Triggering the dynamics of a carbazole-p-[phenylene-diethynyl]-xylene rotor through a mechanically induced phase transition. Issue 93 (6th November 2019)

• Record Type: Journal Article
• Authors: Aguilar-Granda, Andrés; Colin-Molina, Abraham; Jellen, Marcus J.; Núñez-Pineda, Alejandra; Cifuentes-Quintal, M. Eduardo; Toscano, Rubén Alfredo; Merino, Gabriel; Rodríguez-Molina, Braulio
• Is Part Of: Chemical communications. Volume 55:Issue 93(2019)
• Page Start: 14054
• Page End: 14057
• Publication Date: 2019-11-06
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c9cc05672f
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : A crystalline molecular machine with several solid phases where only one is able to show intramolecular rotation. Abstract : A new rotor exhibits rich solvatomorphism behavior with eight X-ray structures obtained. A heterogeneous solid obtained by mechanical stress exhibited a dominant isotropic 2 H 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 × 10 10 s −1, which indicates that the motion requires the distortion of the molecular axis.