Preparation of Naphthalenediimide-Decorated Electron-Deficient Photochromic Lanthanide (III)-MOF and Paper Strip as Multifunctional Recognition and Ratiometric Luminescent Turn-On Sensors for Amines and Pesticides

Abstract

Detecting toxic amine and pesticide contamination in the environment is one of the most pressing issues for environmental sustainability. In this work, two 3D Ln-BINDI complexes [Ln = Eu (1), Sm (2); H4BINDI (N, N′-bis(5-isophthalic acid)-1,4,5,8-naphthalenediimide)] have been designed and synthesized. Crystal structure of [Eu2(BINDI) (NO3)2(DMA)4]·2DMA (complex 1) featuring the lvt topology was determined by X-ray single-crystal diffraction. A multi-functional ratiometric luminescence sensor benefitting from π-electron-deficient NDI moieties and f–f transition characteristics of lanthanide Eu3+ ions for complex 1 has been investigated. Markedly, complex 1 exhibit completely different selective fluorescence ratiometric turn-on responses and pretty high sensitivity behaviors to aromatic amines (OPD), aliphatic amines (n-BA), and pesticides (TBZ), respectively, which are driven by interactions between the electron-donating amino group and acceptor NDI site, contributing to complex 1 as a potential ratiometric luminescent turn-on sensor for practical environmental applications. A PVA/1@paper strip can be used as a potential size selectivity sensor for the practical detection of aliphatic amine vapors in the environment through visual chromic fluorescence enhancement. Because NDIs can undergo one-electron reduction to form stable NDI· free radicals, solid complex 1 can visually distinguish different kinds of amines by selective amine-specific color changes and has the photochromic property of erasable inkless printing.

Photochromism and Photomagnetism in Two Ni(II) Complexes Based on a Photoactive 2,4,6-Tris-2-Pyridyl-1,3,5-Triazine Ligand

“…Photochromic smart molecules, as one of the famous multifunctional materials, have been widely used in optical switch, information storage, sensor, and other fields. − They can show color changes under light irradiation with reversible changes in physicochemical properties (such as luminescence, − magnetism, − , and conductivity − ). So far, the metal–organic hybrid photochromic family has increased the possibilities for integrating the merits of inorganic and organic units at the molecular scale, providing a platform for researchers to design and create novel photochromic materials with diverse photoresponsive functionalities. − Especially, electron-transfer (ET) photochromic complexes containing viologen ligands and their derivatives have attracted extensive attention. − However, works on this photochromic system constructed by new photoactive ligands are still challenging due to the difficulty of synthesis and serendipity of photochromism.…”

Zinc(II)-MOF: A Versatile Luminescent Sensor for Selective Molecular Recognition of Flame Retardants and Antibiotics

“…As an innovative category of crystalline porous materials, metal–organic frameworks (MOFs) provide distinctive properties owing to their fascinating topological properties and structural diversities leading to their numerous applications from drug delivery to luminescent sensing. − As a potential fluorescent probe, d 10 metal ion-based MOFs with luminescent properties have found widespread applications as luminescent sensors to detect heavy metal ions, − anions, − toxic organic pollutant molecules, − cancer markers, amino acids, − pesticides, − pharmaceuticals, − flame retardants, and biomolecules owing to their exceptional selectivity, sensitivity, rapid response time, and recyclability. , Nonetheless, the contemporary scientific community faces a challenging task in designing and developing MOF materials capable of serving as multiresponsive luminescent sensors for the simultaneous detection of flame retardants and antibiotics.…”

On–Off Ratiometric Fluorescence Europium(III) Metal–Organic Framework for Quantitative Detection of the Inflammatory Marker Neopterin

“…Recently, a fluorescence sensing method based on lanthanide­(III) metal–organic framework (Ln-MOF) materials has been confirmed to be a promisingly available platform for the detection of hazardous substances due to its superior sensitivity and selectivity, convenient utilization, durable reversibility, and has attracted more and more attention. − Benefiting from the unique photoluminescence behavior of the lanthanide­(III) ions and organic ligands, the effective energy-transfer processes of a fluorescence Ln-MOF material could be adapted to the regulation of the organic ligands for achieving the sensitization process via an “antenna effect”, thus achieving the simultaneous photoluminescence of lanthanide­(III) ions and organic ligands − Moreover, a fluorescence Ln-MOF material can realize the structural modifiable functionality by the encapsulation of some desired fluorescence matrix, thereby providing access to tuning the fluorescence dynamics through the influence of versatile encapsulated fluorescence matrix composites within the Ln-MOF material. − In principle, the regulations of the fluorescence Ln-MOF behaviors could be readily achieved by the optimization of fluorescence centers such as the lanthanide­(III) ions, the organic ligands, and the versatile encapsulated fluorescence matrix composites, − which endow superior applications of a Ln-MOF material for fluorescence sensing behaviors. In general, there have been two fluorescence sensing forms of the Ln-MOF material.…”