Conjugated microporous polymers (CMPs) are attracting increasing attention due to their potential applications in areas such as gas adsorption
separation
energy storage
chemical sensing
heterogeneous catalysis and photocatalysis. Two sulphur-containing CMPs have been synthesized via Pd-catalyzed Suzuki coupling reaction. The two CMPs show high chemical stability
high thermal stability
high degree of microporosity
decent specific surface areas and appropriate optical band gaps for photocatalytic hydrogen evolution. Photocatalytic water-splitting hydrogen evolution rates of the CMPs were studied and they could both produce hydrogen under visible light irradiation. SCMP-1 exhibits higher hydrogen evolution rate of 194
μ
mol·g
-1
·h
-1
under visible light (
λ
=420nm). This result demonstrates that photocatalytic hydrogen evolution rate could be tuned by changing electronegativity of the functional groups in the CMPs.