Temperature Driven Self-Assembly of a Zwitterionic Block Copolymer That Exhibits Triple Thermoresponsivity and pH Sensitivity was written by Jimenez, Zulma A.;Yoshida, Ryo. And the article was included in Macromolecules (Washington, DC, United States) in 2015.Synthetic Route of C14H12S2 This article mentions the following:
We report a zwitterionic block copolymer composed of N-isopropylacrylamide and N,N-dimethyl-N-(3-(methacrylamido)propyl)ammoniopropanesulfonate monomers which self-assembles into different structures depending on the solution temperature As the temperature is increased from 20 to 70 °C, the solubility of the polymer switches direction from insoluble to soluble to insoluble to soluble During this process, the polymer self-assembly changes from polymersomes to micelles. These extraordinary transitions are possible because of the hydrophilic-hydrophobic ratio of the polymer blocks and the presence of a carboxyl end group attached to the end of the poly(N-isopropylacrylamide) chain. Addnl., one of these transitions can be controlled by the pH of the solution thanks to the protonation-deprotonation of the carbonyl and the charge neutralization of the ammonium moieties. The present work opens the possibility of designing polymers with temperature driven self-assembly properties that could be used for biomedical applications. In the experiment, the researchers used many compounds, for example, Benzyl benzodithioate (cas: 27249-90-7Synthetic Route of C14H12S2).
Benzyl benzodithioate (cas: 27249-90-7) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Synthetic Route of C14H12S2
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics