Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 853 - 864 (1987)
Update date:2022-08-11
Topics:
Busca, Guido
Lorenzelli, Vincenzo
Galli, Paola
Ginestra, Aldo La
Patrono, Pasquale
The surface acidity of zirconium phosphate at different stages of dehydration and heat treatments has been studied by Fourier-transform infrared spectroscopy of adsorbed pyridine, acetonitrile and acetone and by catalytic cativity in the isomerization of but-1-ene.Broensted-acidic surface POH and P(OH)2 groups are identified <ν(OH) = 3670-3660 and 3600 cm-1, respectively> whose strenght increases slightly on bulk dehydration.They are thought to be responsible for the activity in but-1-ene isomerization, which also increases during condensation to pyrophosphate.Lewis-acidic sites of medium-high strenght have also been found, and responsible for the formation of chemisorbed forms of pyridine (ν8a = 1610 cm-1), acetonitrile <ν(CN) Fermi resonance doublet at 2322 and 2295 cm-1> and acetone <ν(CO) 1684 cm-1>.Surface ZrOH groups are also detected on the layered ZrP2O7 surface.The results illustrate the role of exposed planes, both parallel and perpendicular to the layered structure.
View MoreTAIXING BEST NEW MATERIALS CO., LTD
Contact:0523-87998158;
Address:No.18 Zhonggang Road，Taixing City ，Jiangsu , China
Qingdao S. H. Huanyu Imp. & Exp. Co., Ltd.
Contact:86-532-88250866
Address:Room 615, World Trade Centre Building B, Hongkong Middle Roda 6#, Qingdao, Shandong, China
Huaian Double Win Chemicals Co.,Ltd.
Contact:+86-13511538872
Address:Blk 43,Greenland Century Town,Huaian District, Huaian City,Jiangsu Province,China
Jinan Trio PharmaTech Co., Ltd
Contact:86-531-88811783；+(0)13153010282
Address:2766 Yingxiu Road, Jinan High-Tech Zone, China
Xi'an caijing Opto-Electrical Science & Technology Co., LTD
Contact:+86-29-88294447
Address:NO.168 Zhangba Rd. East, Xi'an, P.R.China
Doi:10.1021/jo01053a030
(1962)Doi:10.1177/1747519820907563
(2020)Doi:10.1021/ja00064a040
(1993)Doi:10.1016/j.tetasy.2004.05.008
(2004)Doi:10.1016/S0040-4039(01)99152-X
(1968)Doi:10.1016/j.bmcl.2004.02.069
(2004)
