| Autor: |
Morita, Masashi, Kusaka, Shinpei, Yonezu, Akira, Ohara, Yuki, Sakamoto, Hirotoshi, Matsuda, Ryotaro |
| Zdroj: |
Chemistry Letters; April 2021, Vol. 50 Issue: 4 p640-643, 4p |
| Abstrakt: |
Here we report enhanced CO2molecular recognition ability by incorporating insertion reaction into a metal porphyrin complex in a metal-organic framework (MOF). PCN-222(Cu)-INA was synthesized by the reaction of PCN-222(Cu) [Zr6O8(H2O)8(Cu-TCPP)2], where Cu-TCPP = Cu(II) tetrakis(4-carboxyphenyl)porphyrin, and isonicotinic acid (INA). PCN-222(Cu)-INA exhibited a 1.5 times larger CO2adsorption amount than PCN-222(Cu) at 298 K and 1 bar. The mechanism involving insertion reaction of CO2into Cu–N bonds enhanced the adsorption, which was revealed by in situIR spectroscopy and theoretical calculations.Here we report enhanced CO2adsorption by insertion reaction in Cu porphyrin-based metal–organic frameworks. To enhance CO2affinity, the accessible metal ion sites (AMSs) of porphyrin units were modified by post-synthetic reaction with isonicotinic acid (INA). The mechanism of the enhancement of CO2adsorption was revealed by in situIR spectroscopy that showed reversible insertion reaction of CO2into Cu–N bonds, which was also supported by theoretical calculations. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
