Takudrei

205
Coupled Molecular Switching Processes in Ordered Mono- and Multilayers of Stimuli-Responsive Rotaxanes on Gold Surfaces

T. Heinrich, C.H.-H. Traulsen, M. Holzweber, S. Richter, V. Kunz, S.K. Kastner, S.O. Krabbenborg, J. Huskens, W.E.S. Unger, C.A. Schalley— 2015

Interfaces provide the structural basis for function as, for example, encountered in nature in the membrane-embedded photosystem or in technology in solar cells. Synthetic functional multilayers of molecules cooperating in a coupled manner can be fabricated on surfaces through layer-by-layer self-assembly. Ordered arrays of stimuli-responsive rotaxanes undergoing well-controlled axle shuttling are excellent candidates for coupled mechanical motion. Such stimuli-responsive surfaces may help integrating synthetic molecular machines in larger systems exhibiting even macroscopic effects or generating mechanical work from chemical energy through cooperative action. The present work demonstrates the successful deposition of ordered mono- and multilayers of chemically switchable rotaxanes on gold surfaces. Rotaxane mono- and multilayers are shown to reversibly switch in a coupled manner between two ordered states as revealed by linear dichroism effects in angle-resolved NEXAFS spectra. Such a concerted switching process is observed only when the surfaces are well packed, while less densely packed surfaces lacking lateral order do not exhibit such effects.

Title205
Coupled Molecular Switching Processes in Ordered Mono- and Multilayers of Stimuli-Responsive Rotaxanes on Gold Surfaces
AuthorT. Heinrich, C.H.-H. Traulsen, M. Holzweber, S. Richter, V. Kunz, S.K. Kastner, S.O. Krabbenborg, J. Huskens, W.E.S. Unger, C.A. Schalley
Date20150317
IdentifierDOI 10.1021/ja512654d
Source(s)
CitationJ. Am. Chem. Soc., 2015, 137, 4382-4390
TypeText