Application of 619-58-9In 2021 ,《Merging Supramolecular and Covalent Helical Polymers: Four Helices Within a Single Scaffold》 was published in Journal of the American Chemical Society. The article was written by Fernandez, Zulema; Fernandez, Berta; Quinoa, Emilio; Freire, Felix. The article contains the following contents:
Supramol. and covalent polymers share multiple structural effects such as chiral amplification, helical inversion, Sergeants and Soldiers or Majority Rules, among others. These features are related to the axial helical structure found in both types of materials, which are responsible for their properties. Herein a novel material combining information and characteristics from both fields, supramol. -oligo(p-phenyleneethynylene) (OPE)- and covalent -poly(acetylene) (PA)- helical polymers, is presented. To achieve this goal, the poly(acetylene) must adopt a dihedral angle between conjugated double bonds (ω1) higher than 165°. In such cases, the tilting degree (Θ) between the OPE units used as pendant groups is close to 11°, like that observed in supramol. helical arrays of these mols. Polymerization of oligo[(p-phenyleneethynylene)n]phenylacetylene monomers (n= 1, 2) bearing (L)-decyl alaninate as pendant group yielded the desired scaffolds. These polymers adopt a stretched and almost planar polyene helix, where the OPE units are arranged describing a helical structure. As a result, a novel multihelix material was prepared, the ECD spectra of which is dominated by the OPE axial array.4-Iodobenzoic acid(cas: 619-58-9Application of 619-58-9) was used in this study.
4-Iodobenzoic acid(cas: 619-58-9) belongs to organic iodides.Application of 619-58-9 The carbon-iodine bond is weaker than other carbon-halogen bonds due to the poor electronegative nature of the iodine atom. In general, organic iodides are light-sensitive and turn yellow during storage, owing to the formation of iodine.
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com