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ISBN: 9789568416799 Year: Pages: 306 Language: Spanish
Publisher: Ariadna Ediciones
Subject: Social Sciences
Added to DOAB on : 2020-01-28 11:21:02
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Historical and political analysis of the Chilean cycle 1968-1988, an era that marked the outstanding of contemporary Chilean society

Synthesis and Applications of New Spin Crossover Compounds

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ISBN: 9783039213610 9783039213627 Year: Pages: 254 DOI: 10.3390/books978-3-03921-362-7 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Physics (General)
Added to DOAB on : 2019-12-09 11:49:15
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The crystal chemistry of spin crossover (SCO) behavior in coordination compounds can potentially be in association with smart materials—promising materials for applications as components of memory devices, displays, sensors and mechanical devices and, especially, actuators, such as artificial muscles. This Special Issue is devoted to various aspects of SCO and related research, comprising 18 interesting original papers on valuable and important SCO topics. Significant and fundamental scientific attention has been focused on the SCO phenomena in a wide research range of fields of fundamental chemical and physical and related sciences, containing the interdisciplinary regions of chemical and physical sciences related to the SCO phenomena. Coordination materials with bistable systems between the LS and the HS states are usually triggered by external stimuli, such as temperature, light, pressure, guest molecule inclusion, soft X-ray, and nuclear decay. Since the first Hofmann-like spin crossover (SCO) behavior in {Fe(py)2[Ni(CN)4]}n (py = pyridine) was demonstrated, this crystal chemistry motif has been frequently used to design Fe(II) SCO materials to enable determination of the correlations between structural features and magnetic properties.

Keywords

spin crossover --- spin transition --- cobalt(II) ion --- paramagnetic ligand --- aminoxyl --- switch --- mosaicity --- spin crossover --- X-ray diffraction --- fatigability --- single crystal --- phase transition --- structural disorder --- spin-crossover --- dinuclear triple helicate --- Fe(II) --- solvent effects --- metal dithiolene complexes --- [Au(dmit)2]?, [Au(dddt)2]? --- ion-pair crystals --- [Fe(III)(3-OMesal2-trien)]+ --- coordination complexes --- crystal structure --- magnetic properties --- magnetic susceptibility --- magnetization --- spin-crossover transition --- Fe(II) complex --- dipyridyl-N-alkylamine ligands --- high spin (HS) --- low spin (LS) --- spin cross-over (SCO) --- magnetic transition --- cobalt oxide --- spin polaron --- impurity effect --- spin-state crossover --- coordination polymer --- supramolecular isomerism --- spin crossover --- crystal engineering --- spin crossover --- X-ray absorption spectroscopy --- soft X-ray induced excited spin state trapping --- high spin --- spin-crossover --- LIESST effect --- hydrogen bonding --- ?-? interactions --- charge-transfer phase transition --- iron mixed-valence complex --- hetero metal complex --- dithiooxalato ligand --- substitution of 3d transition metal ion --- ferromagnetism --- dielectric response --- 57Fe Mössbauer spectroscopy --- Fe(III) coordination complexes --- hexadentate ligand --- Schiff base --- spin crossover --- UV-Vis spectroscopy --- SQUID --- EPR spectroscopy --- spin-crossover --- optical microscopy --- reaction diffusion --- spin crossover --- Fe(III) complex --- qsal ligand --- thermal hysteresis --- structure phase transition --- counter-anion --- solvate --- lattice energy --- optical conductivity spectrum --- spiral structure --- 1,2-bis(4-pyridyl)ethane --- supramolecular coordination polymer --- chiral propeller structure --- atropisomerism --- spin crossover --- iron(II) complexes --- C–H···? interactions --- magnetic properties --- thermochromism --- spin crossover --- linear pentadentate ligand --- iron(II) --- mononuclear --- 1,2,3-triazole --- crystal structure --- magnetic properties --- DFT calculation --- intermolecular interactions --- amorphous --- spin crossover --- Cu(II) complexes --- nitroxides --- phase transitions --- magnetostructural correlations --- iron (II), spin crossover --- X-ray diffraction --- coordination polymers --- n/a

Graphene and Other 2D Layered Nanomaterial-Based Films: Synthesis, Properties and Applications

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ISBN: 9783039219025 9783039219032 Year: Pages: 138 DOI: 10.3390/books978-3-03921-903-2 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Chemistry (General) --- Organic Chemistry
Added to DOAB on : 2020-01-07 09:08:26
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This book is dedicated to highlighting some relevant advances in the field of thin films and coatings based on two-dimensional crystals and layered nanomaterials. Due to their layered structure, graphene and a variety of new 2D inorganic nanosystems, called “graphene analogues”, have all attracted tremendous interest due to their unprecedented properties/superior performance, and may find applications in many fields from electronics to biotechnology. These two-dimensional systems are ultrathin and, hence, tend to be flexible, also presenting distinctive and nearly intrinsic characteristics, including electronic, magnetic, optical, thermal conductivity, and superconducting properties. Furthermore, the combination of different structures and synergetic effects may open new and unprecedented perspectives, making these ideal advanced materials for multifunctional assembled systems. As far as the field of coatings is concerned, new layered nanostructures may offer unique and multifunctional properties, including gas barrier, lubricant, conductive, magnetic, photoactive, self-cleaning, and/or antimicrobial surfaces. This book contains new findings on the synthesis and perspectives of multifunctional films that are at the forefront of the science and coating technologies.

