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,...

Université de Fribourg

On the reversible photoisomerization of spiropyran-modified zeolite L single crystals

Albuquerque, R. Q. ; Kühni, Joël ; Belser, Peter ; Cola, Luisa De

In: ChemPhysChem, 2010, vol. 11, no. 3, p. 575-578

The reversible photoisomerization of a derivative of spiropyran at the level of a single crystal by using zeolite L is demonstrated. The synthesized spiropyran exhibits rare negative photochromism when dissolved in a 1:1 mixture of H₂O and EtOH The spiropyran is functionalized predominantly at the channel entrances in the case of 4 μm long crystals