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Determination of amino and silanol functional groups on glass via chemical derivatization and ESCA
Author(s) -
Dang Tuan A.,
Gnanasekaran Ramaswamy
Publication year - 1990
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.740150209
Subject(s) - silanol , derivatization , chemistry , silylation , silane , chromatography , organic chemistry , high performance liquid chromatography , catalysis
The ESCA analysis of surface silanol (Si‐OH) and amino (NH 2 ) functional groups on glass is either not possible or very ambiguous. These functional groups can be identified positively by using chemical derivatization in conjunction with ESCA. In addition to specificity, the technique also offers a significant decrease in detection limit. The NH 2 was derivatized using penta‐fluorobenzaldehyde (PFB) and the Si‐OH was silylated with tridecafluoro‐1,1,2,2‐tetrahydrooctyl‐1‐trichloro‐ silane (TDFS). Quantification of the NH 2 group can be accomplished with PFB derivatization. Only a relative comparison of the silanol group on glass can be carried out in TDFS silylation owing to the uncertainty in the completion of this reaction in the ESCA sampling depth.