Magnetic ordering in a vanadium-organic coordination polymer using a pyrrolo[2,3-d:5,4-d0] bis(thiazole)-based ligand (open access)

Magnetic ordering in a vanadium-organic coordination polymer using a pyrrolo[2,3-d:5,4-d0] bis(thiazole)-based ligand

This article presents the synthesis and characterization of a hybrid vanadium-organic coordination polymer with robust magnetic order, a Curie temperature TC of ~110 K, a coercive field of ~5 Oe at 5 K, and a maximum mass magnetization of about half that of the benchmark ferrimagnetic vanadium(tetracyanoethylene)~₂ (V·(TCNE)~₂).
Date: October 11, 2018
Creator: Getmanenko, Yulia A.; Mullins, Christopher S.; Nesterov, Vladimir N.; Lake, Stephanie; Risko, Chad & Johnston-Halperin, Ezekiel
System: The UNT Digital Library
Metal Matrix Composite Coatings of Cupronickel Embedded with Nanoplatelets for Improved Corrosion Resistant Properties (open access)

Metal Matrix Composite Coatings of Cupronickel Embedded with Nanoplatelets for Improved Corrosion Resistant Properties

This article studies the effects of nanoplatelet reinforcement on the durability, corrosion resistance, and mechanical properties of copper-nickel coatings.
Date: June 3, 2018
Creator: Thurber, Casey; Ahmad, Yahia H.; Calhoun, Margaret C.; Al-Shenawa, Amaal; D'Souza, Nandika; Mohamed, Adel M. A. et al.
System: The UNT Digital Library
Multimodal switching of a redox-active macrocycle (open access)

Multimodal switching of a redox-active macrocycle

This article looks at molecules that can exist in multiple states with the possibility of toggling between those states based on different stimuli. They have potential for use in molecular switching or sensing applications. The coupling of two different oxidation states with two different charge-transfer states within one macrocyclic scaffold delivers up to five different optical outputs. This molecular switching manifold exploits intramolecular coupling of multiple redox active substituents within a single molecule.
Date: March 1, 2019
Creator: Payne, Daniel T.; Webre, W. A.; Matsushita, Yoshitaka; Zhu, Nianyong; Futera, Zdeněk; Labuta, J. et al.
System: The UNT Digital Library
Nanoextraction Coupled to Liquid Chromatography Mass Spectrometry Delivers Improved Spatially Resolved Analysis (open access)

Nanoextraction Coupled to Liquid Chromatography Mass Spectrometry Delivers Improved Spatially Resolved Analysis

Article describes a study which demonstrates that it is possible to significantly improve the repeatability of the direct analyte-probed nanoextraction (DAPNe) technique by incorporating a liquid chromatography separation step.
Date: November 20, 2019
Creator: Lewis, Holly-May; Webb, Roger P.; Verbeck, Guido F.; Bunch, Josephine; de Jesus, Janella; Costa, Catia et al.
System: The UNT Digital Library
New molecular architectures containing low-valent cluster centres with di- and trimetalated 2-vinylpyrazine ligands: synthesis and molecular structures of Ru5(CO)15(μ5-C4H2N2CH[double bond, length as m-dash]CH)(μ-H)2 and Ru8(CO)24(μ7-C4H2N2CH[double bond, length as m-dash]C)(μ-H)3 (open access)

New molecular architectures containing low-valent cluster centres with di- and trimetalated 2-vinylpyrazine ligands: synthesis and molecular structures of Ru5(CO)15(μ5-C4H2N2CH[double bond, length as m-dash]CH)(μ-H)2 and Ru8(CO)24(μ7-C4H2N2CH[double bond, length as m-dash]C)(μ-H)3

Article details the reaction of Ru3(CO)12 with 2-vinylpyrazine, the aim of which was to synthesize clusters in which all of the donor atoms of the 2-vinylpyrazine ligand participate in bonding to the cluster core.
Date: July 4, 2019
Creator: Hossain, Md. Monir; Akter, Nahid; Ghosh, Shishir; Nesterov, Vladimir N.; Richmond, Michael G.; Hogarth, Graeme et al.
System: The UNT Digital Library
Occurrence of excited state charge separation in a N-doped graphene–perylenediimide hybrid formed via ‘click’ chemistry (open access)

Occurrence of excited state charge separation in a N-doped graphene–perylenediimide hybrid formed via ‘click’ chemistry

