Themed collection SBQ-RSC: Celebrating UK-Brazil collaborations
Galvanic replacement reaction: recent developments for engineering metal nanostructures towards catalytic applications
Recent developments to achieve further physicochemical control in metallic nanomaterials by galvanic replacement are discussed towards applications in catalysis.
Technical challenges of working with extracellular vesicles
Extracellular Vesicles (EVs) are gaining interest as central players in liquid biopsies, with potential applications in diagnosis, prognosis and therapeutic guidance in most pathological conditions.
Quinone-based fluorophores for imaging biological processes
This tutorial review covers recent advances in the design, synthesis and application of quinone-based fluorescent agents for visualizing specific processes in multiple biological systems, from cells to tissues and complex organisms in vivo.
Synthesis of two ‘heteroaromatic rings of the future’ for applications in medicinal chemistry
Synthetic protocols that provide access on multigram scale to unknown heteroaromatic ring systems of potential value for medicinal chemistry.
Methyltransferase-directed covalent coupling of fluorophores to DNA
Highly efficient DNA labelling using an enzymatically-directed, strain-promoted azide–alkyne cycloaddition.
Overcoming naphthoquinone deactivation: rhodium-catalyzed C-5 selective C–H iodination as a gateway to functionalized derivatives
Rh-catalyzed C-5 selective C–H iodination of naphthoquinones provides a gateway to previously inaccessible A-ring analogues. C-2 selective processes can be achieved under related conditions.
Revealing the nature of low-temperature photoluminescence peaks by laser treatment in van der Waals epitaxially grown WS2 monolayers
Van der Waals epitaxially grown WS2 monolayers and laser effects on their optical properties are reported.
The role of fullerenes in the environmental stability of polymer:fullerene solar cells
Environmental stability is a common challenge for the commercialisation of low cost, encapsulation-free organic opto-electronic devices.
Confined naked gold nanoparticles in ionic liquid films
Surface-clean Au nanoparticles (NPs) confined in films of ionic liquids (ILs) can be easily fabricated by sputtering deposition.
Selective C–H bond electro-oxidation of benzylic acetates and alcohols to benzaldehydes
A method for the electrosynthesis of aldehydes is presented.
Synthesis, crystallographic characterization and homogeneous catalytic activity of novel unsymmetric porphyrins
Unsymmetric porphyrins containing both pentafluorophenyl (PFP = A) and 3,4-dimethoxyphenyl (DMP = B) substituents at the meso positions were prepared using Lindsey's methodology.
Quantum capacitance as a reagentless molecular sensing element
The application of nanoscale capacitance as a transduction of molecular recognition relevant to molecular diagnostics is demonstrated, wherein the energy-related signal relates directly to the electron occupation of quantized states.
Synthesis of kinase inhibitors containing a pentafluorosulfanyl moiety
A series of 3-methylidene-1H-indol-2(3H)-ones substituted with a 5- or 6-pentafluorosulfanyl group has been synthesized by a Knoevenagel condensation reaction of SF5-substituted oxindoles with a range of aldehydes.
Study of molecular structure, chemical reactivity and H-bonding interactions in the cocrystal of nitrofurantoin with urea
The cocrystal of nitrofurantoin with urea (C8H6N4O5)·(CH4N2O), a non-ionic supramolecular complex, has been studied.
Cellulose ionics: switching ionic diode responses by surface charge in reconstituted cellulose films
Cellulose films as well as chitosan-modified cellulose films of approximately 5 μm thickness, reconstituted from ionic liquid media onto a poly(ethylene-terephthalate) (PET, 6 μm thickness) film with a 5, 10, 20, or 40 μm diameter laser-drilled microhole, show significant current rectification in aqueous NaCl.
Polysaccharide-derived mesoporous materials (Starbon®) for sustainable separation of complex mixtures
Electron ionization of helium droplets containing C60 and alcohol clusters
Alcoholic chemical reactions at similar conditions as the interstellar medium can be heavily hampered by the presence of C60.
Insights into the role of 3-O-sulfotransferase in heparan sulfate biosynthesis
Tree structure for the biosynthesis of 3-O-sulfated glucosamine.
The structure of liquid alkali nitrates and nitrites
State of the art high energy X-ray diffraction experiments and simulation models (employing a description of charge transfer) are applied to pure molten alkali nitrates and nitrites and uncover significant emerging structure.
