David H. Volman, George S. Hammond, Klaus Gollnick's Advances in Photochemistry (Volume 14) PDF

By David H. Volman, George S. Hammond, Klaus Gollnick

ISBN-10: 0471815241

ISBN-13: 9780471815242

Long ago 25 years, the emergence of lasers and laptop know-how have strongly stimulated learn at the dynamic behaviour of excited states and different transients. This quantity displays the numerous advances in experimentation and interpretation within the box, proposing new insights into the heritage of molecules that take up radiation. it's a part of a continuous sequence meant to discover the frontiers of photochemistry.

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Extra resources for Advances in Photochemistry (Volume 14)

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BMolar volumes at 20°C. , Sandusky, Ohio, 1956. %om Eqs. 6 and 10-14. qruncated form off, was employed. 52 x 10" s-'; see text. I ( I /

Flash kinetic spectroscopy has been used to determine rate constants for triplet energy transfer from indeno[2,l-a]indene to azulene as a function of temperature in n-pentane (228-290 K), toluene (228-309 K), acetonitrile (233-308 K), and r-butyl alcohol (309-342 K)(54). The adherenceof kobsd to the Arrheniusequation is satisfactory in all four solvents (Figure 15), and activation energies for excitation transfer are close to those for r-butyl radical self-reaction and to activation energies for viscous flow (Table 13).

134. ). TABLE 8. Triplet Biradical L&ifhnes" Solvent Biradical T (K) k Ref. 5 X lo6 140 Ph CH30H $0. Ph Ph 40 TABLE 8. (Continued) Biradical Solvent k T (K) Ref. 67 lo5 144 0 X Ph &OH OPh YH J O H o Ph fph P 0 X “Selected values from Ref. 135. 41 SPIN-STATISTICAL FAcIylRs IN DIFFUSION-CONTROLLEDREAcIloNS 42 (134). Recent measurements of relatively long triplet biradical lifetimes, T = lo-’ s (Table 8) also show that only singlet encounter pairs will contribute to the reactivity of freeradicals in solution.

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Advances in Photochemistry (Volume 14) by David H. Volman, George S. Hammond, Klaus Gollnick


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