Specialist Periodical Reports Editor Angelo Albini Photochemistry Volume 38 Photochemistry Volume 38 A Specialist Periodical Report Photochemistry Volume 38 A Review of the Literature Published between July 2007 and December 2009 Editor Angelo Albini, University of Pavia, Pavia, Italy Authors Francesco Barigelletti, Istituto ISOF-CNR, Italy Adalbert Braig, Performance Chemicals Research, Switzerland M. Consuelo Jime´nez, Universidad Polite´cnica de Valencia, Spain Telma Costa, University of Coimbra, Portugal Kurt Dietliker, Performance Chemicals Research, Switzerland Daniele Dondi, University of Pavia, Italy Rui Fausto, University of Coimbra, Portugal Andrea Go´mez-Zavaglia, University of Coimbra, Portugal Sylvie Lacombe, Universite´de Pau et Pays de l’Adour, France Andrea Maldotti, Universita´degli Studi di Ferrara, Italy Daniele Merli, University of Pavia, Italy Miguel A. Miranda, Universidad Polite´cnica de Valencia, Spain Kazuhiko Mizuno, Osaka Prefecture University, Japan Gloria Olaso-Gonza´lez, Universitat de Vale`ncia, Spain Thierry Pigot, Universite´de Pau et Pays de l’Adour, France Joa˜o Pina, University of Coimbra, Portugal Luca Pretali, University of Pavia, Italy Andrea Ricci, Performance Chemicals Research, Switzerland Daniel Roca-Sanjua´n, Universitat de Vale`ncia, Spain J. Se´rgio Seixas de Melo, University of Coimbra, Portugal Luis Serrano-Andre´s, Universitat de Vale`ncia, Spain Takashi Tsuno, Nihon University, Japan Ifyoubuythistitleonstandingorder,youwillbegivenFREEaccess to the chapters online. Please contact [email protected] with proof of purchase to arrange access to be set up. Thank you. ISBN 978-1-84755-054-5 ISSN 0556-3860 DOI: 10.1039/9781849730860 A catalogue record for this book is available from the British Library & The Royal Society of Chemistry 2011 All rights reserved Apart from fair dealing for the purposes of research or private study for non-commercial purposes, or for private study, criticism or review, as permitted under the Copyright, Designs and Patents Act, 1988 and the Copyrightand RelatedRightsRegulations2003,thispublicationmaynotbe reproduced, stored or transmitted, in any form or by any means, without the priorpermission inwriting ofThe RoyalSocietyofChemistry, orinthecase of reproduction in accordance with the terms of the licences issued by the CopyrightLicensingAgencyintheUK,orinaccordancewiththetermsofthe licences issued by the appropriate Reproduction Rights Organization outside the UK. Enquiries concerning reproduction outside the terms stated here shouldbesenttoTheRoyalSocietyofChemistryattheaddressprintedonthis page. Published by The Royal Society of Chemistry, Thomas Graham House, Science Park, Milton Road, Cambridge CB4 0WF, UK Registered Charity Number 207890 For further information see our web site at www.rsc.org Preface Angelo Albinia DOI: 10.1039/9781849730860-FP005 This is Volume 38 in the series Specialist Periodical Reports on Photo- chemistry and completes the updating process by reviewing the 21 years 2 periodfromJuly2007toDecember2009.From2010onitishopedthatthe yearlyperiodicitywillberestatedandeveryeffortwillbegivenforreducing thegapbetweenthepublicationdateoftheoriginalresearchandthereview in this series. On the other hand, a rapid publication is no more the only issue. New papers are nowadays available on the PC screen of everybody, whether at work or at home, sometimes several months in advance to the actual publication date and retrieving a desired information is easy and rapid via any of the available search engines. Thus, the newest aspects of each field will continue to find a mention in thisseries,butthiswillbebasedonaindepthdiscussionofalimitedchoice ofpapers,ratherthanonacomprehensivepresentationoftheactivityinthe field. The review part will be accompanied by a second part containing highlightsonspecificaspects.Thisisexpectedtobecomeasimportantasthe former one in this series – and has already expanded in this volume. The plan of the reports remains the same, articulated in three sections, devoted respectively to the physical and theoretical, to the organic and to