Ultrastable Tb-Organic Framework as a Selective Sensor of Phenylglyoxylic Acid in Urine

Abstract

Industrial pollution and harmful chemicals seriously affect environment and human health. Styrene is a common air toxicant with widespread exposure sources, including smoking, automobile exhaust, and plastic pollutants. Phenylglyoxylic acid (PGA) is a typical biomarker for exposed styrene. Therefore, it is crucial to quickly identify and quantitatively detect PGA. Herein, an ultrastable terbium metal−organic framework (Tb-MOF 1) was developed, and the luminescence film (1/PLA) consisting of polylactic acid (PLA) and 1 was fabricated as a sensor for rapid detection of PGA. The sensor possesses the advantages of efficient detection [limit of detection (LOD) is 1.05 × 10 −4 mg/mL] and rapid response speed (less than 10 s) for PGA in urine. Furthermore, this sensor exhibits high stability, outstanding anti-interference ability, and excellent recyclability. Based on this film technology, a paper-based probe was then developed for portable and convenient detection. The probe could easily distinguish different concentrations of PGA under the naked eye toward practical sensing applications. Meanwhile, photoinduced electron transfer was demonstrated to be responsible for the luminescence sensing. Hence, this study indicates that Tb-MOF is a promising material to detect PGA for evaluating the effect of styrene on the body.

An ultrastable zinc-based organic framework as a recyclable luminescent probe for methylmalonic acid detection

“…77 Therefore, the excited electrons can be transferred from the excited ligand im to MMA analyte, resulting in the luminescence quenching of compound 1 . 78…”

“…77 Therefore, the excited electrons can be transferred from the excited ligand im to MMA analyte, resulting in the luminescence quenching of compound 1. 78 Finally, to get some insight into this luminescence quenching mechanism of 1 for probing MMA, the luminescence lifetime decay behaviour of compound 1 before and after the addition of MMA were explored. Sample 1 was immersed in 1 mg mL À1 MMA to obtain the corresponding sample MMA-1.…”

ZnAl2O4 Nanomaterial as a Naked-Eye Arsenate Sensor: A Combined Experimental and Computational Mechanistic Approach

“…To ensure real-life applicability of arsenate detection in water samples, our synthesized spinel nanomaterial ZAZ has been put to use to coat a paper strip − made up of Whatman-40 filter paper. After coating, the strip appears colorless in ambient light and bright cyan under a UV lamp.…”

Facile fabrication of luminescent Tb@HOF-based films as a highly sensitive platform for detecting nicotine and its metabolite cotinine via fluorescence sensing and a smartphone

“…S7 † shows that Tb@MA-TMA displayed a strong green uorescence of Tb 3+ ions under 310 nm UV light, quite different from MA-TMA, indicating the efficient "antenna effect" had occurred between MA-TMA and Tb 3+ ions. 40,41 In addition, the disappearance of the emission peak at 402 nm (MA-TMA) in Tb@MA-TMA revealed the efficient energy transfer between MA-TMA and Tb 3+ ions through LMCT, and the corresponding energy-transfer process can be described as follows: rst, MA-TMA transfers electrons from the ground state singlet state (S 0 ) to the excited singlet state (S 1 ) via absorbing the ultraviolet energy, with part of the excitation energy returning to the ground state through radiation transition to produce uorescence (S 1 / S 0 ), corresponding to the emission at 406 nm, while the other part is transferred to the excited state of the triplet state (T 1 ) through intersystem crossing (ISC). Then, part of the energy excited by the triplet state returns to the ground state by radiation transition (T 1 / S 0 ), releasing phosphorescence, which corresponds to the emission at 469 nm.…”