Synthesis of 9,9′-spirobifluorene-based conjugated microporous polymers by FeCl₃-mediated polymerization

Abstract

An easy, safe and low-cost synthesis of 9,9'-spirobifluorene-based conjugated microporous polymers and related carbonized microporous materials with high gas uptake ability was developed.

Photocatalytic H2 Evolution by Pt-Loaded 9,9′-Spirobifluorene-Based Conjugated Microporous Polymers under Visible-Light Irradiation

“…COP-3 was prepared according to our previous report. 15 Pt loading on the surface of COP-3 was carried out using an in situ photodeposition method. 10 Pt loading and the subsequent photocatalysis test were carried out using a Pyrex reaction vessel connected to a closed gas circulation and evacuation system.…”

“…The isotherm shapes correspond to type I characteristics for microporous materials. The large hysteresis in COP-3, which is an indication of softness, 15 disappears after the reaction. Compared with those of COP-3, the specific surface area and pore volume of Pt/COP-3 were slightly smaller; however, Pt/COP-3 retained a relatively high surface area after the reaction.…”

“…15 COP-3, which was prepared from an unsubsti- tuted spirobifluorene using inexpensive FeCl 3 as a mediator through competitive oxidative/FriedelCrafts polymerization at 80°C, had a high surface area (9401980 m 2 g ¹1 ) and high uptake of gases such as carbon dioxide and methane. Furthermore, COP-3 showed strong visible-light absorption with an edge at 550 nm, which was shifted significantly compared to that of the spirobifluorene monomer at 320 nm, indicating the formation of an extended π-conjugated structure.…”

“…Absorption peaks were observed at 320 and 410 nm; these represent COP-3 absorption. 15 The absorption edge of Pt/COP-3 (ca. 470 nm) was shifted to a shorter wavelength compared to that of COP-3 without Pt (ca.…”

Hypercrosslinked silole‐containing microporous organic polymers with N‐functionalized pore surfaces for gas storage and separation

“…The Friedel-Crafts alkylation catalyzed by inexpensive FeCl 3 or AlCl 3 provides a cost-effective route for the synthesis of porous materials in bulk scale. 12,[18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] This contributes to the broad research and practical applications of MOPs. siloles have become valuable aromatic heterocycles to construct various functional polymers.…”