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inorganic chemistry

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https://www.readbyqxmd.com/read/28930696/impact-of-a-newly-formed-periglacial-environment-and-other-factors-on-fresh-water-chemistry-at-the-western-shore-of-admiralty-bay-in-the-summer-of-2016-king-george-island-maritime-antarctica
#1
Małgorzata Szopińska, Danuta Szumińska, Robert Józef Bialik, Stanisław Chmiel, Joanna Plenzler, Żaneta Polkowska
This study provides a comprehensive analysis of the inorganic chemistry of flowing water at the western shore of Admiralty Bay. In the water samples, ions, and major and trace metals (and B) were detected and quantified. Additionally, the parameters of pH, specific electrolytic conductivity (SEC25) and total organic carbon (TOC) were determined. Moreover, multivariate data set was created and Principal Component Analysis (PCA) was performed. Generally, the water has low total content of the measured mineral constituents <100mgL(-1)...
September 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28930435/new-triplet-sensitization-routes-for-photon-upconversion-thermally-activated-delayed-fluorescence-molecules-inorganic-nanocrystals-and-singlet-to-triplet-absorption
#2
Nobuhiro Yanai, Nobuo Kimizuka
Photon upconversion based on triplet-triplet annihilation (TTA-UC) has attracted much interest because of its possible applications to renewable energy production and biological fields. In particular, the UC of near-infrared (NIR) light to visible (vis) light is imperative to overcome the Shockley-Queisser limit of single-junction photovoltaic cells, and the efficiency of photocatalytic hydrogen production from water can also be improved with the aid of vis-to-ultraviolet (UV) UC. However, both processes have met limitations in the wavelength range, efficiency, and sensitivity for weak incident light...
September 20, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28920090/reconstructing-coral-calcification-fluid-dissolved-inorganic-carbon-chemistry-from-skeletal-boron-an-exploration-of-potential-controls-on-coral-aragonite-b-ca
#3
Nicola Allison
The boron geochemistry of coral skeletons reflects the dissolved inorganic carbon (DIC) chemistry of the calcification fluid from which the skeletons precipitates and may be a valuable tool to investigate the effects of climate change on coral calcification. In this paper I calculate the predicted B/Ca of aragonite precipitating from seawater based fluids as a function of pH, [DIC] and [Ca(2+)]. I consider how different co-precipitating DIC species affect aragonite B/Ca and also estimate the impact of variations in the B(OH)4(-)/co-precipitating DIC aragonite partition coefficient (KD), which may be associated with changes in the DIC and Ca(2+) chemistry of the calcification fluid...
August 2017: Heliyon
https://www.readbyqxmd.com/read/28903562/spontaneous-octahedral-tilting-in-the-cubic-inorganic-caesium-halide-perovskites-cssnx3-and-cspbx3-x-f-cl-br-i
#4
Ruo Xi Yang, Jonathan M Skelton, Lora da Silva, Jarvist M Frost, Aron Walsh
The local crystal structures of many perovskite-structured materials deviate from the average space group symmetry. We demonstrate, from lattice-dynamics calculations based on quantum chemical force constants, that all the caesium-lead and caesium-tin halide perovskites exhibit vibrational instabilities associated with octahedral titling in their high-temperature cubic phase. Anharmonic double-well potentials are found for zone-boundary phonon modes in all compounds with barriers ranging from 108 to 512 meV...
September 14, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28901581/hybrid-copper-nanowire-reduced-graphene-oxide-coatings-a-green-solution-toward-highly-transparent-highly-conductive-and-flexible-electrodes-for-opto-electronics
#5
Alessandro Aliprandi, Tiago Moreira, Cosimo Anichini, Marc-Antoine Stoeckel, Matilde Eredia, Ugo Sassi, Matteo Bruna, Carlos Pinheiro, César A T Laia, Sara Bonacchi, Paolo Samorì
This study reports a novel green chemistry approach to assemble copper-nanowires/reduced-graphene-oxide hybrid coatings onto inorganic and organic supports. Such films are robust and combine sheet resistances (<30 Ω sq(-1) ) and transparencies in the visible region (transmittance > 70%) that are rivalling those of indium-tin oxide. These electrodes are suitable for flexible electronic applications as they show a sheet resistance change of <4% after 10 000 bending cycles at a bending radius of 1.0 cm, when supported on polyethylene terephthalate foils...