theinorganicaspects.Inthefirstsectionareviewontheoreticalaspectshas been inserted (by Prof. Serrano-Andre`s) and in the last one the very ex- tensivematerialoninorganicphotochemistryhasbeensubdividedbetween prof. Maldotti and Prof. Barigelletti. The highlights section has doubled, growing fom 2 to 4 contributions. These mainly concern applied and industrial aspects, viz. new materials as photosensitizers, prebiotic photochemistry and a field characterized by a rapid grow, such has photolithography. A further highlight concerns coatings in the automobile industry and may be followed by further con- tributions evidencing where one may look for photochemistry in the in- dustry. This is probably not where photochemistry practitioners think it should, but this is the state of affairs and there goes most of the money investedinphotochemistry.Wearehappythatwellknownexpertsfromthe industry found the time for contributing. Asalways,commentsarehighlywelcome, weneedtoknowwhetherthis workhastobecontinued–andhow.Theimpressionofthepresentreporter is that having available a broad-scope information in a single book may help in discovering connections with areas outside the everyday field of activity, which is surely a plus. But it is the readers’ opinion that matters. aOrganicChemistryDepartment,PaviaUniversity,vialeTaramelli,10,27100,Pavia,Italy Photochemistry, 2011,38, v–v | v (cid:2)c TheRoyalSocietyofChemistry2011 CONTENTS Cover Anenergyleveldiagram overlaidonthesun. Backgroundimagereporduced bypermissionofNASA. Preface v Angelo Albini Reports Review of the period July 2007–December 2009 1 Angelo Albini 1 A bit of history 1 2 Photochemical literature: the present state 1 3 Review 3 References 8 Physical and theoretical aspects Recent trends in computational photochemistry 10 Luis Serrano-Andre´s, Daniel Roca-Sanjua´n and Gloria Olaso-Gonza´lez 1 Introduction 10 2 Theoretical methods and concepts for excited states 12 Photochemistry, 2011,38 , vii–xi | vii (cid:2)c TheRoyalSocietyofChemistry2011 3 Recent studies on photophysics and photochemistry 16 4 Photochemistry: nonadiabatic processes and reactivity 19 5 Conclusions 28 References 29 Light induced reactions in cryogenic matrices 37 Rui Fausto and Andrea Go´mez-Zavaglia 1 Introduction 37 2 UV/visible-induced reactions in cryomatrices 38 3 IR-induced reactions in cryomatrices 60 References 63 Dynamics and photophysics of oligomers and polymers 67 Joa˜o Pina, Telma Costa and J. Se´rgio Seixas de Melo 1 Organic conjugated polymers and oligomers 67 2 Dynamics of polymers hydrophobically modified with 90 fluorescent probes 3 Conclusions 105 References 105 Organic aspects Alkenes, alkynes, dienes, polyenes 110 Takashi Tsuno 1 Photochemistry of alkenes 110 2 Photochemistry of polyenes 131 3 Photochemistry of alkynes 132 4 Photochemistry of enynes 133 5 Photooxidation 134 References 135 Oxygen-containing functions 143 M. Consuelo Jime´nez and Miguel A. Miranda 1 Introduction 143 2 Norrish Type I reactions 143 3 Hydrogen abstraction 145 viii | Photochemistry, 2011, 38, vii–xi 4 Paterno`-Bu¨chi photocycloadditions 150 5 Photoreactions of enones and quinones 152 6 Photodecarbonylation 158 7 Photodecarboxylation 158 8 Photo-fries and photo-claisen rearrangements 160 9 Photocleavage of cyclic ethers 161 References 162 Photochemistry of aromatic compounds 168 Kazuhiko Mizuno 1 Introduction 168 2 Isomerization reactions 168 3 Addition and cycloaddition reactions 173 4 Substitution reactions 180 5 Intramolecular cyclization reactions 183 6 Inter- and intra-molecular dimerization reactions 189 7 Lateral-nuclear rearrangements 202 References 203 Functions containing a heteroatom different from oxygen 210 Angelo Albini and Elisa Fasani 1 Nitrogen containing functions 210 2 Functions containing different heteroatoms 226 References 230 Inorganic aspects and solar energy conversion Photophysics of transition metal complexes 234 Francesco Barigelletti 1 Introduction 234 2 Ruthenium 234 3 Osmium 240 4 Rhenium 241 5 Iridium 243 6 Rhodium 247 7 Platinum 248 8 Palladium 250 9 Copper 251 10 Gold 252 Photochemistry, 2011, 38, vii–xi | ix