Iron-porphyrin encapsulated in poly(methacrylic acid) and mesoporous Al-MCM-41 as catalysts in the oxidation of benzene to phenol
Poly(methacrylic acid) (PMAA) and mesoporous molecular sieve Al-MCM-41 with Si/Al = 20 were used as supports for the encapsulation of bulky iron(III)-5,10,15,20-tetra-(4-pyridyl)porphyrin (Fe-TPyP). Metalloporphyrin of Fe(III) was encapsulated inside the mesopores of Al-MCM-41 by a process of sequen...
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Elsevier
2006
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| Online Access: | http://eprints.utm.my/7311/ |
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| author | Nur, Hadi Hamid, Helda Endud, Salasiah Hamdan, Halimaton Ramli, Zainab |
| author_facet | Nur, Hadi Hamid, Helda Endud, Salasiah Hamdan, Halimaton Ramli, Zainab |
| author_sort | Nur, Hadi |
| building | UTeM Institutional Repository |
| collection | Online Access |
| description | Poly(methacrylic acid) (PMAA) and mesoporous molecular sieve Al-MCM-41 with Si/Al = 20 were used as supports for the encapsulation of bulky iron(III)-5,10,15,20-tetra-(4-pyridyl)porphyrin (Fe-TPyP). Metalloporphyrin of Fe(III) was encapsulated inside the mesopores of Al-MCM-41 by a process of sequential synthesis of Fe-TPyP by treatment of FeCl3 with 5,10,15,20-tetra-(4-pyridyl) porphyrin (TPyP), followed by encapsulation of Fe-TPyP. Fe-TPyP complexes were also successfully encapsulated in PMAA by polymerizing a monomer (MAA) with a cross-linker around the Fe-TPyP complexes. The materials obtained were identified using XRD, UV-vis DR, FTIR and luminescence spectroscopies. The oxidation of benzene to phenol using aqueous hydrogen peroxide has been studied using both iron-porphyrin encapsulated in poly(methacrylic acid) and mesoporous Al-MCM-41 as catalysts. The encapsulated iron-porphyrin in PMAA (Fe-TPyP-PMAA) give a higher catalytic activity compared to Fe-TPyP encapsulated in Al-MCM-41 (Fe-TPyP-MCM-41). However, the product selectivity and the regenerability of Fe-TPyP-PMAA are not as good as than those of Fe-TPyP-MCM-41. One considers that the hydrophobic nature of Fe-TPyP-PMAA may account for the high catalytic activity, and the ordered structure of Fe-TPyP-MCM-41 may contribute to a high selectivity. |
| first_indexed | 2025-11-15T20:58:03Z |
| format | Article |
| id | utm-7311 |
| institution | Universiti Teknologi Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T20:58:03Z |
| publishDate | 2006 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | utm-73112017-10-23T01:51:45Z http://eprints.utm.my/7311/ Iron-porphyrin encapsulated in poly(methacrylic acid) and mesoporous Al-MCM-41 as catalysts in the oxidation of benzene to phenol Nur, Hadi Hamid, Helda Endud, Salasiah Hamdan, Halimaton Ramli, Zainab QD Chemistry Poly(methacrylic acid) (PMAA) and mesoporous molecular sieve Al-MCM-41 with Si/Al = 20 were used as supports for the encapsulation of bulky iron(III)-5,10,15,20-tetra-(4-pyridyl)porphyrin (Fe-TPyP). Metalloporphyrin of Fe(III) was encapsulated inside the mesopores of Al-MCM-41 by a process of sequential synthesis of Fe-TPyP by treatment of FeCl3 with 5,10,15,20-tetra-(4-pyridyl) porphyrin (TPyP), followed by encapsulation of Fe-TPyP. Fe-TPyP complexes were also successfully encapsulated in PMAA by polymerizing a monomer (MAA) with a cross-linker around the Fe-TPyP complexes. The materials obtained were identified using XRD, UV-vis DR, FTIR and luminescence spectroscopies. The oxidation of benzene to phenol using aqueous hydrogen peroxide has been studied using both iron-porphyrin encapsulated in poly(methacrylic acid) and mesoporous Al-MCM-41 as catalysts. The encapsulated iron-porphyrin in PMAA (Fe-TPyP-PMAA) give a higher catalytic activity compared to Fe-TPyP encapsulated in Al-MCM-41 (Fe-TPyP-MCM-41). However, the product selectivity and the regenerability of Fe-TPyP-PMAA are not as good as than those of Fe-TPyP-MCM-41. One considers that the hydrophobic nature of Fe-TPyP-PMAA may account for the high catalytic activity, and the ordered structure of Fe-TPyP-MCM-41 may contribute to a high selectivity. Elsevier 2006-04-10 Article PeerReviewed Nur, Hadi and Hamid, Helda and Endud, Salasiah and Hamdan, Halimaton and Ramli, Zainab (2006) Iron-porphyrin encapsulated in poly(methacrylic acid) and mesoporous Al-MCM-41 as catalysts in the oxidation of benzene to phenol. Materials Chemistry And Physics, 96 (2-3). pp. 337-342. ISSN 0254-0584 http://dx.doi.org/10.1016/j.matchemphys.2005.07.023 10.1016/j.matchemphys.2005.07.023 |
| spellingShingle | QD Chemistry Nur, Hadi Hamid, Helda Endud, Salasiah Hamdan, Halimaton Ramli, Zainab Iron-porphyrin encapsulated in poly(methacrylic acid) and mesoporous Al-MCM-41 as catalysts in the oxidation of benzene to phenol |
| title | Iron-porphyrin encapsulated in poly(methacrylic acid) and mesoporous Al-MCM-41 as catalysts in the oxidation of benzene to phenol |
| title_full | Iron-porphyrin encapsulated in poly(methacrylic acid) and mesoporous Al-MCM-41 as catalysts in the oxidation of benzene to phenol |
| title_fullStr | Iron-porphyrin encapsulated in poly(methacrylic acid) and mesoporous Al-MCM-41 as catalysts in the oxidation of benzene to phenol |
| title_full_unstemmed | Iron-porphyrin encapsulated in poly(methacrylic acid) and mesoporous Al-MCM-41 as catalysts in the oxidation of benzene to phenol |
| title_short | Iron-porphyrin encapsulated in poly(methacrylic acid) and mesoporous Al-MCM-41 as catalysts in the oxidation of benzene to phenol |
| title_sort | iron-porphyrin encapsulated in poly(methacrylic acid) and mesoporous al-mcm-41 as catalysts in the oxidation of benzene to phenol |
| topic | QD Chemistry |
| url | http://eprints.utm.my/7311/ http://eprints.utm.my/7311/ http://eprints.utm.my/7311/ |