Triggering the dynamics of a carbazole-p-[phenylene-diethynyl]-xylene rotor through a mechanically induced phase transition

A new rotor exhibits rich solvatomorphism behavior with eight X-ray structures obtained. A heterogeneous solid obtained by mechanical stress exhibited a dominant isotropic H-2 line shape at high temperatures. The motion occurs only in the amorphous component of this solid, with an E-a of 7.4 kcal mo...

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Published inChemical communications (Cambridge, England) Vol. 55; no. 93; pp. 14054 - 14057
Main Authors Aguilar-Granda, Andres, Colin-Molina, Abraham, Jellen, Marcus J., Nunez-Pineda, Alejandra, Eduardo Cifuentes-Quintal, M., Alfredo Toscano, Ruben, Merino, Gabriel, Rodriguez-Molina, Braulio
Format Journal Article
LanguageEnglish
Published CAMBRIDGE Royal Soc Chemistry 04.12.2019
Royal Society of Chemistry
Subjects
Carbazoles
Chemistry
Chemistry, Multidisciplinary
Crystallography
Line shape
NMR
Nuclear magnetic resonance
Phase transitions
Physical Sciences
Science & Technology
Xylene
MOLECULAR ROTORS
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Summary:A new rotor exhibits rich solvatomorphism behavior with eight X-ray structures obtained. A heterogeneous solid obtained by mechanical stress exhibited a dominant isotropic H-2 line shape at high temperatures. The motion occurs only in the amorphous component of this solid, with an E-a of 7.4 kcal mol(-1) and a low pre-exponential factor A of 6.22 x 10(10) s(-1), which indicates that the motion requires the distortion of the molecular axis.
Bibliography:ObjectType-Article-1
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content type line 23
ISSN:1359-7345
1364-548X
DOI:10.1039/c9cc05672f