Seminar

Seminar

[세미나 공지] - 2014년 3월 27일(목)

  • POSTED DATE : 2014-03-25
  • WRITER : 관리자
  • HIT : 2459
  • DATE : 2014-03-27
  • PLACE : 330226호

다음주 목요일(3월27일)에 세미나가 개최됩니다.

많은 참석 부탁드립니다.
감사합니다.

 

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제  목 : Torsionally-Responsive Molecules and Assemblies: Mechanism-Based Design of Fluorescent Sensors and Switches 

 

연  사 : 이동환 교수(서울대학교)
 

일  시 : 2014년 3월 27일(목) 오후 4시 30분


장  소 : 화학관 세미나실 (330226호실)

 

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Torsionally-Responsive Molecules and Assemblies: Mechanism-Based Design of Fluorescent Sensors and Switches

 

Dongwhan Lee

Department of Chemistry, Seoul National University, Seoul, KOREA 151-747

dongwhan@snu.ac.kr

 

 

An increasing number of functional materials are built with π-conjugated chemical architectures. The practical utility of such constructs derives from rich optical and electrochemical properties that are inherent to their extended electronic structures, and the ability to manipulate them by either covalent or non-covalent synthetic modifications. Taking inspirations from the mode of operation of certain transmembrane protein complexes, we have devised a simple mechanical coupling scheme that correlates torsional motions of multiple aromatic groups that interact through a symmetric array of hydrogen bonds. The assembly and disassembly of multiple non-covalent contacts within such branched π-conjugation result in a dramatic switching of fluorescence properties. Taking this concept a step further, we are currently exploring stimuli-responsive chromophores and receptors, in which restricted torsional motions along the π-conjugated molecular backbone can be exploited for reactivity-based detection of biologically/environmentally relevant molecules and ions. In this presentation will be discussed the advent of this chemistry, its current progress, and future developments.