A Schiff-base fluorescent probe - 2-((E)-(quinolin-8-ylimino)methyl)quinolin-8-ol (H7L) was synthesized and evaluated as a chemoselective Zn2+ sensor. Upon treatment with Zn2+, the complexation of H7L with Zn2+ resulted in a red shift with a pronounced enhancement in the fluorescence emission intensity in ethanol solution. Moreover, other common alkali, alkaline earth and transition metal ions failed to induce response or minimal spectral changes. Notably, this chemosensor could distinguish clearly Zn2+ from Cd2+. Fluorescence studies on H7L and H7L-Zn2+ complex reveal that the quantum yield strongly increases upon coordination. The stoichiometric ratio and association constant were evaluated using Benesi-Hildebrand relation giving 1:1 stoichiometry. This further corroborated 1:1 complex formation based on Job's plot analyses. This chemosensor exhibits a very good fluorescence sensing ability to Zn2+ over a wide range of pH.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.saa.2014.12.106 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Ion bridging enables high-voltage polyether electrolytes for quasi-solid-state batteries.
Nat Commun
January 2025
State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, PR China.
Polyether electrolytes have been widely recognized for their favorable compatibility with lithium-metal, yet they are hampered by intrinsically low oxidation thresholds, limiting their potential for realizing high-energy Li-metal batteries. Here, we report a general approach involving the bridge joints between non-lithium metal ions and ethereal oxygen, which significantly enhances the oxidation stability of various polyether electrolyte systems. To demonstrate the feasibility of the ion-bridging strategy, a Zn ion-bridged polyether electrolyte (Zn-IBPE) with an extending electrochemical stability window of over 5 V is prepared, which enables good cyclability in 4.
View Article and Find Full Text PDFCellulose/sodium alginate gel electrolyte membranes with synergistic hydrogen bonding and metal ion coordination networks for high performance aqueous zinc-ion batteries.
Carbohydr Polym
March 2025
Institute of Zhejiang University-Quzhou, 99 Zheda Road, Quzhou 324000, China; National Key Laboratory of Biobased Transportation Fuel Technology, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China. Electronic address:
Cellulose has outstanding potential for application in energy storage batteries due to its high temperature resistance, high electrolyte affinity, renewability, and suppression of the shuttle effect, but single cellulose membranes still suffer from problems such as inhomogeneous pore distribution and unstable three-dimensional network structure. In this study, a green and sustainable regenerative cellulose (RC)/sodium alginate (SA) gel electrolyte membrane is developed by sol-gel process, the double crosslinked network scaffold centered on Zn was constructed by the synergistic hydrogen-bonding and metal ion- coordination network, the stable and uniform pore structure was also formed. The obtained RC-SA gel electrolyte membrane exhibits outstanding performance, featuring a dual crosslinked network with abundant pore structure and numerous polar groups that effectively enhance Zn transport, significantly improving battery cycling performance.
View Article and Find Full Text PDFNovel metal-organic framework coated with chitosan-κ-carrageenan as a platform for curcumin delivery to cancer cells.
Int J Biol Macromol
January 2025
Department of Chemical and Biochemical Engineering, University of Western Ontario, London, ON N6A 5B9, Canada. Electronic address:
Metal-organic frameworks (MOFs) have shown great promise as pH-responsive drug delivery systems, with considerable potential for targeted cancer therapy. In this study, we synthesized a novel curcumin-loaded MOF, named UWO-2 (CUR@UWO-2), and developed its biocomposite form, CS-κ-Cr/CUR@UWO-2, by coating it with chitosan (CS) and κ-carrageenan (κ-Cr). Structural analysis through powder X-ray diffraction (PXRD) confirmed the successful synthesis of UWO-2 and the incorporation of CUR within the MOF structure.
View Article and Find Full Text PDFStepwise Lighting Up Gold(I)-Thiolate Complexes from AIE Nanoaggregates to AIEE Nanoprobes with a ZIF-8 Shell for Glucose Biosensing.
Anal Chem
January 2025
School of Biomedical Engineering, Shenzhen Key Laboratory for Nano-Biosensing Technology, Guangdong Key Laboratory of Biomedical Measurements and Ultrasound Imaging, Marshall Laboratory of Biomedical Engineering, Shenzhen University Medical School, Shenzhen University, Shenzhen 518060, China.
Aggregation-induced emission (AIE) or aggregation-induced emission enhancement (AIEE) has endowed gold species with responsive fluorescent properties, favoring their potential applications in sensing, imaging, and therapy. However, it remains an interesting challenge to fabricate fluorophores with both AIE and AIEE effects. Herein, we presented highly luminescent Au(I) thiolate nanocomplex-based biosensors with Zn induced-AIE and zeolite imidazolate framework (ZIF-8) induced-AIEE effects.
View Article and Find Full Text PDFTime-Dependent Growth of ZnO Nanowires: Unveiling Antibacterial and Photocatalytic Properties.
Langmuir
January 2025
ESYCOM, CNRS-UMR 9007, Université Gustave Eiffel, F-77454 Marne-la-Vallée, France.
This study investigates the synthesis, characterization, and functional properties of well-aligned zinc oxide (ZnO) nanowires (NWs) obtained by a two-step hydrothermal method. ZnO NWs were grown on silicon substrates precoated with a ZnO seed layer. The growth process was conducted at 90 °C for different durations (2, 3, and 4 h) to examine the time-dependent evolution of the nanowire properties.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!