A one building block approach for defect-enhanced conjugated microporous polymers: Defect utilization for recyclable and catalytic biomass conversion

A one building block approach was studied for preparation of defect-enhanced and terminal alkyne-rich hollow conjugated microporous polymers (H-TA-CMPs). The enriched terminal alkynes were utilized in post-synthetic modification of H-TA-CMPs with aliphatic sulfonic acids (H-TA-CMP-ASO₃H). The obtained H-TA-CMP-ASO₃H showed excellent reactivity and recyclability in biomass conversion to 5-hydroxymethylfurfural, compared with CMPs with aromatic sulfonic acids (H-control-SO₃H).