PMID- 34110826 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20210625 LR - 20210625 IS - 1948-7185 (Electronic) IS - 1948-7185 (Linking) VI - 12 IP - 23 DP - 2021 Jun 17 TI - Unlocking the Double Bond in Protonated Schiff Bases by Coherent Superposition of S(1) and S(2). PG - 5639-5643 LID - 10.1021/acs.jpclett.1c01379 [doi] AB - The primary event occurring during the E-to-Z photoisomerization reaction of retinal protonated Schiff base (rPSB) is single-to-double bond inversion. In this work we examine the nuclear dynamics that occurs when the initial excited state is a superposition of the S(1) and S(2) electronic excited states that might be created in a laser experiment. The nuclear dynamics is dominated by double bond inversion that is parallel to the derivative coupling vector of S(1) and S(2). Thus, the molecule behaves as if it were at a conical intersection even if the states are nondegenerate. FAU - Olivucci, Massimo AU - Olivucci M AUID- ORCID: 0000-0002-8247-209X AD - Chemistry Deparment, University of Siena, Via Aldo Moro n. 2, 53100 Siena, Italy. AD - Chemistry Department, Bowling Green State University, Overman Hall, Bowling Green, Ohio 43403, United States. FAU - Tran, Thierry AU - Tran T AUID- ORCID: 0000-0002-0722-0159 AD - Department of Chemistry, University College London, 20 Gordon Street, WC1H 0AJ London, United Kingdom. AD - Department of Chemistry, Molecular Sciences Research Hub, Imperial College, London SW7 2AZ, United Kingdom. FAU - Worth, Graham A AU - Worth GA AUID- ORCID: 0000-0002-2044-4499 AD - Department of Chemistry, University College London, 20 Gordon Street, WC1H 0AJ London, United Kingdom. FAU - Robb, Michael A AU - Robb MA AUID- ORCID: 0000-0003-0478-8301 AD - Department of Chemistry, Molecular Sciences Research Hub, Imperial College, London SW7 2AZ, United Kingdom. LA - eng PT - Journal Article DEP - 20210610 PL - United States TA - J Phys Chem Lett JT - The journal of physical chemistry letters JID - 101526034 SB - IM EDAT- 2021/06/11 06:00 MHDA- 2021/06/11 06:01 CRDT- 2021/06/10 17:13 PHST- 2021/06/11 06:00 [pubmed] PHST- 2021/06/11 06:01 [medline] PHST- 2021/06/10 17:13 [entrez] AID - 10.1021/acs.jpclett.1c01379 [doi] PST - ppublish SO - J Phys Chem Lett. 2021 Jun 17;12(23):5639-5643. doi: 10.1021/acs.jpclett.1c01379. Epub 2021 Jun 10.