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A new synthetic route for the preparation of [Os3(CO)10(μ-OH)(μ-H)] and its reaction with bis(diphenylphosphino)methane (dppm): syntheses and X-ray structures of two isomers of [Os3(CO)8(μ-OH)(μ-H)(μ-dppm)] and [Os3(CO)7(μ3-CO)(μ3-O)(μ-dppm)] (open access)

A new synthetic route for the preparation of [Os3(CO)10(μ-OH)(μ-H)] and its reaction with bis(diphenylphosphino)methane (dppm): syntheses and X-ray structures of two isomers of [Os3(CO)8(μ-OH)(μ-H)(μ-dppm)] and [Os3(CO)7(μ3-CO)(μ3-O)(μ-dppm)]

Article describes a convenient synthetic method for the preparation of the hydroxy-bridged triosmium cluster [Os₃(CO)₁₀(μ-OH)(μ-H)] along with the re-evaluation of the reaction of this cluster with dppm that has led to the isolation of a new isomer for [Os₃(CO)₈(μ-OH)(μ-H)(μ-dppm)].
Date: December 17, 2020
Creator: Richmond, Michael G.; Joy, Tuhinur R.; Bhoumik, Nikhil C.; Ghosh, Shishir & Kabir, Shariff E.
Object Type: Article
System: The UNT Digital Library
Spatial Engineering Direct Cooperativity between Binding Sites for Uranium Sequestration (open access)

Spatial Engineering Direct Cooperativity between Binding Sites for Uranium Sequestration

This article gives a full account of the conceptual and experimental development from randomly distributed functionalities to a convergent arrangement that facilitates cooperative binding is given, thus conferring exceptional affinity toward the analyte of interest. The concept presented here uncovers a new paradigm in the design of efficient sorbent materials by manipulating the spatial distribution to amplify the cooperation of functions.
Date: December 4, 2020
Creator: Sun, Qi; Song, Yanpei; Aguila, Briana; Ivanov, Aleksandr S.; Bryantsev, Vyacheslav S. & Ma, Shengqian
Object Type: Article
System: The UNT Digital Library
[Examining the Role of Nanomaterials and Optical Sensors for Genomics Research] captions transcript

[Examining the Role of Nanomaterials and Optical Sensors for Genomics Research]

This presentation introduces the possibility of using nanomaterials and optically active sensors in genomics research. The presenter shares the history and applications of nanomaterials, introduces their research into optical-luminescent sensors and optically active plasmonic nanoparticles, and explores how they might be used in genomics. It was presented at the UNT Transdisciplinary Conference on Ancestral Genomics Research which was held virtually on November 20-21, 2020.
Date: November 21, 2020
Creator: Marpu, Sreekar
Object Type: Video
System: The UNT Digital Library
Covalency in Fe2O3 and FeO: Consequences for XPS satellite intensity (open access)

Covalency in Fe2O3 and FeO: Consequences for XPS satellite intensity

Article examines the covalent character of the interaction between the metal cation and the oxygen ligands for two Fe oxides with different nominal oxidation states, Fe(II)O, and Fe(III)₂O₃.
Date: November 17, 2020
Creator: Bagus, Paul S.; Nelin, Connie J.; Brundle, C. R.; Crist, B. Vincent; Lahiri, N. & Rosso, Kevin M.
Object Type: Article
System: The UNT Digital Library
Electrochemical sensor for selective tyramine determination, amplified by a molecularly imprinted polymer film (open access)

Electrochemical sensor for selective tyramine determination, amplified by a molecularly imprinted polymer film

This article devised, fabricated, and tested a molecularly imprinted polymer (MIP) film based electrochemical sensor for selective determination of tyramine.
Date: November 17, 2020
Creator: Ayerdurai, Viknasvarri; Cieplak, Maciej; Noworyta, Krzysztof R.; Gajda, Marianna; Ziminska, Agnieszka; Sosnowska, Marta et al.
Object Type: Article
System: The UNT Digital Library
Charge stabilization via electron exchange: excited charge separation in symmetric, central triphenylamine derived, dimethylaminophenyl–tetracyanobutadiene donor–acceptor conjugates (open access)

Charge stabilization via electron exchange: excited charge separation in symmetric, central triphenylamine derived, dimethylaminophenyl–tetracyanobutadiene donor–acceptor conjugates

