(4-Nitrophenylsulfanylmethyl)triphenylstannane and (4-nitrophenylsulfonylmethyl)triphenylstannane: R22(X) rings (X is 10, 18 or 24) and C-H...p interactions

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2,6-Diiodo-4-nitrophenol, 2,6-diiodo-4-nitrophenyl acetate and 2,6-diiodo-4-nitroanisole: interplay of hydrogen bonds, iodo-nitro interactions and aromatic [pi]-[pi]-stacking interactions to give supramolecular structures in one, two and three dimensions

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Variable temperature study of the crystal and magnetic structures of the giant magnetoresistant materials LMnAsO (L=La, Nd)

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The crystal structure and electrical properties of the oxide ion conductor Ba3WNbO8.5

This research was supported by the Northern Research Partnership and the University of Aberdeen. We also acknowledge Science and Technology Facilities Council (STFC) for provision of beamtime at ISIS.Peer reviewedPostprin

The Relationship between the Crystal Structure and Electrical Properties of Oxide Ion Conducting Ba3W1.2Nb0.8O8.6

This research was supported by the University of Aberdeen and EPSRC (research grant EP/L002493/1). We also acknowledge the UK Science and Technology Facilities Council (STFC) for provision of beamtime at ISIS and the ILL.Peer reviewedPostprintPostprin

Historical aspects of ground beetles (Carabus) and large diving beetles (Dytiscinae) distribution in Slovenia

V zadnjih desetletjih je v Evropi vse bolj opazno upadanje specializiranih in redkih vrst velikih krešičev (Carabus) in velikih kozakov (Dytiscinae), zato je bil naš namen ugotoviti trend razširjenosti in stopnjo ogroženosti obeh izbranih skupin na območju Slovenije. Na podlagi zgodovinskih in recentnih podatkov smo izdelali karte zgodovinske razširjenosti posameznih vrst in jim glede na zmanjšanje območij razširjenosti pripisali kategorije ogroženosti. Analizirali smo podatke za 25 vrst velikih krešičev in 16 vrst velikih kozakov. Velik delež vrst obeh skupin hroščev je v upadu, vendar je izginjanje velikih kozakov zaradi uničevanja vodnih okolij izrazitejše. Na trenutnem Rdečem seznamu ogroženih vrst so le 3 vrste iz vsake od izbranih skupin, naši rezultati pa so pokazali, da bi morali na seznam uvrstiti dodatnih 14 vrst velikih krešičev in 11 vrst velikih kozakov. Najbolj izginjajo veliki krešiči, ki so vezani na negozdna okolja, na zrele, negospodarske gozdove ali na vlažne gozdove, med velikimi kozaki pa vrste, vezane na šotna barja in manjša zarasla vodna telesa. Razlika v trendu razširjenosti med stenotopnimi in evritopnimi vrstami je bila značilna le pri velikih kozakih. Nekaj vrst iz obeh skupin je v zadnjih desetletjih na območju Slovenije že izginilo, zato so potrebne intenzivne ekološke raziskave preostalih vrst in nujno čimprejšnje oblikovanje učinkovitih ukrepov varstva.In the past few decades, there has been a sharp decline in specialised and rare species of both ground beetles (Carabus) and great diving beetles (Dytiscinae) throughout Europe. Our aim was to determine the distribution trends of chosen species and their conservation status in Slovenia. Based on historical and recent data, distribution maps for each species have been made. Extensive data for 25 species of genus Carabus and 16 species of diving beetles were analysed. The reduction in distribution area sizes was used to evaluate the decline of each species in Slovenia and for assigning them to different categories of threat status. A significant number of species from both beetle groups are in declinehowever, due to destruction of suitable water habitats, the disappearing rate of diving beetles is higher. Only 3 species from each of the chosen groups of beetles are currently on the Red list of threatened species in Slovenia, and based on our results, at least 14 species of ground beetles and 11 species of diving beetles should be added to the list. Open habitat species of ground beetles, ground beetles that are dependent on mature, unmanaged forests, and diving beetles that prefer peat bogs or small, strongly vegetated ponds, were found to be the most endangered. The difference between stenotopic and eurytopic species was significant only in the case of diving beetles. A few species from both groups of beetles have already disappeared from Slovenia in the last few decades, therefore intensive ecological studies of the remaining species and immediate effective conservation strategies are essential

Methyl 1-{4-[(S)-2-(meth­oxy­carbon­yl)pyrrolidin-1-yl]-3,6-dioxocyclo­hexa-1,4-dien-1-yl}pyrrolidine-2-carboxyl­ate

The complete mol­ecule of the title diproline ester quinone, C18H22N2O6, is generated by a crystallographic twofold axis, which passes through the centre of the benzene ring. Both –CO2Me groups are orientated to the same side of the benzene ring, with the carbonyl groups pointing roughly towards each other. The conformation of the proline residue is an envelope. In the crystal, a three-dimensional network is sustained by C—H⋯O inter­actions involving both the quinone and carbonyl O atoms

Oxide Ion Conductivity in the Hexagonal Perovskite Derivative Ba3MoNbO8.5

This research was supported by the Northern Research Partnership and the University of Aberdeen. We also acknowledge STFC-GB for provision of beamtime at ISIS.Peer reviewedPostprin

High oxide ion and proton conductivity in a disordered hexagonal perovskite

This research was supported by the Leverhulme trust and EPSRC (MISE). We also acknowledge STFC-GB for provision of beamtime at the ILL.Peer reviewedPostprintPostprin

Colossal Magnetoresistance in the Mn2+ Oxypnictides NdMnAsO1-xFx

Colossal magnetoresistance (CMR) is a rare phenomenon in which the electronic resistivity of a material can be decreased by orders of magnitude upon application of a magnetic field. Such an effect could be the basis of the next generation of magnetic memory devices. Here we report CMR in the antiferromagnetic oxypnictide NdMnAsO1-xFx as a result of competition between an antiferromagnetic insulating phase with strong electron correlations and a paramagnetic semiconductor upon application of a magnetic field. The discovery of CMR in antiferromagnetic Mn2+ oxypnictide materials could open up an array of materials for further investigation and optimisation for technological applications