Tetra-armed conjugated microporous polymers for gas adsorption and photocatalytic hydrogen evolution

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2017,（8）
• 页码范围: 1075-1083
• 页数: 9页
• 语种: 英文
• DOI: 10.1007/s11426-017-9077-0

摘要

Two novel tetra-armed conjugated microporous polymers with different geometries have been designed and synthesized via Suzuki-Miyaura cross coupling polycondensation.Both polymers are stable in various organic solvents tested and are thermally stable.The pyrene-containing polymer of PrPy with the rigid pyrene unit shows a higher Brunauer-Emmet-Teller specific surface area of 1219m2g-1 than the tetraphenylethylene-containing polymer of PrTPE (770m2g-1),which leads to a high CO2 uptake ability of 3.89mmolg-1 at 1.13bar/273K and a H2 uptake ability of 1.69wt％ at 1.13bar/77K.The photocatalytic hydrogen production experiments revealed that PrPy also shows a better photocatalytic performance than PrTPE due to the higher conjugation degree and planar structure,the broader UV-visible (UV-Vis) absorption,the lower photoluminescence lifetime,and the higher specific surface area.