High-Strength Plus Reversible Supramolecular Adhesives Achieved by Regulating Intermolecular PtII ⋅⋅⋅PtII Interactions

Zhao Wang; Kang Huang; Xizi Wan; Mingqian Liu; Yong Chen; Xinghua Shi; Shutao Wang

doi:10.1002/anie.202211495

High-Strength Plus Reversible Supramolecular Adhesives Achieved by Regulating Intermolecular Pt^II ⋅⋅⋅Pt^II Interactions

Angew Chem Int Ed Engl. 2022 Oct 4;61(40):e202211495. doi: 10.1002/anie.202211495. Epub 2022 Sep 5.

Authors

Zhao Wang^{1

2}, Kang Huang^{2

3}, Xizi Wan^{1

2}, Mingqian Liu^{1

2}, Yong Chen^{1

2}, Xinghua Shi^{2

3}, Shutao Wang^{1

2}

Affiliations

¹ CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, CAS Center for Excellence in Nanoscience, Key Laboratory of Photochemical Conversion and Optoelectronic Materials & CAS-HKU Joint Laboratory on New Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
² University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
³ Laboratory of Theoretical and Computational Nanoscience, Key Laboratory for Nanosystem and Hierarchy Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing, 100190, P. R. China.

PMID: 36000163
DOI: 10.1002/anie.202211495

Abstract

Surface adhesion has a great contradiction in high strength and good reversibility given their mutually exclusive requirements of fixed crosslinked networks and dynamic chain motion. Herein, we demonstrate a supramolecular organoplatinum(II) adhesive system regulated by intermolecular Pt^II ⋅⋅⋅Pt^II interactions that can simultaneously achieve high-strength and excellent reversible adhesion to various substrates. Upon alternating temperature, the assembly of suitably substituted organoplatinum(II) molecules can switch between well-ordered and disordered states via tuning Pt^II ⋅⋅⋅Pt^II interactions, resulting in stable reversible adhesion even after 100 cycles with a robust strength of ≈1.25 MPa and a large on-off ratio of ≈25. Along with the switch of Pt^II ⋅⋅⋅Pt^II contacts, the surface adhesion of organoplatinum(II) adhesives can be monitored by their changes in electrical signals. This study will open up new inspirations for developing high-performance reversible adhesives.

Keywords: Metal-Metal Interactions; Platinum(II) Complexes; Reversible Adhesion; Self-Monitoring; Supramolecular Adhesives.

Abstract

Grants and funding