TY - JOUR
T1 - Mixed self-assembled monolayers of rigid biphenyl thiols
T2 - Impact of solvent and dipole moment
AU - Kang, Jung F.
AU - Liao, Sheng
AU - Jordan, Rainer
AU - Ulman, Abraham
PY - 1998/9/23
Y1 - 1998/9/23
N2 - The formation of mixed self-assembled monolayers (SAMs) of different 4'- substituted-4-mercaptobiphenyl (with X = CH3, CF3, and SCH3) on gold, from different solvents, has been investigated. Monolayer thickness values, estimated by ellipsometry, contact angle measurements, and external reflection absorption infrared (ERFTIR) spectroscopy confirms that > 90% of the monolayer is formed after 1 h of adsorption. The dielectric constant of the solvent, the permanent dipole moment of the substituted mercaptobiphenyl, their adsorption and desorption kinetics, and their intermolecular dipole- dipole interactions in the SAM were all found to play a crucial role in the final composition of the mixed SAMs.
AB - The formation of mixed self-assembled monolayers (SAMs) of different 4'- substituted-4-mercaptobiphenyl (with X = CH3, CF3, and SCH3) on gold, from different solvents, has been investigated. Monolayer thickness values, estimated by ellipsometry, contact angle measurements, and external reflection absorption infrared (ERFTIR) spectroscopy confirms that > 90% of the monolayer is formed after 1 h of adsorption. The dielectric constant of the solvent, the permanent dipole moment of the substituted mercaptobiphenyl, their adsorption and desorption kinetics, and their intermolecular dipole- dipole interactions in the SAM were all found to play a crucial role in the final composition of the mixed SAMs.
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U2 - 10.1021/ja981187l
DO - 10.1021/ja981187l
M3 - Article
AN - SCOPUS:0032560978
SN - 0002-7863
VL - 120
SP - 9662
EP - 9667
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 37
ER -