Thermal decay of laser-induced long living metastable electronic states in Na₂[Fe(CN)₅NO] · 2H₂O single crystals

Photo-Induced Linkage Isomerism of Transition Metal Nitrosyl and Dinitrogen Complexes Studied by Photocrystallographic Techniques

“…The stability of the NO linkage isomers is clearly dominated by electronic factors, though solid state effects cannot be completely ignored, as is clear of the variation of the metastable state decay temperatures between different salt of the same ion, between sodium nitroprusside in the neat crystal and in its complex with 18-crown-6, and by the effect of particle size on the MS1/MS2 ratio for [Ru(NH 3 ) 5 -(NO)](NO 3 ) 3 .…”

“…We would like to thank Prof P. N. Prasad and Dr A. M. Biswas for the preparation of the sol±gel glass sample containing [Ru(NH 3 ) 5 (NO)](NO 3 ) 3 , and Prof Kim Bagley of Buffalo State College for access to the IR equipment used to obtain the results shown in Fig. 2.…”

Photoinduced Oxygen Transfer and Double‐Linkage Isomerism in a cis‐(NO)(NO2) Transition‐Metal Complex by Photocrystallography, FT‐IR Spectroscopy and DFT Calculations

“…[18] In the same year, but quite unrelated, Rest and co-workers observed light-induced absorption bands in the IR spectrum of [Ni(NO)(h 5 -Cp)]. [19] Subsequent DSC studies of the thermal decay of the new states of SNP revealed not one, but at least two light-induced species, [20] which were initially described as long-lived excited states, but later identified as linkage isomers with respectively inverted and side-on conformations of the NO ligand. [21,22] Earlier we discussed the possibility of double linkage isomerization occurring on irradiation of [(tpp)Fe(NO)-(NO 2 )].…”

The nature of Ru–NO bonds in ruthenium tetraazamacrocycle nitrosyl complexes—a computational study

“…71,72 Subsequently, the presence of the metastable states of SNP was confirmed by differential scanning calorimetry (DSC). 73 These metastable states are populated when samples are irradiated at low temperature with light of the appropriate wavelength, and they are deactivated to the stable ground state (GS) isomer by red de-excitation or by thermal decay. 74,75 The ruthenium nitrosyl complexes for which long-lived metastable states were observed include K 2 37,38 In order to understand the influence of different equatorial ligands on the electronic structure of the Ru-NO chemical bonding, and thus on the reactivity of the coordinated NO, we propose an investigation into the nature of the chemical bond Ru-NO, considering tetraamine and tetraazamacrocycles as equatorial ligands, prior to and after the {RuNO} 6 to {RuNO} 7 core reduction.…”