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SPECTROSCOPY FACILITY 

Dr. Renato Sampaio

 

The CHASE Spectroscopy Facility, led by Dr. Renato Sampaio, houses equipment to interrogate optical properties and excited-state photophysics and photochemistry of small molecules and materials.

 

 

 

 

 

Cary 5000 UV-vis-NIR Spectrophotometer

  • Purpose: UV-visible and NIR optical measurements
  • Wavelength range: 175 – 3000 nm.
  • Diffuse reflectance accessory: Reflectance, transmittance, or absorbance measurements with an integrating sphere to maximize the collection of reflected or transmitted light

Edinburgh PLS920 Fluorescence Spectrometer

  • Purpose 1: Steady-state photoluminescence measurements with single photon counting sensitivity.
    • Excitation range: 450 W continuous wavelength excitation 230 – 1700 nm
    • Observation spectral range: 200 – 870 nm
  • Purpose 2: Time-resolved photoluminescence kinetic measurements in the UV-visible spectral range
    • Excitation: Picosecond laser diodes (369 nm, 444.2 nm, and 485 nm) for Time Correlated Single Photon Counting (TCSPC) measurements
    • Observation spectral range: 200 – 870 nm
    • Time resolution: 100 ns
    • Time upper limit: 50 µs
  • Purpose 3: Integrating sphere – demountable accessory for the measurement of absolute photoluminescence quantum yields
    • Excitation range: 450 W continuous wavelength excitation 230 – 1700 nm
    • Observation spectral range: 200 – 870 nm

Edinburgh LP920 Nanosecond Transient Absorption Spectrometer

  • Purpose: Transient a in the UV-visible spectral range
    • Excitation: Flashlamp pumped Q-switched Nd:YAG laser operating with 355 nm coupled to an OPO for tunable excitation in the range 410 – 710 nm
    • Observation spectral range: 200 – 870 nm
    • Detection limit: 0.002 ΔO.D (single shot)
    • Time upper limit: > 1 s
    • Spectral resolution: 0.1 nm
    • Instrument Response: > 7 ns

inspIRe Time-Resolved Infrared Spectrometer

  • Purpose: Time-resolved transient absorption kinetic measurements in the infrared spectral range
    • Excitation wavelength: 532 nm
    • Observation spectral range: Mid-IR source: Global infrared source with spectral range of 2.5 – 10 µm (1000 – 4000 cm–1)
    • Detection limit: < 10–3 ΔO.D.
    • Time resolution: > 5 ns
    • Time upper limit: 4 ms
    • Spectral resolution: 2.5 – 20 cm–1, with automated control

Renishaw inVia Confocal Raman Microscope

  • Excitation laser line: 633 nm.
  • Wavelength range: 200 – 2200 nm.
  • Wavenumber range: 5 – 30,000 cm–1
  • Spectra resolution: 0.3 cm–1