scholarly journals Future prospects in boron chemistry: new boron compounds and Lewis acids for catalysis and materials science

2021 ◽  
Author(s):  
Guillaume Berionni
Keyword(s):  
Lewis Acids ◽  
Materials Science ◽  
Future Prospects ◽  
Boron Compounds ◽  
Boron Chemistry

scholarly journals Preface

2006 ◽  
Vol 78 (7) ◽  
pp. iv
Author(s):  
Yoshinori Yamamoto
Keyword(s):  
The United States ◽  
Molecular Structures ◽  
Synthetic Methods ◽  
International Meeting ◽  
Boron Compounds ◽  
Research Areas ◽  
Research Fields ◽  
Boron Chemistry ◽  
Poster Presentations ◽  
Oral Presentations

This volume summarizes the present status of research in the field of organic and inorganic boron chemistry, presented by the invited speakers at the 12th International Meeting on Boron Chemistry (IMEBORON-XII), held in Sendai, Japan, 11-15 September 2005. IMEBORON-XII consisted of 1 plenary lecture, 22 invited lectures, 24 keynote lectures, 48 short oral presentations, and 99 poster presentations. In all, 280 chemists contributed to a truly international meeting, with participants representing China, Czech Republic, Germany, Israel, Japan, Mexico, Poland, Russia, South Korea, Spain, Sweden, the United Kingdom, and the United States.The presentations at IMEBORON-XII covered all aspects of boron chemistry including theoretical studies, synthetic methods of organic and inorganic boron compounds, novel molecular structures, application of organic and inorganic boron compounds to organic synthesis as catalysts or as reagents, medicinal applications, and creation of new materials (liquid crystals, supramolecular clusters, nanocylinders, molecular electronic devices, nanomachines, ceramics, etc.). Not only the distinguished senior members of the boron community, but also young boron chemists took an active part in the conference. Not only traditional boron chemistry, but also new evolving research areas of boron chemistry were presented. Accordingly, I feel that a new generation of both researchers and research fields is coming in boron chemistry. A selection of the invited contributions to IMEBORON-XII is presented in the 14 papers in this issue.The importance of scientific exchange in this field was recognized during IMEBORON-XII. Therefore, the continuation of this series of conferences was discussed, and the venue for IMEBORON-XIII in 2008 will be organized by Prof. F. Teixidor at the Institut de Ciencia de Materials de Barcelona, C.S.I.S., Campus U.A.B., Ballaterra, Spain.Yoshinori YamamotoChairman of IMEBORON-XII

Nanostructured boron compounds for cancer therapy

2018 ◽  
Vol 90 (4) ◽  
pp. 653-663 ◽  
Author(s):  
Yinghuai Zhu ◽  
Narayan S. Hosmane
Keyword(s):  
Cancer Therapy ◽  
Chemical Properties ◽  
Slow Neutron ◽  
Nuclear Fission ◽  
Boron Compounds ◽  
Drug Detection ◽  
Boron Neutron Capture ◽  
Detection Technology ◽  
Boron Chemistry ◽  
Physical And Chemical

Abstract Nanostructured boron compounds have emerged as one of the promising frontiers in boron chemistry. These species possess unique physical and chemical properties in comparison with classical small boron compounds. The nanostructured boron composites generally have large amounts of boron contents and thus have the potential to deliver significant amount of boron to the tumor cells, that is crucial for boron neutron capture therapy (BNCT). In theory, BNCT is based on a nuclear capture reaction with the 10B isotope absorbing a slow neutron to initiate a nuclear fission reaction with the release of energetic particles, such as lithium and helium (α particles), which travel the distance of around nine microns within the cell DNA or RNA to destroy it. The recent studies have demonstrated that the nanostructured boron composites can be combined with the advanced targeted drug delivery system and drug detection technology. The successful combination of these three areas should significantly improve the BNCT in cancer treatment. This mini review summarizes the latest developments in this unique area of cancer therapy.

