We synthesized a fully benzoxazine (BZ)-linked POP comprising TPA and DHPT units through Sonogashira–Hagihara coupling and ring opening polymerization for CO₂ capture and energy storage.

We have successfully synthesized two types of two-dimensional conjugated microporous polymers (CMPs), Py-BSU and TBN-BSU CMPs, by using the Sonogashira cross-coupling reaction of BSU-Br₂ (2,8-Dibromothianthrene-5,5′,10,10′-Tetraoxide) with Py-T (1,3,6,8-Tetraethynylpyrene) and TBN-T (2,7,10,15-Tetraethynyldibenzo[g,p]chrysene), respectively. We characterized the chemical structure, morphology, physical properties, and potential applications of these materials using various analytical instruments. Both Py-BSU and TBN-BSU CMPs showed high thermal stability with thermal decomposition temperatures (T_d10) up to 371 °C and char yields close to 48 wt%, as determined by thermogravimetric analysis (TGA). TBN-BSU CMPs exhibited a higher specific surface area and porosity of 391 m² g⁻¹ and 0.30 cm³ g⁻¹, respectively, due to their large micropore and mesopore structure. These CMPs with extended π-conjugated frameworks and high surface areas are promising organic electroactive materials that can be used as electrode materials for supercapacitors (SCs) and gas adsorption. Our experimental results demonstrated that the TBN-BSU CMP electrode had better electrochemical characteristics with a longer discharge time course and a specific capacitance of 70 F g⁻¹. Additionally, the electrode exhibited an excellent capacitance retention rate of 99.9% in the 2000-cycle stability test. The CO₂ uptake capacity of TBN-BSU CMP and Py-BSU CMP were 1.60 and 1.45 mmol g⁻¹, respectively, at 298 K and 1 bar. These results indicate that the BSU-based CMPs synthesized in this study have potential applications in electrical testing and CO₂ capture.

We synthesized two hybrid organic–inorganic porous polymers (HPP) through the Heck reaction of 9,10 dibromoanthracene (A-Br₂) or 1,3,6,8-tetrabromopyrene (P-Br₄)/A-Br₂ as co-monomers with octavinylsilsesquioxane (OVS), in order to afford OVS-A HPP and OVS-P-A HPP, respectively. The chemical structures of these two hybrid porous polymers were validated through FTIR and solid-state ¹³C and ²⁹Si NMR spectroscopy. The thermal stability and porosity of these materials were measured by TGA and N₂ adsorption/desorption analyses, demonstrating that OVS-A HPP has higher thermal stability (T_d10: 579 °C) and surface area (433 m² g⁻¹) than OVS-P-A HPP (T_d10: 377 °C and 98 m² g⁻¹) due to its higher cross-linking density. Furthermore, the electrochemical analysis showed that OVS-P-A HPP has a higher specific capacitance (177 F g ⁻¹ at 0.5 A F g⁻¹) when compared to OVS-A HPP (120 F g ⁻¹ at 0.5 A F g⁻¹). The electron-rich phenyl rings and Faradaic reaction between the π-conjugated network and anthracene moiety may be attributed to their excellent electrochemical performance of OVS-P-A HPP.

We prepared Py-DSDA-COP/SWCNTs and this material showed a capacitance of 171 F g ⁻¹ and energy density of 23.7 W h kg ⁻¹ which is superior to those of Py-DSDA-COP/MWCNTs and Py-DSDA-COP/C60 nanocomposites.

In recent years, the quest for efficient and durable electrode materials for supercapacitors has driven the development of novel conjugated microporous polymers (CMPs). This study presents the synthesis and comprehensive characterization of two novel π-conjugated diyne-linked CMPs, TPE-Diyne CMP and TBN-Diyne CMP, designed for electrode materials in supercapacitors. These CMPs were synthesized via a palladium-catalyzed alkyne-alkyne coupling reaction, yielding high-yield CMPs. Spectroscopic analyses, including FTIR and NMR, confirmed the distinct chemical structures of TPE-Diyne and TBN-Diyne CMPs, highlighting the presence of aromatic and alkyne groups essential for their electrochemical properties. Thermogravimetric analysis (TGA) demonstrated their remarkable thermal stability up to 800 °C in N₂. Furthermore, nitrogen adsorption-desorption measurements revealed high specific surface areas of 428 m² g^-1 for TPE-Diyne CMP and 256 m² g^-1 for TBN-Diyne CMP, with well-defined microporosity. Electrochemical performance tests showed that TPE-Diyne CMP achieved capacitance retention of 98% and an energy density of 3.82 Wh Kg^-1 after 2000 charge-discharge cycles, indicating exceptional stability and energy storage capability. Meanwhile, TBN-Diyne CMP exhibited a cyclic stability of 92% and an energy density of 3 Wh Kg^-1 after 2000 cycles. These results underscore the significance of TPE-Diyne and TBN-Diyne CMPs as innovative and highly effective electrode materials for next-generation supercapacitors, offering enhanced performance and stability. The findings contribute valuable insights into developing advanced materials for energy storage applications, addressing the growing demand for high-performance supercapacitors in various technological fields.

In this study, we have used the one-pot polycondensation method to prepare novel 2D conjugated microporous polymers (Th-F-CMP) containing thiophene (Th) and fluorene (Fl) moieties through the Suzuki cross-coupling reaction. The thermogravimetric analysis (TGA) data revealed that Th-F-CMP (T_d10 = 418 °C, char yield: 53 wt%). Based on BET analyses, the Th-F-CMP sample displayed a BET specific surface area of 30 m² g⁻¹, and the pore size was 2.61 nm. Next, to show the effectiveness of our study, we utilized Th-F-CMP as a fluorescence probe for the selective detection of Fe³⁺ ions at neutral pH with a linear range from 2.0 to 25.0 nM (R² = 0.9349). Furthermore, the electrochemical experimental studies showed that the Th-F-CMP framework had a superior specific capacity of 84.7 F g⁻¹ at a current density of 0.5 A g⁻¹ and outstanding capacitance retention (88%) over 2000 cycles.