TbCo and Tb_0.5Dy_0.5Co layered cyanido-bridged frameworks for construction of colorimetric and ratiometric luminescent thermometers

Abstract

A colorimetric temperature sensor exploring a wide range of emission colours and a ratiometric temperature sensor utilizing sharp emission lines of TbIII and DyIII are achievable with cyanido-bridged TbCo and Tb0.5Dy0.5Co heterometallic assemblies.

Reversible Humidity-Driven Transformation of a Bimetallic {EuCo} Molecular Material: Structural, Sorption, and Photoluminescence Studies

“…The efficiency of this ET process is rather weak as it is overpassed by the Eu III -centered direct excitation pathways. This is due to the relatively long intermetallic Eu–Co distances, the 1:1 Co-to-Eu stoichiometry in the obtained phases and, thus, the attachment of only a single Co III center for each Eu III site in addition to the presumable occurrence of an energy back-transfer effect at room temperature [ 53 , 54 ]. It is difficult to distinguish 1 and 2 using the excitation spectra as the excited states of Ln 3+ ions are barely affected by the coordination geometry, and the presented structural transformation seems to be irrelevant in terms of the observed Co-to-Eu energy transfer.…”

Physical Manipulation of Lanthanide‐Activated Photoluminescence

“…The excellent temperature dependence of upconversion intensity ratio of 2 H 11/2 → 4 I 15/2 to 4 S 3/2 → 4 I 15/2 (Er 3+ ) and 1 G 4 → 3 H 5 to 3 H 4 → 3 H 6 (Tm 3+ ), as shown in Figure 5a,b, respectively, suggested that cubic NaYb(Mn)F 4 :Er/Tm@NaYF 4 upconversion nanoparticles are suitable for temperature sensing with a wide temperature range from 123 to 423 K and high sensitivity of 0.0049 K −1 at 423 K (Er 3+ , Figure 5c) and 0.0024 K −1 at 123 K (Tm 3+ , Figure 5d). In a novel Tb 0.5 Dy 0.5 Co layered cyanido-bridged framework, Kumar et al [113] also realized a Mott-Seitz model temperature dependence for the intensity ratio of 545 nm (Tb 3+ ) to 576 nm (Dy 3+ ) and achieved a relative thermal sensitivity of www.advancedsciencenews.com www.ann-phys.org Figure 6. [111] Louika et al [112] reported a mixed Eu-Tb metal organic framework, [Tb 0.9 Eu 0.1 (1,3-bdc) 3 (H 2 O) 2 ]·H 2 O, as a luminescent thermometer, in which the luminescence intensity ratio of Tb 3+ to Eu 3+ presented the classical Mott-Seitz model temperature dependence in the 12-230 K range.…”

Mixed Tb/Dy coordination ladders based on tetra(carboxymethyl)thiacalix[4]arene: a new avenue towards luminescent molecular nanomagnets

“…[67][68][69][70][71][72] But tuneable emission can also arise when mixed Tb/Dy coordination compounds are used. 73 The ligand uorescence and Dy 3+ and Tb 3+ phosphorescence were thoroughly studied in the solid-state in the corresponding (Dy/Tb) solid solutions. In addition, the magnetic properties of the anisotropic Dy 3+ compound were investigated in detail.…”