Oliden-Sánchez, A.; Sola-Llano, R.; Pérez-Pariente, J.; Gómez-Hortigüela, L.; Martínez-Martínez, V. Confinement of a Styryl Dye into Nanoporous Aluminophosphates: Channels vs. Cavities. Int. J. Mol. Sci.2024, 25, 3577.
Oliden-Sánchez, A.; Sola-Llano, R.; Pérez-Pariente, J.; Gómez-Hortigüela, L.; Martínez-Martínez, V. Confinement of a Styryl Dye into Nanoporous Aluminophosphates: Channels vs. Cavities. Int. J. Mol. Sci. 2024, 25, 3577.
Oliden-Sánchez, A.; Sola-Llano, R.; Pérez-Pariente, J.; Gómez-Hortigüela, L.; Martínez-Martínez, V. Confinement of a Styryl Dye into Nanoporous Aluminophosphates: Channels vs. Cavities. Int. J. Mol. Sci.2024, 25, 3577.
Oliden-Sánchez, A.; Sola-Llano, R.; Pérez-Pariente, J.; Gómez-Hortigüela, L.; Martínez-Martínez, V. Confinement of a Styryl Dye into Nanoporous Aluminophosphates: Channels vs. Cavities. Int. J. Mol. Sci. 2024, 25, 3577.
Abstract
Styryl dyes are generally poor fluorescent molecules inherited from their flexible molecular structures. However, their emissive properties can be boosted by restricting their molecular motions. A tight confinement into inorganic molecular sieves is a good strategy to yield highly fluorescent hybrid systems. In this work, two Mg-aluminophosphate zeotypes (AEL framework, a one-dimensional channeled structure with elliptical pores of 6.5 Å x 4.0 Å; and CHA framework, composed by large cavities of 6.7 Å x 10.0 Å connected by 8-ring narrower windows) were selected for the encapsulation of 4-DASPI dye (trans-4-[4-(Dimethylamino)styryl]-1-methylpyridinium iodide). The synthesis and photophysical properties of 4-DASPI styryl dye occluded within these two types of confinements, AEL and CHA, are optimized and analyzed. The resultant hybrid systems display significantly improved photophysical features compared to 4-DASPI in solution. Molecular simulations reveal a tighter confinement of 4-DASPI in the elliptical channels of AEL, whilst a particular orientation is found within the CHA framework, where one 4-DASPI molecule spans along two adjacent cavities. In the latter scenario, each aromatic ring is positioned on these adjacent cavities and the polymethine chain resides within the 8-ring window, being this confinement slightly less tight than for AEL.
Chemistry and Materials Science, Physical Chemistry
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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