Themed collection FOCUS: Frontiers in Boron Chemistry

42 items
Review Article

Recent advances and prospects for organoboron-based thermally activated delayed fluorescence emitters

The recent research progress of organic boron-containing thermally activated delayed fluorescence (TADF) materials is reviewed systematically with a focus on the molecular design, photophysical properties and performance of the corresponding OLEDs.

Graphical abstract: Recent advances and prospects for organoboron-based thermally activated delayed fluorescence emitters
From the themed collection: FOCUS: Light-emitting diodes technology
Review Article

Recent advances in the chemistry of α-oxylboronate reagents

The synthesis and transformation of α-oxylboronates including their C–B bond and C–O bond functionalizations are reviewed.

Graphical abstract: Recent advances in the chemistry of α-oxylboronate reagents
Review Article

Electrochemical synthesis and transformation of organoboron compounds

This review highlights the recent advances in both electrochemical borylation and hydroboration to synthesize organoboron compounds and electrochemical transformation of organoboron compounds to construct carbon–carbon and carbon–heteroatom bonds.

Graphical abstract: Electrochemical synthesis and transformation of organoboron compounds
From the themed collection: 2023 Organic Chemistry Frontiers HOT articles
Review Article

Self-healing polymer design from dynamic B–O bonds to their emerging applications

In this review, the most recent development in healable polymers with dynamic B–O links is discussed, taking readers through the concept and features of dynamic B–O linkages to explore their advanced functionalities and emerging applications.

Graphical abstract: Self-healing polymer design from dynamic B–O bonds to their emerging applications
Review Article

Triangularly shaped cyclic defects for the selective boron doping of π-extended systems

Entrapment of boron(III) in π-conjugated systems causes a strong modification of the observed properties, e.g. optical properties can be realized via post-synthetic reaction with 6.6.6 and 7.6.6 defects precisely incorporated into π-extended motifs.

Graphical abstract: Triangularly shaped cyclic defects for the selective boron doping of π-extended systems
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Synthesis of (Z)-alkenyl boronates via a copper(I)-catalyzed linear-selective alkylboration of terminal allenes

A copper(I)-catalyzed intermolecular alkylboration of terminal allenes using unactivated alkyl iodides as the carbon electrophiles is reported.

Graphical abstract: Synthesis of (Z)-alkenyl boronates via a copper(i)-catalyzed linear-selective alkylboration of terminal allenes
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Copper-catalyzed Markovnikov hydroboration of aliphatic terminal alkenes using carbonyl as a weak directing group

A copper-catalyzed hydroboration of unactivated alkenes using carbonyl as a weak directing group was disclosed with exclusive Markovnikov regioselectivity.

Graphical abstract: Copper-catalyzed Markovnikov hydroboration of aliphatic terminal alkenes using carbonyl as a weak directing group
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Visible light induced boryl radical and its application in reduction of unsaturated X[double bond, length as m-dash]O (X = C, N, S) bonds

A boryl radical is generated by 4-cyanopyridine and B2cat2 and illustrated a ketyl radical by visible light, furtherly reduced unsaturated double bond X[double bond, length as m-dash]O (X = C, N, S). The reaction mechanism is confirmed by spectroscopy and calculation studies.

Graphical abstract: Visible light induced boryl radical and its application in reduction of unsaturated X [[double bond, length as m-dash]] O (X = C, N, S) bonds
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Formal [4 + 1] cycloadditions of ketiminoboranes and isonitriles

A formal [4 + 1] cycloaddition reaction of ketiminoboranes with isonitriles is described. This sequential four-component reaction could successfully incorporate HB(C6F5)2, 2,5-dimethylhexa-2,4-diene, nitriles, and isonitriles, into new BN-cycles.

Graphical abstract: Formal [4 + 1] cycloadditions of ketiminoboranes and isonitriles
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Sequence-selective three-component reactions of alkyltrifluoroborates with α,β-unsaturated carbonyl compounds and vinylphosphonium salts

A photocatalytic three-component reaction of alkyltrifluoroborates with two electron-deficient alkenes proceeds in a sequence-selective manner, which can be followed by Wittig olefination to afford γ,δ-unsaturated ketones and esters.

Graphical abstract: Sequence-selective three-component reactions of alkyltrifluoroborates with α,β-unsaturated carbonyl compounds and vinylphosphonium salts
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Synthesis, properties and application of o-carborane-based π-conjugated macrocycles

Two o-carborane-based π-conjugated macrocycles were synthesized. Single-crystal structures revealed their micropore characteristics. These macrocycles exhibit aggregation-induced emission and selective identification.

