✦ LIBER ✦

Vibrational frequency shifts of dicyanoethylenedithiolate on a copper electrode surface induced by electrode potential

✍ Scribed by Machiko Takahashi; Yusuke Kano; Junji Inukai; Masatoki Ito

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 379 KB
Volume: 196
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(92)85932-z

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✦ Synopsis

The vibrational frequencies of l,l-dicyanoethylene-2,2-dithiolate (i-marononitriledithiolate: tMNT) adsorbed on a copper electrode surface have been studied by surface enhanced Raman spectroscopy. IMNT on a copper electrode surface showed the CzC stretching band at 1380 cm -1 at the negative potential of -850 mV ( versus Ag/AgC1), while it shifted to 1423 cm -l at -50 inV. This frequency shift is explained by the structural changes based on the degrees of charge delocalization due to the backdonation from the surface atoms to the n* orbitals of tMNT. This model was supported by the structural and vibrational studies of Na21MNT and CudMNT6 complexes through X-ray crystal structure analysis and Raman spectroscopy. The result for 1,2dicyanoethylene-1,2-dithiolate adsorbed on a copper electrode surface is also discussed.

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