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

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

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)
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Square planar platinum(ii) complexes are attractive building blocks for multifunctional soft materials due to their unique optoelectronic properties. However, for soft materials derived from synthetically simple discrete metal complexes, achieving a combination of optical properties, thermoresponsiveness and excellent mechanical properties is a major challenge. Here, we report the rapid self-recovery of luminescent metallogels derived from platinum(ii) complexes of perfluoroalkyl and alkyl derivatives of terpyridine ligands. Using single crystal X-ray diffraction studies, we show that the presence of synergistic platinum-platinum (PtMIDLINE HORIZONTAL ELLIPSISPt) metallopolymerization and fluorine-fluorine (FMIDLINE HORIZONTAL ELLIPSISF) interactions are the major driving forces in achieving hierarchical superstructures. The resulting bright red gels showed the presence of highly entangled three-dimensional networks and helical nanofibres with both (P and M) handedness. The gels recover up to 87% of their original storage modulus even after several cycles under oscillatory step-strain rheological measurements showing rapid self-healing. The luminescence properties, along with thermo- and mechanoresponsive gelation, provide the potential to utilize synthetically simple discrete complexes in advanced optical materials.

Original languageEnglish
Pages (from-to)2795-2802
Number of pages8
JournalSoft Matter
Issue number11
Publication statusPublished - 21 Mar 2020
MoE publication typeA1 Journal article-refereed

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