September 13, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28889273/neurotoxicity-of-vanadium
#6
Hilary Afeseh Ngwa, Muhammet Ay, Huajun Jin, Vellareddy Anantharam, Arthi Kanthasamy, Anumantha G Kanthasamy
Vanadium (V) is a transition metal that presents in multiple oxidation states and numerous inorganic compounds and is also an ultra-trace element considered to be essential for most living organisms. Despite being one of the lightest metals, V offers high structural strength and good corrosion resistance and thus has been widely adopted for high-strength steel manufacturing. High doses of V exposure are toxic, and inhalation exposure to V adversely affects the respiratory system. The neurotoxicological properties of V are just beginning to be identified...
2017: Advances in Neurobiology
https://www.readbyqxmd.com/read/28866239/an-evaluation-of-soil-chemistry-in-human-cadaver-decomposition-islands-potential-for-estimating-postmortem-interval-pmi
#7
J P Fancher, J A Aitkenhead-Peterson, T Farris, K Mix, A P Schwab, D J Wescott, M D Hamilton
Soil samples from the Forensic Anthropology Research Facility (FARF) at Texas State University, San Marcos, TX, were analyzed for multiple soil characteristics from cadaver decomposition islands to a depth of 5centimeters (cm) from 63 human decomposition sites, as well as depths up to 15cm in a subset of 11 of the cadaver decomposition islands plus control soils. Postmortem interval (PMI) of the cadaver decomposition islands ranged from 6 to 1752 days. Some soil chemistry, including nitrate-N (NO3-N), ammonium-N (NH4-N), and dissolved inorganic carbon (DIC), peaked at early PMI values and their concentrations at 0-5cm returned to near control values over time likely due to translocation down the soil profile...
August 18, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28862784/-isolated-dyo-embedded-in-a-ceramic-apatite-matrix-featuring-single-molecule-magnet-behavior-with-a-high-energy-barrier-for-magnetization-relaxation
#8
Pavel E Kazin, Mikhail A Zykin, Valentina V Utochnikova, Oxana V Magdysyuk, Alexander V Vasiliev, Yan V Zubavichus, Walter Schnelle, Claudia Felser, Martin Jansen
Meeting the challenges of Moore's Law, predicting ambitious miniaturization rates of integrated circuits, requires to go beyond the traditional top-down approaches, and to employ synthetic chemistry methods, to use bottom-up techniques. During the recent decades, it has been shown that open-shell coordination compounds may exhibit intramolecular spontaneous magnetization, thus offering promising prospects for storage and processing of digital information. Against this background we regarded it rewarding to implement similar magnetic centers into a ceramic material, which would provide better long-term mechanical and chemical durability...
September 1, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28853564/organometallic-neptunium-chemistry
#9
Polly L Arnold, Michał S Dutkiewicz, Olaf Walter
Fifty years have passed since the foundation of organometallic neptunium chemistry, and yet only a handful of complexes have been reported, and even fewer have been fully characterized. Yet, increasingly, combined synthetic/spectroscopic/computational studies are demonstrating how covalently bonding, soft, carbocyclic organometallic ligands provide an excellent platform for advancing the fundamental understanding of the differences in orbital contributions and covalency in f-block metal-ligand bonding. Understanding the subtleties is the key to the safe handling and separations of the highly radioactive nuclei...
September 13, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28844184/the-argentinian-mother-and-child-contaminant-study-a-cross-sectional-study-among-delivering-women-in-the-cities-of-ushuaia-and-salta
#10
Inger Økland, Jon Øyvind Odland, Silvinia Matiocevich, Marisa Viviana Alvarez, Torbjørn Aarsland, Evert Nieboer, Solrunn Hansen
Several ongoing international multidisciplinary projects have examined linkages between environmental chemicals and health. In contrast to Arctic regions, information for the Southern Hemisphere is scarce. Because of the inherent practice of pesticide utilisation and mismanagement, food security is potentially threatened. The most vulnerable period in human life occurs during pregnancy and early childhood, thus a focus on the body burdens of PTS in pregnant or delivering women is warranted. The current study was designed to investigate health risks related to exposure to PTS and food security in two regions of Argentina (Ushuaia and Salta)...
