Synthesis of fluorescent ionic liquid-functionalized silicon nanoparticles with tunable amphiphilicity and selective determination of Hg²⁺

Abstract

Label-free fluorescent ionic liquid-functionalized silicon nanoparticles with tunable amphiphilicity for highly sensitive and selective detection of Hg2+ were synthesized.

Targeted Development of Sustainable Green Catalysts for Oxidation of Alcohols via Tungstate-Decorated Multifunctional Amphiphilic Carbon Quantum Dots

“…Therefore, simultaneous attendance of both hydrophilic and hydrophobic groups on the CQDs surfaces to prepare amphiphilic CQDs is a key prerequisite. Suitable surface modification using amidation reaction between amine modifiers and surface −COOH functional groups is a routine procedure for the fabrication of amphiphilic CQDs. − However, there are a few reports in the field of amphiphilic CQDs synthesis and their application, especially their modification using ILs as a surface modifier. ,,− On the basis of these unique susceptibilities of CQDs, as well as easy and diverse synthesis methods from inexpensive and available sources, and also their excellent performance as a metal-free catalyst or catalyst support in the oxidation reactions especially alcohols oxidation, − amphiphilic CQDs can be attractive candidates as the catalyst basis for the stabilization of catalytic species.…”

Nitrogen‐rich silicon quantum dots: facile synthesis and application as a fluorescent ‘on–off–on’ probe for sensitive detection of Hg2+ and cyanide ions

“…298 K, 303 K, and 313 K was investigated (Figure 11). The obtained results were then analyzed using the Stern-Volmer equation [32] : CdS/ZnS/As -0.25 μM [44] N-CQDs 0-20 μM 0.63 μM [45] SiNPs 0.001-0.4 μM 2.676 μM [46] IL@SiNPs 0-40 μM 0.45 μM [47] N,S-CDs 0.5-50 μM 8 3 n M [48] N-SiQDs 0.1-4 μM 2 4 n M [26] PDA NPs 0-10 μM 0.19 μM [49] N-CDs-RhB@COF 0.048-10 μM 15.9 nM [50] S-CDs 0.05-5.8 μM 33.3 nM Hg 2+ -GQDs Fluorescence 'turn-on' 0.5-8 μM 0.17 μM [57] CDs and AuNCs Ratiometric fluorescence 8 nM-12.5 μM and 12.5-75 μM 8 n M [58] CDs/AuNCs-PVA@CA Ratiometric fluorescence 0.2-20 μM 150 nM [59] DE-AuNC Ratiometric fluorescence 0.02-1 μM 1 0 n M [60] g-C3N4-Hg 2+ Fluorescence 'turn-on' -1.5 μM Hg 2+ ions (soft acids) showed a high affinity to nitrogen atoms (soft bases) on the surface of the NR-SiQDs. [41] Therefore, NR-SiQDs could conjugate with Hg 2+ to form NR-SiQDs/Hg 2+ complexes through coordination interactions.…”

Tuning the photophysical and photo acidic properties of N-methyl-6-oxyquinolonium-based ionic liquid dyes: the role of solvent and substitution effects investigated by a TD-D3-DFT approach

“…They have been used as fluorescent probes for cellular imaging and as sensing materials for detecting metal ions and other analytes in solution. [33][34][35][36][37][38] Fluorescent ILs are important luminescent materials and have aroused extensive interest in recent years owing to their extensive applications in chiral analysis, 39,40 crystal materials, 41 and the sensing of metal ions, [42][43][44] nitroaromatic compounds, 45,46 bio-macromolecules, 47 and radicals. 48,49 A novel anion-functionalized fluorescent IL has been designed and prepared by Che et al, 50 which was capable of capturing sulfur dioxide with high capacity and could also be used as a good colorimetric and fluorescent SO 2 sensor.…”