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Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]

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https://www.readbyqxmd.com/read/29701324/the-hydrolysis-of-aln-powder-a-powerful-tool-in-advanced-materials-engineering
#1
REVIEW
Andraž Kocjan
The tendency for aluminium nitride (AlN) powder to undergo hydrolysis, which can lead to a complete degradation of the material, is unique in metal nitrides. Although this form of hydrolysis has been known for a long time, it is generally considered as a nuisance, because it prevents the aqueous powder processing of AlN-based ceramics. However, careful investigations of the course of hydrolysis, the reaction kinetics and the evolution of aluminium hydroxides have uncovered exceptional possibilities for the exploitation of this naturally driven process in the area of advanced materials engineering...
April 27, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29688632/responsive-and-adaptive-micro-wrinkles-on-organic-inorganic-hybrid-materials
#2
REVIEW
Masahide Takahashi
A buckling induced wrinkling is a general phenomenon in daily life, which is induced by mechanical instability at the interface of multi-layered systems. Variety of applications have been proposed for wrinkles in nano to micrometer periodicity on the surface of soft materials. In recent decades, researchers are trying to use wrinkles for variety of sophisticated applications such as micro pattern fabrication, control of wettability, templating/directing substrate for elongated nano materials or virus, size-selective adsorption/desorption of functional objects, cells or microorganisms, delamination induced material fabrication such as micro-rolls, substrates for stretchable electronics, valves for microfluidic devices and soft actuators...
April 24, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29688611/the-impact-of-microwaves-on-organophosphorus-chemistry
#3
REVIEW
György Keglevich
A personal account on the pioneering results on microwave (MW)-assisted organophosphorus syntheses obtained in the last decade is presented. The broad spectrum of the reactions studied exemplifies the advantages of the MW technique as a green tool regarding efficiency and the simplification of catalyst systems. Theoretical calculations for a few typical models helped us to explore the scope and limitations of the application of MW irradiation.
April 24, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29673057/carbon-nanomaterials-in-direct-liquid-fuel-cells
#4
REVIEW
Huayun Du, Cindy Xinxin Zhao, Jing Lin, Jiang Guo, Bin Wang, Zhen Hu, Qian Shao, Duo Pan, Evan K Wujcik, Zhanhu Guo
Fuel cells have attracted more attentions due to many advantages they can provide, including high energy efficiency and low environmental burden. To form a stable, low cost and efficient catalyst, we presented here the state of the art of electrocatalyst fabrication approaches, involving carbon nanotubes and their multifunctional nanocomposites incorporated with noble metals, such as Pt, Pd, Au, their binary and ternary systems. Both fuel oxidation reactions and oxygen reduction reactions were emphasized with comprehensive examples and future prospects...
April 19, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29667300/%C3%AE-electrophilic-reactivity-of-nitronates
#5
REVIEW
A A Tabolin, A Yu Sukhorukov, S L Ioffe
Chemistry of covalent nitronates regarding nucleophilic addition to C=N bond is described. Various types of electrophilic activation of nitronates and stability of formed products are discussed with main attention paid to authors' work in the area.
April 18, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29665280/chemistry-of-cyanide-adducts-of-aldimines-from-aniline-derivatives
#6
REVIEW
Eunjoon Park, Jiye Jeon, Cheol-Hong Cheon
The chemistry of hydrogen cyanide adducts of imines is well-developed, but that of cyanide adducts remains unexplored. This is presumably because these cyanide adducts are not stable and thus not readily available in their isolated forms. In this personal account, we present the progress made in our research program towards the development of novel organic transformations utilizing cyanide adducts of imines as key intermediates. We also report the application of these methodologies to the total synthesis of natural products including indole alkaloids...
April 17, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29665254/designing-liquid-crystalline-oligomers-to-exhibit-twist-bend-modulated-nematic-phases
#7
REVIEW
Richard J Mandle
Arguably the most active area in liquid crystal research presently, the twist-bend modulated nematic phase (TB) exhibits a nanoscale helical structure and therefore exhibits bulk chirality despite being formed of typically achiral materials. After a short introduction we address the structure-property relationship that exists for this unique mesophase before introducing recent advances in strategies employed to prepare oligomeric materials that exhibit this state of matter. These methods afford fine control over the molecular substructure and potentially over the nanostructure of the exhibited mesophases...