Article describes study in which researchers, using click chemistry, synthesized a donor–acceptor hybrid comprised of N-doped graphene and perylenediimide (PDI), a well-known electron-accepting photosensitizer.
Date: August 30, 2019
Creator: Gobeze, Habtom B.; Arellano, Luis M.; Gutiérrez-Vílchez, Ana María; Gómez-Escalonilla, María J.; Sastre-Santos, Ángela; Fernández-Lázaro, Fernando et al.
System: The UNT Digital Library
Partition of Neutral Molecules and Ions from Water to o-Nitrophenyl Octyl Ether and of Neutral Molecules from the Gas Phase to o-Nitrophenyl Octyl Ether (open access)

Partition of Neutral Molecules and Ions from Water to o-Nitrophenyl Octyl Ether and of Neutral Molecules from the Gas Phase to o-Nitrophenyl Octyl Ether

This article sets out an equation for partition of 87 neutral molecules from water to o-nitrophenyl octyl ether, NPOE, an equation for partition of the 87 neutral molecules and 21 ionic species from water to NPOE, and an equation for partition of 87 neutral molecules from the gas phase to NPOE.
Date: February 16, 2018
Creator: Abraham, M. H. (Michael H.); Acree, William E. (William Eugene) & Liu, Xiangli
System: The UNT Digital Library
Polarizable ab initio QM/MM Study of the Reaction Mechanism of N-tert-Butyloxycarbonylation of Aniline in [EMIm][BF4] (open access)

Polarizable ab initio QM/MM Study of the Reaction Mechanism of N-tert-Butyloxycarbonylation of Aniline in [EMIm][BF4]

This article presents the use of AMOEBA-based polarizable ab initio AM/MM simulations to investigate the reaction mechanism of the N-tert-butoxycarbonylation of aniline in a water/1-ethyl, 3-methyl imidazolium/tetrafluoroborate mixture.
Date: October 31, 2018
Creator: Vázquez-Montelongo, Erik Antonio; Vázquez-Cervantes, José Enrique & Cisneros, Gerardo Andrés
System: The UNT Digital Library
Polarization in electrostatics and circuits: Computing and visualizing surface charge distributions (open access)

Polarization in electrostatics and circuits: Computing and visualizing surface charge distributions

Article describing an algorithm or computing the detailed surface charge distributions in equilibrium electrostatic situations and in steady-state DC circuits, and discuss the results of the computations of surface charge distributions for several systems.
Date: December 14, 2018
Creator: Chabay, Ruth & Sherwood, Bruce
System: The UNT Digital Library
Porphyrinoid rotaxanes: building a mechanical picket fence (open access)

Porphyrinoid rotaxanes: building a mechanical picket fence

This article describes the active template CuAAC synthesis of interlocked triazole functionalised porphyrinoids in excellent yield.
Date: August 3, 2017
Creator: Ngo, T. H.; Labuta, J.; Lim, G. N.; Webre, W. A.; D'Souza, Francis; Karr, P. A. et al.
System: The UNT Digital Library
Promoting bioanalytical concepts in genetics: A TATA box molecularly imprinted polymer as a small isolated fragment of the DNA damage repairing system (open access)

Promoting bioanalytical concepts in genetics: A TATA box molecularly imprinted polymer as a small isolated fragment of the DNA damage repairing system

Article describes study which demonstrates that a new, stable, artificial TATA (T — thymine, A — adenine) box is recognized by amino acids recognizing the natural TATA box.
Date: February 13, 2019
Creator: Bartold, Katarzyna; Pietrzyk-Le, Agnieszka; Lisowski, Wojciech; Golebiewska, Karolina; Siklitskaya, Alexandra; Borowicz, Pawel et al.
System: The UNT Digital Library
Pyrene Bearing Azo-Functionalized Porous Nanofibers for CO₂ Separation and Toxic Metal Cation Sensing (open access)

Pyrene Bearing Azo-Functionalized Porous Nanofibers for CO₂ Separation and Toxic Metal Cation Sensing

This article describes the construction of a novel luminescent azo-linked polymer from 1,3,6,8-tetra(4--aminophenyl)pyrene using a copper(I)-catalyzed oxidative homocoupling reaction.
Date: August 6, 2018
Creator: El-Kadri, Oussama M.; Tessema, Tsemre-Dingel; Almotawa, Ruaa M.; Arvapally, Ravi K.; Al-Sayah, Mohammad H.; Omary, Mohammad A. et al.
System: The UNT Digital Library
Rate Coefficient Measurements and Theoretical Analysis of the OH + (E)‑CF₃CH==CHCF₃ Reaction (open access)