Mechanisms for Flame Retardancy and Smoke suppression -A Review

1996 ◽  
Vol 14 (6) ◽  
pp. 426-442 ◽  
Author(s):  
Joseph Green
Keyword(s):  
Chemical Composition ◽  
Flame Retardancy ◽  
Lewis Acids ◽  
Convincing Evidence ◽  
Zinc Borate ◽  
Large Concentration ◽  
Boron Compounds ◽  
Tin Compounds ◽  
Salts Of Organic Acids

The prevailing mechanisms for halogen and phosphorus flame retardancy are reviewed. Halogens act in the vapor phase and phosphorus can act in either the vapor or condensed phase depending on the specific phos phorus compound and the chemical composition of the polymer. Halogen- antimony synergy is discussed. Convincing evidence is presented for bromine- phosphorus synergy in specific polymers. The mode of decomposition of polycarbonate is shown and the effect of salts of organic acids in changing the mode of decomposition hence producing a more flame resistant polymer is shown. Intumescence in polyolefins is discussed. Inorganic metal hydrates used in large concentration cool by endothermically releasing a large concentration of water. The effect of boron compounds is discussed. Methods of smoke suppres sion are presented as is the role of zinc borate, molybdenum and tin compounds acting as Lewis acids in PVC.

Boron halide chelate compounds and their activity towards the demethylation of trimethylphosphate

2002 ◽  
Vol 80 (11) ◽  
pp. 1463-1468 ◽  
Author(s):  
Timothy S Keizer ◽  
Lauren J De Pue ◽  
Sean Parkin ◽  
David A Atwood
Keyword(s):  
Elemental Analysis ◽  
Lewis Acids ◽  
Boron Compound ◽  
Boron Compounds ◽  
X Ray ◽  
Tert Butyl ◽  
New Type ◽  
Chelate Compounds

Salen(t-Bu)H2 (N,N'-ethylenebis(3,5-di-tert-butyl(2-hydroxy)benzylidenimine) and its derivatives were used to prepare boron compounds having the formula L(BCl2)2 (L = salen(t-Bu) (1), salpen(t-Bu) (2), salben(t-Bu) (3), salpten(t-Bu) (4), salhen(t-Bu) (5)). These are formed from the reaction of the corresponding L[B(OMe)2]2 with BCl3. In addition to being a new type of boron compound, they are also potential two-point Lewis acids. Indeed, they demonstrate Lewis acidic behavior in the dealkylation of trimethylphosphate. All of the compounds were characterized by mp, elemental analysis, 1H and 11B NMR, IR, MS, and in the case of 2 by X-ray crystallography.Key words: boron, salen, dealkylation.

scholarly journals N-Heterocyclic Carbene Adducts of Alkynyl Functionalized 1,3,2-Dithioborolanes

Molecules ◽  
2019 ◽  
Vol 24 (9) ◽  
pp. 1690 ◽  
Author(s):  
Richard Böser ◽  
Lars Denker ◽  
René Frank
Keyword(s):  
Boron Atom ◽  
Good Yield ◽  
Optical Materials ◽  
Medicinal Chemistry ◽  
Materials Science ◽  
Building Blocks ◽  
Boron Compounds ◽  
Boronate Esters ◽  
Chelate Effect ◽  
Post Functionalization

