It is very appealing to synthesize functional soft materials
from
natural and abundant plant diterpenes because they have conformationally
rigid and chiral properties. Herein, dehydroabietic-based monoamide
(DA-1) and diamide (DA-2) were designed by introducing device interactions,
π–π stacking and hydrogen bonding, with an aromatic
group, CO, and N–H. DA-1 and DA-2 can be gelled in
a mixed solvent and a single solvent, respectively. Several novel
supramolecular organic gels including highly entangled three-dimensional
networks composed of rods or fibers were constructed. Interestingly,
DA-2 forms a helical structure that is right-handed under the cooperative
control of the solvent and the rigid structure of rosin. Gel formation
was primarily driven by hydrogen bonding, π–π stacking,
and van der Waals force. Combined with Gaussian calculation and X-ray
diffraction (XRD), we established pack patterns for each system, revealing
the roles played by rosin and amide groups. Moreover, the carbon tetrachloride
gel of DA-2 can effectively remove Congo red in an aqueous solution,
and the removal rate can reach 98.4%. This research explores an efficient
organic gel for adsorbing Congo red dye with the secretions of pine
trees.
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