Photochemistry: Volume 47 (Specialist Periodical Reports, 47) - Hardcover

Über die Autorin bzw. den Autor

Stefano Protti obtained the Master's degree in 2003 (110/110 cum laude). In 2007, he completed his PhD in Pavia focusing on photochemical arylations via phenyl cations. Later he moved to LASIR Laboratory (Lille, France), where he investigated the photoreactivity and the photophysics of flavonoids. He came back to Pavia and started working in the field of (photo)green synthetic chemistry. After a postdoctoral stay at the iBitTec-S laboratory (CEA Saclay, France) carrying out studies on photocatalyzed oxidation reactions for energy storage, he moved again to Pavia. Since 2018 is Associate Professor at the University of Pavia, Italy. He is currently editor of the Specialist Periodical Reports in Photochemistry of the Royal Society of Chemistry, member of the Early Career Board of the ACS Sustainable Chemistry and Engineering and of the International Advisory Board of the European Journal of Organic Chemistry. The research activity of Stefano Protti has been mainly focused on the development of new synthetic methods for the light driven formation of C-C and C-heteroatom bonds under metal free conditions.

Von der hinteren Coverseite

Drawing on the continued wealth of photochemical research, this volume combines reviews on the latest advances in the field with specific topical highlights. Starting with periodical reports of the recent literature on physical and inorganic aspects, light induced reactions in cryogenic matrices, properties of transition-metal compounds, time-resolved spectroscopy, the exploitation of solar energy and the molecules of colour. Coverage continues with highlighted topics, in the second part, from photoresponsive hydrogels, the tunable photoredox properties of organic dyes, light-driven asymmetric organocatalytic processes, dual gold–photoredox catalysis, the preparation and characterization of photosensitizers for triplet–triplet annihilation photon upconversion and the role of photochemistry on traditional synthetic processes.

This volume will include for the first time a section entitled ‘SPR Lectures on Photochemistry’, providing examples for academic readers to introduce a photochemistry topic and precious help for students in photochemistry.

Providing critical analysis of the topics, this book is essential reading for anyone wanting to keep up to date with the literature on photochemistry and its applications.

"The application of the quantum theory to photochemical processes leads to the expression N=Q/h? where Q means the heath absorbed, the frequency of the absorbed light, h the Planck constant and N the number of the molecules cleaved by light. When the above equivalence is used, the reactions in the dark must be distinguished from those involving actual excite states […] the hypothesis that the first effect of light leads simply to the cleavage of chlorine molecule into the two uncharged atoms. The application of heat values than showed that the free Cl atoms according to the equation:

Cl + H₂ ? H Cl + H…+25000 cal.

and the H atoms according to equation

H + Cl₂ ? H Cl + Cl…+ 19000 cal.

In other words, a very small number of free Cl atoms makes possible the building of a relatively large quantity of HCl. Of course this ends when free Cl atoms and free H atoms combine to give molecules of Cl₂, H₂ or HCl.

Furthermore, the great sensitivity of light reactions becomes understandable. Free H and Cl are highly reactive compounds and form the strong H–Cl bonds. These make it advisable to begin an irradiation of chlorine that follows the Einstein law. When at the place of chlorine an 'acceptor' is added that likes binding to the free Cl atoms."

W. Nernst, Z. Elektrochem., 1918, 101, 295–297.