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Technical Specifications

UV-Visible Absorbance:

Agilent HP8453A UV-Visible absorbance spectrophotometer

  • Measurement of UV-Visible absorbance spectra of solutions and thin films
  • Single-beam diode array spectrophotometer
  • 190 – 1100 nm wavelength range, 1 nm slit width
  • <+- 0.5 nm wavelength accuracy, 0.02 nm resolution
  •  Very short acquisition time
  • Software: ChemStation for UV-Visible Spectroscopy (Agilent)

Steady-State Luminescence:

PTI QuantaMaster 6000 spectrofluorometer

  • Steady-state emission and excitation spectra, time-resolved emission and synchronous scan spectra of solution and solid phase samples
  • 250 – 800 nm corrected wavelength range, 185 – 900 nm uncorrected
  • +/- 0.5 nm wavelength accuracy, 0.06 nm resolution
  • 75 W Ushio Xe arc lamp excitation source
  • Wavelength selection by variable slit-width Czerny-Turner f/3.4 grating monochromators
  • Peltier-cooled Hamamatsu R-928 five-stage PMT detector (photon counting mode)
  • Adjustable pivoting mounting pedestal for flat solid samples and films
  • Variable temperature option available (77 – 298 K)
  • Software: FeliX (PTI)

Time-Resolved Luminescence:PTI LaserStrobe TM-3 fluorescence lifetime spectrofluorometer

  • Luminescence decay measurements of solution and solid phase samples
  • PTI GL-3300 N2 laser (337.2 nm, 800 ps fwhm) primary excitation source
  • Secondary excitation wavelengths available via PTI GL-302 dye laser module
    • 400, 446, and 500 nm dyes on hand; others may be available upon request
  • 5, 10, and 20 Hz repetition rates
  • Emission wavelength selection by variable slit-width Czerny-Turner f/3.4 grating monochromator
  • Hamamatsu R-928 five-stage PMT detector (photon counting mode)
  • Fluorescence measured by a proprietary stroboscopic technique developed by PTI, using a Stanford Research System Model DG535 four-channel digital delay pulse generator for timing of laser pulses and data acquisition
  • Variable temperature option available (77 – 298 K)
  • Software: TimeMaster (PTI)

Laser Flash Photolysis:

Applied Photophysics LKS 60 laser flash photolysis spectrophotometer

  • Transient absorption/emission decay traces and spectra of solution and solid phase samples
  • Pulsed laser excitation via a Quantel Big Sky Laser Brilliant B Nd:YAG laser
    • 1064 nm, 5.4 ns fwhm fundamental
    • 532, 355, and 266 nm excitation wavelengths available
    • Crossed-beam or collinear excitation alignment
    • Absorption measurement via a 150 W Ushio pulsed xenon flash lamp
    • Measures kinetics over nanosecond to sub-millisecond timescales
    • Wavelength selection by variable slit-width Czerny-Turner f/3.4 grating monochromators
    • Hamamatsu R-928 five-stage PMT detector
    • Analog signal digitization by an Agilent Infiniium 54830B 600 MHz oscilloscope
    • Variable temperature option available (77 – 298 K)
    • Diffuse reflectance accessory for measurement of opaque solids/films
    • Software: Laser (Applied Photophysics), Pro-K global analysis (Applied Photophysics)

Cryogenic Optical Spectroscopy:

Oxford Instruments Optistat DN/DN-V liquid nitrogen-cooled optical spectroscopy cryostats

  • For variable temperature measurements of solution (Optistat DN) and solid (Optistat DN-V) phase samples
  • 77 – 298 K temperature range accessible by an Oxford Instruments ITC 503 Temperature Control Unit