Polymer(Korea), Vol.42, No.3, 371-376, May, 2018
구리 촉매화 클릭 반응을 통한 새로운 공액 미세 다공성 고분자의 합성 및 이산화탄소 포집 능력
Synthesis of New Conjugated Microporous Polymers via Copper-catalyzed Click Reaction and Their CO2 Capture Ability
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초록
본 연구에서는 1,3,6,8-tetraethynylpyrene(1)과 azido 그룹을 포함하는 1,4-diazidobenzene(2), 4.4'-diazidobiphenyl (3)간의 클릭 반응을 통하여 공액 미세기공 고분자, CMP-1과 CMP-2를 합성하였다. 합성된 폴리머들은 FTIR과 고체상 13C NMR을 통해 그들의 구조를 분석하였고, N2-흡탈착 등온선 및 CO2 흡착 등온선을 통해 표면적 및 이산화탄소 흡착 능력을 측정하였다. 분자의 길이가 더 긴 단량체 3으로 합성된 CMP-2에서 BET 표면적이 증가되고 기공 크기가 감소되는 것이 관찰되었으며 이산화탄소 흡착 결과 298 K에서는 CMP-1과 CMP-2가 비슷한 흡착량을 보였으나 273 K에서는 CMP-2의 흡착량이 CMP-1에 비해 약 1.5배 증가됨이 관찰되었다. CMP-2의 우월한 이산화탄소 흡착성능은 높은 표면적과 이산화탄소 흡착에 적합한 0.4~0.8 nm의 미세 기공의 존재에 기인한다.
In this study, conjugated microporous polymer, CMP-1 and CMP-2, were synthesized via the copper-catalyzed click reaction between 1,3,6,8-tetraethynylpyrene(1) and 1,4-diazidobenzene(2) or 4,4'-diazidobiphenyl(3). The obtained polymers were characterized by FTIR and solid state 13C NMR, and their surface area and carbon dioxide adsorption capacities were measured by N2-adsorption/desorption isotherms and CO2 adsorption isotherms, respectively. The BET surface area was increased and the pore size was decreased in the CMP-2 which is originated from the monomer 3 having a longer molecular length. CMP-1 and CMP-2 exhibited similar CO2 adsorption capacities at 298 K, 1 bar but CMP-2 displayed superior CO2 adsorption ability compared with CMP-1 at 273 K. The enhanced CO2 adsorption ability of CMP- 2 can be attributed to its high surface areas and appropriate pore diameter to capture CO2 molecules.
Keywords:CO2 capture;conjugated microporous polymer;click-reaction;metal-organic frameworks;pore size
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