Issue 3, 2015

Organic melt, electride, and CVD induced in situ deposition of luminescent lanthanide imidazolate MOFs on nanostructured alumina

Abstract

The highly luminescent MOFs 3[Ce(Im)3ImH]·ImH, 3[Tb(Im)3], and the dense framework 3[Sr0.95Eu0.05(Im)2] (Im = imidazolate-anion, C3N2H3) were grown on nanostructured macroporous aluminium oxide (AAO) membranes. Thereby, luminescent coatings on the membranes were achieved. Three different growth processes unusual for MOFs were investigated and compared: a film growth process in situ to MOF formation from the linker melt, electride induction with solvated electrons, and chemical vapour deposition (CVD) to additionally utilize the gas phase. Deposition from the organic melt has proved to be a fast approach to achieve various film thicknesses of the luminescent frameworks. The electride-based approach offers excellent homogenization at an atomic level for the highest quantum yields of QY > 90% for 3[Sr0.95Eu0.05(Im)2] including the formation of barite rose analogous crystals prior to growth of a complete film on AAO membranes. For 3[Tb(Im)3] and 3[Ce(Im)3ImH]·ImH, deposition of bundles of crystals by CVD on AAO is possible while also maintaining the luminescence of the original MOFs but without complete layers. In order to elaborate the divalent character of europium, being the basis of the high efficiency of the luminescence, EPR studies were carried out on 3[Sr1−xEux(Im)2], x = 0.01, 0.05 and 1.

Graphical abstract: Organic melt, electride, and CVD induced in situ deposition of luminescent lanthanide imidazolate MOFs on nanostructured alumina

Supplementary files

Article information

Article type
Research Article
Submitted
29 loka 2014
Accepted
22 joulu 2014
First published
22 joulu 2014

Inorg. Chem. Front., 2015,2, 237-245

Organic melt, electride, and CVD induced in situ deposition of luminescent lanthanide imidazolate MOFs on nanostructured alumina

L. V. Meyer, J. Vogt, H. Schäfer, M. Steinhart, R. Böttcher, A. Pöppl, M. Mai, C. Feldmann and K. Müller-Buschbaum, Inorg. Chem. Front., 2015, 2, 237 DOI: 10.1039/C4QI00184B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements