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Hydrogen Chloride Induced Reorganization of Packing Phases in Self‐assembled Monolayers of n‐Alkanoic Acids on Silver Surface
Author(s) -
Tao YuTai,
Ma LiFang
Publication year - 1994
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199400064
Subject(s) - chemistry , monolayer , deprotonation , self assembly , protonation , phase (matter) , crystallography , chloride , polymer chemistry , inorganic chemistry , organic chemistry , ion , biochemistry
A unique reorganization process, which was induced by HCI treatment of the self‐assembled monolayers of n‐alkanoic acids on silver surfaces, was visualized by polarized reflection absorption IR spectroscopy. The process can be reversible or irreversible, depending on the chain length of the monolayer‐forming acid. Thus for C16 acid, the highly oriented and crystalline monolayer packing phase reorganized reversibly into isotropic microcrystallites. For C8 acid, the ordered packing phase reorganized irreversibly into a disordered, liquid‐like phase. For C24 acid, reversible change in orientation occurred. All changes are due to the protonation‐deprotonation reaction occurring at the binding head group.