Negatively charged 2D black phosphorus for highly efficient covalent functionalization

Abstract

Negatively charged ultrathin 2D BP nanosheets exhibit higher reactivity to diazonium addition than neutral BP nanosheets.

Chemical functionalization of 2D black phosphorus

“…This demonstrates that the electronic properties of BP can be readily tuned by grafting groups onto the surface of BPNSs. 96 In 2020, Li et al also developed diazonium covalent functionalization methods by attaching redox-active triphenylamine (TPA) onto BPNSs, which exhibited good electrochemical activity and ambient stability. They further used TPA-functionalized BPNSs to develop nonvolatile memory devices, which showed good long-term stability.…”

“…F, BP-NH 2 can be decorated with Au nanoparticles to form BP-NH 2 -Au. 96 Reproduced with permission: Copyright 2018, The Royal Society of Chemistry and the Chinese Chemical Society 2018 96 F I G U R E 5 A, A scheme of the reaction mechanism between BP nanosheets and alklyl halide nucleophiles. 99 B, XPS survey spectrum of BP modified by S-bromomethyl ethanethiolate.…”

Covalent functionalization of two-dimensional black phosphorus nanosheets with porphyrins and their photophysical characterization

“…Compared with noncovalent approach, covalent functionalization can provide more stable systems. To this end, different types of reactions such as free radical addition, 30,37 nitrene addition 31 and nucleophilic substitution [38][39][40] have been developed for covalent functionalization of BPNSs. Using the developed functionalization strategies, integration of novel functional molecules onto BPNSs for improved physicochemical properties are highly desirable.…”

2D Elemental Nanomaterials Beyond Graphene

“…Because of the non‐toxicity, NB‐690 functionalized BP can be used in photothermal cancer therapy. Phosphorene treated with n ‐BuLi exhibits high yields with 4‐NBD compared the neutral BP due to enhanced reactivity of negatively charged surface . The BP‐NO 2 group can be reduced to BP‐NH 2 by Na 2 S 2 O 4 as the reducing agent.…”