Bifunctional color-tuning luminescent Ln@Zr-MOFs for white LEDs and sensitive, ultrafast detection of nitrobenzene in aqueous media

Abstract

Sensitive and rapid detection of nitrobenzene in aqueous media using a fluorescent Eu@Zr-MOF.

A 2-fold interpenetrated zinc–organic framework with Lewis basic triazole sites: luminescence sensing of Fe3+ and Cr2O72−, and warm white-light emission by encapsulated Ln3+ ions

“…S18 †), it is worth attempting to achieve luminescence emission tuning and white-light emission of compound 1 by encapsulating Eu 3+ ion with characteristic red luminescence and Tb 3+ ion with characteristic green emission. 41,42 Judging from the consistency of the PXRD spectra (Fig. S19 †), the basic frameworks of Ln 3+ @compound 1 are still retained (total concentration: 50 mM).…”

“…Meanwhile, the N 1s peak shifts to a high binding energy after encapsulating Ln 3+ ions, indicating the interaction of Ln 3+ and nitrogen atoms. 41 Then, the luminescence spectra of Ln 3+ @compound 1 in the solid state were studied in detail. As shown in Fig.…”

Cage Bismuth Metal–Organic Framework Materials Based on a Flexible Triazine–Polycarboxylic Acid: Subgram Synthesis, Application for Sensing, and White Light Tuning

“…34 This kind of MOF generally has a novel topological structure, various adsorption sites, and adjustable luminescence. 35 For example, Liu et al constructed a heterometallic MOF using H 3 TATAB, and the MOF showed a 3D doubly interpenetrated framework and could be used as a fluorescent sensor for nitenpyram. 36 Our group synthesized a Tb-MOF via 2,4,6tris(3,5-dicarboxylphenylamino)-1,3,5-triazine (H 6 TDPAT), 37 which showed a 3D microporous structure; this Tb-MOF could be used as a multifunctional sensor toward colchicine and so forth.…”

“…Among triazine polycarboxylic ligands, symmetric triazine tricarboxylic ligands, triazine tetracarboxylic ligands, and triazine hexacarboxylic ligands have been studied emphatically because their symmetries are high and easy to form porous networks . This kind of MOF generally has a novel topological structure, various adsorption sites, and adjustable luminescence . For example, Liu et al constructed a heterometallic MOF using H 3 TATAB, and the MOF showed a 3D doubly interpenetrated framework and could be used as a fluorescent sensor for nitenpyram .…”

On the Use of Polymer-Based Composites for the Creation of Optical Sensors: A Review

“…Systems of this kind could also be used for other analytes detection, such as nitrobenzene (NB), which should be controlled in wastewater to protect the human health and natural environment. Partial replacement of terephthalic acid (H 2 BDC) ligands of UiO-66 MOF with m-phthalic acid (m-H 2 BDC) followed by modification with Ln 3+ (Ln 3+ = Eu 3+ , Tb 3+ ) yielded bifunctional Ln@Zr-MOFs [ 151 ]. It was found that Eu 10 @Zr-MOFs are suitable for turn-off fluorescent switch of NB, since the latter can easily quench the red emission from Eu 3+ through a photoinduced electron transfer (PET) process between NB and its ligands.…”