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Open seminar

Lecture Title "π-Electronic Ion-Pairing Supramolecular Assemblies"
Date Wednesday 29 July 2015 10:00 to 11:30
Lecturer Professor Hiromitsu Maeda
(College of Pharmaceutical Sciences, Ritsumeikan University)
Place

Seminar room, 2nd floor floor, Building 3, Yamate Area
Summary

π-Electronic systems responsive to metal ions and anions are very fascinating because they can form a variety of ion complexes as building subunits, providing supramolecular assemblies that exhibit attractive electronic and electrooptical properties.[1]  In fact, anion complexes of the anion-responsive p-systems, such as dipyrrolyldiketone boron complexes and related molecules, have been found to construct ion-pairing assembled structures as crystals, supramolecular gels, and thermotropic liquid crystals by combination with cationic species.  Derived from favorable overlap of charged p-planes, ion-pairing assemblies with the contribution of charge-segregated arrangements provided charge carrier mobilities, which are often larger than corresponding charge-by-charge-based assemblies, showing superior semi-conductive properties.  Recent achievements in arylethynyl-substituted anion receptors include the formation of a variety of highly ordered structures, such as totally charge-segregated assemblies, based on [1 + 1]-type planar and [2 + 1]-type interlocked anion complexes.[2]


[1] Maeda, H. Bull. Chem. Soc. Jpn. 2013, 86, 1359–1399. 
[2] Yamakado, R.; Sakurai, T.; Matsuda, W.; Seki, S.; Yasuda, N.; Akine, S.; Maeda, H. to be submitted. 
Contact

Donglin JIANG, Ph. D
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