Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/16504
Title: Supramolecular self-assembly of gold rectangles
Authors: WOO MING SHUE, MICHELLE
Keywords: Self-assembly, supramolecuar chemistry, gold complex, surface chemistry, STM, XPS
Issue Date: 14-Jan-2009
Source: WOO MING SHUE, MICHELLE (2009-01-14). Supramolecular self-assembly of gold rectangles. ScholarBank@NUS Repository.
Abstract: In this thesis, two new supramolecular complexes were designed and synthesized. The molecular rectangles possess large cavities. The first molecular rectangle, [Au4(PAnP)2(DPE)2](OTf)4, has a cavity of 8.108 x 19.093 &Aring. The second molecular rectangle, [Au4(PAnP)2(BPE)2](OTf)4, has a cavity of 9.197 x 18.662 &Aring. The electronic absorption and emission spectroscopy of both rectangles have also been studied. Both molecular rectangles are capable of host-guest interactions with aromatic guests such as 9-bromoanthrancene, naphthalene, phenanthrene and pyrene. The emissions of the AuI rectangles were quenched upon guest binding. Another AuI molecular rectangle, [Au4(PAnP)2(bipy)2](OTf)4, which was previously synthesized by our laboratory was used to form a self-organized monolayer on several different substrates such as highly oriented pyrolytic graphite (HOPG), undoped nanocrystalline diamond (u-NCD) and gold. The molecular layer was characterized by several surface techniques such as X-ray photoelectron spectroscopy, ellipsometry, surface fluorescence and scanning tunneling microscopy.
URI: http://scholarbank.nus.edu.sg/handle/10635/16504
Appears in Collections:Master's Theses (Open)

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