April 17, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29573321/from-solute-fluidic-and-particulate-precursors-to-complex-organizations-of-matter
#8
REVIEW
Ashit Rao, Helmut Cölfen
The organization of matter from its constitutive units recruits intermediate states with distinctive degrees of self-association and molecular order. Existing as clusters, droplets, gels as well as amorphous and crystalline nanoparticles, these precursor forms have fundamental contributions towards the composition and structure of inorganic and organic architectures. In this personal account, we show that the transitions from atoms, molecules or ionic species to superstructures of higher order are intertwined with the interfaces and interactions of precursor and intermediate states...
March 24, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29543373/development-of-functional-bionanocomposites-using-cyanobacterial-polysaccharides
#9
REVIEW
Maiko K Okajima, Saranyoo Sornkamnerd, Tatsuo Kaneko
Cyanobacteria are regarded as very eco-friendly microreactors for the production of various biomolecules such as polysaccharides by fixing not only carbon but also nitrogen in water. Cyanobacterial polysaccharides having various functional groups such as hydroxyls, carboxyls, sulfates, etc. have the ability to interact with metals or inorganics, to create bionanocomposites. Sacran, a supergiant cyanobacterial anionic polysaccharide extracted from the extracellular matrix of Aphanothece sacrum which is mass-cultivated in freshwater, is mainly used to create functional bionanocomposites...
March 15, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29537731/a-review-on-recent-advances-in-the-application-of-nanocatalysts-in-a-3-coupling-reactions
#10
REVIEW
Mahmoud Nasrollahzadeh, Mohaddeseh Sajjadi, Fatemeh Ghorbannezhad, S Mohammad Sajadi
A3 coupling is one of the few transition-metal catalyzed carbon-carbon bond forming reactions that have been established as a most direct, efficient and atom-economical synthetic approach to afford propargylamine derivatives using various catalysts. A large number of nanosized heterogeneous catalysts for three-component coupling reactions between an aldehyde, an amine, and a terminal alkyne have been popularly introduced as an A3 coupling in the last decade. The coupling product has found a broad application as a key intermediate for a variety of heterocyclic useful compounds and numerous biologically active molecules such as β-lactams, conformationally restricted peptides, isosteres, herbicides, fungicides, indolizines, pyrroles, quinolines and therapeutic drug molecules...
March 14, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29537725/sol-gel-chemistry-for-carbon-dots
#11
REVIEW
Luca Malfatti, Plinio Innocenzi
Carbon dots are an emerging class of carbon-based nanostructures produced by low-cost raw materials which exhibit a widely-tunable photoluminescence and a high quantum yield. The potential of these nanomaterials as a substitute of semiconductor quantum dots in optoelectronics and biomedicine is very high, however they need a customized chemistry to be integrated in host-guest systems or functionalized in core-shell structures. This review is focused on recent advances of the sol-gel chemistry applied to the C-dots technology...
March 14, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29537696/tio-2-nanostructures-as-anode-materials-for-li-na-ion-batteries
#12
REVIEW
Maria B Vazquez-Santos, Pedro Tartaj, Enrique Morales, Jose Manuel Amarilla
Here we summarize some results on the use of TiO2 nanostructures as anode materials for more efficient Li-ion (LIBs) and Na-ion (NIBs) batteries. LIBs are the leader to power portable electronic devices, and represent in the short-term the most adequate technology to power electrical vehicles, while NIBs hold promise for large storage of energy generated from renewable sources. Specifically, TiO2 an abundant, low cost, chemically stable and environmentally safe oxide represents in LIBs an alternative to graphite for applications in which safety is mandatory...
March 14, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29517856/interactions-between-biological-cells-and-layered-double-hydroxides-towards-functional-materials
#13
REVIEW
Claude Forano, Felipe Bruna, Christine Mousty, Vanessa Prevot
This review highlights the current research on the interactions between biological cells and Layered Double Hydroxides (LDH). The as-prepared biohybrid materials appear extremely attractive in diverse fields of application relating to health care, environment and energy production. We describe how thanks to the main features of biological cells and LDH layers, various strategies of assemblies can be carried out for constructing smart biofunctional materials. The interactions between the two components are described with a peculiar attention to the adsorption, biocompatibilization, LDH layer internalization, antifouling and antimicrobial properties...
March 8, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29517853/tailoring-functional-chitosan-based-composites-for-food-applications
#14
REVIEW
Cláudia Nunes, Manuel A Coimbra, Paula Ferreira
Chitosan-based functional materials are emerging for food applications. The covalent bonding of molecular entities demonstrates to enhance resistance to the typical acidity of food assigning mechanical and moisture/gas barrier properties. Moreover, the grafting to chitosan of some functional molecules, like phenolic compounds or essential oils, gives antioxidant, antimicrobial, among others properties to chitosan. The addition of nanofillers to chitosan and other biopolymers improves the already mentioned required properties for food applications and can attribute electrical conductivity and magnetic properties for active and intelligent packaging...
