Proton exchange, Raman spectroscopy

Both H-NMR and Raman spectroscopy have been used to identify aryldiazene complexes (184, 218, 268). However, fluorescence of [Ru-Cl(CO)2(HN2Ph)(PPh3)2] leads to poor quality of Raman spectra, and rapid exchange in polar solvents of the nonaromatic diazene proton does not allow its detection by NMR spectroscopy. 

These novel films were characterized by Raman [127] and NMR [132] spectroscopies, wide-angle X-ray scattering (WAXS), and SAXS [127,128,133]. Tests of swelling in various solvents and in water and results of conductivity (by impedance spectroscopy) indicated that these films were potential proton exchange membranes for fuel cell applications [129,134]. Indeed, the higher the content of sulfonic acid functions, the higher the conductivity, and these values are enhanced when the crystallinity rate decreases [128]. 

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