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Table 1 Cycloaddition of CO₂ and PO catalyzed by various catalysts

From: Triphenylphosphine-based functional porous polymer as an efficient heterogeneous catalyst for the synthesis of cyclic carbonates from CO₂

Entry	Catalyst	Solubility	Yield^a (%)	Sel^b (%)
1	No catalyst	Homogeneous	–	–
2	TPDB	Heterogeneous	44	59
3	TPDB-BP	Heterogeneous	51	93
4	TPDB-BP-TEA	Heterogeneous	97	100

Reaction conditions: PO (20 mmol), CO₂ (1.0 MPa), catalyst (0.10 g), 120 °C, 4 h
^aThe yield of cyclic carbonate product
^bThe selectivity for the cyclic carbonate product, the byproduct is mostly 1,2-propanediol

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