory and Recognition

Creator:: Johnston, Ryne C. and Cheong, Paul Ha-Yeon
Abstract:: This manuscript describes the role of non-classical hydrogen bonds (NCHBs), specifically C–H···O interactions, in modern synthetic organic transformations. Our goal is to point out the seminal examples where C–H···O interactions have been invoked as a key stereocontrolling element and to provide predictive value in recognizing future and/or potential C–H···O interactions...
Resource Type:: Article

The Electrochemical Synthesis of the Graphite Intercalation Compounds Containing Tetra-n-alkylammonium Cations

Creator:: Sirisaksoontorn, Weekit and Lerner, Michael M.
Abstract:: The electrochemical intercalation of tetra-n-alkylammonium (TAA) cations into graphite is investigated using galvanostatic reduction and cyclic voltammetry in TAABr/ dimethylsulfoxide (DMSO) electrolytes. Structural and compositional analyzes by X-ray diffraction, thermogravimetric and elemental analyzes show that stable graphite intercalation compounds (GICs) are formed with highly-flattened TAA cation bilayers for (C₅H₁₁)₄N⁺, (C₆H₁₃)₄N⁺,...
Resource Type:: Article

Effects of molecular potential and geometry on atomic core-level photoemission over an extended energy range: The case study of the CO molecule

Creator:: Kukk, E., Travnikova, O., Mondal, S., Kimura, M., Sakai, K., Miron, C., Martín, F., Ueda, K., Ayuso, D., Thomas, T. D., Decleva, P., Patanen, M., Argenti, L., Plésiat, E., Palacios, A., and Kooser, K.
Abstract:: We report an experimental and theoretical study of single-molecule inner-shell photoemission measured over an extended range of photon energies. The vibrational intensity ratios I (nu = 1)/I (nu = 0) from the C 1s photoelectron spectra of carbon monoxide, although mostly determined by the bond length change upon ionization, are...
Resource Type:: Article

Excited-State Proton Transfer of Photoexcited Pyranine in Water Observed by Femtosecond Stimulated Raman Spectroscopy

Creator:: Han, Fangyuan, Liu, Weimin, and Fang, Chong
Abstract:: We use femtosecond stimulated Raman spectroscopy (FSRS) to illuminate the choreography of intermolecular excited-state proton transfer (ESPT) of photoacid pyranine (8-hydroxypyrene-1,3,6-trisulfonic acid, HPTS) in water. The multidimensional reaction coordinate responsible for photoacidity is revealed to involve sequential activation of characteristic skeletal motions during the ca. 1 ps preparation stage preceding...
Resource Type:: Article

Laboratory-frame electron angular distributions: Probing the chemical environment through intramolecular electron scattering

Creator:: Patanen, M., Travnikova, O., Zahl, M. G., Söderstrom, J., Decleva, P., Thomas, T. D., Svensson, S., Mårtensson, N., Børve, K. J., Sæthre, L. J., and Miron, C.
Abstract:: Carbon 1s photoelectron asymmetry parameters β for the chlorinated and the methyl carbon atom of CH₃CH₂Cl, CH₃CHCl₂, and CH₃CCl₃ have been measured using synchrotron radiation in the 340-600 eV energy range. We provide experimental evidence that the intramolecular scattering strongly affects beta values, even far from the ionization threshold. The...
Resource Type:: Article

Structural and magnetic investigation of In₂Fe₂₋ₓGaₓCuO₇

Creator:: Grajczyk, Rosa, Chan, Adam, Ramirez, A. P., and Subramanian, M. A.
Abstract:: The solid solution of In₂Fe₂₋ₓGaₓCuO₇ (space group P6₃/mmc) was synthesized and investigated through X-ray diffraction and magnetic susceptibility studies. Limited changes to the lattice parameters were observed as a result of the similar ionic radii for Fe³⁺ and Ga³⁺ in the trigonal bipyramidal (TBP) crystallographic site. An increase in the...
Resource Type:: Article

Measurement of the fusion probability, P[subscript CN], for hot fusion reactions

Creator:: Yanez, R., Loveland, W., Barrett, J. S., Yao, L., Back, B. B., Zhu, S., and Khoo, T. L.
Abstract:: Abstract: Background: The cross section for forming a heavy evaporation residue in fusion reactions depends on the capture cross section, the fusion probability, P[subscript CN], i.e., the probability that the projectile-target system will evolve inside the fission saddle point to form a completely fused system rather than reseparating (quasifission), and...
Resource Type:: Article

Tunable sideband laser from cascaded four-wave mixing in thin glass for ultra-broadband femtosecond stimulated Raman spectroscopy

Creator:: Zhu, Liangdong, Liu, Weimin, and Fang, Chong
Abstract:: We demonstrate the generation of broadband up-converted multicolor array (BUMA) in a thin BK7 glass slide using two noncollinear weak near-IR laser pulses with various crossing angles. The BUMA signal arises from cubic nonlinear χ⁽³⁾:χ⁽³⁾ processes via cascaded four-wave mixing of the two incident beams. Broad and continuous tunability of...
Resource Type:: Article

