Premium
Surface‐Confined Single Molecules: Assembly and Disassembly of Nanosize Coordination Cages on Gold (111)
Author(s) -
Menozzi Edoardo,
Pinalli Roberta,
Speets Emiel A.,
Ravoo Bart Jan,
Dalcanale Enrico,
Reinhoudt David N.
Publication year - 2004
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200305570
Subject(s) - cavitand , monolayer , chemistry , molecule , crystallography , thioether , cage , self assembly , self assembled monolayer , atomic force microscopy , nanotechnology , stereochemistry , materials science , supramolecular chemistry , organic chemistry , mathematics , combinatorics , biochemistry
A cavitand functionalized with four alkylthioether groups at the lower rim, and four tolylpyridine groups on the upper rim is able to bind to a gold surface by its thioether groups, and forms a coordination cage with [Pd(dppp)(CF 3 SO 3 ) 2 ] by its pyridine groups. The cavitand or the cage complex can be inserted from solution into a self‐assembled monolayer (SAM) of 11‐mercaptoundecanol on gold. The inserted molecules can be individually detected as they protrude from the SAM by atomic force microscopy (AFM). The cages can be reversibly assembled and disassembled on the gold surface. AFM can distinguish between single cavitand and cage molecules of 2.5 nm and 5.8 nm height, respectively.