Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China.
Chemistry. 2013 Jul 15;19(29):9506-10. doi: 10.1002/chem.201301446. Epub 2013 Jun 10.
A new kind of Se-N dynamic covalent bond has been found that can form between the Se atom of a phenylselenyl halogen species and the N atom of a pyridine derivative, such as polystyrene-b-poly(4-vinylpyridine). This Se-N dynamic covalent bond can be reversibly and rapidly formed or cleaved under acidic or basic conditions, respectively. Furthermore, the bond can be dynamically cleaved by heating or treatment with stronger electron-donating pyridine derivatives. The multiple responses of Se-N bond to external stimuli has enriched the existing family of dynamic covalent bonds. It can be used for controlled and reversible self-assembly and disassembly, which may find potential applications in a number of areas, including self-healing materials and responsive assemblies.
一种新型的 Se-N 动态共价键已经被发现，它可以在苯硒基卤代物的 Se 原子和吡啶衍生物的 N 原子之间形成，例如聚苯乙烯-b-聚（4-乙烯基吡啶）。这种 Se-N 动态共价键可以在酸性或碱性条件下分别可逆和快速形成或断裂。此外，该键可以通过加热或用更强的供电子吡啶衍生物处理来动态断裂。Se-N 键对外界刺激的多种响应丰富了现有的动态共价键家族。它可以用于控制和可逆的自组装和解组装，这可能在许多领域找到潜在的应用，包括自修复材料和响应性组装。
