Structural transformation and optical property of fluorescent helical supramolecule formed by non-covalent interactions as utilized in the biological molecular system

2014 Fiscal Year Final Research Report

• Project/Area Number: 23750229
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Organic industrial materials
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: SAKAJIRI Koichi 東京工業大学, 理工学研究科, 特任准教授 (90402213)
• Project Period (FY): 2011-04-28 – 2015-03-31
• Keywords: らせん構造 / 超分子 / 蛍光 / 構造転移 / らせん反転 / 液晶

Outline of Final Research Achievements

Recently, I found that hydrogen-bonded disk-like (phenylethynyl)benzene derivatives with chiral amino acid alkyl ester groups exhibit unique behaviors. Concretely, their molecules form the supramolecular helical coloums having fluorescent properties. In some cases, they show supramolecular helix-sense inversion involving conformational changes. In addition, this morphological transformation is accompanied by a significant change in fluorescent color, which varies over a wide visible range. In this work, these unprecedented behaviors were elucidated by the spectroscopic results and theoretical analyses.

Free Research Field

キラル高分子・超分子