Topotactic Reduction and Reoxidation of Hexagonal RCu0.5Ti0.5O3 (R =Y, Eu-Lu) Phases

Creator:: Jiang, Peng, Berthelot, Romian, Li, Jun, Sleight, A. W., and Subramanian, M. A.
Abstract:: Hexagonal AMO₂ and AMO₃ phases have the same basic structure, and intermediate compositions for this structure have been prepared by topotactic oxidation of AMO₂ phases such as RCuO₂, where R is a trivalent rare earth cation. We now find that such intermediate phases can also be prepared by topotactic reduction...
Resource Type:: Article

Refractive Index and Optical Dispersion of In2O3, InBO3 and Gahnite

Creator:: Medenbach, O., Siritanon, Theeranun, Subramanian, Mas, Dettmar, D., Shannon, R. D., and Fischer, R. X.
Abstract:: Refractive indices of In₂O₃, In₂₋ₓSnₓO₃, InBO₃ and 2 different gahnite crystals (ZnAl₂O₄ and Zn.₉₅Fe.₀₅Al₂O₄) were measured at wavelengths of 435.8 to 643.8 nm and were used to calculate n at λ = 589.3 nm ( nD ) and at λ = ∞ (n∞) using the one-term Sellmeier equation 1/(n²-1) =...
Resource Type:: Article

Solid Solution Studies of Layered Honeycomb-Ordered Phases O3-Na3M2SbO6 (M = Cu, Mg, Ni, Zn)

Creator:: Schmidt, Whitney, Berthelot, Romain, Sleight, A. W., and Subramanian, M. A.
Abstract:: Complete solid solutions with the composition Na₃M₂₋ₓM’ₓSbO₆ where M, M’ = Cu, Mg, Ni, Zn have been synthesized by conventional solid state techniques and were investigated using X-ray diffraction, magnetism and optical measurements. All compositions crystallize in a monoclinic unit cell and exhibit a layered structure with a honeycomb cationic...
Resource Type:: Article

Cascaded four-wave mixing for broadband tunable laser sideband generation

Creator:: Liu, Weimin, Zhu, Liangdong, Wang, Liang, and Fang, Chong
Abstract:: We demonstrate the versatile broadband wavelength tunability of frequency upconverted multicolor cascaded fourwave-mixing (CFWM) signals spanning the continuous wavelength range from UV to near IR in a thin type-I BBO crystal using 35 fs, 800 nm fundamental and chirped IR supercontinuum white light pulses. Two sets of spatially dispersed CFWM...
Resource Type:: Article

ScholarsArchive@OSU

Air quality and elemental enrichment factors of aerosol particulate matter in Riyadh City, Saudi Arabia

Heterogeneous Reactions of PM-Bound PAHs and NPAHs with NO₃/N₂O₅, OH Radicals, and O₃ under Simulated Long-Range Atmospheric Transport Conditions: Reactivity and Mutagenicity

Influence of Asian and Western U.S. Urban Areas and Fires on the Atmospheric Transport of PAHs, PCBs, and FTOHs in the Western U.S.

Synthesis of α-Ketoester- and α-Hydroxyester-Substituted Isoindazoles via the Thermodynamic Coarctate Cyclization of Ester-Terminated Azo-Ene-Yne Systems

Influence of Asian and Western United States Agricultural Areas and Fires on the Atmospheric Transport of Pesticides in the Western United States

Protein Adducts of Aldehydic Lipid Peroxidation Products: Identification and Characterization of Protein Adducts Using an Aldehyde/Keto Reactive Probe in Combination with Mass Spectrometry

Quantification of Complex Polycyclic Aromatic Hydrocarbon Mixtures in Standard Reference Materials Using GC×GC/ToF-MS

Graphene reduced from magnesiothermic reaction

C–H···O Non-Classical Hydrogen Bonding in the Stereomechanics of Organic Transformations: Theory and Recognition

The Electrochemical Synthesis of the Graphite Intercalation Compounds Containing Tetra-n-alkylammonium Cations

Effects of molecular potential and geometry on atomic core-level photoemission over an extended energy range: The case study of the CO molecule

Excited-State Proton Transfer of Photoexcited Pyranine in Water Observed by Femtosecond Stimulated Raman Spectroscopy

Laboratory-frame electron angular distributions: Probing the chemical environment through intramolecular electron scattering

Structural and magnetic investigation of In₂Fe₂₋ₓGaₓCuO₇

Measurement of the fusion probability, P[subscript CN], for hot fusion reactions

Tunable sideband laser from cascaded four-wave mixing in thin glass for ultra-broadband femtosecond stimulated Raman spectroscopy

Topotactic Reduction and Reoxidation of Hexagonal RCu0.5Ti0.5O3 (R =Y, Eu-Lu) Phases

Refractive Index and Optical Dispersion of In2O3, InBO3 and Gahnite

Solid Solution Studies of Layered Honeycomb-Ordered Phases O3-Na3M2SbO6 (M = Cu, Mg, Ni, Zn)

Cascaded four-wave mixing for broadband tunable laser sideband generation

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