Shinshu University

Event

Lecture

05/31/2010
June 2, 2010 ■GCOE■ Special lecture by Dr. Sanjay Kumar Varshney, Centre for Liquid Crystal Research(CLCR), INDIA

We would like to invite you for Global COE special Lecture on 2 June, 2010. Please welcome Dr.Sanjay Kumar Varshney from Centre for Liquid Crystal Research(CLCR), INDIA.
He will present Discotic liquid crystals as functional materials.
Details as follow.

Date: 2 June, 2010 (Wed)
TIme: 14:40 - 15:40,
Place: Lecture Building, 2F, Room 27

To study the effect of functional group on core, dibenzochrysenes (DBC), a new family of DLCs, are achieved by a conventional method which is developed having several chiral and achiral peripheral aliphatic chains. These compounds exhibit the variety of columnar mesophase over a wide thermal range. We found that such racemic DBC molecules with axial chirality macroscopically segregate into chiral domains. Although the molecule seems to be flat, it is unambiguously demonstrated that the DBC molecules are twisted based on molecular simulation and the VCD results.
To study the effect of terminal linking group, monomers are connected to each other by an alkyl chain, via an ester linkage on one side and an ether linkage on the other side. Indeed, functional discotic dimers and trimers having triphenylene as donor and anthraquinone as electron acceptor moieties, with different functional group, are designed and synthesized. They exhibit variety of nematic and columnar mesophases and these mesophases are stable at room-temperature. However, it is demonstrated that the functional group on the core and terminal linking group has maximum influence on molecular self-assembly. It is also proved that DLCs with usual peripheral chains in periphery exhibit the nematic mesophase at room-temperature.

開催日 2009年6月2日
PDF
詳細はこちらのファイルをご覧下さい。