DSpace Repository

Infra-red Studies of Reactions on Oxide Surfaces: Part 1.— Boron Trifluoride on Silica

Show simple item record

dc.contributor.author Morrow, B. A.
dc.contributor.author Devi, A.
dc.date.accessioned 2025-02-04T14:34:59Z
dc.date.available 2025-02-04T14:34:59Z
dc.date.issued 1972
dc.identifier.uri http://dspace.bits-pilani.ac.in:8080/jspui/handle/123456789/17166
dc.description.abstract Infra-red spectroscopy has been used to study the adsorption of boron trifluoride on silica. On highly dehydroxylatcd samples chemisorption is rapid and the major product initially appears to be a surface SiOBF2 species. This species is also formed when BF3 interacts wtih totally dehydroxylatcd silicas which have been prepared by heating silica in vacuum at about 1250cC. Spectroscopic evidence indicates that on highly or totally dehydroxylatcd silica, BF3 preferably reacts with a new reactive site, probably a siloxane bridge site, which is formed as a result of the removal of the surface silanol groups during heating. Only after the reaction is complete on the “ siloxane ” sites docs chemisorption take place with silanol groups if these are present. During prolonged evacuation the surface SiOBF2 groups react further with trace amounts of water to produce (SiO)2BF groups; the latter arc also produced during the initial stages of chemisorption when the silanol concentration is high. When water or air is admitted after chemisorption of BF3, a spectrum characteristic of boric acid is observed. en_US
dc.language.iso en en_US
dc.publisher Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1972, 68 (3) en_US
dc.subject Chemistry en_US
dc.subject Infra-red Studies en_US
dc.subject Oxide Surfaces en_US
dc.subject Journal of the Chemical Society : Faraday Transaction - I en_US
dc.title Infra-red Studies of Reactions on Oxide Surfaces: Part 1.— Boron Trifluoride on Silica en_US
dc.type Article en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Advanced Search

Browse

My Account