Reversible H 2 O‐responsive Fluorescence Color Transformation and Enhancement Copper Nanoclusters via Mg 2+ Coordination for Information Encryption
Source abstract
Abstract
Abstract A reversible H 2 O‐responsive system based on Mg −2 ‐coordinated copper nanoclusters (CuNCs) is constructed. The dual effect of Mg²⁺‐ligand coordination and H 2 O‐induced hydrogen bonding leads to a thousand‐fold fluorescence enhancement. The quantum yields (QY) increase from 0.9% to 74.5% for the 2‐methylthiourea (MTU) system, and from 0.4% to 20.7% for the thiourea (TU) system, respectively. Notably, yellow‐emitting Y‐Mg‐CuNCs@TU (568 nm) transforms to red‐emitting R‐Mg‐CuNCs@TU (612 nm) upon drying, accompanied by structural changes. Characterizations confirm the crucial roles of coordinated Mg, hydrogen bonding, and lattice H 2 O. The transformation is reversible for over 13 cycles by alternating hydration/dehydration, demonstrating high potential for advanced information encryption applications.
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Research context
OpenAlex topics: Nanocluster Synthesis and Applications · Metal-Organic Frameworks: Synthesis and Applications · Luminescence and Fluorescent Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Chemical Engineering Ocean and Life Sciences Panjin Institute of Industrial Technology Liaoning Key Laboratory of Chemical Additive Synthesis and Separation Dalian University of Technology Panjin Liaoning 124221 China
State Key Laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology Dalian Liaoning 116023 China
Panjin Institute of Industrial Technology Dalian University of Technology Panjin Liaoning 124221 China
Funding
Innovative Research Group Project of the National Natural Science Foundation of China
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