Catalytic CO2 fixation using tin porphyrin supported on organic and inorganic materials under mild conditions

• The [SnIV(TNH2PP)(OTf)2] to was anchored onto MIL-101 and polystyrene.
• These heterogeneous catalysts were used for CO2 fixation with epoxides.
• The catalysts were highly efficient, stable and reusable.

In the present work, the catalytic activities of two supported tin(IV) porphyrin catalysts were investigated in the fixation of CO2 with epoxides under mild conditions (50 °C and atmospheric pressure). In this manner, a new heterogeneous catalyst based on covalent interaction of 5,10,15,20-tetrakis(4-aminophenyl)porphyrinatotin(IV) trifluoromethanesulfonate, [SnIV(TNH2PP)(OTf)2], with chloromethylated MIL-101(Cr), CM-MIL-101 was prepared and characterized by UV–vis, FT-IR, X-ray diffraction (XRD), N2 adsorption, field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray (EDX) and inductively coupled plasma (ICP) methods. The results obtained by this catalytic system in the preparation of cyclic carbonates were compared with those obtained in the presence of chloromethylated polystyrene bound tin(IV) porphyrin, [SnIV(TNH2PP)(OTf)2]@CMP. The effect of reaction parameters and reusability of the both catalysts were also investigated.

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