This article hypothesizes and demonstrates a new mechanism to stabilize the charge separated states via the process of electron exchange among the different acceptor entities in multimodular donor–acceptor conjugates. This work constitutes the first example of stabilizing charge-separated states via the process of electron exchange.
Date: November 13, 2020
Creator: Yadav, Indresh S.; Alsaleh, Ajyal Z.; Misra, Rajneesh & D'Souza, Francis
Object Type: Article
System: The UNT Digital Library
Chemical and Genetic Studies on the Formation of Pyrrolones During the Biosynthesis of Cytochalasans (open access)

Chemical and Genetic Studies on the Formation of Pyrrolones During the Biosynthesis of Cytochalasans

This article investigates the role of the highly conserved α,β-hydrolase enzymes PyiE and ORFZ during the biosynthesis of pyrichalasin H and the ACE1 metabolite, respectively, using gene knockout and complementation techniques. Taken together the results suggest that the α,β-hydrolase enzymes are essential for first ring cyclisation, but the precise nature of the intermediates remains to be determined.
Date: November 4, 2020
Creator: Zhang, Haili; Hantke, Verena; Bruhnke, Pia; Skellam, Elizabeth & Cox, Russell J.
Object Type: Article
System: The UNT Digital Library
In vitro anti-diabetic effects and phytochemical profiling of novel varieties of Cinnamomum zeylanicum (L.) extracts (open access)

In vitro anti-diabetic effects and phytochemical profiling of novel varieties of Cinnamomum zeylanicum (L.) extracts

Article exploring the use of pressured and decoctions water to extract anti-diabetic phytochemicals from cinnamon. The extensive metabolite profiling of novel SW and SG extracts and comparison of that with commercially available CC are reported for the first time in this study. The C. zeylanicum, SW accession holds some promise in the management of diabetes.
Date: April 27, 2020
Creator: Wariyapperuma, W.A. Niroshani M.; Kannangara, Sagarika; Wijayasinghe, Yasanandana S.; Subramanium, Sri & Jayawardena, Bimali
Object Type: Article
System: The UNT Digital Library
Aggregation-induced phosphorescence sensitization in two heptanuclear and decanuclear gold–silver sandwich clusters (open access)

Aggregation-induced phosphorescence sensitization in two heptanuclear and decanuclear gold–silver sandwich clusters

This article obtains two few-atom heterometallic gold–silver hepta-/decanuclear clusters, denoted Au₆Ag and Au₉Ag, and determines their structures by X-ray diffraction and mass spectrometry.
Date: October 30, 2020
Creator: Lu, Zhou; Yang, Yu-Jie; Ni, Wen-Xiu; Li, Mian; Zhao, Yifang; Huang, Yong-Liang et al.
Object Type: Article
System: The UNT Digital Library
Efficient separation of xylene isomers by a guest-responsive metal–organic framework with rotational anionic sites (open access)

Efficient separation of xylene isomers by a guest-responsive metal–organic framework with rotational anionic sites

Article demonstrating the adaptively molecular discrimination of xylene isomers by employing a NbOF52−-pillared metal–organic framework (NbOFFIVE-bpy-Ni, also referred to as ZU-61) with rotational anionic sites.
Date: October 28, 2020
Creator: Cui, Xili; Niu, Zheng; Shan, Chuan; Yang, Lifeng; Hu, Jianbo; Wang, Qingju et al.
Object Type: Article
System: The UNT Digital Library
Plasma modification of vanadium oxynitride surfaces: Characterization by in situ XPS experiments and DFT calculations (open access)

Plasma modification of vanadium oxynitride surfaces: Characterization by in situ XPS experiments and DFT calculations

Article reports XPS and DFT findings regarding the O₂ plasma, NH₃ plasma, and NH₃+O₂ plasma treatment of sputter deposited vanadium oxynitride films.
Date: October 13, 2020
Creator: Osonkie, A.; Lee, V.; Chukwunenye, P.; Cundari, Thomas R., 1964- & Kelber, Jeffry A.
Object Type: Article
System: The UNT Digital Library
Formal oxo- and aza-[3 + 2] reactions of α-enaminones and quinones: a double divergent process and the roles of chiral phosphoric acid and molecular sieves (open access)

Formal oxo- and aza-[3 + 2] reactions of α-enaminones and quinones: a double divergent process and the roles of chiral phosphoric acid and molecular sieves

