Introduction of continuous excited-state intermolecular proton transfer process into open yttrium-terephthalate framework for ratiometric fluorescent fluorion detection

Confinement of Luminescent Guests in Metal–Organic Frameworks: Understanding Pathways from Synthesis and Multimodal Characterization to Potential Applications of LG@MOF Systems

“…Surprisingly, the ESPT mechanism has not yet been extensively exploited in the MOF systems, and just a handful of examples hitherto have been reported. − Most of them, are based on MOFs where the linker can undergo an ESPT, such as 2,5-dihydroxy­terephthalic acid (DHT). For instance, a number of different metal-based MOFs (Mg, Cd, Y) have been reported whose photophysical properties are governed by an ESIPT reaction within the DHT linker. − ,, As the efficiency of the ESIPT process, and therefore the enol-keto tautomerism, will be directly influenced by the surrounding environment, these MOF materials exhibit excellent capabilities toward the detection of many chemical compounds such as different organic solvents, − water, cations, , anions, , and vapors of different amines . Similarly, another microporous Zn-MOF where the linker, 5-(2-(5-fluoro-2-hydroxy­phenyl)-4,5-bis­(4-fluoro­phenyl)-1H-imidazol-1-yl)­isophthalic acid, experiences an ESIPT reaction, was demonstrated to be an outstanding candidate for the rapid detection of water owing to the enol-keto photo­tautomerism .…”

“…For instance, a number of different metal-based MOFs (Mg, Cd, Y) have been reported whose photophysical properties are governed by an ESIPT reaction within the DHT linker. [203][204][205]207,209 As the efficiency of the ESIPT process, and therefore the enol-keto tautomerism, will be directly influenced by the surrounding environment, these MOF materials exhibit excellent capabilities toward the detection of many chemical compounds such as different organic solvents, 202−205 water, 207 cations, 203,207 anions, 204,207 and vapors of different amines. 209 Similarly, another microporous Zn-MOF where the linker, 5- (2-(5-fluoro-2-hydroxyphenyl)-4,5-bis(4-fluorophenyl)-1Himidazol-1-yl)isophthalic acid, experiences an ESIPT reaction, was demonstrated to be an outstanding candidate for the rapid detection of water owing to the enol-keto phototautomerism.…”

A 12-Connected [Y4((μ3-OH)4]8+ Cluster-Based Luminescent Metal-Organic Framework for Selective Turn-on Detection of F− in H2O

“…Because lanthanide ions can be considered as hard acids according to Pearson’s theory [ 37 ], the choice of the ligand is of first importance as far as polynuclear hydroxidolanthanide based cluster metal-organic frameworks is concerned. Most of them are built with the classical benzoic multicarboxylate ligands, such as terephthalate [ 16 , 38 , 39 ], 2-hydroxyterephthalic [ 18 ], 2,5-dihydroxyterephthalic, 1,2,3- or 1,3,5-benzenetricarboxylic, 1,2,4,5-benzenetetracarboxylic and 4,4′-biphenyldicarboxylate acid, which are versatile building blocks to obtain various high dimensional lanthanide frameworks due to their variety of bridging abilities [ 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 ].…”

Sensitive luminescent chemosensing of fluoride based on Eu-doped Zn-LMOF in aqueous media: structural and spectroscopic studies

“…[46][47][48][49][50] However, many receptors are restricted to nonaqueous media, which seriously limits their applications. 48,51 On the other hand, quantitative F − sensing in aqueous conditions can be achieved by LMOFs of Ln(III), [52][53][54][55] Al(III), 56 Y(III), 57,58 transition-metals, [59][60][61] and Eu(III)-coumarin complexes. 44 Frequently, these LMOFs include anion-receptive motifs such as hydrogen bond donors from amines, 54 phenol rings, 57 or boronic acids; 55 thus, they are not particularly selective, and interference from other basic anions can be a problem.…”