Lab Report 2

Lab Report 2 - 6 Data was obtained 7 A 10 ml solution of...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Kinetics of the Benzophenone Ketyl Radical Anion Introduction In the presence of NaOH, the free radicals abstracted by the isopropanol solution deprotonate to the conjugate bases and undergo radical-radical termination processes that cause the loss of the benzophenone ketyl radical anion in a kinetically second order reaction. The first four processes are instantaneous. Stimulated absorption is the transition from a low energy state to one of higher energy that is driven by the electromagnetic field oscillating at the transition frequency. Materials and Methods 1. Kronos power supply was turned on. 2. Kronos was connected to the PC via USB cable. 3. Excitation light source was turned on by pressing the (ON/OFF)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
button on the front panel. 4. Spectrometer was powered on by pressing the (ON/OFF) button on the excitation light source. 5. Correct filter was placed in spectrometer.
Background image of page 2
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 6. Data was obtained. 7. A 10 ml solution of benzophenone in isopropanol was created with enough solid solute to provide an absorbance of about 1/cm at 350 nm. 8. A few small fragments of a NaOH pellet were dissolved to make the solution alkaline. 9. N 2 was bubbled through the solution for saturation and removal of air. Data The data recorded would be similar to the data from Lab Report #1. The data would have more graphs because the solution will be excited at different intensities. Discussion The conjugate base of benzophenone absorbs at 600nm. Flash excitation was performed at different intensities. The initial concentration of the triplet state and the initial free radical concentration can be varied. The half-life for the second order reaction is dependent on the flash intensity. The extracted rate parameter from the fitting procedure is not....
View Full Document

{[ snackBarMessage ]}

Page1 / 3

Lab Report 2 - 6 Data was obtained 7 A 10 ml solution of...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online