Article develops a double divergent process for the reaction of α-enaminones with quinones through facile manipulation of catalyst and additive, leading to structurally completely different products.
Date: September 21, 2020
Creator: Luo, Weiwei; Sun, Zhicheng; Fernando, E. H. Nisala; Nesterov, Vladimir N.; Cundari, Thomas R., 1964- & Wang, Hong
Object Type: Article
System: The UNT Digital Library
Au3-to-Ag3 coordinate-covalent bonding and other supramolecular interactions with covalent bonding strength (open access)

Au3-to-Ag3 coordinate-covalent bonding and other supramolecular interactions with covalent bonding strength

Article describes an efficient strategy for designing charge-transfer complexes using coinage metal cyclic trinuclear complexes (CTCs).
Date: September 11, 2020
Creator: Lu, Zhou; Chilukuri, Bhaskar; Yang, Chi; Rawashdeh, Abdel-Monem M.; Arvapally, Ravi K.; Tekarli, Sammer M. et al.
Object Type: Article
System: The UNT Digital Library
Metallic nanoparticle production and exposure/deposition system for toxicological research applications using zebrafish (open access)

Metallic nanoparticle production and exposure/deposition system for toxicological research applications using zebrafish

Article presents a method that provides a novel way to synthesize NPs and expose biological organisms for various toxicological analysis.
Date: September 3, 2020
Creator: Nayek, Subhayu; Aguilar, Roberto; Juel, Lauren A. & Verbeck, Guido F.
Object Type: Article
System: The UNT Digital Library
Metal–Organic Frameworks for Enzyme Immobilization: Beyond Host Matrix Materials (open access)

Metal–Organic Frameworks for Enzyme Immobilization: Beyond Host Matrix Materials

Article reviews current research of role/function diversities of host matrix metal–organic frameworks (MOFs), noting the importance of understanding enzyme structural alternation and enzyme−MOF interaction after immobilization.
Date: August 27, 2020
Creator: Wang, Xiaoliang; Lan, Pui Ching & Ma, Shengqian
Object Type: Article
System: The UNT Digital Library
A Statistical Analysis of Trans-Resveratrol in Grape Cane From Ten Varieties of Cultivated Wine Grapes (Vitis Spp.) (open access)

A Statistical Analysis of Trans-Resveratrol in Grape Cane From Ten Varieties of Cultivated Wine Grapes (Vitis Spp.)

This article isolated resveratrol by a non-optimized protocol from ten varieties of grape cane grown in central Texas, USA. A statistical grouping of the ten varieties suggests that Norton, Blanca du bois, Cabernet Sauvignon, and Lenoir are the best candidates to use for further resveratrol isolation.
Date: August 22, 2020
Creator: Rathburn, Harold; Bell, Peter; Cook, Scott; Mayberry, Darrell D.; Geye, Emryse & Goodrich, Ryann
Object Type: Article
System: The UNT Digital Library
Protein Determination with Molecularly Imprinted Polymer Recognition Combined with Birefringence Liquid Crystal Detection (open access)

Protein Determination with Molecularly Imprinted Polymer Recognition Combined with Birefringence Liquid Crystal Detection

Article integrating a molecularly imprinted polymer (MIP) film recognition unit with a liquid crystal (LC) in an optical cell transducer to incur the selectivity of liquid crystal-based sensors.
Date: August 20, 2020
Creator: Cieplak, Maciej; Węgłowski, Rafał; Iskierko, Z.; Węgłowska, Dorota; Sharma, Piyush S.; Noworyta, Krzysztof R. et al.
Object Type: Article
System: The UNT Digital Library
Reactions of triosmium and triruthenium clusters with 2-ethynylpyridine: new modes for alkyne C–C bond coupling and C–H bond activation (open access)

Reactions of triosmium and triruthenium clusters with 2-ethynylpyridine: new modes for alkyne C–C bond coupling and C–H bond activation

Article investigates the reaction of the trimetallic clusters [H₂Os₃(CO)₁₀] and [Ru₃(CO)₁₀L₂] (L = CO, MeCN) with 2-ethynylpyridine.
Date: August 19, 2020
Creator: Richmond, Michael G.; Joy, Tuhinur R.; Roknuzzaman; Hossain, Emdad; Ghosh, Shishir; Tocher, Derek A. et al.
Object Type: Article
System: The UNT Digital Library
Hole-punching for enhancing electrocatalytic activities of 2D graphene electrodes: Less is more (open access)

Hole-punching for enhancing electrocatalytic activities of 2D graphene electrodes: Less is more

