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Related Concept Videos

Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
Masking and Demasking Agents01:19

Masking and Demasking Agents

EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on the metal...
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...
Types of Reversible Electrodes01:24

Types of Reversible Electrodes

For electrode reversibility to be maintained, all the reactants and products involved in the half-reaction must be present at the electrode. There are several types of reversible electrodes (half-cells).In metal-metal-ion electrodes, a metal balances electrochemically with a solution of its own ions. Examples are Cu2+|Cu and Zn2+|Zn. Metals that react with the solvent, like group 1 and most group 2 metals, which react with water, and zinc, which reacts with aqueous acidic solutions, cannot be...

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Copper Halide Hybrids Driven by Irreversible Structural Transitions for Anti-Counterfeiting and Traceability.

Bei Xu1,2,3, Chuang-Wei Fan1,2,3, Zhaoyi Wang4

  • 1College of Chemistry, Fuzhou University, Fuzhou 350108, China.

Inorganic Chemistry
|March 13, 2026
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Summary

New copper(I) iodide materials offer irreversible structural transitions for advanced anticounterfeiting. This enables secure, traceable information encryption with enhanced stability and optical properties, preventing tampering and replication.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • High-security anticounterfeiting and traceable information encryption are critical.
  • Conventional fluorescent materials have limitations like complex synthesis and reversible responses.

Purpose of the Study:

  • To develop novel copper(I) iodide hybrid materials for irreversible structural transitions.
  • To create a dual-mode anticounterfeiting platform leveraging these transitions.

Main Methods:

  • Synthesis of two copper(I) iodide hybrid materials (1D-Cu and 2D-Cu).
  • Investigation of ethanol-triggered irreversible structural transformation.
  • Photoluminescence and thermal stability analysis.
  • Structural and spectroscopic characterization (Cu-Cu interactions, interfacial interactions).

Main Results:

  • An irreversible structural transformation from 1D-Cu to 2D-Cu triggered by ethanol was achieved.
  • This transition caused a significant photoluminescence redshift (green to orange-red) and increased photoluminescence quantum yield (PLQY).
  • Enhanced thermal stability and optical performance of 2D-Cu were attributed to strong Cu-Cu and organic-inorganic interactions.

Conclusions:

  • Irreversible structural transitions in copper halide materials show promise for high-security applications.
  • The developed dual-mode anticounterfeiting platform utilizes permanent fluorescence changes for irreversible access records.
  • This research offers a new pathway for advanced anticounterfeiting and traceability solutions.