New element organic frameworks viaSuzuki coupling with high adsorption capacity for hydrophobic molecules

Abstract

We present new highly microporous element organic frameworks synthesized by the Pd catalyzed Suzuki coupling reaction. They show specific surface areas of up to 1380 m 2 g À1 with a strong hydrophobic character. Thus, they are interesting for the adsorption of non-polar substances. By variation of the organic linkers, the modular concept of the materials in analogy to the metal-organic frameworks is demonstrated. The polymeric materials have thermal stability up to 573 K and show no decomposition in aqueous environment, allowing excellent handling and processing. They are accessible by a basic synthetic approach, and by their chemical and thermal stabilities they may provide adequate properties for applications in many fields, especially in adsorptive separation processes and storage of non-polar gases.

Nanoporous frameworks exhibiting multiple stimuli responsiveness

“…Figure 2 shows typical optical and electron micrographs of our nanoporous materials (see Supplementary Figs 32 and 33 for additional images). As evident from the electron micrographs, the structures of both PhotoPAFs and PhotoPAN lack long-range order, in agreement with previous reports 15,24,25 on PAFs obtained by irreversible C-C coupling reactions. Still, the porous nature of these materials can easily be discerned by transmission electron microscopy (TEM): focusing on the edge of the sample revealed the presence of B1 nm nanopores (Fig.…”

Efficient CO 2 capture by triptycene-based microporous organic polymer with functionalized modification

“…4a, the initial sharp increase of uptake at low pressure (p/ p 0 < 0.1) is peculiar of type I isotherms, i.e., a significant microporous character in all TPPs. The hysteresis loops up to a relative pressure above 0.9 suggest the occurrence of macropores and interparticular voids [38,39]. The presence of a minimal hysteresis in the N 2 desorption curve of these polymers suggest a partial mesoporous character.…”

An Efficient Approach to Octabromophenylethyl‐Functionalized Cage Silsesquioxane and Its Use in Constructing Hybrid Porous Materials

“…Moreover, the slight increase in uptake above P/P 0 = 0.9 might partly arise from condensation of nitrogen in the macropores and interparticle voids. [35] Furthermore, the adsorption-desorption isotherm displays distinct hysteresis extending into the low relative pressure region between the adsorption and desorption cycles. This might be attributed to activated adsorption arising either from swelling of the polymer matrix or from restricted access of the nitrogen molecules to the pores as a result of blocking at the narrow openings, which is especially a common phenomenon for nonordered nanoporous materials.…”