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Cobalt(II) acetylacetonate complex immobilized on aminosilane-modified SBA-15 as an efficient catalyst for epoxidation of trans-stilbene with molecular oxygen
Tang, Qinghu1,2; Wang, Yanyan2; Zhang, Jian2; Qiao, Ran2; Xie, Xiaopei2; Wang, Yi3; Yang, Yanhui1
2016-06-01
Source PublicationAPPLIED ORGANOMETALLIC CHEMISTRY
ISSN0268-2605
Volume30Issue:6Pages:435-440
AbstractFrom environmental and economic points of view, it is highly desirable to develop a clean and efficient catalytic process to produce epoxides. An attractive approach is to use a solid, recyclable catalyst and molecular oxygen as the oxidant without any sacrificial reductant or other additives. Nonetheless, the catalysts reported up to now still cannot balance catalytic activity with epoxide selectivity. It is of great importance to explore novel catalysts with both high activity and selectivity for the epoxidation of olefins. In this work, cobalt(II) acetylacetonate (Co(acac)(2)) was covalently bonded to the silica surface of SBA-15 molecular sieve by multi-step grafting using 3-aminopropytrimethoxysilane (APTS) as coupling agent. Characterizations with nitrogen physisorption, X-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy and thermogravimetric analysis suggested that the metal complex was successfully immobilized on the aminosilane-modified SBA-15 surface and the channel structure remained intact. The synthesized Co(acac)(2)APTS@SBA-15 catalyst was used in the epoxidation of trans-stilbene (TS) with molecular oxygen. Compared to the sample prepared by the impregnation method as well as Co(acac)(2) solutions under the same reaction conditions, the Co(acac)(2) immobilized catalyst exhibited remarkably higher TS conversion and trans-stilbene oxide (TSO) selectivity. An increase in TS conversion with Co content was observed when the Co loading was lower than 0.70% and the 0.70Co(acac)(2)APTS@SBA-15 sample exhibited the best catalytic performance. Up to 50.1% of TS conversion could be achieved within 6 h, affording TSO selectivity as high as 96.7%. The superior catalytic performance of this particular catalyst is attributed to the high activity of the immobilized Co(acac)(2) species on SBA-15. Copyright (C) 2016 John Wiley & Sons, Ltd.
KeywordSba-15 Cobalt Acetylacetonate Trans-stilbene Epoxidation Molecular Oxygen
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1002/aoc.3451
Indexed BySCI
Language英语
WOS KeywordSELECTIVE EPOXIDATION ; MESOPOROUS SILICA ; STYRENE ; ALKENES ; MCM-41 ; AIR
WOS Research AreaChemistry
WOS SubjectChemistry, Applied ; Chemistry, Inorganic & Nuclear
Funding Organizationscientific research key project fund of Department of Education of Henan Province(14A150043) ; Program for Innovative Research Team in Science and Technology in University of Henan Province(15IRTSTHN003) ; National Research Foundation (NRF) ; AcRF Tier 1 grant, Ministry of Education, Singapore(RG129/14) ; Prime Minister's Office, Singapore under its Campus for Research Excellence and Technological Enterprise (CREATE) program
WOS IDWOS:000375998000009
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21087
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.Nanyang Technol Univ, Sch Chem & Biomed Engn, N1-2-B1-18,62 Nanyang Dr, Singapore 637459, Singapore
2.Henan Normal Univ, Minist Educ, Key Lab Green Chem Media & React, Collaborat Innovat Ctr Henan Prov Green Mfg Fine, Xinxiang 453007, Henan, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol Techn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Tang, Qinghu,Wang, Yanyan,Zhang, Jian,et al. Cobalt(II) acetylacetonate complex immobilized on aminosilane-modified SBA-15 as an efficient catalyst for epoxidation of trans-stilbene with molecular oxygen[J]. APPLIED ORGANOMETALLIC CHEMISTRY,2016,30(6):435-440.
APA Tang, Qinghu.,Wang, Yanyan.,Zhang, Jian.,Qiao, Ran.,Xie, Xiaopei.,...&Yang, Yanhui.(2016).Cobalt(II) acetylacetonate complex immobilized on aminosilane-modified SBA-15 as an efficient catalyst for epoxidation of trans-stilbene with molecular oxygen.APPLIED ORGANOMETALLIC CHEMISTRY,30(6),435-440.
MLA Tang, Qinghu,et al."Cobalt(II) acetylacetonate complex immobilized on aminosilane-modified SBA-15 as an efficient catalyst for epoxidation of trans-stilbene with molecular oxygen".APPLIED ORGANOMETALLIC CHEMISTRY 30.6(2016):435-440.
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