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Computational Design, Synthesis, and Mechanochromic Properties of New Thiophene-Based π-Conjugated Chromophores

Authors

  • Dr. Giacomo Prampolini,

    Corresponding author
    1. Istituto per i Processi Chimico Fisici, Consiglio Nazionale per le Ricerche, Area della Ricerca, via Moruzzi 1, 56125 Pisa (Italy), Fax: (+39) 050-3152230
    • Istituto per i Processi Chimico Fisici, Consiglio Nazionale per le Ricerche, Area della Ricerca, via Moruzzi 1, 56125 Pisa (Italy), Fax: (+39) 050-3152230
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  • Prof. Fabio Bellina,

    Corresponding author
    1. Dipartimento di Chimica e Chimica Industriale, Università di Pisa, via Risorgimento 35, 56126 Pisa (Italy), Fax: (+39) 050-2219260
    • Dipartimento di Chimica e Chimica Industriale, Università di Pisa, via Risorgimento 35, 56126 Pisa (Italy), Fax: (+39) 050-2219260
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  • Dr. Malgorzata Biczysko,

    1. Center for Nanotechnology Innovation@NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, 56127 Pisa (Italy)
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  • Dr. Chiara Cappelli,

    1. Dipartimento di Chimica e Chimica Industriale, Università di Pisa, via Risorgimento 35, 56126 Pisa (Italy), Fax: (+39) 050-2219260
    2. Classe di Scienze, Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa (Italy)
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  • Luciano Carta,

    1. Classe di Scienze, Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa (Italy)
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  • Dr. Marco Lessi,

    1. Dipartimento di Chimica e Chimica Industriale, Università di Pisa, via Risorgimento 35, 56126 Pisa (Italy), Fax: (+39) 050-2219260
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  • Dr. Andrea Pucci ,

    Corresponding author
    1. Istituto per i Processi Chimico Fisici, Consiglio Nazionale per le Ricerche, Area della Ricerca, via Moruzzi 1, 56125 Pisa (Italy), Fax: (+39) 050-3152230
    2. Dipartimento di Chimica e Chimica Industriale, Università di Pisa, via Risorgimento 35, 56126 Pisa (Italy), Fax: (+39) 050-2219260
    • Istituto per i Processi Chimico Fisici, Consiglio Nazionale per le Ricerche, Area della Ricerca, via Moruzzi 1, 56125 Pisa (Italy), Fax: (+39) 050-3152230
    Search for more papers by this author
  • Prof. Giacomo Ruggeri,

    1. Istituto per i Processi Chimico Fisici, Consiglio Nazionale per le Ricerche, Area della Ricerca, via Moruzzi 1, 56125 Pisa (Italy), Fax: (+39) 050-3152230
    2. Dipartimento di Chimica e Chimica Industriale, Università di Pisa, via Risorgimento 35, 56126 Pisa (Italy), Fax: (+39) 050-2219260
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  • Prof. Vincenzo Barone

    1. Classe di Scienze, Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa (Italy)
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Abstract

The possibility of exploiting supramolecular architectures for the preparation of innovative mechanochromic devices has been extended by designing novel thienyl-substituted 1,4-bis(ethynyl)benzene dyes, which are characterized by a conjugated, rigid, rodlike core structure. This new family of chromophores was synthesized according to a simple two-step sequential cross-coupling reaction, and the optical properties were investigated in solution and in a polymeric matrix. To tune the mechanochromic performances in smart polymer materials, a virtual screening was set up that was able to select a derivative with optimal spectral features. The effective combination of experimental and computational investigations allowed us to spot those homologues with already potential anisotropic and aggregachromic features and characterized by the best spectral properties and luminescent response. The best candidate was synthesized and dispersed into a polyethylene matrix, indeed achieving an “in silico designed” mechanochromic material. Besides the specific applications of this novel material, the integration of computational and experimental techniques reported here defines an efficient protocol that can be applied to make a selection among similar dye candidates, which constitute the essential responsive part of such supramolecular devices.

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