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| A new monopyrrolo-tetrathiafulvalene (monopyrrolo-TTF) based low molecular-mass organic gelators (LMOGs) was synthesized and characterized. The gelator could form a transparent organogel in cyclohexane, while it was soluble in aromatic, haloalkanes, THF, DMF, ethyl acetate, etc. when cooled after heating. And the gel has been thoroughly characterized by using various microscopic techniques including field-emission scanning electron microscopy (FE-SEM), Small-angle X-ray scattering (SAXS), UV-visible and Fourier Transform Infrared Spectroscopy (FT-IR). Also, the gelator reacted with tetracyano-p-quinodimethane (TCNQ) to form the charge-transfer (CT) complex binary organogel in cyclohexane. Experiments results indicated that the molecules arrangement in one- and two-components were rectangular and hexagonal columnar structure, which further stacked into microporous and fiber networks, respectively. Interestingly, the gel-sol transition could be reversibly tuned by chemical redox reaction, and trifluoro-acetic acid stimulation could also induce gel-sol transition, but it was irreversible by addition of triethylamine even heated or sonication. Therefore, the multi-responsive properties endowed the gel to be a favourable candidate for potential functional materials. |
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| Keywords:organogelator; charge-transfer; chemical redox; gel-sol transition |
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