In 2019,Chemistry of Materials included an article by Das, Gobinda; Nagaraja, Sharadhi; Sridurai, Vimala; Shinde, Digambar B.; Addicoat, Matthew; Prakasam, Thirumurugan; Gandara, Felipe; Ravaux, Florent; Sharma, Sudhir Kumar; Nair, Geetha G.; Lai, Zhiping; Jagannathan, Ramesh; Olson, Mark A.; Trabolsi, Ali. Application In Synthesis of 2,6-Pyridinedimethanol. The article was titled 《Redox-Triggered Buoyancy and Size Modulation of a Dynamic Covalent Gel》. The information in the text is summarized as follows:
The development of stimuli-responsive materials capable of transducing external stimuli into mech. and phys. changes has always been an intriguing challenge and an inspiration for scientists. Several stimuli-responsive gels have been developed and applied to biomimetic actuators or artificial muscles. Redox-active actuators in which the mech. motion is driven chem. or electrochem. have attracted much interest, and their actuation mechanism is based on the change in electrostatic repulsion and the loss or gain of counterions to balance newly formed charges. Actuation can also be promoted by changing the hydration state of the material, leading to the release/adsorption of water mols. from the network, inducing a direct shrinking/swelling of the material, resp. A cationic crystalline dynamic covalent gel was obtained via the formation of imine bonds between 2,6-diformyl pyridine and triamino guanidinium chloride. The gel exhibits a reversible contraction/expansion behavior in response to base (oxidation, -H+, -e-) and acid (reduction +H+, +e-), resp. The oxidation induces a color change and contraction of the gel with a concomitant increase in its strength. As synthesized, the cationic gel is denser than water and sinks when placed in water. Upon oxidation, the radical cationic gel expels water mols., rendering it less dense than water and the gel is propelled to the surface without any loss of its structural integrity. These results demonstrate that a careful choice of amine and aldehyde linkers can give rise to imine-linked materials capable of tolerating and resisting extreme acidic and basic conditions while performing work. In the experiment, the researchers used many compounds, for example, 2,6-Pyridinedimethanol(cas: 1195-59-1Application In Synthesis of 2,6-Pyridinedimethanol)
2,6-Pyridinedimethanol(cas: 1195-59-1) belongs to pyridine. Pyridines are often used as catalysts or reagents; particular notice has been paid recently to how pyridine coordinates to metal centers enabling a wide range of valuable reactions. Application In Synthesis of 2,6-Pyridinedimethanol
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts