H2O2-assisted detection of melamine using fluorescent probe based on corn cob carbon dots-Ionic Liquid-Silver nanoparticles

Zheng, Yuexin; Hao, Jiawei; Arkin, Kamile; Bei, Yuyang; Ma, Xuesong; Shang, Qianqian; Che, Weilong

doi:10.1016/j.foodchem.2022.134415

Cited by 13 publications

(3 citation statements)

References 37 publications

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“…72 Moreover, these complex fluids are very sensitive The UV−visible absorption spectrum of the IL 1 IL 2 aqueous solution shows a weak broadband centered at around 310 nm (Figure S4), which can be ascribed to the π−π* transitions within the imidazolium units. On the other hand, the UV− visible absorption spectra of dilute aqueous solutions of SFIL 1 IL 2 -3h, SFIL 1 IL 2 -4h, and SFIL 1 IL 2 -5h display strong absorption peaks centered at 276 nm, which are ascribed to the π−π* transition of C�C groups in the sp 2 domain 73,74 (Figure 4). The UV−visible data are consistent with the band detected at 1566 cm −1 in the ATR/FTIR spectra attributed to the C�C vibrational modes of the imidazolium ring (Figures 2a and S1) and with the signal at 284.8 eV in the XPS spectra (Figures 2c and S2a).…”

Section: Chemistry Of Materialsmentioning

confidence: 99%

A Glance at Novel Ionanofluids Incorporating Silk-Derived Carbon Dots

Duarte,

Pereira,

Medronho

et al. 2024

Chem. Mater.

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One of the hallmarks of the current efforts in the field of thermal energy is heat transfer enhancement. Ionanofluids (INFs), a combination of nanomaterials and ionic liquids (ILs), are an appealing category of thermal fluids. In this work, we introduce sustainable INFs composed of carbon dots derived from Bombyx mori silk fibroin (SF) dispersed in a mixture of 1-butyl-3methylimidazolium chloride (IL 1 ) and 1-(4-sulfobutyl)-3-methylimidazolium triflate (IL 2 ). The syntheses were performed at mild conditions, with reaction times of 3, 4, and 5 h, and without purification steps. The INFs display room-temperature emission in the visible spectral range with quantum yield values up to 0.09 and are essentially viscous fluids (G″ > G′). A marked shear thinning behavior is observed at high shear rates, particularly for the systems SFIL 1 IL 2 -3h and SFIL 1 IL 2 -4h. The INFs demonstrate relatively high heat capacity and thermal conductivity values in comparison to state-of-the-art INFs. Under suitable illumination conditions, the INFs can convert light into heat in an efficient manner, with photothermal conversion efficiencies of up to 28%, similar to other reported INFs. SFIL 1 IL 2 -5h exhibits remarkable stability over time within the range of working temperatures. This work paves the way for the development of new thermal fluids for enhanced heat transfer technologies using sustainable synthesis routes and natural raw precursor materials.

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Section: Chemistry Of Materialsmentioning

confidence: 99%

A Glance at Novel Ionanofluids Incorporating Silk-Derived Carbon Dots

Duarte,

Pereira,

Medronho

et al. 2024

Chem. Mater.

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“…[38] Shang et al extended the afterglow lifetime by 1.76 times by synergistic energy resonance transfer and thermal activation using molecules with TADF as electron acceptors and CDs with green phosphorescence as electron donors. [39] Although some previous studies have investigated bimodal afterglow, issues such as unclear structure-activity relationships, poor controllability, and limited practicality remain unresolved. Therefore, effective methods are required to tune the multicolor afterglow characteristics of specific systems using RTP and TADF.…”

Section: Introductionmentioning

confidence: 99%

Tailored Fabrication of Full‐Color Ultrastable Room‐Temperature Phosphorescence Carbon Dots Composites with Unexpected Thermally Activated Delayed Fluorescence