Graphical abstract: Synthesis, properties and application of o-carborane-based π-conjugated macrocycles
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Open Access Research Article

Stereoselective synthesis of five- and six-membered carbocycles via Matteson homologation/ring closing metathesis

The Matteson homologation is found to be a versatile tool for the stereoselective synthesis of polyunsaturated alkyl boronic esters, which can be used for the construction of five- and six-membered carbocycles via ring-closing metathesis.

Graphical abstract: Stereoselective synthesis of five- and six-membered carbocycles via Matteson homologation/ring closing metathesis
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Crystalline radicals derived from boron-dipyrromethene and its heavier analogues

The first series of radicals derived from boron-dipyrromethene (BODIPY) and its heavier analogues have been isolated and fully characterized.

Graphical abstract: Crystalline radicals derived from boron-dipyrromethene and its heavier analogues
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Red-shift emission and rapid up-conversion of B,N-containing electroluminescent materials via tuning intramolecular charge transfer

The introduction of different donors at the para-carbon position of the BNCz core modulates the predominance of locally excited (LE)/charger transfer (CT) states of the TADF materials to achieve full-color emission.

Graphical abstract: Red-shift emission and rapid up-conversion of B,N-containing electroluminescent materials via tuning intramolecular charge transfer
From the themed collection: FOCUS: Light-emitting diodes technology
Research Article

Hydroxylation of organoborons via uranyl photocatalysis

Aerobic oxidation of organoboron, via uranyl photocatalysis using the principle of indirect single electron transfer, was established under ambient conditions, and afforded multifarious phenols and alcohols, including nine pharmaceuticals.

Graphical abstract: Hydroxylation of organoborons via uranyl photocatalysis
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Lamellar assembly and nanostructures of amphiphilic boron(III) diketonates through suitable non-covalent interactions

Cooperative assemblies of amphiphilic boron(III) diketonate compounds, which are found to be driven by the formation of non-covalent π–π and hydrophobic interactions in THF–water solution, result in the construction of nanosheet of lamellar packing.

Graphical abstract: Lamellar assembly and nanostructures of amphiphilic boron(iii) diketonates through suitable non-covalent interactions
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

An alternative approach to triazatruxene synthesis and derivatization to a boron difluoride complex

An alternative method to access 5,10,15-triazatruxene has been developed. The 1,6,11-positions of triazatruxene can further be functionalized to construct a boron difluoride complex with a large Stokes shift.

Graphical abstract: An alternative approach to triazatruxene synthesis and derivatization to a boron difluoride complex
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

In situ pyrazolylborate ligand synthesis and coordination behaviours in aluminum oxo clusters

Presented herein is the discovery of the in situ synthesis of pyrazolylborates. They exhibit great adaptive coordination behaviors in aluminum oxo clusters and further provide a platform for the development of trans-chelating scorpionate analogues.

Graphical abstract: In situ pyrazolylborate ligand synthesis and coordination behaviours in aluminum oxo clusters
From the themed collection: FOCUS: Metal and Metal-Containing Clusters
Research Article

Fused-ring molecules based on B ← N and imide units with low energy levels

We synthesized n-type polycyclic aromatic hydrocarbons incorporated with both B ← N and imide units for the first time and examined their optical and electrochemical properties.

Graphical abstract: Fused-ring molecules based on B ← N and imide units with low energy levels
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

A metal-free protocol for the preparation of amines using ammonia borane under mild conditions

A mild and convenient reductive amination protocol for the synthesis of structurally diverse secondary and tertiary amines as well as N-methylated products under metal-free conditions is presented.

Graphical abstract: A metal-free protocol for the preparation of amines using ammonia borane under mild conditions
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Base-promoted synthesis of tetrasubstituted alkenylboronates from propargyl amines and B2pin2via dual 1,4-metallate shift and B–N elimination

An efficient approach to synthesize tetrasubstituted alkenylboronates via a cascade borylation/B–N elimination of propargyl amines and B2pin2 is disclosed.

Graphical abstract: Base-promoted synthesis of tetrasubstituted alkenylboronates from propargyl amines and B2pin2via dual 1,4-metallate shift and B–N elimination
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Highly diastereo- and enantioselective copper-catalyzed methylboration of 1,2-dihydroquinolines and 2H-chromenes

A Cu-catalyzed asymmetric methylboration of 1,2-dihydroquinolines, 2H-chromenes and 2H-thiochromenes providing boryl products bearing two adjacent chiral centers with excellent selectivities, up to 99 : 1 dr and 99.9% ee, has been realized for the first time.

Graphical abstract: Highly diastereo- and enantioselective copper-catalyzed methylboration of 1,2-dihydroquinolines and 2H-chromenes
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Highly oxidized U(VI) within the smallest fullerene: gas-phase synthesis and computational study of boron-doped U@C27B

The smallest borafullerene U@C27B has been synthesized using a laser vaporization cluster source. The U atom, placed in the middle of the cage and interacting with all the 28 atoms, is formally described as highly oxidized U(VI).

