Stille type P–C coupling polycondensation towards phosphorus-crosslinked polythiophenes with P-regulated photocatalytic hydrogen evolution

Abstract

Recently, exploring new type polymerization protocols has been a major driving force in advancing organic polymers into highly functional materials. Herein we report a new polycondensation protocol to implant phosphorus...

POPs to COFs by post-modification: CO2 chemisorption and dissolution

“…1 The amorphous character of POPs could be overcome by self-healing throughout various protocols, as in dynamic covalent chemistry and post-modification. Swinging its behaviour into a highly crystalline form leads to the formation of covalent organic frameworks (COFs), 2,3 which can be categorized according to bonding, as in hydrazone, squaraine, phenanzine, benzoxazole, β-ketoenamine, ester and imine-based motifs. 4,5 The latter Schiff base (imine) based COFs 6,7 are known by their structural uniformity, together with ease of synthesis, chemical and thermal stability, electrical conductivity, ability to coordinate with metal ions and tuneable modification compared to triazine, imide and boron correspondents.…”

Synthesis and Photophysical Properties of Carbazole-Functionalized Diazaphosphepines via Sequent P–N Chemistry

“…Organic π-conjugated molecules (OCMs) exhibit rich photophysical, redox, and electrical properties, thus showing promising applications in the areas of organic catalysis, bioimaging/sensing, toxic/dangerous materials sensing, and optoelectronic devices. − Recently, incorporating main-group elements (B, − N, − Si, P, − S, − etc .) into molecular backbones has become an efficient strategy for fine-tuning the photophysical characteristics, redox properties, molecular organizations, and energy/charge carrier transports of OCMs.…”

“…The P element is very distinct among the main-group elements. The rich chemistry, such as oxidation (O/S/Se), borylation, alkylation, and metal coordination, is shown to efficiently tune the chemical structures and electronic structures of P-OCMs for various applications. − ,− The chemical diversity gives phosphorus a unique position in both organic catalysis and materials chemistry. So far, the research on five-, six-, and seven-membered P-OCMs (Chart , I–III) has gained significant progress with respect to synthetic protocols, theoretical studies of chemical and electronic structures, and optoelectronic properties. − ,,− Generally, synthesis of the P-OCMs involved highly reactive nucleophilic organometallic reagents, such as organolithium species, and/or transition metal catalysts. ,,,, The strong nucleophilic character of the organometallic reagents can greatly limit the diversity of chemical structures of the P-OCMs, which affects the exploration of new optoelectronic characteristics.…”

Amorphous porous organic polymers containing main group elements

“…Following the CuI catalyzed formation of P- a POPs, Ren’s group recently extended the classical Stille C–C coupling reaction to the P–C bond formation where three P–C bonds are able to form at a single P-center (Fig. 13a ) 95 . Upon the oxidation of P–C bond, electrophilic character of catalytic Pd(II) center was suppressed by the electron-rich P-center, which is distinct from the classical Still coupling reaction.…”