Room temperature synthesis of an amorphous MoS2 based composite stabilized by N-donor ligands and its light-driven photocatalytic hydrogen production

An amorphous molybdenum sulfide based composite has been synthesized at room temperature applying a kinetically controlled reaction. The new material exhibits an extraordinary performance in the visible light driven hydrogen evolution reaction.

Highly selective visible light-induced Ti–O bond splitting in an ansa-titanocene dihydroxido complex

Visible light irradiation of an ansa-titanocene(iv) dihydroxido complex Me₄Si₂(C₅Me₄)₂Ti(OH)₂ induces highly selective Ti–O bond activation to exclusively yield Ti(iii) complexes.

Crystal structure of tricarbon-yl(N-di-phenyl-phosphanyl-N,N'-diisopropyl-P-phenyl-phospho-nous di-amide-κ(2) P,P')cobalt(I) tetra-carbonyl-cobaltate(-I) toluene 0.25-solvate

The title compound {Co(CO)₃[Ph₂PN(i-Pr)P(Ph)N(H)i-Pr]}[Co(CO)₄] is an ionic species consisting of a Co(CO)₃[Ph₂PN(i-Pr)P(Ph)N(H)i-Pr] cation and a [Co(CO)₄] anion.

The asymmetric unit of the title compound, [Co(C₂₄H₃₀N₂P₂)(CO)₃][Co(CO)₄]·0.25C₇H₈, consists of two crystallographically independent cations with similar conformations, two anions, and one-half of a toluene mol­ecule disordered about an inversion centre. In the cations, a Co/P/N/P four-membered slightly bent metallacycle is the key structural element. The pendant NH group is not coordinated to the Co^I atom, which displays a distorted trigonal–bipyramidal coordination geometry. Weak inter­ionic hydrogen bonds are observed between the NH groups and a carbonyl group of the tetrahedral [Co(CO)₄]⁻ anions.

Low frequency excitations in multiferroic MnWO4

Dynamic anomalies have been found in the magnetically ordered phases of multiferroic MnWO(4) using polarized Raman scattering. Strong phonon damping is observed for several B(g) modes within the ferroelectric phase and has been attributed to spin-phonon interactions. Moreover, a new low frequency excitation was detected near 33 cm(-1) that grows in intensity on cooling into the antiferromagnetic phases. It is argued that this signal is most probably due to a two-magnon process.