报告题目：Dynamic Supramolecular Structures in the Crystalline State

报告人：Takayoshi NAKAMURA 中村贵义教授

主持人：韩宏伟教授

时 间：2017年10月19日16:00-17:00

地 点：武汉光电国家实验室(筹)A302

报告摘要：

Supramolecular cations based on crown ethers are promising building blocks for constructing molecular assemblies expressing a variety of functions. We have already reported electronic functions arising from dynamic motion of supramolecular cations in the solid state. A one-dimensional stack of [15]crown-5 with lithium cation in (Li+)x([15]crown-5)[Ni(dmit)2]2 showed a lithium ion conduction in the crystal, which controlled electronic conduction in the [Ni(dmit)2] column. A ferroelectric transition was observed in (mfluoroanilinium+)(dibenzo[18]crown-6)[Ni(dmit)2] due to the flip-flop motion of the aryl group by applying outer

electric field.

Supramolecular rotator cations were embedded in functional anions to form multifunctional crystals. We chose [MnCr(oxalate)3]-complexes as an anion, which is known to form two-dimensional honeycomb structure exhibiting ferromagnetic transition at around 5 K, aiming at constructing multiferroic crystals. Supramolecular cations were also utilized to regulate the cation-anion assembly-structures in the solid state, which strongly affect the functions of crystals. The supramolecular cations formed one-dimensional columnar structure with the disorder of anilinium due to the planar conformation of the crown ether with C2h symmetry. [Ni(dmit)2] anions were inserted in the spaces between

the crown ethers. In case we used a distorted supramolecular cation, (3-AP2+)(dibenzo[30]crown-10) (AP = aminopyridine) , we could induce a chiral space group of the crystal, which can be used to develop chiral magnets.

个人简介：

Takayoshi Nakamura (中村 貴義) 教授是日本北海道大学电子科学研究所纳米光电磁材料专业教授。世界著名材料化学、超分子化学、有机化学专家。在分子性导体、分子性磁体、分子铁电体、分子旋转体、

LB 膜以及多金属氧酸盐等方面有很深入的研究和重要的学术贡献。在 Nature、Nature Mater.、Nature Commun.、J. Am. Chem.

Soc.、Angew. Chem. Int. Ed.以及 Inorg. Chem.等著名期刊发表研究论文280 余篇，其中数十篇为封面论文。他曾担任电子科学研究所院长，日本 JSPS（日本学術振興会）评委，以及获得多项世界著名大学和学会的奖励和荣誉。担任多项国际知名学术会议委员，现为中国东南大学荣誉教授。