Construction of a series of Ln-MOF luminescent sensors based on a functional “V” shaped ligand

Abstract

It is necessary for decreasing application cost of luminescent Ln-MOFs sensors to develop multiple functionalities. The ingenious design of ligands and the rational dope of Ln3+ ions are main...

Construction of Multifunctional Luminescent Lanthanide MOFs for Luminescent Sensing of Temperature, Trifluoroacetic Acid Vapor and Explosives

“…The Eu−O bond has a bond length in the range of 2.309−2.534 Å, which is consistent with the europium−oxygen complexes reported in the literature. 48 The Eu−O polyhedron extends in three directions through organic ligands to form a porous 3D structure. From direction a (Figure 2), two one-dimensional diamond-shaped pores with different pore diameters are formed, and the two pores are 15*8 and 10*4 Å 2 , respectively, as roughly measured using mercury software.…”

“…Based on the ligand design strategies above, we have designed and synthesized a Y-type ligand containing amide hydrogen bond sites on the basis of a V-type ligand, 48 4,4′-(((4-carboxy-1,2-phenylene) bis(azanediyl))-bis(carbonyl))dibenzoic acid. Compared to V-type ligands, Y-type ligands are more likely to form 3D structures by self-assembly.…”

Lanthanide Metal–Organic Framework Isomers with Novel Water-Boosting Lanthanide Luminescence Behaviors

“…Meanwhile, the energy gap [Δ E (S 1 –T 1 )] was 5717 cm –1 , revealing the effective ISC process. It was known that hydrogen bonds could decrease the molecular thermal vibration . Thus, on the one hand, the existence of hydrogen bonds stabilized the T 1 state and facilitated the ISC process. , On the other hand, it also inhibited the normal vibrational frequencies of O–H oscillators .…”

Highly stable lanthanide(iii) metal–organic frameworks as ratiometric fluorescence sensors for vitamin B6

“…This can be attributed to the energy transfer from Tb 3+ to Eu 3+ . 41,42 The emission points of the Eu x Tb 1− x -MOFs with different ratios of Eu( iii ) and Tb( iii ) in the CIE chromaticity diagram are summarized in Fig. 7b and their CIE values are shown in Table S3 †.…”