© Ultrafast Systems LLC/Vernier Software & Technology
List of Figures
Figure 1:
Examples of Vernier Flash Photolysis Spectrometer data ........................................................... 5
Figure 2:
Detector responsivity
vs.
wavelength ........................................................................................... 7
Figure 3:
Schematic of the Vernier Flash Photolysis Spectrometer .......................................................... 10
Figure 4:
Screenshot of Vernier Flash Photolysis Spectrometer Software ................................................ 13
Figure 5:
Concentration time profiles of reactant and product ................................................................... 18
Figure 6:
Example of a voltage-time waveform after importing into Logger
Pro
........................................ 21
Figure 7
: Time and voltage (raw data) and absorbance (calculated) ........................................................ 22
Figure 8:
Example of a temporal profile of the scattered excitation light. .................................................. 23
Figure 9:
Absorption (left) and emission (right) kinetic profilesincluding the scattered excitation light
picked up by the detector ............................................................................................................ 24
Figure 10:
Decay portion of the
A
-time profile ......................................................................................... 24
Figure 11:
Congo red, MW=696.67 ............................................................................................................ 26
Figure 12:
Ground state absorption spectrum of Congo red (trans conf.) in 20% water in ethanol .......... 27
Figure 13:
Kinetic profile of Congo red in 20% water in ethanol ................................................................ 29
Figure 14:
Absorption kinetic profile of Congo red in 20% water in ethanol with 2 mM OH
-
ions .............. 30
Figure 15:
Photoinduced isomerization of mercury dithizonate ................................................................. 31
Figure 16:
Ground state absorption spectrum of mercury dithizonate (trans conf.) in ethanol .................. 32
Figure 17:
Trifluoroacetic acid (TFA); MW = 114.03 .................................................................................. 33
Figure 18:
Kinetic profile of mercury dithizonate in ethanol ....................................................................... 33
Figure 19:
Structure and photochromic reaction of 6-NO
2
-BIPS ............................................................... 34
Figure 20:
Ground state absorption spectrum of one spiropyran in toluene .............................................. 36
Figure 21:
Transient absorption at 600 nm of one spiropyran in toluene .................................................. 36
Figure 22:
Example decay and exponential fit for 55°C measurement ..................................................... 37
Figure 23:
Actual data example of ln(
τ
) as a function of 1000/T ................................................................ 37
Figure 24:
Emission spectrum of xenon flash lamp ................................................................................... 38
Figure 25:
Emission spectrum of white light LED ...................................................................................... 39
Figure 26:
Transmission spectrum of 600 nm bandpass filter ................................................................... 40
