内容紹介

Host-guest chemistry has witnessed a renaissance under the name ‘supramolecular chemistry’ since the award of Nobel Prize to Cram, Lehn and Pederson. During the last five decades ‘supramolecular chemistry’ has enabled the visualization and exploitation of weak interactions toward altering the chemical and physical behavior of a molecule. It has aided in threading several concepts of host-guest chemistry that have existed for over a century. Enclosing a molecule (guest) within another molecule (host) ‘tames’ the former to result in a behavior different from that in solution. In general, the chemical and physical behavior of a molecule within a confined space (cage, cavity, capsule, box, container etc.) is defined by the size and free space within the container, the dynamics of the container, weak interactions between the container and the content, and the content’s restricted freedom. This talk will illustrate with examples the remarkable changes in the photochemical properties of different molecules on placing them within a water-soluble cavitand trivially known as octa acid. Common organic molecules such as olefins, carbonyls and aromatics are used as the contents/guests. The products of resulting altered photoreactions include oxidation, dimerization, geometric isomerization, Norrish Type I reactions and electrocyclic reactions. The primary goal is to demonstrate the different behavior of molecules when enclosed in a space not much larger than itself.

詳細情報

刊年

2014

形態

電子化映像資料(1時間23分26秒)

シリーズ名

光ナノサイエンス特別講義 ; 平成26年度

注記

講演者所属: Department of Chemistry, University of Miami, U.S.A

講演日: 平成26年10月23日

講演場所: 物質創成科学研究科大講義室

標題言語

日本語 (jpn)

本文言語

日本語 (jpn)

著者情報

V.Ramamurthy