Sabater Paula, Zapata Fabiola, Bastida Adolfo, Caballero Antonio
Departamento de Química Orgánica, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain.
Departamento de Química Física, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain.
Org Biomol Chem. 2020 May 27;18(20):3858-3866. doi: 10.1039/d0ob00258e.
The utilization of anions to induce the formation of self-assembled supramolecular polymers in solution is an undeveloped area of host-guest chemistry. We report in this manuscript a comparative study of two tripodal anion receptors by hydrogen or halogen bonding interactions to form self-assembled supramolecular structures induced by the presence of anions. DOSY NMR and DLS experiments provided evidence for the formation of supramolecular structures in solution in both halogen and hydrogen bond donors with H2PO4- anions. The nucleation and elongation constants obtained using the thermodynamic model indicate that the polymers grow following an isodesmic mechanism. Emission studies demonstrate that only the formation of the supramolecular polymer between the halogen bond donor receptor and H2PO4- anions results in the appearance of the excimer emission band.
利用阴离子在溶液中诱导自组装超分子聚合物的形成是主客体化学中一个尚未开发的领域。我们在本手稿中报告了通过氢键或卤键相互作用对两种三脚架型阴离子受体进行的比较研究，以形成由阴离子存在诱导的自组装超分子结构。DOSY NMR和DLS实验为在卤键和氢键供体与H2PO4-阴离子中溶液中超分子结构的形成提供了证据。使用热力学模型获得的成核和伸长常数表明聚合物按照等键机理生长。发射研究表明，只有卤键供体受体与H2PO4-阴离子之间形成超分子聚合物才会导致准分子发射带的出现。
