DOI: 10.1016/j.jcou.2017.08.011
Scopus记录号: 2-s2.0-85028038419
论文题名: Cyclic carbonate synthesis from CO2 and epoxides over diamine-functionalized porous organic frameworks
作者: Ravi S. ; Puthiaraj P. ; Ahn W.-S.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2017
卷: 21 起始页码: 450
结束页码: 458
语种: 英语
英文关键词: Cyclic carbonates
; Cycloaddition
; Lewis acid
; Porous organic frameworks
; Post-synthesis
Scopus关键词: Aromatic polymers
; Carbon dioxide
; Carbonates
; Catalyst selectivity
; Catalysts
; Cobalt compounds
; Cycloaddition
; Metal ions
; Metals
; Reusability
; Zinc
; Cyclic carbonate synthesis
; Cyclic carbonates
; Lewis Acid
; Mechanistic pathways
; Porous organic frameworks
; Postsynthesis
; Solventless synthesis
; Tetrabutylammonium bromide
; Catalyst activity
英文摘要: Porous aromatic polymers functionalized with ethylenediamine (CBAP-1(EDA)) and then complexed with Zn2+ or Co2+ ions (CBAP-1(EDA-Zn)) and (CBAP-1(EDA-Co) were synthesized and applied as a catalyst for the solventless synthesis of cyclic carbonates from CO2 and epoxides. The properties of the catalysts were examined by various analytical techniques. CBAP-1(EDA) alone enabled the high catalytic conversion of epoxides (>98%) to five-membered cyclic carbonates at 130 °C under solvent-, metal-, and co-catalyst-free conditions with high selectivity. The catalytic activity of CBAP-1(EDA) was enhanced in the presence of a nucleophile and Lewis acidic metal ion sites. Thus, CBAP-1(EDA) with tetrabutylammonium bromide (TBAB) had shown 98% conversion of epoxide at 80 °C and 1 MPa CO2 in 8 h, whereas CBAP-1(EDA-Zn) and CBAP-1(EDA-Co) with TBAB achieved 96% epoxide conversion in 36 h at room temperature (RT). The stability of the catalysts was confirmed by hot-filtering and reusability tests, which demonstrated that the catalysts could be reused for up to five consecutive runs without any noticeable decline in catalytic activity. The synergism between the basic catalytic sites in CBAP-1(EDA) and TBAB and the Lewis metallic sites was explained by the proposed reaction mechanistic pathway covering both high temperature (metal- and halogen-free) and RT conditions (with metal and halogen). © 2017 Elsevier Ltd. All rights reserved. 资助项目: Ministry of Education
; National Research Foundation of Korea
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52634
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Ravi S.,Puthiaraj P.,Ahn W.-S.. Cyclic carbonate synthesis from CO2 and epoxides over diamine-functionalized porous organic frameworks[J]. Journal of CO2 Utilization,2017-01-01,21