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학술발표회초록보기

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  • 09월 12일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제110회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Highly enhanced luminescence property of Tb-doped layered yttrium hydroxynitrate by antenna effect of tungstate anions

등록일
2012년 8월 30일 16시 12분 32초
접수번호
1440
발표코드
MAT.P-1294 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 17일 (수요일) 16:00~19:00
발표형식
포스터
발표분야
재료화학
저자 및
공동저자
이기룡, 변송호
경희대학교 화학과, Korea
Intense green-emission of Y2(OH)5NO3·nH2O:Tb (LYH:Tb) was induced by ‘antenna effect’ of tungstate anions (WO42-). The adsorption of tungstate anions has been completed within a few minutes on LYH:Tb surface. No shift of ( 0 0 l ) reflections in X-ray diffraction patterns and observed W-O vibration modes from infrared spectra indicated that highly enhanced green-emission of LYH:Tb results from an surface adsorption of tungstate anions instead of ion-exchange process in the interlayer space. Based on photoluminescence (PL) spectra, the luminescence property of LYH:Tb is generally quenched by hydroxyl groups coordinated to Y atoms in the intralayer, while the tungstate adsorbed on the surface of LYH:Tb shows a bright green-emission due to the energy transfer from the oxygen to metal charge transfer (OMCT, O2- → W6+) band. Thus, the tungstate groups located on the surface of LYH play a role as light harvesters (such as antenna). These WO42-/LYH:Tb hybrid compounds obtained by simple surface adsorption would have potential applications for various fields, such as optical device, catalyst, and sensor.

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