ICCAS OpenIR
Organic reactions and nanoparticle preparation in CO2-induced water/P104/p-xylene microemulsions
Zhang, R; Liu, J; He, J; Han, BX; Wu, WZ; Jiang, T; Liu, ZM; Du, JM
2003-05-23
Source PublicationCHEMISTRY-A EUROPEAN JOURNAL
ISSN0947-6539
Volume9Issue:10Pages:2167-2172
AbstractNanometer-sized gold particles are synthesized by the reduction of HAuCl4 with KBH4 in the CO2-induced microemulsion of (EO)(27)(PO)(61)(EO)(27), (P104; EO = ethylene oxide, PO = propylene oxide)/p-xylene/CO2/H2O. The recovery of gold particles from the microemulsion can be easily accomplished by the venting of CO2, while the surfactant remains in the organic phase. The effect of the molar ratio of the reductant to HAuCl4, the concentration of the reactants, and the molar ratio of water to EO segments (WO) in the reverse micelles on the size of the gold particles is studied. The hydrolysis of benzoyl chloride (BzCl) and p-nitrophenyl chloroformate (NPhCl) has also been carried out in the microemulsion. The results show that the observed rate constants k(obs) of both substrates increase significantly with W-0, and that W-0 has a larger influence on the hydrolysis of BzCl. The different extents of the influence of W-0 on the two reactions can be ascribed to the different reaction mechanisms and the expected changes in nucleophilicity and polarity of water in the reverse micelles.
KeywordCarbon Dioxide Gold Hydrolysis Microemulsions Nanoparticles
DOI10.1002/chem.200204496
Indexed BySCI
Language英语
WOS IDWOS:000183225200004
PublisherWILEY-V C H VERLAG GMBH
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/81086
Collection中国科学院化学研究所
Corresponding AuthorHan, BX
AffiliationChinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Zhang, R,Liu, J,He, J,et al. Organic reactions and nanoparticle preparation in CO2-induced water/P104/p-xylene microemulsions[J]. CHEMISTRY-A EUROPEAN JOURNAL,2003,9(10):2167-2172.
APA Zhang, R.,Liu, J.,He, J.,Han, BX.,Wu, WZ.,...&Du, JM.(2003).Organic reactions and nanoparticle preparation in CO2-induced water/P104/p-xylene microemulsions.CHEMISTRY-A EUROPEAN JOURNAL,9(10),2167-2172.
MLA Zhang, R,et al."Organic reactions and nanoparticle preparation in CO2-induced water/P104/p-xylene microemulsions".CHEMISTRY-A EUROPEAN JOURNAL 9.10(2003):2167-2172.
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