News from across RSC Publishing.
Laminated metal-organic frameworks combine flexibility with the robustness of classic zeolites. One such material, [Fe(pydc)(4,4'-bipy)].H2O, developed by Xiao-Ming Chen and colleagues at Sun Yat-Sen University, China, is able to shrink and grow its internal channels by crystal-to-crystal sliding which changes the crystal packing mode. This phenomenon is triggered by the exchange of guest molecules, dehydration and reabsorption. During these transformations the crystallinity of the material is maintained whilst significant changes in cell-parameter and free-volume are observed.
Scientists in Japan have successfully concentrated boron clusters into the outer layer of fat particles known as liposomes. Traditionally boron has been accumulated inside the liposome, although this new research shows that higher concentrations of boron can be achieved when it is stored in the liposome's outer membrane. These new boron containing particles are stable under physiological conditions. This finding could be invaluable for delivering boron into tumour tissues before boron neutron capture therapy.
Researchers from Uppsala in Sweden have developed a polymer microchip with an open tip for electrospray mass spectrometry. The microchips are fabricated in poly(dimethylsiloxane) and the open tip gives a simple assembly procedure while maintaining a narrow protruding tip. Replication was made in a nickel mould, formed by electroplating a silicon wafer. The electrospray performance of the infused microchips is satisfactory and the easy assembly of coverlid and microchip makes such tips suitable for versatile tests of chip prototypes.
Swiss researchers have reported a microplasma detector for gas chromatographic determination of non-metals in organic compounds. Peter Hauser and Renato Guchardi report a simple arrangement of two cylindrical electrodes clamped with brass electrical connections onto fused silica tubing mounted on a ceramic cube. The miniaturised detector, which is simple to use and build, has low power requirements and is potentially portable for environmental analysis.
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Metal ions make it possible to control molecular folding and unfolding.
A new microscope with tiny probe tips makes looking at single cells easier.
Molecular logic gate function is easily altered by rearranging its components.
Laser light avoids side-product formation in ligand synthesis.
Better out than in: a new ink might help to betray the presence of oxygen in pre-packed food.
Could cyanobacterial proteins hold the key to the 'hydrogen economy'?
Specially designed ligands are being called upon to try to control the chemistry of the maverick early transition metals (ETMs).
Ionic liquids provide new temperature controls
Some peptides are more susceptible than others to damage by radicals.
A non-invasive method to quantify water in living cells is being pioneered in Germany.
A greener way to dechlorinate the pesticide DDT (dichlorodiphenyltrichloroethane) is being developed by Japanese researchers.