Multistimuli‐responsive White Luminescent Fluids Using Hybrid Lanthanide Metal–Coordinate Complex Probes

White-Light-Emitting Lanthanide Metallogels with Tunable Luminescence and Reversible Stimuli-Responsive Properties

“…22 Additional demonstrations by others of white light emitting supramolecular gels 23 and lanthanide-doped emissive metallogels 8,24 confirm that dynamic Ln-N^N^N interactions can indeed dominate stimuli-responsive material behaviors. 7,22 However, little work has been done to characterize the fundamental stimuli-responsive coupling mechanisms between the reversible nature of light emitting lanthanide metal-coordinate complex mechanics and the resulting stimuli-responsive optical dynamics. We have therefore developed model light-emitting metallogels functionalized with lanthanide metal ion-ligand (M-L) coordination complexes via a terpyridyl end-capped 4-Arm-PEG polymer.…”

“…Building upon our previous work on luminescent small molecule based fluids, 22 we sought to incorporate the Ln(III)-Terpy coordination complexes into polymer networks and we found that incremental addition of Tb(ClO 4 ) 3 to a solution of polymer 1 (both in DMF/CH 3 CN, 1:1 v/v) up to a ratio of Terpy:Ln = 2:1 under gentle shaking gave rise to a transparent green emissive gel (GLGel, τ = 0.38 ms, Φ = 5.0%, CIE coordinates (0.28, 0.54)) in 2 min (Figure 1 and S1 in Supporting Information). A similar procedure resulted in a red luminescent Eu(III)-coordinated metallogel (RLGel, τ=1.36 ms, Φ = 14.8%, CIE coordinates (0.54, 0.32)) but with a slower gelation rate of approximately 10 min (see Figure S4).…”

A Red‐Emitting Luminescent Material Capable of Detecting Low Water Content in Organic Solvents

“…Interestingly, a white opaque gel is formed when the concentration of ethanol in the mixture is 90–99 wt % (Scheme b and c). A gel could not be obtained in any other organic solvent (e.g., pyridine, toluene, acetone, diethyl ether, methanol, THF, DMF, and DMSO) or water, if the carboxyl group was deprotonated, or the para ‐phenylcarboxyl moiety was substituted by a methylphenyl moiety or a chloro group . A white precipitate formed on heating the gel at 80 °C for 1–2 h, and the powder product was recovered by centrifugal separation and drying in air (Scheme d and e).…”

Stimuli‐Responsive Lanthanide‐Based Smart Luminescent Materials for Optical Encoding and Bio‐applications

“…Chauvin's group reported mixing europium/terbium trisdipicolinate complexes with commercial blue luminescent ink to reproduce accurate full color images that are invisible under white light and appear under 254 nm UV light (Figure d) . Based on simple RGB‐combined strategy, Andersen’ group mixed red, green, and blue light emitting Ln(III) complexes in solution and achieved white light emitting systems by exerting certain stimulus as shown in Figure a . Guillo's group synthesized a series of isostructural lanthanide coordination polymers Ln 2 (dcpa) 3 (H 2 O) 5 ⋅ 3H 2 O (with Ln=Tb−Lu, Y, ).…”

“…Hence, they further incorporated luminescent guest molecules with wider emission wavelengths into the lanthanide MOFs as shown in Figure d . Additionally, the energy transfer between the guest molecules and lanthanide ions could be utilized to construct novel luminescent thermometers with higher sensitivities ,…”