Interplay Between Hydrophobicity and Basicity toward the Catalytic Activity of Isoreticular Organocatalyst MOFs

سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 363

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شناسه ملی سند علمی:

IRANCC20_289

تاریخ نمایه سازی: 28 اردیبهشت 1398

چکیده مقاله:

The structural diversity of metal-organic frameworks, MOFs, tailored engineering of these compounds is important for their use in catalytic processes [1]. Among the MOFs tested as heterogeneous catalysts, there have been rare reports of size selective catalysts. In the present work, we could successfully indicate that subtle substrate selectivity can be induced in the catalytic system by designing a series of isoreticular MOFs with slight structural modifications. Four MOF catalysts possess imine and/or amine basic N-donor pillars bearing phenyl or naphtyl cores owing different hydrophobic character around the basic reaction center were prepared via simple mechano-chemical synthesis. They were characterized thoroughly using TG, IR and PXRD analysis. For the first time, aldol-type condensation reaction of malononitrile with ketone-functionalized carbonyl substrates developed in the presence of the basic MOF organocatalysts (Figure 1) [2]. Moreover, it has been successfully showed that a subtle substrate selectivity can be addressed during the reaction of three slightly different α,β-unsaturated carbonyl compounds in contrast the effect of size control barriers that commonly direct heterogeneous reaction pathway.

نویسندگان

Hossein ghasempour

Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, Tehran, Iran

ali morsali

Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, Tehran, Iran