Ultraviolet-Visual (UV-VIS) Adsorption Spectroscopy, Near Infrared (NIR) Spectroscopy

Objects of study

Solutions and solids, inorganic and organic substances.

Applications

• The determination of oxide defects and defect types.
• The determination of forms for the transition metal ion stabilization on the supports (valent state and coordination number).

Instrument facilities

Carl Zeiss Jena UV-VIS Specord M40 Spectrophotometer with a diffusion reflection accessory allows to record ultra-violet and visible (UV-VIS) spectra of solid samples in the range 45000 – 11000 cm^–1.

Shimadzu UV-VIS 2501 PC Spectrophotometer with a diffusion reflection accessory, operation range – 53000 – 11000 cm^–1.

Spectrolab Interspec 2010 NIR Fourier spectrometer with a diffusion reflection accessory allows to record the solid sample spectra in the near infrared region (NIR) 10000 - 3500 cm^–1.

Samples requirements

For UV-VIS: powder – not less than 1 cm³; non-transparent film – 2x2 cm².

For near IRS: powder – not less than 0.5 cm³; film – 1x1 cm².

For UV-VIS, NIR: solution – about 1 cm³, concentration of the substance to be defined in the solution – 10^–5 mol/l and higher.

Leading scientists and their research interests

Prof. E.A. Paukshtis and T V. Larina. Electron and coordination state of the cations and nature of its bonding with ligands in oxide heterogeneous catalysts and solutions.

Dr. G.V. Odegova. Stabilization of the surface complexes of transition metals.