Design and synthesis of novel carbazole-spacer-carbazole type conjugated microporous networks for gas storage and separation | |
Qiao, Shanlin1,2; Du, Zhengkun1; Yang, Renqiang1![]() | |
刊名 | JOURNAL OF MATERIALS CHEMISTRY A
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2014 | |
卷号 | 2期号:6页码:1877-1885 |
英文摘要 | Two novel conjugated microporous networks, P-1 and P-2, with carbazole-spacer-carbazole topological model structures, were designed and prepared by FeCl3 oxidative coupling polymerization. Monomer m-1 (fluorenone spacer) was modified with a thiophene Grignard to form the fluorenyl tertiary alcohol monomer m-2, and this step can increase the polymerization branches from four to five and incorporate the polar -OH group into the building block. N-2 adsorption isotherms show that, after modification, the Brunauer-Emmett-Teller (BET) surface area of P-2 (1222 m(2) g(-1)) is two times that of P-1 (611 m(2) g(-1)), and the total pore volume increases 1.63 times from 0.95 to 1.55 at P/P-0 = 0.99. However, the domain pore size (centred at 1.19 nm) and the pore distribution of both networks are not changed. It demonstrates that the domain pore width may be determined by the size of the rigid carbazole-spacer-carbazole backbone, not the degree of crosslinking when the networks were prepared under same polymerization conditions in this system. Hydrogen physisorption isotherms of P-1 and P-2 show that the H-2 storage can be up to 1.05 wt% and 1.66 wt% at 77 K and 1.1 bar, and the isosteric heat is 9.89 kJ mol(-1) and 10.86 kJ mol(-1), respectively. At 273 K and 1.1 bar, the CO2 uptake capacity of P-2 can be up to 14.5 wt% which is 1.63 times that of P-1 under the same conditions. The H-2 and CO2 uptake capacities of P-2 are among the highest reported for conjugated microporous networks under similar conditions. The CO2/CH4 and CO2/N-2 selectivity results indicate that P-1 exhibits a slightly higher separation ability than P-2. There is often a trade-off between absolute uptake and selectivity in other microporous organic polymers. Fine design and tailoring the topological structure of the monomer can change the adsorption isosteric enthalpy and optimize the gas uptake performance. The obtained networks with the carbazole-spacer-carbazole rigid backbone show promise for potential use in clean energy applications and the environmental field. |
WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
类目[WOS] | Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary |
研究领域[WOS] | Chemistry ; Energy & Fuels ; Materials Science |
关键词[WOS] | METAL-ORGANIC FRAMEWORKS ; CARBON-DIOXIDE CAPTURE ; POROUS POLYMER NETWORKS ; ULTRAHIGH SURFACE-AREA ; HYDROGEN STORAGE ; INTRINSIC MICROPOROSITY ; ENERGY APPLICATIONS ; LOW-PRESSURE ; PORE-SIZE ; CO2 |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000329935700037 |
内容类型 | 期刊论文 |
源URL | [http://ir.qibebt.ac.cn/handle/337004/6374] ![]() |
专题 | 青岛生物能源与过程研究所_先进有机功能材料团队 |
作者单位 | 1.Chinese Acad Sci, CAS Key Lab Biobased Mat, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Qiao, Shanlin,Du, Zhengkun,Yang, Renqiang. Design and synthesis of novel carbazole-spacer-carbazole type conjugated microporous networks for gas storage and separation[J]. JOURNAL OF MATERIALS CHEMISTRY A,2014,2(6):1877-1885. |
APA | Qiao, Shanlin,Du, Zhengkun,&Yang, Renqiang.(2014).Design and synthesis of novel carbazole-spacer-carbazole type conjugated microporous networks for gas storage and separation.JOURNAL OF MATERIALS CHEMISTRY A,2(6),1877-1885. |
MLA | Qiao, Shanlin,et al."Design and synthesis of novel carbazole-spacer-carbazole type conjugated microporous networks for gas storage and separation".JOURNAL OF MATERIALS CHEMISTRY A 2.6(2014):1877-1885. |
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