Unemployment is not merely an economic issue, but a fundamental political challenge that strikes at the heart of how we organise our societies

The Chair is expected to advance research and development at NITK, fostering innovative solutions to industry-specific issues

Aradhita Parasrampuria’s innovation sees bioluminescent algae in luxury jewellery and fashion

Using a multitude of methods, chemists make unprecedented crowded alkyl amines; but one elusive target remains out of reach

Closed-loop flow process uses concentrated catalysts and recycles cofactors to improve conversion

(University of Stirling) A new University of Stirling study is seeking to understand how the easing of COVID-19 pandemic restrictions on licensed premises can be effectively managed to protect emergency services.

WA's multi-billion-dollar iron ore mines have kept operating throughout the coronavirus pandemic as Chinese demand continues — and experts say they could be what saves the Australian economy in the recovery.

The roles include machinery and production operators, truck drivers, mechanics, electricians, boilermakers, cleaners and warehouse roles.

In the title com­pound, C29H22N4O3, the carbazole system forms a dihedral angle of 68.45 (3)° with the mean plane of the bi­pyridine ring system. The bi­pyridine ring system, with two meth­oxy substituents, is approximately planar (r.m.s. deviation = 0.0670 Å), with a dihedral angle of 7.91 (13)° between the planes of the two pyridine rings. Intra­molecular C—H⋯O/N hydrogen bonds may promote the planarity of the bipyridyl ring system. In the pyridyl-substituted carbazole fragment, the pyridine ring is tilted by 56.65 (4)° with respect to the mean plane of the carbazole system (r.m.s. deviation = 0.0191 Å). In the crystal, adjacent mol­ecules are connected via C—H⋯O/N hydrogen bonds and C—H⋯π inter­actions, resulting in the formation of a three-dimensional (3D) supra­molecular network. In addition, the 3D structure contains inter­molecular π–π stacking inter­actions, with centroid–centroid distances of 3.5634 (12) Å between pyridine rings. The title com­pound exhibits a high energy gap (3.48 eV) and triplet energy (2.64 eV), indicating that it could be a suitable host material in organic light-emitting diode (OLED) applications.

The new title one-dimensional CdII coordination polymer, [Cd(C10H10N2)2(μ1,3-N3)2]n, has been synthesized and structurally characterized by single-crystal X-ray diffraction. The asymmetric unit consists of a CdII ion, one azide and one 1-benzyl­imidazole (bzi) ligand. The CdII ion is located on an inversion centre and is surrounded in a distorted octa­hedral coordination sphere by six N atoms from four symmetry-related azide ligands and two symmetry-related bzi ligands. The CdII ions are linked by double azide bridging ligands within a μ1,3-N3 end-to-end (EE) coordination mode, leading to a one-dimensional linear structure extending parallel to [100]. The supra­molecular framework is stabilized by the presence of weak C—H⋯N inter­actions, π–π stacking [centroid-to-centroid distance of 3.832 (2) Å] and C—H⋯π inter­actions between neighbouring chains.

Two new co-crystals, tetra­iodo­ethyl­ene–phenanthridine (1/2), 0.5C2I4·C13H9N (1) and tetra­iodo­ethyl­ene–benzo[f]quinoline (1/2), 0.5C2I4·C13H9N (2), were obtained from tetra­iodo­ethyl­ene and aza­phenanthrenes, and characterized by IR and fluorescence spectroscopy, elemental analysis and X-ray crystallography. In the crystal structures, C—I⋯π and C—I⋯N halogen bonds link the independent mol­ecules into one-dimensional chains and two-dimensional networks with subloops. In addition, the planar aza­phenanthrenes lend themselves to π–π stacking and C—H⋯π inter­actions, leading to a diversity of supra­molecular three-dimensional structural motifs being formed by these inter­actions. Luminescence studies show that co-crystals 1 and 2 exhibit distinctly different luminescence properties in the solid state at room temperature.

In the title hydrated complex, [Co(C15H10ClN3)2]Cl2·4H2O, the complete dication is generated by overline{4} symmetry. The CoN6 moiety shows distortion from regular octa­hedral geometry with the trans bond angles of two N—Co—N units being 160.62 (9)°. In the crystal, O—H⋯Cl and C—H⋯O inter­actions link the components into (001) sheets. The title compound exhibits blue-light emission, as indicated by photoluminescence data, and a HOMO–LUMO energy separation of 2.23 eV was obtained from its diffuse reflectance spectrum.

Enhancement of X-ray excited optical luminescence in a 100 µm-thick diamond plate by introduction of defect states via electron beam irradiation and subsequent high-temperature annealing is demonstrated. The resulting X-ray transmission-mode scintillator features a linear response to incident photon flux in the range 7.6 × 108 to 1.26 × 1012 photons s−1 mm−2 for hard X-rays (15.9 keV) using exposure times from 0.01 to 5 s. These characteristics enable a real-time transmission-mode imaging of X-ray photon flux density without disruption of X-ray instrument operation.

Crystal structure and microscopic optical properties of anthracene derivative compounds have been investigated by single-crystal synchrotron X-ray diffraction, laser confocal microscopy and fluorescence lifetime imaging microscopy.

In a new paper, Harvard-Smithsonian Center for Astrophysics astronomer Hagai Perets studies the role of binary planetesimals--clumps that orbit each other and jointly mature via three basic processes.

The post New study examines how planetesimals influence the development of a planetary system appeared first on Smithsonian Insider.

Scientists determine there is more to the shape and length of bird bills than just how they “get the worm.”

The post New study determines bill size in birds varies according to climate appeared first on Smithsonian Insider.

An 880-pound asteroid moving at 38,000 miles per hour hit the moon last September with a blast equivalent to 15 tons of TNT. While errant […]

The post Give us the telescopes and we’ll find the asteroid mines! appeared first on Smithsonian Insider.

The world’s most indestructible species, the tardigrade, an eight-legged micro-animal, also known as the water bear, will survive until the Sun dies, according to a […]

The post Study determines microscopic water bears will be Earth’s last survivors appeared first on Smithsonian Insider.

The number and diversity of tectonic landforms in our solar system “is truly remarkable,” Watters and Schultz write. Photographs of these structures have stimulated a range of scholarly investigations.

The post Book Review: Planetary Tectonics examines otherworldly landforms appeared first on Smithsonian Insider.

Forensic anthropologists from the Smithsonian's National Museum of Natural History discover African remains at a Colonial burial site in Maryland. Follow them as they study the remains, reconstruct the face and body, and share what they learn about the African experience in the Chesapeake in the 1600s.

The post Smithsonian team examines African remains from a colonial burial site in Maryland appeared first on Smithsonian Insider.

The post Device at the Smithsonian Environmental Research Center examines how phytoplankton would react if the ozone layer vanished appeared first on Smithsonian Insider.

A new report from the National Research Council examines and, when possible, estimates hidden costs of energy production and use.