2017: International Journal of Circumpolar Health
https://www.readbyqxmd.com/read/28840926/structure-dependent-reactivity-of-criegee-intermediates-studied-with-spectroscopic-methods
#11
Jim Jr-Min Lin, Wen Chao
Criegee intermediates are very reactive carbonyl oxides that are formed in reactions of unsaturated hydrocarbons with ozone (ozonolysis). Recently, Criegee intermediates have gained significant attention since a new preparation method has been reported in 2012, which employs the reaction of iodoalkyl radical with molecular oxygen: for instance, CH2I + O2 → CH2OO + I. This new synthesis route can produce Criegee intermediates with a high number density, which allows direct detection of the Criegee intermediate via various spectroscopic tools, including vacuum UV photoionization mass spectrometry, absorption and action spectroscopy in the UV and IR regions, and microwave spectroscopy...
August 25, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28800236/inorganic-nanoparticle-induced-morphological-transition-for-confined-self-assembly-of-block-copolymers-within-emulsion-droplets
#12
Yan Zhang, Yun He, Nan Yan, Yutian Zhu, Yuexin Hu
Recently, it has been reported that the incorporation of functional inorganic nanoparticles (NPs) into the three-dimensional (3D) confined self-assembly of block copolymers (BCPs) creates the unique nanostructured hybrid composites, which can not only introduce new functions to BCPs but also induce some interesting morphological transitions of BCPs. In the current study, we systematically investigate the cooperative self-assembly of a series of size-controlled and surface chemistry-tunable gold nanoparticles (AuNPs) and polystyrene-b-poly(2-vinylpyridine) (PS-b-P2VP) diblock copolymer within the emulsion droplets...
August 28, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28795495/thiol-ene-click-reaction-as-a-facile-and-general-approach-for-surface-functionalization-of-colloidal-nanocrystals
#13
Bin Liu, Xiaoran Deng, Zhongxi Xie, Ziyong Cheng, Piaoping Yang, Jun Lin
Oleic acid (OA) and/or oleylamine (OAm) are generally used as the surface ligands for stabilization of inorganic nanocrystals (NCs). The hydrophobic and inert surface of the NCs limits their applications such as in biomedical areas. Hence, surface modifications are essential in many physical and chemical processes. Here, a facile and versatile strategy is reported for the modification of NCs by ultraviolet-induced thiol-ene chemistry, in which thiol-terminated poly(ethylene glycol) (HSPEG) and its derivatives can react directly with double bonds in OA/OAm ligands to form covalent linking within one step...
August 10, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28790423/decoupling-between-the-response-of-coral-calcifying-fluid-ph-and-calcification-to-ocean-acidification
#14
S Comeau, C E Cornwall, M T McCulloch
Evaluating the factors responsible for differing species-specific sensitivities to declining seawater pH is central to understanding the mechanisms via which ocean acidification (OA) affects coral calcification. We report here the results of an experiment comparing the responses of the coral Acropora yongei and Pocillopora damicornis to differing pH levels (8.09, 7.81, and 7.63) over an 8-week period. Calcification of A. youngei was reduced by 35% at pH 7.63, while calcification of P. damicornis was unaffected...
August 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28783188/a-review-of-flexible-lithium-sulfur-and-analogous-alkali-metal-chalcogen-rechargeable-batteries
#15
REVIEW
Hong-Jie Peng, Jia-Qi Huang, Qiang Zhang
Flexible energy storage systems are imperative for emerging flexible devices that are revolutionizing our life. Lithium-ion batteries, the current main power sources, are gradually approaching their theoretical limitation in terms of energy density. Therefore, alternative battery chemistries are urgently required for next-generation flexible power sources with high energy densities, low cost, and inherent safety. Flexible lithium-sulfur (Li-S) batteries and analogous flexible alkali metal-chalcogen batteries are of paramount interest owing to their high energy densities endowed by multielectron chemistry...
