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Two photoactive lanthanide (Eu3+, Tb3+) hybrid materials of modified β-diketone bridge directly covalently bonded mesoporous host (MCM-41)

Paper ID Volume ID Publish Year Pages File Format Full-Text
27731 44039 2008 9 PDF Available
Title
Two photoactive lanthanide (Eu3+, Tb3+) hybrid materials of modified β-diketone bridge directly covalently bonded mesoporous host (MCM-41)
Abstract

In this context, two β-diketone ligands, dibenzoylmethane (DBM) and acetylacetone (ACAC) were modified with 3-(triethylsilyl)-propyl-isocyanate (TEPIC) through the extraction of hydrogen of ethylene groups. Then Eu3+ and Tb3+ complexes with the two modified ligands (DBM-Si and ACAC-Si) were fabricated to mesoporous host (MCM-41) by template-directed co-condensation of tetraethyl orthosilicate, resulting in two kinds of novel covalently bonded hybrid materials (denoted as DBM-MCM-41 and ACAC-MCM-41). XRD, N2 adsorption/desorption and SEM reveal that the two covalently bonded hybrid materials have high surface area, uniform mesopore structure and good crystallinity. Especially the luminescent properties present that the modified dibenzoylmethane (DBM-Si) could sensitize Eu(III) ions to exhibit red luminescence and the modified acetylacetone (ACAC-Si) could sensitize Tb(III) ions to exhibit green luminescence, respectively. The hybrid materials covalently bonded MCM-41 possess the higher intensities and longer lifetimes than those of pure complexes (Eu-DBM and Tb-ACAC).

Keywords
Photophysical properties; Sol–gel process; Molecular hybrids; Modified β-diketone bridges directly covalently bonded mesoporous host
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Two photoactive lanthanide (Eu3+, Tb3+) hybrid materials of modified β-diketone bridge directly covalently bonded mesoporous host (MCM-41)
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 195, Issues 2–3, 15 April 2008, Pages 314–322
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us