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  • 03월 02일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Preparation and light-controlled cation detection of rhodamine derivative with spiropyran unit

2012년 2월 17일 16시 08분 19초
ORGN.P-922 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 25일 (수요일) 18:00~21:00
저자 및
신은주, 하종운1
순천대학교 화학과, Korea
1순천대학교 기초의 화학부, Korea
The design and synthesis of artificial receptors for sensing and recognition of heavy transition-metal ions have received considerable attention because these types of metal ions can produce diverse effects for health of human and other living organisms and environments. Spirolactam derivatives of rhodamine dyes are excellent sensing systems because the spirolactam ring-opening process by the addition of metal cation leads to a vivid color change enabling detection with the naked eye and a turn-on fluorescence change. Spiropyran(SP), nonpolar UV-absorbing form, is well-known photochromic compound accomplishing reversible molecular structural changes to merocyanine(MC), polar VIS-absorbing form, by the photochemical ring opening on UV irradiation. In turn, MC is reversed to SP by ring closure thermally or on irradiation of visible light. Reversible photochromic SP-MC transformation is one of subjects of active research on optical memory and switch, on the basis of significant difference in polarity, excited state energy, or molecular geometry between two forms. Spiropyran itself is chemosensor for CN- anion. Incorporating photochromic molecules into chemosensor molecules might lead to a variety of light controlled ion detection systems. In this study, a rhodamine derivative with spiropyran unit was prepared and their light-controlled cation detection was investigated using absorption and fluorescence spectroscopy.