Fine-tuning of relative metal-metal distances within highly ordered chiral 2D nanopatterns

Chemistry : a European Journal
Philipp ZellBernhard Rieger

Abstract

The two-dimensional nanopatterning of a series of neutral alkoxy/alkyl-functionalised bis(salicylaldehydato)/bis(aldiminato)copper(II) and -palladium(II) complexes at a liquid/solid (highly oriented pyrolytic graphite, HOPG) interface has been studied by scanning tunnelling microscopy (STM). The relative metal-metal distances were tuned stepwise in two dimensions by ligand design. Exchange of the carbonyl O-atom for NH or N-alkyl units effects different intermolecular interactions such as weak hydrogen bonds and steric effects that determine, together with the van der Waals forces between the alkyl chains, the relative arrangements of the complexes. Further variation of the length and position of the alkoxy side chains as well as the exchange of CuII for PdII affords an absolute fine-tuning of the surface structures. Highly resolved STM images of the resultant highly ordered adlayers allow us to establish detailed models of the molecular 2D arrays and to classify them into three basic chiral pattern types. Homochirality within the individual domains is induced by the highly regular deposition of the prochiral complexes from the same enantiotopic face. In the case of the C12 O-substituted bis(salicylaldiminato) (NH) Cu(II) compl...Continue Reading

References

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Citations

Oct 19, 2007·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Haofei GongDirk Volkmer
May 7, 2009·Dalton Transactions : an International Journal of Inorganic Chemistry·Jochen NiemeyerGerhard Erker
Apr 8, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Claudio GandolfiMartin Albrecht
Sep 17, 2014·Chemistry : a European Journal·Marta Viciano-ChumillasFabien Silly
May 7, 2009·Dalton Transactions : an International Journal of Inorganic Chemistry·Jochen NiemeyerGerhard Erker
Sep 23, 2011·Chemical Communications : Chem Comm·Seokhoon AhnAdam J Matzger
Feb 3, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Claudio GandolfiMartin Albrecht
Aug 1, 2014·Chemical Communications : Chem Comm·Brandon E HirschAmar H Flood
Jun 28, 2008·Journal of the American Chemical Society·Ryota AraiKenji Matsuda
Aug 13, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Florian MögeleBernhard Rieger
Oct 13, 2006·Journal of the American Chemical Society·Yanhu WeiMatthew Zimmt

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