1] UMR 6200, CNRS, Laboratoire MOLTECH-Anjou, UFR Sciences, Université d'Angers, Bât. K, 2 Boulevard Lavoisier, 49045 Angers, France [2] UPR3228 CNRS/INSA/UJF/UPS, Laboratoire National des Champs Magnétiques Intenses, 31400 Toulouse and 38042 Grenoble, France.
Laboratoire de Physique des Solides, UMR 8502, Université Paris-Sud, Bât. 510, 91405 Orsay, France.
Nat Commun. 2014 May 6;5:3757. doi: 10.1038/ncomms4757.
So far, no effect of chirality on the electrical properties of bulk chiral conductors has been observed. Introduction of chiral information in tetrathiafulvalene precursors represents a powerful strategy towards the preparation of crystalline materials in which the combination of chirality and conducting properties might allow the observation of the electrical magnetochiral anisotropy effect. Here we report the synthesis by electrocrystallization of both enantiomers of a bulk chiral organic conductor based on an enantiopure tetrathiafulvalene derivative. The enantiomeric salts crystallize in enantiomorphic hexagonal space groups. Single crystal resistivity measurements show metallic behaviour for the enantiopure salts down to 40 K, in agreement with band structure calculations. We describe here the first experimental evidence of electrical magnetochiral anisotropy in these crystals, confirming the chiral character of charge transport in our molecular materials.
到目前为止，尚未观察到手性对块状手性导体的电性能的影响。在手性四硫富瓦烯前体中引入手性信息是制备结晶材料的一种有力策略，在手性和导电性能的结合中，可能会观察到电磁手性各向异性效应。在这里，我们通过电结晶报告了基于对映纯四硫富瓦烯衍生物的一种块状手性有机导体的两种对映异构体的合成。对映异构体盐在对映异构的六方空间群中结晶。单晶电阻率测量表明，对映纯盐在 40 K 以下表现出金属行为，与能带结构计算一致。我们在这里描述了在这些晶体中首次实验证明电磁手性各向异性，证实了我们的分子材料中电荷输运的手性特征。