Alkynyl functionalized boron compounds are versatile intermediates in the areas of medicinal chemistry, materials science, and optical materials. In particular, alkynyl boronate esters [R1−C≡C−B(OR2)2] are of interest since they provide reactivity at both the alkyne entity, with retention of the B−C bond or alkyne transfer to electrophilic substrates with scission of the latter. The boron atom is commonly well stabilized due to (i) the extraordinary strength of two B−O bonds, and (ii) the chelate effect exerted by a bifunctional alcohol. We reasoned that the replacement of a B−O for a B−S bond would lead to higher reactivity and post-functionalization in the resulting alkynyl boronate thioesters [R1−C≡C−B(S2X)]. Access to this poorly investigated class of compounds starts form chloro dithioborolane cyclo-Cl−B(S2C2H4) as a representative example. Whereas syntheses of three coordinate alkynyl boronate thioesters [R1−C≡C−B(S2X)] proved to be ineffective, the reactions of NHC-adducts (NHC = N-heterocyclic carbene) of cyclo-Cl-B(S2C2H4) afforded the alkyne substituted thioboronate esters in good yield. The products NHC−B(S2C2H4)(C≡C-R1) are remarkably stable towards water and air, which suggests their use as boron-based building blocks for applications akin to oxygen-based boronate esters.

Tripping the Light Fantastic: Organoboron Compounds

Elements ◽  
2017 ◽  
Vol 13 (4) ◽  
pp. 255-260
Author(s):  
Penelope J. Brothers
Keyword(s):  
Energy Transfer ◽  
Small Molecules ◽  
Materials Science ◽  
Chemical Reactivity ◽  
New Materials ◽  
Boron Compounds ◽  
Energy Medicine ◽  
Wide Range ◽  
Fluorescent Tags ◽  
Transfer Properties

Small molecules containing boron can play all sorts of roles in chemistry, biology and materials science. Molecular boron compounds display a wide range of unusual and fascinating structures, and their chemical reactivity can be very different from that of boron's next-door neighbour carbon. Some of the reasons for this will be considered and illustrated through applications in energy, medicine and new materials. The boron dipyrrins, also known as BODIPYs, are a prime example. They are strongly fluorescent when excited by illumination and are widely used as fluorescent tags in biology and as biosensors. More recently, they have been studied for their energy transfer properties in light-harvesting applications.

scholarly journals Semiconductor core fibres: materials science in a bottle

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Ursula J. Gibson ◽  
Lei Wei ◽  
John Ballato
Keyword(s):  
Nonlinear Response ◽  
Materials Science ◽  
Electronic Device ◽  
Future Prospects ◽  
Post Processing ◽  
The Core ◽  
Crystalline Core ◽  
Wide Range ◽  
Device Applications ◽  
Processing Techniques

AbstractNovel core fibers have a wide range of applications in optics, as sources, detectors and nonlinear response media. Optoelectronic, and even electronic device applications are now possible, due to the introduction of methods for drawing fibres with a semiconductor core. This review examines progress in the development of glass-clad, crystalline core fibres, with an emphasis on semiconducting cores. The underlying materials science and the importance of post-processing techniques for recrystallization and purification are examined, with achievements and future prospects tied to the phase diagrams of the core materials.

Trends in Electron Energy Loss Spectroscopy

1977 ◽  
Vol 35 ◽  
pp. 228-229
Author(s):  
C. Colliex ◽  
P. Trebbia
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Electron Energy Loss Spectroscopy ◽  
Materials Science ◽  
Analytical Technique ◽  
Recent Developments ◽  
Quantitative Results ◽  
Electron Microscopes ◽  
Electron Energy Loss ◽  
Primary Electrons

The physical foundations for the use of electron energy loss spectroscopy towards analytical purposes, seem now rather well established and have been extensively discussed through recent publications. In this brief review we intend only to mention most recent developments in this field, which became available to our knowledge. We derive also some lines of discussion to define more clearly the limits of this analytical technique in materials science problems.The spectral information carried in both low ( 0<ΔE<100eV ) and high ( >100eV ) energy regions of the loss spectrum, is capable to provide quantitative results. Spectrometers have therefore been designed to work with all kinds of electron microscopes and to cover large energy ranges for the detection of inelastically scattered electrons (for instance the L-edge of molybdenum at 2500eV has been measured by van Zuylen with primary electrons of 80 kV). It is rather easy to fix a post-specimen magnetic optics on a STEM, but Crewe has recently underlined that great care should be devoted to optimize the collecting power and the energy resolution of the whole system.

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