Graphical abstract: Highly oxidized U(vi) within the smallest fullerene: gas-phase synthesis and computational study of boron-doped U@C27B
From the themed collection: FOCUS: Metal and Metal-Containing Clusters
Research Article

Rb3B5O8F2 and K0.6Rb2.4B5O8F2: two new deep-ultraviolet transparent nonlinear optical fluorooxoborates designed by cation regulation

Two new alkali metal fluorooxoborates, Rb3B5O8F2 and K0.6Rb2.4B5O8F2, were successfully obtained by cation regulation, which exhibit a short UV cutoff edge and an appropriate SHG response.

Graphical abstract: Rb3B5O8F2 and K0.6Rb2.4B5O8F2: two new deep-ultraviolet transparent nonlinear optical fluorooxoborates designed by cation regulation
Research Article

Photoinduced oxidation of benzylic boronic esters to ketones/aldehydes via α-borylalkyl radicals

The direct conversion from boronic esters to the carbonyl groups has been realized herein, via the bromine radical and α-borylalkyl radical under visible light.

Graphical abstract: Photoinduced oxidation of benzylic boronic esters to ketones/aldehydes via α-borylalkyl radicals
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Merging dual photoredox/cobalt catalysis and boronic acid (derivatives) activation for the Minisci reaction

Boronic acid (derivatives) activation for the Minisci reaction via dual photoredox/cobalt catalysis in batch and under continuous-flow.

Graphical abstract: Merging dual photoredox/cobalt catalysis and boronic acid (derivatives) activation for the Minisci reaction
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Amorphous CoB nanoarray as a high-efficiency electrocatalyst for nitrite reduction to ammonia

Amorphous CoB nanoarray is a high-efficiency catalyst for electrocatalytic NO2-to-NH3 conversion, capable of attaining a large NH3 yield of 233.1 μmol h−1 cm−2 and a high faradaic efficiency of 95.2% at −0.7 V in 0.1 M Na2SO4 with 400 ppm NO2.

Graphical abstract: Amorphous CoB nanoarray as a high-efficiency electrocatalyst for nitrite reduction to ammonia
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Sc2F2(B2O5): a deep ultraviolet scandium borate fluoride exhibiting large birefringence induced by the synergistic effect of B2O5 and ScOnF2 groups

A rare earth borate fluoride, Sc2F2(B2O5), displays a deep ultraviolet cutoff edge (<200 nm) and very large birefringence induced by the synergistic effect of B2O5 and ScOnF2 groups.

Graphical abstract: Sc2F2(B2O5): a deep ultraviolet scandium borate fluoride exhibiting large birefringence induced by the synergistic effect of B2O5 and ScOnF2 groups
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Highly selective electrophilic B(9)-amination of o-carborane driven by HOTf and HFIP

An efficient B(9) electrophilic amination of o-carboranes with azodicarboxylates, promoted by a Brønsted acid and HFIP, was developed.

Graphical abstract: Highly selective electrophilic B(9)-amination of o-carborane driven by HOTf and HFIP
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Copper-catalyzed synthesis of cyclopropyl bis(boronates) from aryl olefins and carbon monoxide

A copper-catalyzed carbonylation process has been developed for the synthesis of diborylated cyclopropanes from both stable internal and terminal aryl olefins in moderate to good yields.

Graphical abstract: Copper-catalyzed synthesis of cyclopropyl bis(boronates) from aryl olefins and carbon monoxide
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Autocatalytic aerobic ipso-hydroxylation of arylboronic acid with Hantzsch ester and Hantzsch pyridine

ipso-Hydroxylation of arylboronic acids with Hantzsch ester has been developed. The by-product Hantzsch pyridine was found to promote the reaction in the presence of oxygen under ambient conditions.

Graphical abstract: Autocatalytic aerobic ipso-hydroxylation of arylboronic acid with Hantzsch ester and Hantzsch pyridine
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Coupling BODIPY with nitrogen-doped graphene quantum dots to address the water solubility of photosensitizers

Water-soluble photosensitizers based on covalently grafted nitrogen-doped graphene quantum dot–BODIPY for cellular imaging and photodynamic therapy.

Graphical abstract: Coupling BODIPY with nitrogen-doped graphene quantum dots to address the water solubility of photosensitizers
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Regulation of solid-state dual-emission properties by switching luminescence processes based on a bis-o-carborane-modified anthracene triad

A combination of luminescence processes in dual-emission properties by selecting preparation protocols is designed but also temperature-driven switching of luminescence processes in dual-emission properties based on a bis-o-carborane-substituted anthracene triad in crystals.

