4.8 Article

Self-Assembly of a Dendron-Attached Tetrathiafulvalene: Gel Formation and Modulation in the Presence of Chloranil and Metal Ions

Journal

SMALL
Volume 8, Issue 4, Pages 578-584

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201101917

Keywords

self-assembly; molecular responsive gels; redox reactions; tetrathiafulvalene; chloranil

Funding

  1. NSFC
  2. State Basic Program
  3. Chinese Academy of Sciences
  4. NSFC-DFG [TRR61]

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The self-assembly of a tetrathiafulvalene (TTF)-based molecular gelator with a dendron substituent into a gel is described. Scanning electron microscope and atomic force microscope studies show that the xerogels exhibit rope-like frameworks or interwoven nanofibers, depending on the polarity of solvent from which the gel is formed. Gels containing chloranil can also be successfully prepared. Interestingly, this two-component gel can be easily transformed into solution after the addition of either Sc3+ or Pb2+. Both absorption and electron spin resonance (ESR) spectroscopic investigations reveal that the TTF unit is oxidized into TTF.+ by chloranil in the presence of either Sc3+ or Pb2+. Moreover, the gel phase can be restored by reduction of TTF.+ into the neutral form using magnesium.

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