Surfactant-exfoliated 2D molybdenum disulphide (2D-MoS2): the role of surfactant upon the hydrogen evolution reaction
The surfactant (sodium cholate) when used in the liquid exfoliation of 2D-MoS2 has a detrimental effect upon its electrocatalytic activity compared to pristine 2D-MoS2 (produced without a surfactant).
Synthesis, crystal structure and magnetic properties of [Co(bpcam)2]ClO4·dmso·H2O, [Co(bpcam)2]2[Co(NCS)4]·dmso·H2O and [Ni(bpcam)2]·H2O [Hbpcam = bis(2-pyrimidylcarbonyl)amide]
Synthesis, crystal structures, spectroscopy and magnetic properties of three new bpcam-containing complexes are presented here.
1 H and 19F NMR in drug stress testing: the case of voriconazole
Stress tests form an important part of drug development, and of subsequent accreditation.
Ionic liquids containing tricyanomethanide anions: physicochemical characterisation and performance as electrochemical double-layer capacitor electrolytes
Fluorine free ionic liquids with low density and high ionic conductivity for high energy electrochemical double-layer capacitors.
Mapping the ionic fingerprints of molecular monolayers
Molecular dynamics simulations support a self-assembled monolayer specific energy barrier to solution-phase ions that once surmounted, the entrapped ions support a film embedded ionic capacitance and non-faradaic relaxation (mapping through electrochemical capacitance measurements). The associated capacitance can be assigned as a particular case of general electrochemical capacitance.
On the subtle tuneability of cellulose hydrogels: implications for binding of biomolecules demonstrated for CBM 1
Choice of molecular probe for determining porosity, surface area, or binding in never-dried cellulose hydrogels is critical to discern differences in structure.
Structural variety in ytterbium dicarboxylate frameworks and in situ study diffraction of their solvothermal crystallisation
Solvothermal synthesis yields four Yb coordination polymers depending on solvent and time.
Insertion of nanostructured titanates into the pores of an anodised TiO2 nanotube array by mechanically stimulated electrophoretic deposition
TiO2 nanotube (TiO2NT) surfaces can achieve a high area surface and enhanced electrocatalytic properties.
Indirect consequences of exciplex states on the phosphorescence lifetime of phenazine-based 1,2,3-triazole luminescent probes
Exciplex formation, and delayed fluorescence and phosphorescence interplay interactions were investigated in phenazine derivative solutions at room temperature.
Copper(II) catalyzed synthesis of novel helical luminescent benzo[4,5]imidazo[1,2-a][1,10]phenanthrolines via an intramolecular C–H amination reaction
Novel helical luminescent benzoimidazophenanthrolines were prepared using a Cu(II) catalyzed C–H amination reaction.
Chiral organocatalysts based on lipopeptide micelles for aldol reactions in water
Self-assembly of a proline-capped lipopeptide in water provides unprecedented enhancement of catalytic activity in aldol reactions.
Effect of the magnetic core of (MnFe)2O3@Ta2O5 nanoparticles on photocatalytic hydrogen production
(MnFe)2O3@Ta2O5–IL core–shell materials showed better photocatalytic H2 production compared to individual core MF and shell Ta2O5.
Chemoprotective activity of mixed valence polyoxovanadates against diethylsulphate in E. coli cultures: insights from solution speciation studies
Cell survival after treatment with dimethylsulphate in the presence of polyoxovanadates.
The effects of photodynamic treatment with new methylene blue N on the Candida albicans proteome
Photodynamic treatment induces fluence-dependent protein damage and modifies C. albicans proteome.
Superior activity of the CuS–TiO2/Pt hybrid nanostructure towards visible light induced hydrogen production
A CuS–TiO2–Pt showed improved H2 production (746 μmol h−1 g−1) compared to CuS–TiO2 (458 μmol h−1 g−1) under the irradiation of UV-Vis light which is due to charge separation by the addition of Pt.
Structural behaviour and gene delivery in complexes formed between DNA and arginine-containing peptide amphiphiles
The liquid-crystalline nature of a lipopeptide scaffold is found to enhance cell uptake in complexes formed between plasmid DNA and arginine-containing peptide amphiphiles.
The polynuclear complex Cu4I4py4 loaded in mesoporous silica: photophysics, theoretical investigation, and highly sensitive oxygen sensing application
The polynuclear complex Cu4I4py4 has been largely studied in solution and in the powder form due to its interesting luminescent properties, which are largely dependent on temperature and pressure.
