期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 1, 期 18, 页码 5517-5523出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta10477j
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资金
- Mid-career Researcher Program [NRF-2012-045064]
- WCU program [R31-2008-10029]
- NRF of Korea
- MEST
- Priority Research Centers Program [NRF-2012-1040282]
- Hydrogen Energy RD Center
- 21st century Frontier RD Program
- National Research Foundation of Korea [2009-0094023, 2012R1A2A2A01045064] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This work shows that porous solid systems for catalytic carbon dioxide fixation can be developed by a direct assembly of metal-salen containing building blocks with organic connectors through a carbon-carbon bond formation reaction. For use as a dihalo building block, Al, Cr, Co-salen building blocks with two iodo groups were prepared. Sonogashira coupling of these building blocks with tetra(4-ethynylphenyl) methane resulted in microporous organic networks (MONs) bearing Al, Cr, and Co-salen species (Al-MON, Cr-MON, Co-MON). Scanning electron microscopy (SEM) showed that the materials had granular or spherical shapes. Brunauer-Emmett- Teller ( BET) analysis revealed surface areas of up to 522-650 m(2) g(-1), and microporosity (<2 nm). The thermal stability of the materials was dependent on the degree of networking. Their chemical components were characterized by solid-phase 13C-nuclear magnetic resonance spectroscopy (NMR) and X-ray photoelectron spectroscopy (XPS). The materials containing metal-salen (M-MON) showed excellent chemical conversion of carbon dioxide with epoxide to cyclic carbonates under mild conditions ( 60 C and 1 MPa CO2). Among the M-MONs, the Co-MON showed the best reactivity for carbon dioxide conversion to cyclic carbonates with 1400-1860 TON and 117-155 h(-1) TOF. The size effect of epoxides in CO2 fixation was observed due to the microporosity of Co-MON.
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