A deeper look into the photocycloreversion of a yellow diarylethene photoswitch: why is it so fast?
Literature Information
Arkadiusz Jarota, Ewa Pastorczak, Halina Abramczyk
Although photoreaction quantum yields of photoswitches determine their switching efficiency, the rates of those reactions are essential parameters because they can establish the eventual temporal resolution of the device using the switch. 1,2-Bis(3,5-dimethylthiophen-2-yl)hexafluorocyclopentene (DMT) features efficient photochromic reactions of both ring-opening and closure and a markedly short time constant of the ring-opening reaction. We have found that the latter is due to the fact that the electronic relaxation from the S1 state of the closed-ring isomer of DMT occurs through a single dissipation channel, leading to a conical intersection in which the DMT molecule possesses open-ring-like geometry.
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Source Journal
Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.












![4-Fluoro-2-(4-{[(3S,4R)-4-(2-hydroxy-2-propanyl)-3-pyrrolidinyl]amino}-6,7-dimethoxy-2-quinazolinyl)phenol hydrochloride (1:1) structure 4-Fluoro-2-(4-{[(3S,4R)-4-(2-hydroxy-2-propanyl)-3-pyrrolidinyl]amino}-6,7-dimethoxy-2-quinazolinyl)phenol hydrochloride (1:1) structure](https://static.chemtradehub.com/structs/143/1431697-96-9-619c.webp)

