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Lewis acid metal ion-exchanged MAPO-5 molecular sieves for solvent free synthesis of coumarin derivative

Paper ID Volume ID Publish Year Pages File Format Full-Text
51682 46850 2008 6 PDF Available
Title
Lewis acid metal ion-exchanged MAPO-5 molecular sieves for solvent free synthesis of coumarin derivative
Abstract

Magnesium aluminophosphate (MAPO-5) molecular sieve was synthesised hydrothermally and ion-exchanged with Lewis acid metal ions such as Ga3+, In3+, La3+ and Ce3+ by wet method. The materials were characterised using XRD, FT-IR, SEM, TPD (ammonia) and TGA. The XRD patterns of ion-exchanged molecular sieves are similar to the parent MAPO-5 thus showed absence of structural degradation and non-framework metal oxide phase during ion-exchange. The thermograms of metal ion-exchanged MAPO-5 showed a weight loss between 550 and 600 °C which is assigned to the decomposition of M(OH)2+ into MO+ species. The total acidity of materials decreased after ion-exchange as revealed from TPD (ammonia) studies. Their catalytic activity was tested in the solvent free synthesis of coumarin.

Keywords
Magnesium aluminophosphate; Ion-exchange; TPD (ammonia); Coumarin
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Lewis acid metal ion-exchanged MAPO-5 molecular sieves for solvent free synthesis of coumarin derivative
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 10, Issue 1, 10 October 2008, Pages 23–28
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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