Dynamic polymeric materials based on reversible B–O bonds with dative boron–nitrogen coordination

Abstract

To minimize the environmental pollution caused by polymeric waste, materials based dynamic chemistry have attracted extensive attention around the world.Various dynamic covalent bonds or noncovalent interactions have been employed to design multifunctional polymers with recyclability, reprocessablility, and sustainability. Among them, polymers based on reversible boron-oxygen (B-O) bonds have been widely investigated because of their unique properties. Particularly, lots of scientists have demonstrated that the combination with boron-nitrogen (B-N) coordination can effectively accelerate the dynamicity as well as enhance the stability of B-O bonds. Therefore, numerous polymers containing dynamic B-O bonds with dative B-N coordination have been designed and synthesized in recent years. These polymers exhibit excellent versatility and great potential for diverse applications such as biosensors, battery electrolytes, and artificial skins. This review provides an overview of the comprehensive influence of dynamic B-N coordination chemistry on B-O bonds in organoboron species and highlights the developments in the area of constructing boron-containing polymeric materials with this interesting linkage. The design guidelines, existing challenges, and future perspectives in this burgeoning field are discussed and proposed.

Boron‐Nitrogen Lewis Pairs in the Assembly of Supramolecular Macrocycles, Molecular Cages, Polymers, and 3D Materials

“…The dynamic nature of B−N LPs has in recent years been further explored for the assembly of stimuli responsive supramolecular polymer networks [18b] . Previous studies demonstrated that the attachment of multiple borane LAs to a polymer could afford interesting properties that enable use as luminescent materials, sensor systems for anions, toxic amines, and other nucleophiles, and as supported catalysts [69] .…”

Crystalline Porous Organic Frameworks Based on Multiple Dynamic Linkages

“…N coordination can effectively protect sensitive boron centers from nucleophilic agents, providing BNOFs with satisfactory stability. [9] Nonetheless, the development of BNOFs is significantly hampered by the difficulty in creating permanent porosity, attributed to the lack of additional interactions to stabilize their skeletons. [8] It is hypothesized that, the integration of BÀ O/B !…”

Crystalline Porous Organic Frameworks Based on Multiple Dynamic Linkages

“…In this context, the CPOFs can be dissolved due to the facile disruption of weak hydrogen bonds (typically, <40 kJ mol −1 ), while their original crystal structures will be maintained after recrystallization on account of partially preserved superstructures in solution through relatively stronger covalent B−O (560 kJ mol −1 ) and dative B←N bonds (100 kJ mol −1 ) [4,8e] . More importantly, the molecular complexes connected by B−O/B←N bonds demonstrate a well‐defined tetrahedral topology with appropriate extending directions, facilitating their further assembly [9a,c] . However, although this approach holds the potential to expand the range of reticular chemistry and simplify the fabrication of CPMs with permanent porosity and excellent solution processability, related results have not yet been reported so far.…”