A unique delaminated MoS₄/OS-LEuH composite exhibiting turn-on luminescence sensing for detection of water in formamide

Abstract

We demonstrate a novel example of a delaminated MoS/OS-LEuH composite (LEuH is layered europium hydroxide, OS is 1-octane sulfonate), which exhibits quenched luminescence in formamide and highly enhanced red emission in the water-present case. The turn-on luminescence sensing capability of the material is promising for feasible detection of a trace amount of water in formamide (FM) and N,N-dimethylformamide (DMF).

Luminescence Tuning of Layered Rare-Earth Hydroxides (LRHs, R = Tb, Y) Composites with 3-Hydroxy-2-naphthoic Acid and Application to the Fluorescent Detection of Al3+

“…5−10 There are numerous reports referring to organic− and inorganic−LRH hybrids; 5−14 most of them have focused on the luminescence of the individual components such as layered Eu 3+ and Tb 3+ . [5][6][7]12 Less attention has been given to the luminescence resulting from the interlayer guests or synergetic interactions of the guests with the layered host. 9,10,15 The facile delamination method involving the anion surfactant of 1-octanesulfonic acid sodium (abbreviated OS) that we previously reported 10 luminescence properties [8][9][10]13,15 and expanded the applications:, for example, luminescence sensing.…”

“…9,10,15 The facile delamination method involving the anion surfactant of 1-octanesulfonic acid sodium (abbreviated OS) that we previously reported 10 luminescence properties [8][9][10]13,15 and expanded the applications:, for example, luminescence sensing. 12,16 Currently, metal ion pollution has caused a serious threat to human health and living organisms. Developing effective recognition systems for detecting these ions is necessary and indispensable.…”

“…Our group demonstrated a MoS 4 /OS-LEuH composite, whose turn-on luminescence sensing realized feasible detection of traces of water in formamide. 12 All of these studies relied on the luminescence change of the RE 3+ layer of LRHs, and the recognition seldom involves the metal cations. We reported one example utilizing interlayer fluorescein anions of LRH to discern Fe 3+ , for which the detection was achieved through fluorescence quenching.…”

Ratiometric and Turn-On Luminescence Detection of Water in Organic Solvents Using a Responsive Europium-Organic Framework

“…In order to circumvent these limitations, much effort has been devoted to developing luminescent sensors for water detection. , Luminescent water sensors featuring simple operation, fast response, high sensitivity, ease of fabrication, and capability for noninvasive and in situ detection have been considered as attractive potential alternatives to traditional analysis methods. ,, Luminescent water sensors have been primarily explored based on organic fluorescence molecules. − However, the organic molecular water probes usually can hardly be recovered and reused, , and are not suitable for long-term water content monitoring owing to their poor stability upon strong and continuous ultraviolet light irradiation. In addition to organic fluorophores, a number of other fluorescence materials have also been exploited as water sensors, such as polymers, metal complexes, , Cu nanoclusters, − carbon dots, , lanthanide hybrids, − and upconversion nanoparticles. , …”

Recent progress in layered rare-earth hydroxide (LRH) and its application in luminescence

“…Gd 3+ doping led to greatly enhanced emission owing to the sensitizing effects of Gd 3+ , while multi-color emissions ranging from red, orange, yellow, and then to green can be achieved by co-doping of Eu 3+ and Tb 3+ and via the efficient Tb 3+ →Eu 3+ energy transfer. Besides, inserting rare-earth ions and/or organic sensitizers into the interlayer gallery of LRHs may allow the appearance of strong "synergistic effect" [30][31][32][33][34][35], with which hybrid phosphors can be successfully fabricated to achieve enhanced and color tunable emissions [30][31][32]. White-light emitting hybrid phosphors and nano-composite films have also been successfully designed and fabricated, utilizing the energy transfer from Tb 3+ to Eu 3+ and from an organic sensitizer (such as PMMA) to the activator [31,32].…”