Terbium(III) Organic Gels: Novel Antenna Effect-Induced Enhanced Electrochemiluminescence Emitters

Abstract

Metal organic gels (MOGs) have emerged as a new class of smart soft materials with superb luminescence properties and have attracted tremendous attention in various aspects. However, the electrochemiluminescence (ECL) behavior of MOGs has not been reported yet. In this work, cathode electrochemiluminescence (ECL) emission of terbium(III) organic gels (TOGs) was reported for the first time with potassium persulfate (KSO) as an efficient coreactant. TOGs were synthesized by a facile one-step strategy, mixing terbium ions (Tb) and the ligand 4'-(4-carboxyphenyl)-2,2':6',2''-terpyridine (Hcptpy) at room temperature. The possible strong green ECL emission mechanism was discussed in detail and ascribed to the external coreactant enhancement and internal antenna effect enhancement. Moreover, the promising application of TOGs in analytical chemistry was clarified by the ECL on-off detection of tetracycline. This remarkable discovery of ECL emission of TOGs may pioneer the application of MOGs in ECL fields.

A Host–Guest Interaction-Based and Metal–Organic Gel-Based Biosensor with Aggregation-Induced Electrochemiluminescence Enhancement for Methyltransferase Assay

“…48 In addition, Li's group synthesized terbium metal−organic gels (TOGs) and employed the cathode ECL emission of TOGs for the detection of tetracycline, with TOGs being used as the luminophor. 49 However, the development of MOG-based ECL biosensors for sensitive detection of enzyme activity has remained unexplored. Herein, we develop for the first time a host−guest interaction-based and MOG-based biosensor with aggregation-induced ECL enhancement for sensitive detection of M.SssI methyltransferase (M.SssI MTase).…”

“…Metal–organic gels (MOGs) have emerged as a new type of metal–organic hybrid material, and they can be rapidly built up by straightforward self-assembling from metal ions and organic ligands through metal–ligand interactions and intermolecular forces. − In particular, MOGs can be obtained by a facile and mild strategy (e.g., neutral condition, relatively low reaction temperature, routine solvents, and short reaction time). Due to the well-defined metal–ligand catalytically active sites, high thermal stability, large surface areas, and unique porous structures, MOGs have been widely applied in the fields of adsorption, catalysis, , drug delivery, sensing, − white-light-emitting diodes, and environmental pollution abatement. , Recently, Li’s group employed the silver-based MOG as the solid coreactants to enhance the ECL of Ru­(bpy) 3 2+ for DNA assay, with the MOG being used for the loading of Ru­(bpy) 3 2+ molecules . In addition, Li’s group synthesized terbium metal–organic gels (TOGs) and employed the cathode ECL emission of TOGs for the detection of tetracycline, with TOGs being used as the luminophor .…”

Immunoassay of β 2 -microglobulin at oxide-coated heavily doped p-silicon electrodes

“…This phenomena is not only confined to the electrode, certain solid luminophores e.g. nanoparticles and organic gels can be analogously excited in the electrolyte [138,139]. The presence of background emission limits the appeal of xanthene dyes in HECL applications as their fluorescence lifetime is of a similar magnitude as the electrochemiluminescence background, i.e.…”

Metal‐Organic Gel‐Derived Co/CoO/Co3O4 Composite for the Electrochemical Detection of Diethylstilbestrol

“…Metal‐organic gel (MOG) is also called the coordination polymer gel, which is assembled by gelator to form gel network structure, and the metal‐ligand coordination bond, hydrogen bond, π‐π stacking, and van der Waals force are the mainly interaction manners . MOG materials have been broadly applied in the drug carrier, sensor, catalysis and luminescence field owning to the properties of good compatibility, stimuli‐responses, high surface areas, inherently present open metal sites and large channels . Moreover, the abundant exposed metal sites of MOG could as potential active center and easy accessibility to detect target, and it is possible to directly employ MOG as electrode material for the electrochemical analysis and detection .…”