March 8, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29517841/transition-metal-catalyzed-dicarbofunctionalization-of-unactivated-olefins
#15
REVIEW
Roshan K Dhungana, Shekhar Kc, Prakash Basnet, Ramesh Giri
Transition metal (TM)-catalyzed difunctionalization of unactivated olefins with two carbon-based entities is a powerful method to construct complex molecular architectures rapidly from simple and readily available feedstock chemicals. While dicarbofunctionalization of unactivated olefins has a long history typically with the use of either carbon monoxide to intercept C(sp3 )-[M] (alkyl-TM) species or substrates lacking in β-hydrogen (β-Hs), development of this class of reaction still remains seriously limited due to complications of β-H elimination arising from the in situ-generated C(sp3 )-[M] intermediates...
March 8, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29513383/combination-of-tetrabutylammonium-iodide-tbai-with-tert-butyl-hydroperoxide-tbhp-an-efficient-transition-metal-free-system-to-construct-various-chemical-bonds
#16
REVIEW
Rongxiang Chen, Jijun Chen, Jie Zhang, Xiaobing Wan
In this account, we describe our recent progress on transition-metal-free-catalyzed cross-coupling reactions using tetrabutylammonium iodide (TBAI) as the catalyst and tert-butyl hydroperoxide (TBHP) as the oxidant. A rich variety of important organic compounds including α-acyloxy ethers, tert-butyl peresters, allylic esters, amides, α-amino nitriles, fully substituted pyrazoles, N-sulfonyl formamidines, α-amino acid esters, cyanomethyl esters, N-nitrosamines, and 3-acyloxy-2,3-dihydrobenzofurans have been successfully achieved in high chemoselectivity...
March 7, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29505112/hybrid-interfaces-in-molecular-spintronics
#17
REVIEW
Alicia Forment-Aliaga, Eugenio Coronado
Molecular/inorganic multilayer heterostructures are gaining attention in molecular electronics and more recently in new generation spintronic devices. The intrinsic properties of molecular materials as low cost, tuneability, or long spin lifetimes were the original reasons behind their implementation. However, the non-innocent role played by these hybrid interfaces is a determinant factor in the device performance. In this account we will give an overview about different types of hybrid molecular system/ferromagnet interfaces, which can be of direct application in molecular spintronics...
March 5, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29493879/immobilization-of-nanoparticles-on-fibrous-clay-surfaces-towards-promising-nanoplatforms-for-advanced-functional-applications
#18
REVIEW
Pilar Aranda, Eduardo Ruiz-Hitzky
This account discusses on diverse general approaches employed for the preparation of heterostructured materials based on the immobilization of metal oxides and other nanoparticles on sepiolite and palygorskite fibrous clay minerals, showing the many opportunities of application offered by the resulting materials. Various examples from our own experience have been selected to show how sepiolite acts as a convenient nanoplatform for immobilization of diverse type of nanoparticles, such as TiO2 , Fe3 O4 , Prussian blue, zeolites, layered double hydroxides, carbon nanotubes and graphenes, etc...
March 1, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29493872/designing-nanoparticles-and-nanoalloys-with-controlled-surface-and-reactivity
#19
REVIEW
Sophie Carenco
Designing well-defined nanoparticles and nanoalloys is a tremendous way to achieve in-depth understanding of their intrinsic properties. In particular, structure and composition of the core and the surface of nanoalloys can be investigated by a combination of state-of-the-art in situ microscopy and spectroscopy. These nanoalloys represent a playground to establish structure-properties relationships within the nano-matter. They provide a much needed understanding of the distribution of each element within the nanoparticles, depending on the environment (gaseous atmosphere, temperature, etc...
March 1, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/29488685/modified-synthesis-strategies-for-the-stabilization-of-low-n-ti-n-o-2n-1-magn%C3%A3-li-phases
#20
REVIEW
A Azor-Lafarga, L Ruiz-González, M Parras, D Portehault, C Sanchez, J M González-Calbet
Titanium reduced oxides TiO2-x occupy, since long time, a prominent place on the landscape of binary metal oxides because of their intriguing ability to form extended defects that affect both the formation of new superlattices and different electronic behaviours. Related to these features, a wide range of practical applications has been achieved. Moved by the conviction of the great potential of understanding the influence of the reactivity, compositional variations and size effects on their functional properties, the aim of this personal account is the optimization of a recently developed strategy for the stabilization of low n Tin O2n-1 terms...
February 28, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
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