Self-healing, luminescent metallogelation drivenby synergistic metallophilic and fluorine–fluorine interactions

Kalle Kolari, Evgeny Bulatov, Rajendhraprasad Tatikonda, Kia Bertula, Elina Kalenius, Nonappa Nonappa, Matti Haukka

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Square planar platinum(II) complexes are attractive building blocks for multifunctional soft materials due totheir unique optoelectronic properties. However, for soft materials derived from synthetically simple discretemetal complexes, achieving a combination of optical properties, thermoresponsiveness and excellentmechanical properties is a major challenge. Here, we report the rapid self-recovery of luminescent metallogelsderived from platinum(II) complexes of perfluoroalkyl and alkyl derivatives of terpyridine ligands. Using singlecrystal X-ray diffraction studies, we show that the presence of synergistic platinum–platinum (PtPt) metallo-polymerization and fluorine–fluorine (FF) interactions are the major drivingforces in achieving hierarchicalsuperstructures. The resulting bright red gels showedthe presence of highly entangled three-dimensionalnetworks and helical nanofibres with both (PandM) handedness. The gels recoverupto87%oftheiroriginalstorage modulus even after several cycles under oscillatory step-strain rheological measurements showingrapid self-healing. The luminescence properties, along with thermo- and mechanoresponsive gelation,provide the potential to utilize synthetically simplediscrete complexes in advanced optical materials.
Original languageEnglish
Pages (from-to)2795-2802
Number of pages8
JournalSoft Matter
Issue number11
Publication statusPublished - 14 Feb 2020
MoE publication typeA1 Journal article-refereed

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  • Projects

    HYBER: The Academy of Finland's Centre of Excellence in Molecular Engineering of Biosynthetic Hybrid Materials research (2014-2019)

    Cherian, T., Nonappa, N., Ikkala, O., Bertula, K., Morits, M., Hynninen, V., Myllymäki, T., Toivonen, M., Sohrabi, F., Haataja, J., Sanchez Sanchez, A., Rissanen, S. & Poutanen, M.


    Project: Academy of Finland: Other research funding



    Anna Rissanen (Manager)

    Aalto University

    Facility/equipment: Facility

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