Metallophilic interactions in polynuclear Ag(I) complex with 1-methylhydantoin studied by X-ray absorption, electronic and vibrational spectroscopies

摘要

Argentophilic interaction has been studied in silver methylhydantoin complex {[Ag(1-methylhydantoin)] ·0.5H_2O}_n using electronic, Raman and X-ray absorption spectroscopies strengthened theoretically. The EXAFS confirmed coordination number (CN = 3) of complex and metalophilic interactions. The digital filter analysis of electronic spectra revealed that broad bands at ca 38000 cm~(-1) and ca 45000 cm~(-1) observed in the solid state and solutions, respectively, were composed of two transitions, namely L– L(π→π~*) and Ag–Ag tentatively assigned to (4dσ~*→5pσ) in silver ion. The Raman spectroscopy data showed a new band at 83 cm~(-1) assigned to m(Ag2) vibration theoretically supported by DFT.