Transforming hemithioindigo from a two-way to a one-way molecular photoswitch by isolation in the gas phase
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F18%3A10374852" target="_blank" >RIV/00216208:11310/18:10374852 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1039/c8cp00096d" target="_blank" >https://doi.org/10.1039/c8cp00096d</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1039/c8cp00096d" target="_blank" >10.1039/c8cp00096d</a>
Alternative languages
Result language
angličtina
Original language name
Transforming hemithioindigo from a two-way to a one-way molecular photoswitch by isolation in the gas phase
Original language description
Hemithioindigo compounds are attractive two-way molecular photoswitches combining stilbene and thioindigo parts connected by a C-C double bond. In solution, these photoswitches have been well studied. This study presents the investigation of a hemithioindigo derivative in the gas phase. Visible absorption spectra, measured by standard (visPD) and helium-tagging visible photodissociation (He-visPD) techniques were used to unravel absorption characteristics at the level of isolated molecules at 3 Kelvin. Comparison between the Z and E isomers shows a quite distinctive behavior upon visible light absorption. The Z isomer readily undergoes Z -> E conversion in the gas phase, as evidenced by the changes in the helium-tagging infrared photodissociation (He-IRPD) spectra. Surprisingly, visible light excitation of the E isomer does not lead to efficient E -> Z isomerization unlike in solution. Instead, the ions relax back to their ground state. Influencing the microenvironment of the E isomer by complexation with the highly polar betaine zwitterion resulted in absorption changes, albeit without activating the photoswitching process. Hence, isolation in the gas phase transforms hemithioindigo into a one-way molecular photoswitch. Furthermore, the combination of He-visPD and IRPD spectroscopies proved to be an excellent method for studying photochemical processes such as the double-bond isomerization in the gas phase.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Chemistry Chemical Physics
ISSN
1463-9076
e-ISSN
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Volume of the periodical
20
Issue of the periodical within the volume
10
Country of publishing house
GB - UNITED KINGDOM
Number of pages
9
Pages from-to
6868-6876
UT code for WoS article
000429286100011
EID of the result in the Scopus database
2-s2.0-85043520697