August 7, 2017: Chemical Society Reviews
https://www.readbyqxmd.com/read/28780875/preface-for-the-advances-in-main-group-inorganic-chemistry-forum
#16
Philip P Power, Ching-Wen Chiu
No abstract text is available yet for this article.
August 7, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28777567/inorganic-nanotubes-and-fullerene-like-nanoparticles-at-the-crossroads-between-solid-state-chemistry-and-nanotechnology
#17
Bojana Višić, Leela Srinivas Panchakarla, Reshef Tenne
Inorganic nanotubes (NTs) and fullerene-like nanoparticles (NPs) of WS2 were discovered some 25 years ago and are produced now on a commercial scale for various applications. This Perspective provides a brief description of recent progress in this scientific discipline. The conceptual evolution leading to the discovery of these NTs and NPs is briefly discussed. Subsequently, recent progress in the synthesis of such NPs from a variety of inorganic compounds with layered (2D) structure is described. In particular, we discuss the synthesis of NTs from chalcogenide- and oxide-based ternary misfit layered compounds, as well as their structure and different growth mechanisms...
August 24, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28771006/continuous-hydrothermal-synthesis-of-inorganic-nanoparticles-applications-and-future-directions
#18
Jawwad A Darr, Jingyi Zhang, Neel M Makwana, Xiaole Weng
Nanomaterials are at the leading edge of the emerging field of nanotechnology. Their unique and tunable size-dependent properties (in the range 1-100 nm) make these materials indispensable in many modern technological applications. In this Review, we summarize the state-of-art in the manufacture and applications of inorganic nanoparticles made using continuous hydrothermal flow synthesis (CHFS) processes. First, we introduce ideal requirements of any flow process for nanoceramics production, outline different approaches to CHFS, and introduce the pertinent properties of supercritical water and issues around mixing in flow, to generate nanoparticles...
September 13, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/28766633/structure-and-reactivities-of-rhenium-and-technetium-bis-arene-sandwich-complexes-m-%C3%AE-6-arene-2
#19
Giuseppe Meola, Henrik Braband, Sara Jordi, Thomas Fox, Olivier Blacque, Bernhard Spingler, Roger Alberto
Sandwich complexes are important building blocks in medicinal inorganic chemistry for group 6 and 8 elements but are almost unknown for the manganese triad. We present the syntheses and full characterization of the mixed-arene (99)Tc sandwich complexes [(99)Tc(η(6)-hmbz)(η(6)-C6H5-NH3)](PF6)2 and [(99)Tc(η(6)-hmbz)(η(6)-C6H5-Br)](PF6). Both comprise functionalities for conjugation to targeting molecules or for being included as substructures in pharmaceutically active lead compounds. Since η(6)-benzene ligands are too stably bound to be replaced with incoming ligands, we prepared naphthalene complexes [Re(η(6)-C6H6)(η(6)-napht)](+) and [Re(η(6)-napht)2](+)...
August 2, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28763123/laying-waste-to-mercury-inexpensive-sorbents-made-from-sulfur-and-recycled-cooking-oils
#20
Max J H Worthington, Renata L Kucera, Inês S Albuquerque, Christopher T Gibson, Alexander Sibley, Ashley D Slattery, Jonathan A Campbell, Salah F K Alboaiji, Katherine A Muller, Jason Young, Nick Adamson, Jason R Gascooke, Deshetti Jampaiah, Ylias M Sabri, Suresh K Bhargava, Samuel J Ippolito, David A Lewis, Jamie S Quinton, Amanda V Ellis, Alexander Johs, Gonçalo J L Bernardes, Justin M Chalker
Mercury pollution threatens the environment and human health across the globe. This neurotoxic substance is encountered in artisanal gold mining, coal combustion, oil and gas refining, waste incineration, chloralkali plant operation, metallurgy, and areas of agriculture in which mercury-rich fungicides are used. Thousands of tonnes of mercury are emitted annually through these activities. With the Minamata Convention on Mercury entering force this year, increasing regulation of mercury pollution is imminent...
August 1, 2017: Chemistry: a European Journal
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