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|
| Type |
Symposium |
| Area |
Recent Trends in Porous Inorganic Materials |
| Room No. |
Samda Hall B |
| Time |
FRI 16:00-: |
| Code |
INOR3-5 |
| Subject |
New Proton Conducting Media in Porous Metal-Organic Frameworks |
| Authors |
Dae-Woon Lim, Hiroshi Kitagawa*
Department of chemistry,Graduate school of Science, Kyoto University, Japan
|
| Abstract |
The porous crystalline metal-organic frameworks (MOFs), tunable solid constructed by metal ion and organic linker, are emerging as a new class of solid state proton conductor because of their high porosity and capability as an adsorbent. Its good proton conducting performance (~10-2Scm-1) can be achieved by efficient hydrogen bonding between the framework and guest molecules filling pore in which the conducting media plays a crucial role. Water is a well known conducting media exhibiting small molecular size and efficient hydrogen bonding with two proton donor and two acceptor sites. As a result, the hydrogen bonding in MOFs between guest or lattice water molecules and various functional groups of the organic linker is thought to be a possible conduction pathway.
Herein, we demonstrate the ammonia mediated proton conductor in MOFs. Even though it is not chemically identical to water, it has a most similar molecular system in terms of size and hydrogen bonding. We found the highly enhanced proton conductivity in MOFs through the cooperative ammonia adsorption. In addition, the structure analysis by powder Rietveld refinement and dynamic behavior of ammonia in the pore helps to understand their proton conduction mechanism. |
| E-mail |
limdaewoon@gmail.com |
|
121st General Meeting of the KCS