Rate Coefficient Measurements and Theoretical Analysis of the OH + (E)‑CF₃CH==CHCF₃ Reaction

Rate coefficients, k, for the gas-phase reaction of the OH radical with (E)CF3CHCHCF3 ((E)-1,1,1,4,4,4-hexafluoro-2-butene, HFO-1336mzz(E)) were measured over a range of temperatures (211−374 K) and bath gas pressures (20−300 Torr; He, N2) using a pulsed laser photolysis−laser-induced fluorescence (PLP−LIF) technique. k1(T) was independent of pressure over this range of conditions with k1(296 K) = (1.31 ± 0.15) × 10−13 cm3 molecule−1 s−1 and k1(T) = (6.94 ± 0.80) × 10−13exp[−(496 ± 10)/T] cm 3 molecule−1 s−1, where the uncertainties are 2σ, and the pre-exponential term includes estimated systematic error. Rate coefficients for the OD reaction were also determined over a range of temperatures (262−374 K) at 100 Torr (He). The OD rate coefficients were ∼15% greater than the OH values and showed similar temperature dependent behavior with k2(T) = (7.52 ± 0.44) × 10−13exp[−(476 ± 20)/T] and k2(296 K) = (1.53 ± 0.15) × 10−13 cm3 molecule−1 s−1. The rate coefficients for reaction 1 were also measured using a relative rate technique between 296 and 375 K with k1(296 K) measured to be (1.22 ± 0.1) × 10−13 cm3 molecule−1 s−1, in agreement with the PLP−LIF results. In addition, the 296 K rate coefficient for the O3 +( E)CF3CHCHCF3 reaction …
Date: March 22, 2018
Creator: Baasandorj, Munkhbayar; Marshall, Paul; Waterland, Robert L.; Ravishankara, A. R. & Burkholder, James B. (James Bart), 1954-
System: The UNT Digital Library
Reduced structural flexibility for an exonuclease deficient DNA polymerase III mutant (open access)

Reduced structural flexibility for an exonuclease deficient DNA polymerase III mutant

This article reports on the dynamics of E coli DNA polymerase III proofreading in the presence of its processivity factor, the β₂-sliding clamp, at varying base pair termini using single-molecule FRET.
Date: June 29, 2018
Creator: Gahlon, Hailey L.; Walker, Alice R.; Cisneros, Gerardo Andrés; Lamers, Meindert H. & Rueda, David S.
System: The UNT Digital Library
Relative Rate Studies of the Reactions of Atomic Chlorine with Acetone and Cyclic Ketones (open access)

Relative Rate Studies of the Reactions of Atomic Chlorine with Acetone and Cyclic Ketones

This article discusses the measurement of rate coefficients for CI atom reactions under ambient conditions with acetone and four cyclic ketones.
Date: November 23, 2017
Creator: Herath, Thushani N.; Orozco, Ivan & Marshall, Paul
System: The UNT Digital Library
Revisiting surface core-level shifts for ionic compounds (open access)

Revisiting surface core-level shifts for ionic compounds

Article establishing a theoretical method which is able to relate the binding energy shifts to the electronic structure of a material. In order to establish such a methodology, the CaO(100) surface to bulk core-level binding energy shifts are studied with Hartree-Fock and density-functional theory methods using both cluster and periodic slab models.
Date: September 12, 2019
Creator: Bagus, Paul S.; Nelin, Connie J.; Zhao, Xunhua; Levchenko, Sergey V.; Davis, Earl; Weng, Xuefei et al.
System: The UNT Digital Library
The role of the 5f valence orbitals of early actinides in chemical bonding 5f valence orbiatls of early actinides in chemical bonding (open access)

The role of the 5f valence orbitals of early actinides in chemical bonding 5f valence orbiatls of early actinides in chemical bonding

This article illuminates the role of the 5f valence orbitals of uranium, neptunium and plutonium in chemical bonding using advanced spectroscopies.
Date: July 6, 2017
Creator: Vitova, T.; Pidchenko, I.; Fellhauer, D.; Bagus, Paul S.; Joly, Y.; Pruessmann, T. et al.
System: The UNT Digital Library
Self-Reporting Molecularly Imprinted Polymer for Label-Free Selective Electrochemical Sensing of p-synephrine† (open access)

