Investigation on Naphthalene and Its Derivatives‐Based Microporous Organic Hyper‐Cross‐Linked Polymers via Different Methodologies

Abstract

A series of cost‐effective hyper‐cross‐linked polymers (HCLPs) are synthesized from naphthalene via the external cross‐linker (ECL) knitting method, the solvent knitting method, and the Scholl coupling reaction, respectively. According to multiple characterizations, the resulting polymers are thermally stable and fluorescent with large specific surface areas (SSAs) and narrow pore distributions. In particular the HCLP synthesized using dimethoxymethane as the ECL exhibits SSAs up to 2870 m2 g−1 and shows a great potential in gas adsorption applications. Naphthol and 1‐methylnaphthalene are used as monomers to synthesize HCLPs by the above three methods to investigate whether introducing functional groups to naphthalene would improve properties of the resulting polymers. Moreover, HCLPs feature high SSAs, outstanding thermal and fluorescent performances, and facile synthesis, making them promising candidates for industrial applications.

Investigation on Regulating Porous Polymers with Suitable Porosities and/or N-Doping for Enhanced CO2 Capture

“…HCLP 4 exhibited an amorphous structure as displayed by unordered small flake particle accumulation (Figure b), far different from accumulated spherical HCLPs 1–3. The substituted or heteroatom-doped raw materials (quinoline) failed to grow into characteristic spherical particles, which was due to the strong polarity-initiated complete destruction during the hyper-cross-linking process . Several weight loss stages of HCLP 4 were observed (Figure c) and the main weight loss occurred at 450–580 °C.…”

“…The substituted or heteroatom-doped raw materials (quinoline) failed to grow into characteristic spherical particles, which was due to the strong polarity-initiated complete destruction during the hyper-cross-linking process. 25 Several weight loss stages of HCLP 4 were observed (Figure 6c) and the main weight loss occurred at 450−580 °C. Total weight losses of less than 30% even at 900 °C indicated that HCLP 4 featured greater thermal stability than HCLPs 1−3.…”

Non-negligible Influence of Oxygen in Hard Carbon as an Anode Material for Potassium-Ion Batteries

“…Moreover, the carbon yield of HCLPs can reach 60% even at 1000 °C, implying that HCLPs are suitable and promising precursors for carbon materials. 24 The microscopic morphology and structure of the HCs were observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). As shown in Figure 2a−c, the HCs are large irregular particles formed by crosslinking and stacking of small particles of around 100 nm (Figure S2a−c).…”

“…In addition, the oxygen-to-carbon atomic ratio decreases as the pyrolysis temperature increases, indicating that the temperature is a critical factor in determining the oxygen content (Table ). Moreover, the carbon yield of HCLPs can reach 60% even at 1000 °C, implying that HCLPs are suitable and promising precursors for carbon materials …”

Furan- and Thiophene-Modified Hyper-Crosslinked Polymers and Their Adsorption of Phenol from Aqueous Solution

“…Hyper-crosslinked polymers (HCPs) are a kind of typical porous material initially reported by Davankov and co-workers in 1970s, and they have attracted increasing interest in recent years. , More recently, HCPs have achieved rapid development because of their diverse synthesis strategies, easy functionalization, high Brunauer–Emmett–Teller (BET) surface area ( S BET ), adjustable porosity, and diversified surface chemistry, , and they have been diffusely used in fields such as volatile organic compound adsorption, − gas capture and separation, − catalysis, ,, energy storage, and drug release …”