The photodecomposition mechanism of tert-butyl-9-methylfluorene-9-percarboxylate: new insight from femtosecond IR spectroscopy

Physical Chemistry Chemical Physics : PCCP
Christian ReichardtDirk Schwarzer

Abstract

The ultrafast photodissociation of tert-butyl-9-methylfluorene-9-percarboxylate (TBFC) is studied by mid-infrared transient absorption spectroscopy after UV excitation at 266 nm. By means of 13C-labeled TBFC and additional DFT calculations transient IR bands in the fingerprint region were unambiguously assigned to the methylfluorenyl radical. The experiments show that the fragmentation is controlled by the S1-lifetime of TBFC and, dependent on the solvent, within 0.8-2.1 ps leads to tert-butyloxy and methylfluorenyl radicals plus CO2 via concerted bond breakage of the O-O and the fluorenyl-C(carbonyl) bond. In accordance, the CO2 quantum yield is determined to be unity.

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Dec 11, 2007·Optics Letters·P HammJ Stenger
Mar 14, 2008·Physical Chemistry Chemical Physics : PCCP·Christian ReichardtDirk Schwarzer

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Citations

May 18, 2017·Physical Chemistry Chemical Physics : PCCP·J AhrensD Schwarzer
May 11, 2010·The Journal of Physical Chemistry. a·Jing ShiRun Li
Feb 20, 2014·The Journal of Physical Chemistry. a·Matías BerasateguiGustavo A Argüello

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