Giant anisotropic thermal expansion actuated by thermodynamically assisted reorientation of imidazoliums in a single crystal
Giant anisotropic thermal expansion actuated by thermodynamically assisted reorientation of imidazoliums in a single crystal
复制标题
单晶中咪唑鎓热力学辅助重新取向驱动的巨大各向异性热膨胀
DOI:
10.1038/s41467-019-12833-y
复制
发表时间:
2019-10
影响因子:
16.6
通讯作者:
Tao Jun
中科院分区:
文献类型:
--
作者:
Yao Zi Shuo;Guan Hanxi;Shiota Yoshihito;He Chun Ting;Wang Xiao Lei;Wu Shu Qi;Zheng Xiaoyan;Su Sheng Qun;Yoshizawa Kazunari;Kong Xueqian;Sato Osamu;Tao Jun
Materials demonstrating unusual large positive and negative thermal expansion are fascinating for their potential applications as high-precision microscale actuators and thermal expansion compensators for normal solids. However, manipulating molecular motion to execute huge thermal expansion of materials remains a formidable challenge. Here, we report a single-crystal Cu(II) complex exhibiting giant thermal expansion actuated by collective reorientation of imidazoliums. The circular molecular cations, which are rotationally disordered at a high temperature and statically ordered at a low temperature, demonstrate significant reorientation in the molecular planes. Such atypical molecular motion, revealed by variable-temperature single crystal X-ray diffraction and solid-state NMR analyses, drives an exceptionally large positive thermal expansion and a negative thermal expansion in a perpendicular direction of the crystal. The consequent large shape change (~10%) of bulk material, with remarkable durability, suggests that this complex is a strong candidate as a microscale thermal actuating material.
登录
查看更多内容
影响因子:
56.9
作者:
Fortes, A. Dominic;Suard, Emmanuelle;Knight, Kevin S.
通讯作者:
Knight, Kevin S.
影响因子:
3
作者:
Grimme, Stefan
通讯作者:
Grimme, Stefan
影响因子:
16.6
作者:
Zhang, Jinxing;Ke, Xiaoxing;Ramesh, Ramamoorthy
通讯作者:
Ramesh, Ramamoorthy
影响因子:
2.7
作者:
Giannozzi, P.;Andreussi, O.;Baroni, S.
通讯作者:
Baroni, S.
影响因子:
3.1
作者:
Turner, Michael J.;McKinnon, Joshua J.;Spackman, Mark A.
通讯作者:
Spackman, Mark A.