%0 Journal Article %T Changing gears to neutral in a polymorph of one-dimensional arrays of cogwheel-like pairs of molecular rotors %+ MOLTECH-Anjou %A Bastien, Guillaume %A Lemouchi, Cyprien %A Allain, Magali %A Wzietek, Pawel %A Rodríguez-Fortea, Antonio %A Canadell, Enric %A Iliopoulos, Konstantinos %A Gindre, Denis %A Chrysos, Michel %A Batail, Patrick %< avec comité de lecture %J CrystEngComm %V 16 %N 7 %P 1241-1244 %8 2014 %D 2014 %R 10.1039/c3ce42054j %Z Chemical SciencesJournal articles %X

We report on a polymorph (2) of an amphidynamic crystal of molecular rods with two helical 1,4-bis(ethynyl)bicyclo[2.2.2]octane rotators where half of the rod-like molecules appear to be shifted with respect to their closest neighbours. This translation takes cogwheel-like pairs of rotators apart in the lattice in such a way that their motion becomes uncorrelated. This property is to be contrasted with the highly correlated motion found to govern the rotators in a recently-published polymorph 1 of the same material. As with polymorph 1, this motion is shown to take place independently of mutations in the handedness of the rotators and of the ‘mutamer’-induced second harmonic generation.

%G English %2 https://univ-angers.hal.science/hal-03344840/document %2 https://univ-angers.hal.science/hal-03344840/file/just_accepted_c3ce42054j.pdf %L hal-03344840 %U https://univ-angers.hal.science/hal-03344840 %~ CNRS %~ UNIV-ANGERS %~ INC-CNRS %~ MOLTECH-ANJOU