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Ultraslow isomerization in photoexcited gas-phase carbon cluster [Formula: see text].

ABSTRACT: Isomerization and carbon chemistry in the gas phase are key processes in many scientific studies. Here we report on the isomerization process from linear [Formula: see text] to its monocyclic isomer. [Formula: see text] ions were trapped in an electrostatic ion beam trap and then excited with a laser pulse of precise energy. The neutral products formed upon photoexcitation were measured as a function of time after the laser pulse. It was found using a statistical model that, although the system is excited above its isomerization barrier energy, the actual isomerization from linear to monocyclic conformation takes place on a very long time scale of up to hundreds of microseconds. This finding may indicate a general phenomenon that can affect the interstellar medium chemistry of large molecule formation as well as other gas phase processes.

SUBMITTER: Saha K 

PROVIDER: S-EPMC5834543 | biostudies-other | 2018 Mar

REPOSITORIES: biostudies-other

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Ultraslow isomerization in photoexcited gas-phase carbon cluster [Formula: see text].

Saha K K   Chandrasekaran V V   Heber O O   Iron M A MA   Rappaport M L ML   Zajfman D D  

Nature communications 20180302 1

Isomerization and carbon chemistry in the gas phase are key processes in many scientific studies. Here we report on the isomerization process from linear [Formula: see text] to its monocyclic isomer. [Formula: see text] ions were trapped in an electrostatic ion beam trap and then excited with a laser pulse of precise energy. The neutral products formed upon photoexcitation were measured as a function of time after the laser pulse. It was found using a statistical model that, although the system  ...[more]