Ai,

Xiang,

Xiao

et al. 2024

Advanced Materials

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The development of single‐system materials that exhibit both multi‐color room‐temperature phosphorescence (RTP) and thermally activated delayed fluorescence (TADF) with tunable afterglow colors and channels is challenging. In this study, we developed four metal‐free carbon dots (CDs) through structural tailoring and achieved panchromatic high‐brightness RTP via strong chemical encapsulation in urea. The maximum lifetime and quantum yield reached 2141 ms and 56.55%, respectively. Moreover, CDs‐IV@urea, prepared via core‐shell interaction engineering, exhibited a dual afterglow of red RTP at 622 nm and green TADF. The degree of conjugation and functional groups of precursors affected the binding interactions of the nitrogen cladding on CDs, which in turn stabilized triplet energy levels and affected the energy gap between S1 and T1 (ΔEST) to induce multi‐color RTP. The enhanced wrapping interaction lowered the ΔEST, promoting reverse intersystem crossing, which leads to phosphorescence and TADF. This strong core‐shell interaction fully stabilized the triplet state, thus stabilizing the material in water, even in extreme environments such as strong acids and oxidants. These afterglow materials were tested in multi‐color, time, and temperature multi‐encryption as well as in multi‐color in vivo bioimaging. Hence, these materials have promising practical applications in information security as well as biomedical diagnosis and treatment.This article is protected by copyright. All rights reserved

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“…This roomtemperature phosphorescence phenomenon awakened by photoexcitation is often referred to as light-induced RTP. [34][35][36][37] As for TPA3BP@PVP doped film, a fluorescence peak at 455 nm was recorded when excited with light at 365 nm. In delay emission spectra (Figure 4C, delay time = 8 ms), TPA3BP@PVP exhibited a strong phosphorescence emission at 506 nm with a 59.59 ms lifetime.…”

mentioning

confidence: 99%

Construction of multi‐decay pathways and realizing polymer‐regulated organic smart luminescent materials

Xiao,

Xie,

Shen

et al. 2024

FlexMat

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The construction of multi‐decay pathways of smart organic light‐emitting materials has drawn intensive research enthusiasm owing to their substantial promise in diverse optoelectronic applications. Nowadays, numerous chemical substances have been refined to extend and enhance their intriguing luminescent properties. Nowadays, plenty of chemicals have been adapted to amplify more interesting luminescent properties. How to utilize an easy way to tune multi‐decay pathways resulting in various emissions is still challenging. Here, we present a triphenylamine derivative, TPA3BP, which exhibits a variety of multi‐decay pathways in different states and can exhibit thermally activated delayed fluorescence in both the polydimethylsiloxane and crystalline state, but also achieve room temperature phosphorescence by embedding it into the poly (methyl methacrylate) (PMMA) and polyvinyl pyrrolidone matrix. The multi‐decay luminescence can be attributed to the dual effect arising from the n‐π* transition of TPA3BP and the regulation of molecular transition pathways within the matrix environment. This intriguing phenomenon highlights the combined influence of TPA3BP's electronic transitions and the influence of the polarity and rigidity of the surrounding matrix on the observed characteristics. This advancement has widened the structural possibilities for multi‐decay luminescent materials, enabling their targeted synthesis for future applications, such as information encryption and smart anti‐counterfeiting.

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H2O2-assisted detection of melamine using fluorescent probe based on corn cob carbon dots-Ionic Liquid-Silver nanoparticles

Cited by 13 publications

References 37 publications

A Glance at Novel Ionanofluids Incorporating Silk-Derived Carbon Dots

A Glance at Novel Ionanofluids Incorporating Silk-Derived Carbon Dots

Tailored Fabrication of Full‐Color Ultrastable Room‐Temperature Phosphorescence Carbon Dots Composites with Unexpected Thermally Activated Delayed Fluorescence

Construction of multi‐decay pathways and realizing polymer‐regulated organic smart luminescent materials

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