A1 Journal article (refereed)
Self-healing, luminescent metallogelation driven by synergistic metallophilic and fluorine–fluorine interactions (2020)

Kolari, Kalle, Bulatov, Evgeny, Tatikonda, Rajendhraprasad, Bertula, Kia, Kalenius, Elina, Nonappa, Haukka, Matti. (2020). Self-healing, luminescent metallogelation driven by synergistic metallophilic and fluorine–fluorine interactions. Soft matter, 16(11), 2795-2802. https://doi.org/10.1039/C9SM02186H

JYU authors or editors

Kolari, Kalle
Bulatov, Evgeny
Tatikonda, Rajendhraprasad
Kalenius, Elina
Haukka, Matti

Publication details

All authors or editors: Kolari, Kalle; Bulatov, Evgeny; Tatikonda, Rajendhraprasad; Bertula, Kia; Kalenius, Elina; Nonappa; Haukka, Matti

Journal or series: Soft matter

ISSN: 1744-683X

eISSN: 1744-6848

Publication year: 2020

Volume: 16

Issue number: 11

Pages range: 2795-2802

Publisher: Royal Society of Chemistry

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1039/C9SM02186H

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/68049

Abstract

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 (PtPt) metallopolymerization and fluorine-fluorine (FF) 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.

Keywords: gels; coordination complexes; polymers; platinum; fluorine; physical properties; luminescence