TY - JOUR
T1 - Molecular Resolution Images of a Calix[6]arene from Atomic Force Microscopy
AU - Namba, Madoka
AU - Sugawara, Masao
AU - Buhlmann, Philippe
AU - Umezawa, Yoshio
PY - 1995
Y1 - 1995
N2 - To obtain atomic force microscopy (AFM) images of 5,ll,1,23,29,35-hexa-tert-butyl-37,38,39,40,41,-42-hexakishydroxycalix[6]arene, a monolayer containing this macrocycle as well as octadecanol for monolayer stabilization was formed at the air/water interface by meass of the Langmuir—Blodgett (LB) technique. The appropriate choice of the substrate onto which this monolayer was transferred for AFM observation was found to be crucial for high-resolution AFM. Whereas no images of the calix[6]arene deposited onto octadecyltrichlorosilane-treated mica could be obtained, FTS (1H,1H,2H,2H-perfluorodecyltrichlorosilane) treated mica was found to be an ideal substrate for the deposition and AFM observation. The large influence of the substrate on the resolution may be explained by the rigidness of the FTS layer as well as by the fact that the fee lattice of the chemisorbed FTS monolayer is commensurate with the arrangement of £tert-butyl groups of the calix[6]arene. This method of sample preparation made possible the first AFM images of a macrocyclic host compound with molecular resolution and may prove to be of general applicability.
AB - To obtain atomic force microscopy (AFM) images of 5,ll,1,23,29,35-hexa-tert-butyl-37,38,39,40,41,-42-hexakishydroxycalix[6]arene, a monolayer containing this macrocycle as well as octadecanol for monolayer stabilization was formed at the air/water interface by meass of the Langmuir—Blodgett (LB) technique. The appropriate choice of the substrate onto which this monolayer was transferred for AFM observation was found to be crucial for high-resolution AFM. Whereas no images of the calix[6]arene deposited onto octadecyltrichlorosilane-treated mica could be obtained, FTS (1H,1H,2H,2H-perfluorodecyltrichlorosilane) treated mica was found to be an ideal substrate for the deposition and AFM observation. The large influence of the substrate on the resolution may be explained by the rigidness of the FTS layer as well as by the fact that the fee lattice of the chemisorbed FTS monolayer is commensurate with the arrangement of £tert-butyl groups of the calix[6]arene. This method of sample preparation made possible the first AFM images of a macrocyclic host compound with molecular resolution and may prove to be of general applicability.
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U2 - 10.1021/la00002a046
DO - 10.1021/la00002a046
M3 - Article
AN - SCOPUS:0029253827
SN - 0743-7463
VL - 11
SP - 635
EP - 638
JO - Langmuir
JF - Langmuir
IS - 2
ER -