Graphical abstract: Regulation of solid-state dual-emission properties by switching luminescence processes based on a bis-o-carborane-modified anthracene triad
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Visible-light photoredox catalysis-enabled borocyclopropanation of alkenes

A convenient method for the synthesis of cyclopropyl boronates via visible-light photoredox-catalyzed borocyclopropanation of alkenes has been established. This protocol is characterized by its wide substrate scope and mild reaction conditions.

Graphical abstract: Visible-light photoredox catalysis-enabled borocyclopropanation of alkenes
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Open Access Research Article

The Mössbauer effect using 57Fe-ferrabisdicarbollide ([o-57FESAN]): a glance into the potential of a low-dose approach for glioblastoma radiotherapy

Na[o-57FESAN] with potential for glioblastoma treatment by Mössbauer effect. Mössbauer spectrum and 2D Fe distribution maps indicate that [o-57FESAN] is present inside U87 cells, a desired target for selective Mössbauer absorption energy deposition.

Graphical abstract: The Mössbauer effect using 57Fe-ferrabisdicarbollide ([o-57FESAN]−): a glance into the potential of a low-dose approach for glioblastoma radiotherapy
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Regioselectivity of Pd-catalyzed o-carborane arylation: a theoretical view

B(3)-Arylation is unfavorable because the steric repulsion between the substituent group on C(2) and the metal moiety would lead to significant distortion of o-carborane and would result in a higher activation energy for reductive elimination.

Graphical abstract: Regioselectivity of Pd-catalyzed o-carborane arylation: a theoretical view
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Highly dispersed Ru nanoclusters anchored on B,N co-doped carbon nanotubes for water splitting

Ultrafine dispersed ruthenium nanoparticles on B,N-co-doped carbon nanotubes with simultaneously optimized nanostructures and electronic property were developed to achieve a high catalytic activity for both HER and OER.

Graphical abstract: Highly dispersed Ru nanoclusters anchored on B,N co-doped carbon nanotubes for water splitting
From the themed collection: FOCUS: Metal and Metal-Containing Clusters
Research Article

Chiral tetracoordinate organoboranes based on double B←N bridged bipyridine with circularly polarized luminescence

Two chiral tetracoordinate organoboranes based on double B←N bridged bipyridine were synthesized via an Et2AlCl-mediated reaction, and they possess excellent circularly polarized luminescence performance.

Graphical abstract: Chiral tetracoordinate organoboranes based on double B←N bridged bipyridine with circularly polarized luminescence
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

Origins of regio- and stereoselectivity in Cu-catalyzed alkyne difunctionalization with CO2 and organoboranes

The anti-to-Cu 1,2-migration of alkynyl boronates is critical for the 1,1-E-selective difunctionalization of terminal alkynes with CO2 and organoboranes.

Graphical abstract: Origins of regio- and stereoselectivity in Cu-catalyzed alkyne difunctionalization with CO2 and organoboranes
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Research Article

A nickel/organoboron catalyzed metallaphotoredox platform for C(sp2)–P and C(sp2)–S bond construction

A boron-based organic photocatalyst has been applied in metallaphotoredox catalyzed C–P and C–S bond construction reactions.

Graphical abstract: A nickel/organoboron catalyzed metallaphotoredox platform for C(sp2)–P and C(sp2)–S bond construction
From the themed collection: FOCUS: Frontiers in Boron Chemistry
Chemistry Frontiers

The B[double bond, length as m-dash]C bond: some recent developments

The facile deprotonation of fluoroaryl-substituted alkylboranes or alkylboron cations readily leads to anionic boratalkenes or neutral boraalkenes, respectively. These B[double bond, length as m-dash]C double bond systems exhibit an increasing variety of chemical reactivities.

Graphical abstract: The B [[double bond, length as m-dash]] C bond: some recent developments
From the themed collection: 2023 Organic Chemistry Frontiers HOT articles
Chemistry Frontiers

A strategy for regioselective B–H functionalization of o-carboranes via base metal catalysis

This frontier article summarizes the recent developments in base metal-catalyzed regioselective cage B–H functionalization of carboranes and discusses the related challenging issues.

Graphical abstract: A strategy for regioselective B–H functionalization of o-carboranes via base metal catalysis
42 items

About this collection

Welcome to the Boron Chemistry focus collection!  With its unique electronic and structural properties, boron offers a plethora of opportunities for researchers to develop innovative applications in organometallics, catalysis, materials science, medicinal chemistry, etc. Its versatility has led to the discovery of numerous boron-based compounds with fascinating properties, making boron chemistry a vibrant and rapidly evolving discipline.

This collection highlights research breakthroughs, novel methodologies, and emerging applications in boron chemistry that were published in Frontiers Journals (Organic Chemistry Frontiers, Inorganic Chemistry Frontiers, and Materials Chemistry Frontiers). Articles featured in our focus collections are handpicked by Editors. We hope you find this collection of articles both informative and thought-provoking.

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