Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 16, Issue 35, Pages 10744-10751Publisher
WILEY-BLACKWELL
DOI: 10.1002/chem.200903575
Keywords
gels; luminescence; quinacridone; stimuli-responsive assembly; supramolecular chemistry
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Funding
- National Natural Science Foundation of China [50733002, 50903037, 20772045]
- Major State Basic Research Development Program [2009CB939700]
- 111 Project [B06009]
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In investigations into the effects of environmental factors on organogels, two urea-functionalized quinacridone derivatives 1a and 1b have been designed and synthesized. These two compounds can respond to ultrasound and thermal stimuli in the organic test solvents, and exhibit pronounced aggregation properties. The field-effect (FE)-SEM images of xerogels show the characteristic gelation morphologies of 3D fibrous network structures. The concentration- and temperature-dependent (1)H NMR spectra suggest that the intermolecular pi-pi and hydrogen-bonding interactions of gelators are the main driving forces for the supramolecular assembly process. X-ray diffraction (XRD), UV/Vis absorption, and photoluminescent spectroscopy studies have been carried out and provide more information to define the molecular packing model in gelation states.
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