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题名: Adjusting the Acid Strength of Hybrid Solid Acids in Confined Nanospace
作者: Zhang, Xiaomin1, 2;  Xiao, Bing1;  Chen, Jingjing1;  Guo, Miao1, 2;  Yang, Qihua1
关键词: Solid acid ;  Acid strength ;  Yolk-shell ;  Sulfonated polystyrene ;  Esterification
刊名: TOPICS IN CATALYSIS
发表日期: 2016-12-01
DOI: 10.1007/s11244-016-0696-6
卷: 59, 期:19-20, 页:1748-1756
收录类别: SCI ;  ISTP
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical
英文摘要: The acid strength is one of the most important issues in solid acid. Herein, we report an efficient strategy for controlling the acid strength of sulfonated polystyrene (PS-SO3H) within mesosilica hollow nanospheres. The sulfonation of PS@SiO2 core-shell nanospheres with surfactant un-removed, partially removed and totally removed results in the formation of PS-SO3H@SiO2 with core-shell, yolk-shell and hollow nanostructures, respectively. The results of P-31 MAS NMR using triethylphosphine oxide as a base probe molecule show that the acid strength of solid acids depends on their nanostructures. The yolk-shell and hollow nanostructures respectively afford the strongest and the weakest acid strength, suggesting the different aggregation degree of PS-SO3H confined in nanospace during the sulfonation process. All the solid catalysts afford much higher activity than Amberlyst resin in esterification reaction. The yolk-shell nanostructured solid acid with the strongest acid strength shows the highest activity, suggesting the positive effect of the acid strength on the catalytic activity.
关键词[WOS]: ION-EXCHANGE-RESINS ;  ETHYL OCTYL ETHER ;  HETEROGENEOUS CATALYSIS ;  MESOPOROUS SILICA ;  PROBE MOLECULES ;  STATE NMR ;  ESTERIFICATION ;  CYCLOHEXENE ;  SELECTIVITY ;  ALKYLATION
语种: 英语
WOS记录号: WOS:000388825800009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/150447
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, 457 Zhongshan Rd, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Zhang, Xiaomin,Xiao, Bing,Chen, Jingjing,et al. Adjusting the Acid Strength of Hybrid Solid Acids in Confined Nanospace[J]. TOPICS IN CATALYSIS,2016,59(19-20):1748-1756.
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