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| Type |
Poster Presentation |
| Area |
Physical Chemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
PHYS.P-96 |
| Subject |
Fabrication and spectroscopic investigation of I2 loaded metal organic framework |
| Authors |
Jaedong Kang, Doo-Sik Ahn1, Hyotcherl Ihee*
Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea
1Institute for Basic Science, Korea
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| Abstract |
Porous functional materials have attracted considerable attentions both in industrial applications and fundamental sciences. Metal-organic frameworks (MOFs), one of the representative classes of the porous functional materials, is periodic porous structures consisting of metal nodes and ligands connecting these nodes and a promising template as a reservoir for reactive guest molecules and catalyst. However, the molecular-level understanding for interactions between guest molecules captured and MOF’s cage has not been much studied so far.
Zeolitic imidazolate framework-8 (ZIF-8) has been subject to a good model system to examine this issues. Recent works reported that ZIF-8 well-captures volatile iodine [1]. ZIF-8 consists of Zn as single metal node and 2-methylimidazole as linker ligand. Because Iodine forms stable charge-transfer complexes with aromatic molecules (2-methylimidazolate in ZIF-8), Iodines are captured in sodalite cage of ZIF-8. The binding sites and possible orientations for iodines were crystallographically identified. In particular, when iodines are confined in cation-rich template, the formation of polyiodide is expected through lattice-directed reaction.
In this study, we have investigated the structures and photochemical behaviors by means of spectroscopic and crystallographic methods. For measuring lattice-directed reaction in frameworks, I2 loaded ZIF-8 thin film is fabricated and the structure and loading efficiency of iodine are characterized by powder X-ray diffraction and thermogravimetric analysis. The lattice-directed reaction dynamics was measured using femtosecond optical transient absorption (TA) spectroscopy as well.
[1] T. M. Nenoff et al, J. Am. Chem. Soc. 133, 12398-12401
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| E-mail |
jdkang0810@gmail.com |
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121st General Meeting of the KCS