science-softCon uv/vis+ spectra data base;	www.uv-spectra.de, (C) science-softCon 2019

Substance: methyl ethyl ketone			Other Names: MEK; 2-butanone

Formula: C2H5COCH3				CAS-No.: 78-93-3

Study: photolysis, quantum yields, absorption cross sections


Authors: R. Nádasdi, G.L. Zügner, M. Farkas, S. Dóbé, S. Maeda, K. Morokuma

Title: Photochemistry of Methyl Ethyl Ketone: Quantum Yields and S1/S0-Diradical Mechanism of Photodissociation

Journal/Source: Chem. Phys. Chem, 11 (18), 3883-3895, (2010); DOI: 10.1002/cphc.201000522


Data: table, diagram

Energy/Wavelength range: 221 - 351 nm

Resolution: 

Temperature: 233 - 323 K

Temperature dependence: yes

Pressure/Concentration: 67 - 998 mbar synthetic air

Phase: gas

pH:


Comments: The QY at 248 nm is close to unity and independent of pressure (T=298 K). At 308 nm, the QY decreases with 
decreasing temperature (T=323-233 K) and with increasing pressure (P=67-998 mbar synthetic air). 
Temperature dependent UV absorption cross-sections are also determined (253 - 363 K; wavelength accuracy ~ 0.4 nm).

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