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A photostable vitrified film based on a terbium(III) β-diketonate complex as a sensing element for reusable luminescent thermometers

Abstract

A novel temperature-sensitive luminescent material was fabricated from a powder of a mesogenic terbium(III) β-diketonate complex, [Tb(CPDK3-7)3phen] (CPDK3-7 = 1-(4-(4-propylcyclohexyl)phenyl)decane-1,3-dione, phen = 1,10-phenanthroline) by a melt-processing technique. The material is a 20 µm thick vitrified film sandwiched between two quartz plates. The film effectively absorbs light in the wavelength range of 280-405 nm and exhibits a green narrow-band luminescence of Tb3+ ions due to the efficient ligand-to-metal energy transfer. The average luminescence decay time varies reversibly with temperature from 373 µs at 143 K to 33 µs at 253 K having the mean absolute sensitivity of -3.3 µs∙K-1. The simplicity in design, the high optical transmittance (around 90%) in the visible wavelength region of 450-800 nm, insensitivity to atmospheric oxygen and complete resistance to UV light provide technological and operational advantages of the proposed material. The findings demonstrated that the material is promising as a sensing element of luminescent thermometers suitable for long-term temperature monitoring in the range of 143-253 K.

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Publication details

The article was received on 16 Mar 2018, accepted on 09 Aug 2018 and first published on 11 Aug 2018


Article type: Paper
DOI: 10.1039/C8TC01288A
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    A photostable vitrified film based on a terbium(III) β-diketonate complex as a sensing element for reusable luminescent thermometers

    D. V. Lapaev, V. G. Nikiforov, V. S. Lobkov, A. A. Knyazev and Y. G. Galyametdinov, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC01288A

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