Self-Reporting Molecularly Imprinted Polymer for Label-Free Selective Electrochemical Sensing of p-synephrine†

This article is taken from the Proceedings of the 5th International Symposium on Sensor Science (I3S 2017). Molecularly imprinted polymers (MIPs) can be used in applications in selective chemosensing.
Date: December 4, 2017
Creator: Lach, Patrycja; Cieplak, Maciej; Sharma, Piyush S.; Sosnowska, Marta; D'Souza, Francis & Kutner, Wlodzimierz
System: The UNT Digital Library
Semi-Covalent Imprinting for Selective Protein Sensing at a Femtomolar Concentration Level (open access)

Semi-Covalent Imprinting for Selective Protein Sensing at a Femtomolar Concentration Level

This abstract introduces the development of an inventive new technique for protein imprinting.
Date: December 4, 2017
Creator: Dabrowski, Marcin; Cieplak, Maciej; Sharma, Piyush S.; Borowicz, Pawel; Noworyta, K.; Kuhn, Alexander et al.
System: The UNT Digital Library
Shining Light on Chitosan: A Review on the Usage of Chitosan for Photonics and Nanomaterials Research (open access)

Shining Light on Chitosan: A Review on the Usage of Chitosan for Photonics and Nanomaterials Research

This article highlights the different molecular-nano systems that are prepared or stabilized using the Chitosan polymer.
Date: June 17, 2018
Creator: Marpu, Sreekar & Benton, Erin N.
System: The UNT Digital Library
Solubility and Apparent Specific Volume of Sucrose in Some Aqueous Polyethylene Glycol Mixtures at 298.2 K (open access)

Solubility and Apparent Specific Volume of Sucrose in Some Aqueous Polyethylene Glycol Mixtures at 298.2 K

This article determines and correlates the equilibrium solubility of sucrose in {PEG 200 (or 400) + water} mixtures at 298.2 K.
Date: June 20, 2018
Creator: Tinjacá, Darío; Muñoz, María M.; Rahimpour, Elaheh; Jouyban, Abolghasem; Martínez, Fleming & Acree, William E. (William Eugene)
System: The UNT Digital Library
Solvation Descriptors for Zwitterionic α-Aminoacids; Estimation of Water–Solvent Partition Coefficients, Solubilities, and Hydrogen-Bond Acidity and Hydrogen-Bond Basicity (open access)

Solvation Descriptors for Zwitterionic α-Aminoacids; Estimation of Water–Solvent Partition Coefficients, Solubilities, and Hydrogen-Bond Acidity and Hydrogen-Bond Basicity

This article uses the literature data on solubilities and water–solvent partition coefficients to obtain properties or “Absolv descriptors” for zwitterionic α-aminoacids: glycine, α-alanine (α-aminopropanoic acid), α-aminobutanoic acid, norvaline (α-aminopentanoic acid), norleucine (α-aminohexanoic acid), valine (α-amino-3-methylbutanoic acid), leucine (α-amino-4-methylpentanoic acid), and α-phenylalanine.
Date: February 8, 2019
Creator: Abraham, M. H. (Michael H.) & Acree, William E. (William Eugene)
System: The UNT Digital Library
Structure and Electronic Properties of InSb Nanowires Grown in Flexible Polycarbonate Membranes (open access)

Structure and Electronic Properties of InSb Nanowires Grown in Flexible Polycarbonate Membranes

The article explores the various factors that affect nucleation and nanowire growth. A dense array of vertically aligned indium antimonide (InSb) nanowires with high aspect ratio were grown in the pores of a track-etched polycarbonate membrane via a one-step electrochemical method.
Date: September 5, 2019
Creator: Singh, Abhay; Roccapriore, Kevin M.; Algarni, Zaina; Salloom, Riyadh; Golden, Teresa Diane, 1963- & Philipose, Usha
System: The UNT Digital Library
Surface Activation and Pretreatments for Biocompatible Metals and Alloys Used in Biomedical Applications (open access)

Surface Activation and Pretreatments for Biocompatible Metals and Alloys Used in Biomedical Applications

Article describes the main surface activation and pretreatment techniques for substrates such as titanium and its alloys, stainless steel, magnesium alloys, and CoCrMo alloys.
Date: June 2, 2019
Creator: Huynh, Vivian; Ngo, Ngan K. & Golden, Teresa Diane, 1963-
System: The UNT Digital Library