A SERRS spectroscopic investigation of nickel(ii) porphyrin complexes adsorbed at electrochemical interfaces

In Situ Discrimination between Axially Complexed and Ligand‐Free Co Porphyrin on Au(111) with Tip‐Enhanced Raman Spectroscopy

“…Most prominent are vibrational modes of the pyridine and phenyl moieties at around 1000 cm −1 and in the region between ca. 1100 to 1400 cm −1 , as well as CC stretch modes of the α ‐, β ‐, and m ‐carbon atoms found between 1500 to 1600 cm −1 23–25. The absence of a low‐wavenumber band below 300 cm −1 , usually characteristic for an adsorbate–metal bond, points to a rather weak interaction between CoTPP and Au.…”

Dual Role of Au nanoparticles in the Catalytic Formation of an Amorphous Polynuclear Peroxo Complex and Surface Enhanced Resonance Raman Scattering

“…The Raman scattering signal is further improved by up to two orders of magnitude when a resonance or near resonance condition is achieved with the molecular electronic state [4,5] . The combination of the two‐referred to as surface enhanced resonance Raman scattering (SERRS)‐provides the best of opportunity in pursuing vibrational probes of an analyte down to single molecule level [4–9] . SERRS provides a mean to understand the structure, bonding and kinetics of formation of inorganic complexes under in situ reaction conditions that are not amenable to many other spectroscopic techniques.…”

“…[4,5] The combination of the two-referred to as surface enhanced resonance Raman scattering (SERRS)-provides the best of opportunity in pursuing vibrational probes of an analyte down to single molecule level. [4][5][6][7][8][9] SERRS provides a mean to understand the structure, bonding and kinetics of formation of inorganic complexes under in situ reaction conditions that are not amenable to many other spectroscopic techniques. Also, the technique has the inherent advantage of studying such complexation reaction in the presence of Au or Ag as catalyst as well as plasmonic nanoparticle.…”