Chameleon Luminophore for Sensing Temperatures: Control of Metal‐to‐Metal and Energy Back Transfer in Lanthanide Coordination Polymers

Abstract

A chameleon luminophore: A temperature‐sensing material is reported that has a high thermostability (see picture). The material is composed of color‐changing luminescent coordination polymers containing EuIII and TbIII ions. The coordination polymer exhibits a high emission quantum yield Φ of 40 % at room temperature and a temperature‐sensing ability over a wide range of 200–500 K.

Critical Role of Energy Transfer Between Terbium Ions for Suppression of Back Energy Transfer in Nonanuclear Terbium Clusters

“…A clear temperature dependence was observed above 270 K for Tb 1 Gd 8 and Tb 2 Gd 7 clusters, while lifetimes remained constant for Tb 5 Gd 4 , Tb 8 Gd 1 , and Tb 9 clusters. The rate constant of BET k BET can be estimated by the following equation3762.…”

Synthesis and luminescence properties of novel white emitting phosphor KMgLa(PO4)2:Dy3+

“…8(b) indicate the activation energy is achieved as 0.019 eV. Compared with some other materials, [22,23] the sample we synthesized has good thermal stability, it may have potential application in white LEDs, life lighting or other temperature change places. In summary, the results also indicate that for high power LED application, KMgLa 1 À x (PO 4 ) 2 :xDy 3 þ should be a promising phosphor.…”

Temperature-dependent luminescence properties of lanthanide(iii) β-diketonate complex-doped LAPONITE®

“…Simultaneously, The calculated emission quantum yield of (Eu-HFA)@LA (23%) (shown in Table S4) is much smaller than that of previous Eu(HFA) 3 complexes in solid state (>50%). [30] This may be owing to effective radiation deactivation of the excited state through weak coupling with the vibrational states of high-frequency OH oscillators of laponite. In spite of this, the excellent optical properties above made it a candidate for ratiometric and colorimetric luminescent thermo sensor.…”

“…[16,25,26] Up to now, the temperature-dependent luminescent properties of such kind of hybrid materials are scarcely reported although those of lanthanide metal-organic frameworks (MOFs) have been frequently discussed. [27][28][29][30][31] But large-scale use of rare earth and higher priced MOFs are unrealistic, which make hybrid material where only a low amount of lanthanide are included to be the best option. Considering that most hybrid material were prepared under harsh conditions, e.g., high cost, complicated reaction process and long time-consuming, developing new hybrid material by using low-cost and stable inorganic matrices through a simple and environmentally friendly procedure is highly demanded.…”