Université de Fribourg

Mechanoresponsive Luminescent Molecular Assemblies : An Emerging Class of Materials

Sagara, Yoshimitsu ; Yamane, Shogo ; Mitani, Masato ; Weder, Christoph ; Kato, Takashi

In: Advanced Materials, 2015, vol. 28, no. 6, p. 1073-1095

The possibility to change the molecular assembled structures of organic and organometallic materials through mechanical stimulation is emerging as a general and powerful concept for the design of functional materials. In particular, the photophysical properties such as photoluminescence color, quantum yield, and emission lifetime of organic and organometallic fluorophores can significantly...

Université de Fribourg

A Thermo‐ and mechanoresponsive cyano‐substituted oligo(p‐phenylene vinylene) derivative with five emissive states

Sagara, Yoshimitsu ; Lavrenova, Anna ; Crochet, Aurélien ; Simon, Yoan C. ; Fromm, Katharina M. ; Weder, Christoph

In: Chemistry - A European Journal, 2016, vol. 22, no. 13, p. 4374–4378

Multiresponsive materials that display predefined photoluminescence color changes upon exposure to different stimuli are attractive candidates for advanced sensing schemes. Herein, we report a cyano-substituted oligo(p-phenylene vinylene) (cyano-OPV) derivative that forms five different solvent-free solid-state molecular assemblies, luminescence properties of which change upon thermal and...

Université de Fribourg

Supramolecular organization of dye molecules in zeolite L channels: synthesis, properties, and composite materials

Cao, Pengpeng ; Khorev, Oleg ; Devaux, André ; Sägesser, Lucie ; Kunzmann, Andreas ; Ecker, Achim ; Häner, Robert ; Brühwiler, Dominik ; Calzaferri, Gion ; Belser, Peter

In: Chemistry - A European Journal, 2016, vol. 22, no. 12, p. 4046–4060

Sequential insertion of different dyes into the 1D channels of zeolite L (ZL) leads to supramolecular sandwich structures and allows the formation of sophisticated antenna composites for light harvesting, transport, and trapping. The synthesis and properties of dye molecules, host materials, composites, and composites embedded in polymer matrices, including two- and three-color antenna systems,...