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Self‐Assembly of Nanosize Coordination Cages on Si(100) Surfaces
Author(s) -
Busi Marco,
Laurenti Marco,
Condorelli Guglielmo G.,
Motta Alessandro,
Favazza Maria,
Fragalà Ignazio L.,
Montalti Marco,
Prodi Luca,
Dalcanale Enrico
Publication year - 2007
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.200700496
Subject(s) - cavitand , pyrene , silicon , fluorescence , x ray photoelectron spectroscopy , hydrosilylation , materials science , nanostructure , ligand (biochemistry) , nanoscopic scale , chemistry , photochemistry , nanotechnology , chemical engineering , supramolecular chemistry , molecule , organic chemistry , optics , biochemistry , physics , receptor , engineering , catalysis
Bottom‐up fabrication of 3D organic nanostructures on Si(100) surfaces has been achieved by a two‐step procedure. Tetradentate cavitand 1 was grafted on the Si surface together with 1‐octene (Oct) as a spatial spectator by photochemical hydrosilylation. Ligand exchange between grafted cavitand 1 and self‐assembled homocage 2 , derived from cavitand 5 bearing a fluorescence marker, led to the formation of coordination cages on Si(100). Formation, quantification, and distribution of the nanoscale molecular containers on a silicon surface was assessed by using three complementary analytical techniques (AFM, XPS, and fluorescence) and validated by control experiments on cavitand‐free silicon surfaces. Interestingly, the fluorescence of pyrene at ≈4 nm above the Si(100) surface can be clearly observed.