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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

343
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
343
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  11. In Situ Synthesis Of Luminescent Cdse Quantum Dots Embedded In Cd(ii) Metallohydrogels: A Hybrid Material For Selective And Naked-eye Sensing Of Hg22+ Ions

In Situ Synthesis of Luminescent CdSe Quantum Dots Embedded in Cd(II) Metallohydrogels: A Hybrid Material for Selective and Naked-Eye Sensing of Hg22+ Ions

Sougata Sarkar1, Pradip K Maji2, Tarak Nath Das1

  • 1Department of Chemistry, Ramakrishna Mission Vivekananda Centenary College, Rahara, Kolkata 700118, India.

Inorganic Chemistry
|April 9, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

This study presents a novel metallo-supramolecular hydrogel for environmental remediation. The hybrid material enables in situ synthesis of cadmium selenide quantum dots (CdSe QDs) for selective mercury ion sensing.

Area of Science:

  • Materials Science
  • Supramolecular Chemistry
  • Environmental Science

Background:

  • Quantum dots (QDs) show promise for environmental remediation.
  • Metallo-supramolecular hydrogels offer unique properties for material fabrication.

Purpose of the Study:

  • To develop a metallo-supramolecular hydrogel for in situ synthesis of QDs.
  • To explore the application of the hybrid material in environmental sensing.

Main Methods:

  • Spontaneous formation of a cadmium(II) metallohydrogel using sodium azide and 4,5-dicyanoimidazole.
  • In situ fabrication of cadmium selenide quantum dots (CdSe QDs) on the metallogel scaffold.
  • Evaluation of the hybrid material for selective sensing of mercury ions (Hg22+).

Main Results:

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  • A highly selective and stimulus-responsive metallohydrogel was formed.
  • Fibrous nanostructures were observed, resulting from metal-ligand coordination and hydrogen bonding.
  • The CdSe QD-tethered metallogel exhibited tunable luminescence.
  • The hybrid material demonstrated selective naked-eye sensing of Hg22+ down to the micromolar level.

Conclusions:

  • Metallo-supramolecular hydrogels can serve as effective scaffolds for QD synthesis.
  • The hybrid luminescent gel shows significant potential for environmental remediation and sensing applications.