| 학회 |
한국화학공학회 |
| 학술대회 |
2015년 봄 (04/22 ~ 04/24, 제주 ICC) |
| 권호 |
21권 1호, p.1084 |
| 발표분야 |
촉매 및 반응공학 |
| 제목 |
An Aluminophosphate Molecular Sieve with 36 Crystallographically Distinct Tetrahedral Sites |
| 초록 |
We report that a new medium-pore AlPO4 molecular sieve denoted PST-6 (POSTECH number 6) has 36 crystallographically-distinct tetrahedral sites (T-sites) in the asymmetric unit. PST-6 was prepared by calcination of another new aluminophosphate (AlPO4) material with an unknown structure synthesized using diethylamine as a structure-directing agent, which is thought to contain bridging hydroxyl groups. Its structure has been determined and refined by a combination of electron crystallography, X-ray powder diffraction, and computer simulation. Leaving aside SSZ-57 (*SFV), a modulated zeolite whose “idealized” unit cell possesses 99 symmetrically independent T-sites, PST-6 is crystallographically more complex than any zeolitic material known. It is also the first medium-pore material which contains a one-dimensional pore system consisting of parallel 10- and 8-ring channels. This shows that novel, highly complex zeolite structures that contain even-numbered rings only can arise at a simple AlPO4 composition. |
| 저자 |
이준규1, Alessandro Turrina2, Liangkui Zhu3, 서승완1, Daliang Zhang3, Paul A. Cox4, Paul A. Wright2, Shilun Qiu3, 홍석봉1
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| 소속 |
1POSTECH, 2Univ. of St. Andrews, 3Jilin Univ., 4Univ. of Portsmouth |
| 키워드 |
aluminophosphates; microporous materials; structure elucidation; tetrahedral sites; zeolites
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| E-Mail |
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| 원문파일 |
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