%0 Journal Article %T Zwitterionic [4]helicene: a water-soluble and reversible pH-triggered ECD/CPL chiroptical switch in the UV and red spectral regions %+ Université de Genève = University of Geneva (UNIGE) %+ University of Pisa - Università di Pisa %+ Institut des Sciences Chimiques de Rennes (ISCR) %+ Institut Universitaire de France (IUF) %+ Chimie Et Interdisciplinarité : Synthèse, Analyse, Modélisation (CEISAM) %A Pascal, Simon %A Besnard, Céline %A Zinna, Francesco %A Di Bari, Lorenzo %A Le Guennic, Boris %A Jacquemin, Denis %A Lacour, Jérôme %Z We thank the University of Geneva and the Swiss National Science Foundation for financial support. %< avec comité de lecture %@ 1477-0520 %J Organic & Biomolecular Chemistry %I Royal Society of Chemistry %V 14 %N 20 %P 4590-4594 %8 2016 %D 2016 %R 10.1039/c6ob00752j %M 27139039 %Z Chemical Sciences/Organic chemistryJournal articles %X The chiroptical switching properties of a readily accessible and water-soluble diaza [4]helicene are disclosed. This zwitterionic dye displays pH-dependent absorption and emission properties and this enables a reversible turn on/off of electronic circular dichroism at 300 nm and of circularly polarized luminescence in the red region upon protonation/deprotonation. %G English %2 https://univ-rennes.hal.science/hal-01319873/document %2 https://univ-rennes.hal.science/hal-01319873/file/Zwitterionic%20%5B4%5DHelicene_accepted.pdf %L hal-01319873 %U https://univ-rennes.hal.science/hal-01319873 %~ UNIV-NANTES %~ UNIV-RENNES1 %~ CNRS %~ INSA-RENNES %~ ENSC-RENNES %~ ISCR %~ ISCR-CTI %~ STATS-UR1 %~ UR1-SPM %~ GENCI %~ INC-CNRS %~ UR1-UFR-SPM %~ UR1-HAL %~ UR1-SDLM %~ TEST-UNIV-RENNES %~ TEST-UR-CSS %~ UNIV-RENNES %~ INSA-GROUPE %~ UR1-MMS %~ CEISAM %~ NANTES-UNIVERSITE %~ UNIV-NANTES-AV2022 %~ TEST2-HALCNRS