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Elastic and mechanofluorochromic hybrid films with POSS-capped polyurethane and polyfluorene

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Abstract

We designed and manufactured elastic hybrid materials consisting of polyhedral oligomeric silsesquioxane (POSS)-capped polyurethane (PUPOSS) and polyfluorene (PF). The POSS group that showed extremely-high affinity with conjugated polymers was introduced at the ends of the PU main chain. As a result, homogeneous films were readily obtained through simple mixing with PUPOSS and PF in organic solvents followed by drying. From the series of resulting hybrid films, the sample with 0.5 wt% PF had good elasticity and exhibited photoluminescence (PL) from both locally-excited (LE) and excimer states of PF. Furthermore, owing to elasticity of the PU hybrids, it was clearly shown that luminescent colors were varied by stretching the film samples attributable to alteration of the intensity ratio between the LE and excimer emission. Moreover, similar to conventional hybrid materials, it was shown that hybridization mediated by POSS plays significant roles in improvements of thermal stability, absolute PL quantum yields, mechanical properties and sensitivity. Our strategy based on the POSS-based hybrids is valid not only for tuning physical properties of polymers without spoiling the main features but also for incorporating additional new functions.

Graphical abstract: Elastic and mechanofluorochromic hybrid films with POSS-capped polyurethane and polyfluorene

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Publication details

The article was received on 15 Feb 2019, accepted on 08 Apr 2019 and first published on 11 Apr 2019


Article type: Research Article
DOI: 10.1039/C9QM00100J
Mater. Chem. Front., 2019, Advance Article

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    Elastic and mechanofluorochromic hybrid films with POSS-capped polyurethane and polyfluorene

    M. Gon, K. Kato, K. Tanaka and Y. Chujo, Mater. Chem. Front., 2019, Advance Article , DOI: 10.1039/C9QM00100J

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