Advancements in Gel Science—A Special Issue in Memory of Toyoichi Tanaka

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ISBN: 9783039213436 9783039213443 Year: Pages: 178 DOI: 10.3390/books978-3-03921-344-3 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- Chemical Technology
Added to DOAB on : 2019-12-09 11:49:15
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A gel is a state of matter that consists of a three-dimensional cross-linked polymer network and a large amount of solvent. Because of their structural characteristics, gels play important roles in science and technology. The science of gels has attracted much attention since the discovery of the volume phase transition by Professor Toyoichi Tanala at MIT in 1978. MDPI planned to publish a Special Issue in Gels to celebrate the 40th anniversary of this discovery, which received submissions of 13 original papers and one review from various areas of science. We believe that readers will find this Special Issue informative as to the recent advancements of gel research and the broad background of gel science.

Keywords

gel --- thermoresponsive property --- monomer sequence --- co-crosslinking --- copolymerization --- acrylamide derivative --- swelling --- volume phase transition --- agarose gel --- compression --- solvent transport --- sucrose --- xylitol --- volume phase transition --- effects of electric charge --- swelling of thermosensitive gels --- sol-gel transition --- site-bond correlated-percolation model for polymer gelation --- gelation temperature --- cloud point temperature --- spinodal temperature --- spinodal decomposition --- janus particle --- anisotropic shape --- phase separation --- wetting --- micrometric confinement --- micropipette aspiration --- PVA gel --- gamma ray sterilization --- artificial hydrogel cartilage --- frictional property --- wear --- xerogel --- Brunauer-Emmett-Teller theory --- Barrett-Joyner-Halenda analysis --- temperature --- solids content --- drying --- solvent exchange --- microgel --- electrophoresis --- light scattering --- paint coating --- wrinkle --- swelling --- buckling --- Sephadex® (crosslinked dextran) --- crosslink density (density of crosslinks) --- ice grain --- ice crystallization during rewarming --- glassy water --- X-ray CT --- XRD --- poly(vinyl alcohol) --- chemical gel --- microcrystallite --- hydrogen bond --- swelling behavior --- hysteresis --- hydrogel --- friction --- fatigue --- wear --- fracture --- crack --- adhesion --- delamination --- poly (acryl amide) gel --- time domain reflectometry (TDR) of dielectric spectroscopy --- pulse field gradient spin echo method of nuclear magnetic resonance (PFG-NMR) --- scaling analysis --- fractal analysis --- heterogeneous gelation dynamics --- moving boundary picture --- phase transition dynamics --- kinetic coefficient --- blood coagulation --- n/a

Scenarios and Indicators for Sustainable Development–Towards A Critical Assessment of Achievements and Challenges

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ISBN: 9783038976721 Year: Pages: 180 DOI: 10.3390/books978-3-03897-673-8 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Economics
Added to DOAB on : 2019-03-21 15:50:41
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Globalization and telecoupling are enhancing the complexity of the coupled socio-ecological system constituted by the interaction between the global ecosphere and the anthroposphere. As a result, the demand for tools to identify transformative innovations, assess future risks, and support precautionary decisions for sustainability is growing by the day in business and politics. Scenarios are a means of simplification, reducing the real-world complexity to a limited number of essential factors to analyze their interactions and support policy formulation, with indicators as communication and monitoring tools. In particular, in a time of fake news and alternative truths a critical reflection amongst producers and users of scenarios and indicators is overdue; the capability for critical self-reflection is what distinguishes science from pseudo-science, and is a condition of trust. The authors of this book test established measurement and modeling approaches against new challenges, assess the weaknesses of prevailing innovation theories and the political-ideological embedment of archetypical scenarios, highlight deficits in taking the physical basics into account, and the need to understand global interaction and the stepwise process of energy transitions, point out technical as well as conceptual weaknesses in data collection, harmonization and indicator generation, always with a view to solving problems.

