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Multiresponsive, easy-reversible, and dual-visual Pt(II) salt nanostructures for advanced anti-counterfeiting application

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Abstract

Smart materials that integrate multi-stimuli response, full reversibility, and dual-visual read-out channel are highly desired for anti-counterfeiting and information encryption applications. Herein, we developed a multiresponsive perchlorate terpyridyl Pt(II) nano complex which could undergo fully reversible conversion between three forms stimulated by water or formaldehyde molecule due to the extent of Pt–Pt interaction. Meanwhile, a dual-visual channel, i.e., the colorimetric channel changed from yellow to orange or red and the corresponding luminescent channel from orange to orange-red or red, has also been found. The weak and equivalent strength of ion-dipole interaction and hydrogen bond that generated between formaldehyde/water and Pt(II) salt result in the easy-control reversibility between the three forms. Furthermore, by introducing different polymer matrices, 1Cl·ClO4@PMMA (1Cl·ClO4: [Pt(tpy)Cl]·ClO4, tpy: 2,2′:6′,2″-terpyridine), PMMA: poly(methyl methacrylate)) and 1Cl·ClO4@PVA (PVA: polyvinyl alcohol) are successfully constructed, which exhibit different reversible behaviors since the PMMA and PVA matrix exert different influences on the strength of hydrogen-bond. Those smart Pt(II) salt nanostructures present great potential for high-security-level anticounterfeiting application.

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Acknowledgements

We gratefully acknowledge financial support from the Major Science and Technology Project of Xinjiang (No. 2022A01006-3), Science Foundation for Outstanding Young People of Xinjiang (No. 2022D01E40), Youth Science Foundation of Xinjiang (No. 2022D01C69), and Tianchi Doctoral program (Nos. TCBS202130 and 51052300573).

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  1. Zhen Su and Depeng Li contributed equally to this work.

Authors and Affiliations

  1. Key Laboratory of Oil and Gas Fine Chemicals Ministry of Education, College of Chemical Engineering, Xinjiang University, Urumqi, 830017, China

    Zhen Su, Depeng Li, Lixin Zhang, Si Tian, Yuhong Su, Xiaoyun Hu, Duan Xiong & Qingqing Guan

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  1. Zhen Su
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  2. Depeng Li
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Correspondence to Xiaoyun Hu or Qingqing Guan.

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Multiresponsive, easy-reversible, and dual-visual Pt(II) salt nanostructures for advanced anti-counterfeiting application

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Su, Z., Li, D., Zhang, L. et al. Multiresponsive, easy-reversible, and dual-visual Pt(II) salt nanostructures for advanced anti-counterfeiting application. Nano Res. 17, 372–381 (2024). https://doi.org/10.1007/s12274-023-6032-0

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