An experimental and theoretical study into the facile, homogenous (N-heterocyclic carbene)2-Pd(0) catalyzed diboration of internal and terminal alkynes
Pd(ITMe)2(PhCCPh) is a pre-catalyst in the unprecedented homogenous catalyzed diboration of terminal and internal alkynes.
Convection in liquid-state NMR: expect the unexpected
Temperature gradients in liquid NMR samples cause convection, attenuating signals in experiments that use field gradients. Different spectrometers and probes show surprisingly different dependences of convection velocity vmax on temperature T.
Adsorption of asphaltenes on the calcite (10.4) surface by first-principles calculations
While the asphaltene-resin dimer leads to π–π stacking outward from surface, sulphide group favors this nanoaggregate adsorption on calcite that is energetically similar to the asphaltene monomer adsorbed through less steric and dielectric effects.
Niobic acid nanoparticle catalysts for the aqueous phase transformation of glucose and fructose to 5-hydroxymethylfurfural
The first catalytic application of a nanoparticulate niobia solid acid prepared from a high area peroxo niobic acid sol, and its SBA-15 supported analogue, is demonstrated for the heterogeneously catalysed aqueous phase conversion of glucose and fructose to 5-HMF.
Cysteine determination via adsorptive stripping voltammetry using a bare glassy carbon electrode
Determination of cysteine by adsorptive stripping voltammetry at a bare GCE in an acidic electrolyte medium in the presence of copper(II) ions.
Immobilized tannase treatment alters polyphenolic composition in teas and their potential anti-obesity and hypoglycemic activities in vitro
Tannase treatment caused predictable changes in the polyphenol composition of teas that can improve the benefits of a common beverage.
A PGSE NMR approach to the characterization of single and multi-site halogen-bonded adducts in solution
The diffusional PGSE NMR technique allows a detailed characterization of single- and multi-site halogen-bonded systems.
Arsenic containing medium and long chain fatty acids in marine fish oil identified as degradation products using reversed-phase HPLC-ICP-MS/ESI-MS
This study describes the identification and quantification of five new arsenolipids present in raw marine fish oil extracted mainly from Peruvian anchoveta (Engraulis ringens).
Diamond-coated ‘black silicon’ as a promising material for high-surface-area electrochemical electrodes and antibacterial surfaces
Coating black silicon needles in a uniform layer of conducting boron-doped CVD diamond produces a high-surface-area electrode material that promising for electrochemical applications, as well as acting as a robust bactericidal surface.
Fortified interpenetrating polymers – bacteria resistant coatings for medical devices
Nanocapsule-mediated eugenol release from an interpenetrating polymer network coating reduces bacterial binding on medical devices.
Confined water in imidazolium based ionic liquids: a supramolecular guest@host complex case
Traces of water in some ionic liquids can be regarded as a guest@host supramolecular structure even when diluted in solvents with high dielectric constants.
The identification of peptides by nanoLC-MS/MS from human surface tooth enamel following a simple acid etch extraction
Tooth enamel is the hardest, densest and most mineralized tissue in vertebrates.
Pencil it in: pencil drawn electrochemical sensing platforms
Inspired by recent reports concerning the utilisation of hand drawn pencil macroelectrodes (PDEs), we report the fabrication, characterisation (physicochemical and electrochemical) and implementation (electrochemical sensing) of various PDEs drawn upon a flexible polyester substrate.
Synergizing nanocomposites of CdSe/TiO2 nanotubes for improved photoelectrochemical activity via thermal treatment
Effect of the thermal treatment temperature on the photoelectrochemical (PEC) activity of CdSe/TiO2 nanocomposites.
Importance of non-affine viscoelastic response in disordered fibre networks
Disordered fibre networks are ubiquitous in nature and have a wide range of industrial applications as novel biomaterials. Here a numerical methodology for investigating the dynamical, non-affine response of fibre networks is described and applied to a recently-introduced 2D peptide model.
Hybrid tantalum oxide nanoparticles from the hydrolysis of imidazolium tantalate ionic liquids: efficient catalysts for hydrogen generation from ethanol/water solutions
The reaction of BMI·Cl or DMI·Cl with TaCl5 affords imidazolium tantalate ionic liquids BMI·TaCl61 and DMI·TaCl62, precursors for the synthesis of Ta2O5 nanoparticles.
