fig7

Figure 7. Optimization of other reaction parameters and recycle tests of the Ir/POP-Phen. General reaction conditions: n-BuOH (48 mL, 524 mmol), total pressure (10 MPa) of CO₂ and H₂ (CO₂:H₂ = 4:6), Ir dosage (0.83 μmol), Et₃N (20 mL), reacted at 160 °C for 12 h. Yield, TON, and TOF were determined by GC analysis using m-xylene as the internal standard. (A and B) Screening of the amount of n-BuOH and Et₃N; (C) Screening of the amount of H₂O added; (D and E) Kinetic study and hot-filtration experiments; (F) Recyclability of the Ir/POP-Phen. Ir/POP-Phen: Porous phenanthroline-based polymer-supported single-iridium-atom catalyst; TON: turnover number; TOF: turnover frequency; GC: gas chromatography.