Molecular Magnets

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ISBN: 9783038977100 Year: Pages: 166 DOI: 10.3390/books978-3-03897-711-7 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Chemistry (General)
Added to DOAB on : 2019-03-21 14:08:22
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Molecular magnets show many properties not met in conventional metallic magnetic materials, i.e. low density, transparency to electromagnetic radiation, sensitivity to external stimuli such as light, pressure, temperature, chemical modification or magnetic/electric fields, and others. They can serve as “functional” materials in sensors of different types or be applied in high-density magnetic storage or nanoscale devices. Research into molecule-based materials became more intense at the end of the 20th century and is now an important branch of modern science. The articles in this Special Issue, written by physicists and chemists, reflect the current work on molecular magnets being carried out in several research centers. Theoretical papers in the issue concern the influence of spin anisotropy in the low dimensional lattice of the resulting type of magnet, as well as thermodynamics and magnetic excitations in spin trimers. The impact of external pressure on structural and magnetic properties and its underlying mechanisms is described using the example of Prussian blue analogue data. The other functionality discussed is the magnetocaloric effect, investigated in coordination polymers and high spin clusters. In this issue, new molecular magnets are presented: (i) ferromagnetic high-spin [Mn6] single-molecule magnets, (ii) solvatomagnetic compounds changing their structure and magnetism dependent on water content, and (iii) a family of purely organic magnetic materials. Finally, an advanced calorimetric study of anisotropy in magnetic molecular superconductors is reviewed.

Open Access and the Library

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ISBN: 9783038977407 Year: Pages: 142 DOI: 10.3390/books978-3-03897-741-4 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Media and communication
Added to DOAB on : 2019-04-05 10:34:31
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Libraries are places of learning and knowledge creation. Over the last two decades, digital technology—and the changes that came with it—have accelerated this transformation to a point where evolution starts to become a revolution.The wider Open Science movement, and Open Access in particular, is one of these changes and is already having a profound impact. Under the subscription model, the role of libraries was to buy or license content on behalf of their users and then act as gatekeepers to regulate access on behalf of rights holders. In a world where all research is open, the role of the library is shifting from licensing and disseminating to facilitating and supporting the publishing process itself.This requires a fundamental shift in terms of structures, tasks, and skills. It also changes the idea of a library’s collection. Under the subscription model, contemporary collections largely equal content bought from publishers. Under an open model, the collection is more likely to be the content created by the users of the library (researchers, staff, students, etc.), content that is now curated by the library.Instead of selecting external content, libraries have to understand the content created by their own users and help them to make it publicly available—be it through a local repository, payment of article processing charges, or through advice and guidance. Arguably, this is an overly simplified model that leaves aside special collections and other areas. Even so, it highlights the changes that research libraries are undergoing, changes that are likely to accelerate as a result of initiatives such as Plan S.This Special Issue investigates some of the changes in today’s library services that relate to open access.

Solid Catalysts for the Upgrading of Renewable Sources

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ISBN: 9783038975724 Year: Pages: 226 DOI: 10.3390/books978-3-03897-573-1 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Chemistry (General) --- Science (General)
Added to DOAB on : 2019-04-05 11:07:22
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The use of solid catalysts for the upgrade of renewable sources gives the opportunity to combine the two main cores of green chemistry, that is, on the one hand, the set-up of sustainable processes and, on the other, the use of biomass-derived materials. Solid catalysts have taken on a leading role in traditional petrochemical processes and could represent a key tool in new biorefinery-driven technologies.

Alternative Assets and Cryptocurrencies

ISBN: 9783038979784 9783038979791 Year: Pages: 218 DOI: 10.3390/books978-3-03897-979-1 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Business and Management
Added to DOAB on : 2019-08-28 11:21:27
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Alternative assets such as fine art, wine, or diamonds have become popular investment vehicles in the aftermath of the global financial crisis. Correlation with classical financial markets is typically low, such that diversification benefits arise for portfolio allocation and risk management. Cryptocurrencies share many alternative asset features, but are hampered by high volatility, sluggish commercial acceptance, and regulatory uncertainties. This collection of papers addresses alternative assets and cryptocurrencies from economic, financial, statistical, and technical points of view. It gives an overview of their current state and explores their properties and prospects using innovative approaches and methodologies.

Advanced Applications for Smart Energy Systems Considering Grid-Interactive Demand Response

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ISBN: 9783039219988 9783039219995 Year: Pages: 152 DOI: 10.3390/books978-3-03921-999-5 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: General and Civil Engineering --- Technology (General)
Added to DOAB on : 2020-01-07 09:08:26
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This book covers applied research on smart energy systems, smart grids, smart energy homes, smart energy products and services, and the advanced applications thereof, in the context of demand response and grid interactions. In particular, this book is focused on interdisciplinary research results that combine technical, social, environmental, and economic aspects of smart energy systems and smart energy products. Moreover, several chapters are based on the evaluation of real life cases, energy pilots, prototypes of smart energy products, and end user surveys and interviews.

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