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제108회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Investigation of 1-D spin structure and magnetic properties of Cr-doped ETS-10 (ETCrS-10) zeolite[Ⅳ-미발표]

2011년 8월 5일 17시 29분 50초
Ⅳ-INOR.P-110 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 <발표Ⅳ>
저자 및
이희주, 최용남, 윤경병1
한국원자력연구원 중성자과학연구부, Korea
1서강대학교 화학과, Korea

ETS-10 (Engelhard titanosilicate structure 10) is a novel microporous framework titanosilicate for photocatalytic application because it is a semiconductor with photo-excitable titanium units [1]. The structure of ETS-10 consists of orthogonal chains of corner sharing octahedral titanium (TiO6) linked by tetrahedral silicon (SiO4) through bridging oxygen ions. Especially, the TiO6 zig-zag chains are arranged in parallel with~7? separation and have a repeatable ordering along the a-axis in one layer and the b-axis in the next layer. Chromium-containing materials are also known to possess important catalytic properties such as ethylene polymerization and redox catalysis. So, these have been shown that various transition metal ions (Cr, Co, Fe and so on) substituted ETS-10 improve the ability of catalysis [2]. ETCrS-10 is particularly interesting for Cr and Ti ordering structure and spin system of them at low temperature because it has 1-D nano wire structure and intrinsic defects or stacking faults. In this study, we will present the structure and magnetic properties of 1-D spin system from the experimental results of EPR, SQUID, ASMS and neutron diffraction. References : [1] S. Uma, S. Rodrigues, I. N. Martyanov, K. J. Klabunde, Microporous and Mesoporous Materials 67 (2004) 181. [2] P. Brandao, A. Philippou, A. Valente, J. Rocha, M. Anderson, Phys. Chem. Chem. Phys., 3 (2001) 1773.