Soft X-ray Photochemistry at the L₂,₃-edges in K₃[Fe(CN)₆], [Co(acac)₃] and [Cp₂Fe][BF₄]

Soft X-ray photoreduction has been observed in K3[Fe(CN)6], [Co(acac)3] and [Cp2Fe][BF4]

Soft X-ray Induced Excited Spin State Trapping and Soft X-ray Photochemistry at the Iron L₂,₃ Edge in [Fe(phen)₂(NCS)₂] and [Fe(phen)₂(NCSe)₂] (phen = 1,10-phenanthroline)

The first observation of soft X-ray induced excited spin state trapping has been made for [Fe(phen)2(NCS)2] and [Fe(phen)2(NCSe)2] (phen = 1,10-phenanthroline) at ca. 45 K, analogous to light induced excited spin state trapping but at much higher energy. Soft X-ray photochemistry has also been observed in the high- and low-spin states of [Fe(phen)2(NCS)2] and [Fe(phen)2(NCSe)2], resulting in the formation of a thermally irreversible low-spin state. The rate of formation of this low-spin state is greater from low than from high spin, and is also greater in [Fe(phen)2(NCSe)2] than in [Fe(phen)2(NCS)2]

X-ray Absorption Fine Structure Study of the Bound State Electronic Transitions at the Vanadium K and L Edges in Low Symmetry, Molecular, Vanadium-(IV) and -(V) Complexes with Oxyoxime and Oxyoximate Ligands

A combination of vanadium K- and L-edge XAFS has been used to characterise a series of monomeric oxovanadium(IV), monomeric dioxovanadium(V) and dimeric oxovanadium(V) complexes with oxyoxime and oxyoximate ligands. The K- and L-edge spectra confirm the presence of V V in the dimeric species and the L-edge spectra have been used to discriminate between six-co-ordinate V-N-O-V bridged oxovanadium(V) dimers and seven-co-ordinate phenolate bridged oxovanadium(V) dimers containing η 2-N-O groups