Adjusting the Acid Strength of Hybrid Solid Acids in Confined Nanospace

	Adjusting the Acid Strength of Hybrid Solid Acids in Confined Nanospace
	Guo, Miao 1,2; Zhang, Xiaomin 1,2; Xiao, Bing 1; Chen, Jingjing 1; Yang, Qihua 1
刊名	TOPICS IN CATALYSIS
	2016-12-01
卷号	59 期号:19-20 页码:1748-1756
关键词	Solid acid Acid strength Yolk-shell Sulfonated polystyrene Esterification
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.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Chemistry, Applied ; Chemistry, Physical
关键词[WOS]	ION-EXCHANGE-RESINS ; ETHYL OCTYL ETHER ; HETEROGENEOUS CATALYSIS ; MESOPOROUS SILICA ; PROBE MOLECULES ; STATE NMR ; ESTERIFICATION ; CYCLOHEXENE ; SELECTIVITY ; ALKYLATION
收录类别	SCI ; ISTP
语种	英语
WOS记录号	WOS:000388825800009
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/150447]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
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
推荐引用方式 GB/T 7714	Guo, Miao,Zhang, Xiaomin,Xiao, Bing,et al. Adjusting the Acid Strength of Hybrid Solid Acids in Confined Nanospace[J]. TOPICS IN CATALYSIS,2016,59(19-20):1748-1756.
APA	Guo, Miao,Zhang, Xiaomin,Xiao, Bing,Chen, Jingjing,&Yang, Qihua.(2016).Adjusting the Acid Strength of Hybrid Solid Acids in Confined Nanospace.TOPICS IN CATALYSIS,59(19-20),1748-1756.
MLA	Guo, Miao,et al."Adjusting the Acid Strength of Hybrid Solid Acids in Confined Nanospace".TOPICS IN CATALYSIS 59.19-20(2016):1748-1756.