Electronic properties of thionitrites RSNO (R=C(CH3)3,CH(CH3)2)

ANTONELA CANNEVA; MAURICIO F. ERBEN; ROSANA M. ROMANO; MAOFA GE; REINALDO L. CAVASSO FILHO; CARLOS O. DELLA VÉDOVA

Campinas

Otro; 25th RAU Annual Users Meeting LNLS; 2015

Laboratório Nacional de Luz Síncrotron

Nitric oxide (NO) has been recognized as a fundamental molecule in biology and medicine. Among them, S-nitrosothiols, RSNO, have been shown to store, transport, and release NO within the mammalian body(1). It has been suggested that the formation and decay of low molecular weight RSNOs, such as S-nitrosoglutathione and S-nitrosocysteine, also represent a mechanism for the storage or transport of NO.(2) The determination of the electronic properties of simple thionitrites is an important task, because their serve as a model compounds for more complexes species, especially in connection with the previously described biological importance. The main objective was the determination of their molecular and electronic properties. Thus, depending on their chemical stability, different approaches have been applied, including Gas Electron Diffraction and vibrational spectroscopy techniques. Moreover, the gas phase He(I) photoelectron spectrum (PES) of t-BuSNO has been measured. Here, we present the results of studies on the shallow-core electronic levels of thionitrites species (CH3)2CHSNO and (CH3)3CSNO. The dissociation process that dominates the RS?NO photolysis is mostly influenced by the electronic distribution around the sulfur atom as we conclude of the analysis to the sulfur 2p level,which could be studied by using the TGM beamline.