Voltammetric detection of glutathione: an adsorptive stripping voltammetry approach
High sensitive detection of glutathione in presence of copper(II) ions by cyclic voltammetry using a bare glassy carbon electrode is presented.
Heteropoly acid catalysts for the synthesis of fragrance compounds from bio-renewables: acetylation of nopol and terpenic alcohols
Commercially important esters are obtained from biomass-based alcohols via green solvent-free catalytic processes under ambient conditions using a simple heterogeneous catalyst.
Can solvent induced surface modifications applied to screen-printed platforms enhance their electroanalytical performance?
In this paper the effect of solvent induced chemical surface enhancements upon graphitic screen-printed electrodes (SPEs) are critically benchmarked.
Can the mechanical activation (polishing) of screen-printed electrodes enhance their electroanalytical response?
The use of mechanical activation (polishing) as a pre-treatment for screen-printed electrodes (SPEs) is reported and shown to give rise to an improved electroanalytical response.
Enhanced photocatalytic hydrogen production from Y2O3/TiO2 nano-composites: a comparative study on hydrothermal synthesis with and without an ionic liquid
The synthesis of Y2O3/TiO2 nano-composites via hydrothermal and ionic liquid assisted hydrothermal methods, for photocatalytic hydrogen production.
High temperature low vacuum synthesis of a freestanding three-dimensional graphene nano-ribbon foam electrode
A facile high temperature low vacuum process is reported for the synthesis of a freestanding 3D graphene nano-ribbon open cell foam electrode and its electrochemical properties are explored.
A radical rebound mechanism for the methane oxidation reaction promoted by the dicopper center of a pMMO enzyme: a computational perspective
Hydrogen Atom Transfer (HAT) promoted by a triplet state of the bis-oxoCu2(III) core generates a new radical rebound mechanism for the hydroxylation of methane catalyzed by the binuclear copper site of a pMMO enzyme.
Nanocrystalline anatase TiO2/reduced graphene oxide composite films as photoanodes for photoelectrochemical water splitting studies: the role of reduced graphene oxide
Schematic of a photoelectrochemical cell using TiO2/RGO film as the photoanode.
Multihierarchical electrodes based on titanate nanotubes and zinc oxide nanorods for photoelectrochemical water splitting
This work describes a novel class of multihierarchical electrodes based on TiNTs and ZnONRs obtained via a simple two-step method, for efficient oxygen evolution via photoelectrochemical water splitting.
Implications of flexible spacer rotational processes on the liquid crystal behavior of 4,5-dihydroisoxazole benzoate dimers
Liquid crystals behavior of the 5a–d and 9a–d was dictated by rotational aspects of the flexible spacer.
ATR-FTIR spectroscopy coupled with chemometric analysis discriminates normal, borderline and malignant ovarian tissue: classifying subtypes of human cancer
Spectrochemical discrimination of ovarian cancer.
Forensic electrochemistry: simultaneous voltammetric detection of MDMA and its fatal counterpart “Dr Death” (PMA)
For the first time MDMA and PMA are simultaneously detected using electrochemical techniques.
Fluorine in fragrances: exploring the difluoromethylene (CF2) group as a conformational constraint in macrocyclic musk lactones
The synthesis of a series of selectively fluorinated musk lactones is reported with CF2 groups at various locations to bias conformation the ring.
About this collection
The Royal Society of Chemistry is delighted to celebrate the signature of an updated MoU with Brazilian Chemical Society during the 41th SBQ Annual Meeting in 2018. Marking the occasion we organised a post-publication web themed issue free to access for a limited period (up to June 8). The cross-journal collection highlights the excellence and breadth of Brazilian and UK research achievements across the chemical sciences and includes contributions from our Editorial and Advisory Boards.
This themed issue is a selection of UK and Brazilian authors publishing together, collected by Web-of-Scinece Core collection, having corresponding authors from at least one country. The time range defined is published papers on 2016, 2017 and the latest in 2018 (as for April 19).
The MoU and this themed collection also celebrates the UK-Brazil Year of Science and Innovation 2018-2019, promoted by the Science and Innovation Network Brazil.
The esteemed SBQ President Aldo Zarbim and RSC President Dominic Tildesley discuss the collection in the accompanying blog post here.