Article develops 2D carbon electrocatalysts based on graphene with and without punched holes and/or N-doping and performs a comprehensive combined experimental and theoretical study on the edge and surface electrocatalytic activities of single-layer 2D graphene sheets.
Date: August 17, 2020
Creator: Xia, Zhenhai; Gao, Yunxiang; Zhang, Lipeng; Li, Chang Ming & Dai, Liming
Object Type: Article
System: The UNT Digital Library
Review—Two Different Multiple Photosynthetic Reaction Centers Using Either Zinc Porphyrinic Oligopeptide-Fulleropyrrolidine or Free-Base Porphyrinic Polypeptide-Li+@C60 Supramolecular Complexes (open access)

Review—Two Different Multiple Photosynthetic Reaction Centers Using Either Zinc Porphyrinic Oligopeptide-Fulleropyrrolidine or Free-Base Porphyrinic Polypeptide-Li+@C60 Supramolecular Complexes

Article presents an overview of two successful examples of photosynthetic reaction center models combined with light-capturing antenna chromophores. This article is part of the JSS Focus Issue on Porphyrins, Phthalocyanines, and Supramolecular Assemblies in Honor of Karl M. Kadish.
Date: August 10, 2020
Creator: D'Souza, Francis; Solladié, Nathalie; Fukuzumi, Shunichi; Ohkubo, Kei; Rein, Régis; Saito, Kenji et al.
Object Type: Article
System: The UNT Digital Library
Oxidation of methylamine (open access)

Oxidation of methylamine

Article describes how a detailed chemical kinetic model for oxidation of methylamine has been developed, based on theoretical work and a critical evaluation of data from the literature. The mechanism was validated against experimental results from batch reactors, flow reactors, shock tubes, and premixed flames. This is the accepted manuscript version of the published article.
Date: August 5, 2020
Creator: Glarborg, Peter; Andreasen, Charlotte S.; Hashemi, Hamid; Qian, Rachel & Marshall, Paul
Object Type: Article
System: The UNT Digital Library
Multi-modal surface analysis of porous films under operando conditions (open access)

Multi-modal surface analysis of porous films under operando conditions

Article presents thin film analogs of practical catalysts that allow for the implementation of surface characterization tools, including advanced microscopy and operando spectroscopy methodologies.
Date: August 4, 2020
Creator: Eads, Calley N.; Zhong, Jian-Qiang; Kim, Donghun; Akter, Nusnin; Chen, Zhihengyu; Norton, Angela M. et al.
Object Type: Article
System: The UNT Digital Library
Electropolymerizable meso-Tetrakis Biphenyl-Bis(bithiophene) Zinc Porphyrin: Ground and Excited State Properties in Solution and in Films with Axially Coordinated C60 (open access)

Electropolymerizable meso-Tetrakis Biphenyl-Bis(bithiophene) Zinc Porphyrin: Ground and Excited State Properties in Solution and in Films with Axially Coordinated C60

Article presenting research where an electropolymerizable zinc porphyrin carrying eight entities of peripheral bithiophene, 4 was newly designed and synthesized.
Date: July 9, 2020
Creator: Ganesan, Ashwin; Shao, Shuai; Seetharaman, Sairaman; Perera, Wijayantha A. & D'Souza, Francis
Object Type: Article
System: The UNT Digital Library
Single-Step Photochemical Formation of Near-Infrared-Absorbing Gold Nanomosaic within PNIPAm Microgels: Candidates for Photothermal Drug Delivery (open access)

Single-Step Photochemical Formation of Near-Infrared-Absorbing Gold Nanomosaic within PNIPAm Microgels: Candidates for Photothermal Drug Delivery

Article demonstrating the dynamic potential for tailoring the surface plasmon resonance (SPR), size, and shapes of gold nanoparticles (AuNPs) starting from an Au(I) precursor, chloro(dimethyl sulfide)gold (I) (Au(Me2S)Cl), in lieu of the conventional Au(III) precursor hydrogen tetrachloroaurate (III) hydrate (HAuCl4). This approach presents a one-step method that permits regulation of an Au(I) precursor to form either visible-absorbing gold nanospheres or near-infrared-window (NIRW)-absorbing anisotropic AuNPs.
Date: May 18, 2020
Creator: Marpu, Sreekar; Kamras, Brian; Nasiri, Nooshin Mirza; Elbjeirami, Oussama; Simmons, Denise Perry; Hu, Zhibing et al.
Object Type: Article
System: The UNT Digital Library