Issue 3, 2018

Achieving white light emission and increased magnetic anisotropy by transition metal substitution in functional materials based on dinuclear DyIII(4-pyridone)[MIII(CN)6]3− (M = Co, Rh) molecules

Abstract

A building block approach has led to the construction of two unique bifunctional magneto-luminescent molecular materials, {[DyIII(4-pyridone)4(H2O)2][MIII(CN)6]}·nH2O (M = Co, n = 2, 1; M = Rh, n = 4, 2), incorporating the cyanido-bridged dinuclear {DyIIICoIII} (1) or {DyIIIRhIII} (2) molecules, that crystallize within the supramolecular network in the attractive non-centrosymmetric Cmc21 space group. Both compounds reveal dual physical properties of colour-tunable photoluminescence and slow relaxation of magnetization. While 1 exhibits multi-coloured photoluminescence ranging from yellow to blue, tuned by the excitation wavelength, 2 additionally reveals nearly white light emission under 336 nm excitation at room temperature. 1 and 2 show 4f-metal-centered strong magnetic anisotropy presenting Single-Molecule Magnet (SMM) behaviour with the large anisotropic energy barriers of 187(6) K for 1, and 214(4) K for 2. We have shown and discussed that the replacement of [CoIII(CN)6]3− by the heavier [RhIII(CN)6]3− analogue in {[DyIII(4-pyridone)4(H2O)2][MIII(CN)6]}·2H2O crystalline materials is an efficient route towards white light emissive solid state matrices composed of Single-Molecule Magnets with enhanced magnetic anisotropy. Such extraordinary photoluminescent molecule-based magnets can become good prerequisites for future application in bifunctional optical and magnetic devices.

Graphical abstract: Achieving white light emission and increased magnetic anisotropy by transition metal substitution in functional materials based on dinuclear DyIII(4-pyridone)[MIII(CN)6]3− (M = Co, Rh) molecules

Supplementary files

Article information

Article type
Paper
Submitted
30 8月 2017
Accepted
18 11月 2017
First published
18 11月 2017

J. Mater. Chem. C, 2018,6, 473-481

Achieving white light emission and increased magnetic anisotropy by transition metal substitution in functional materials based on dinuclear DyIII(4-pyridone)[MIII(CN)6]3− (M = Co, Rh) molecules

J. Wang, S. Chorazy, K. Nakabayashi, B. Sieklucka and S. Ohkoshi, J. Mater. Chem. C, 2018, 6, 473 DOI: 10.1039/C7TC03963H

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