Porous organic polymers (POPs) are organic macromolecules that are considered emerging materials because of their high specific surface areas, tunable porosities, low densities, high chemical and thermal stabilities, variable compositions,...

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A novel and smart four component system composed of chitosan, polyaniline, magnetite and silver was exploited for catalysis.

Conjugated microporous polymers (CMPs) are promising light harvesters for photocatalytic H 2 evolution because they are simple to prepare with various band gaps. To achieve CMPs displaying high photocatalytic performance, appropriate building blocks must be chosen. We prepared four kinds of triphenylpyridine-based CMPs (TPP-CMPs) through reactions with multibrominated monomers having different geometries [1,3,6,, tris(4-bromophenyl)amine (TPA-3Br), 2,4,6-tris(4-bromrophenyl)pyridine (TPP-3Br), and 1,2,4,5-tetrabromobenzene (BZ-4Br), forming the TPP-pyrene (Py), TPP-triphenylamine (TPA), TPP-TPP, and TPP-benzene (BZ) CMPs, respectively]. This strategy allowed effective synthetic regulation of electron enrichment, porosities, and optoelectronic properties of the TPP-CMPs. The surface areas of the TPP-CMPs were high, up to 1370 m 2 g −1 , and had a high thermal stability. TPP-Py CMP displayed the highest photocatalytic performance with a H 2 production rate of 18 100 μmol g −1 h −1 under irradiation with visible light. Moreover, we achieved apparent quantum yields as high as 22.97% at 420 nm, comparable with those of most other CMPs reported previously.

We report herein the synthesis of two carbazole-thiophene-based conjugated microporous polymers (Cz-3Th and Cz-4Th CMPs) with various degrees of planarity for photocatalytic hydrogen evolution from water. Interestingly, depending upon the...