Anisotropic fluorescence materials: Effect of the synthesis conditions over the incorporation, alignment and aggregation of Pyronine Y within MgAPO-5

作者：Garcia Raquel^*; Martinez Martinez Virginia; Gomez Hortigueela Luis; Lopez Arbeloa Inigo; Perez Pariente Joaquin

来源：Microporous and Mesoporous Materials, 2013, 172: 190-199.

DOI：10.1016/j.micromeso.2013.01.025

• Pyronine Y dye
• MgAPO-5
• Fluorescence
• Encapsulation
• Aggregation

In order to prepare a highly fluorescent anisotropic material, different hydrothermal synthesis conditions have been studied in an attempt to favor the incorporation of the fluorescing dye Pyronine Y as monomeric species within the large-pore nanoporous aluminophosphate MgAPO-5 (AFI-type structure) during its crystallization (one-pot synthesis). Valuable information regarding the dye orientation, molecular distribution and aggregation behaviour inside the nanochannels of MgAPO-5 as a function of the gel composition has been obtained using the FLIM technique (Fluorescence Lifetime Imaging Microscopy). DFT-based calculations of the different dye species occluded within the nanochannels of MgAPO-5 allowed us to explain the properties of the newly synthesised composite materials. Our results show that although H-aggregates can fit within the MgAPO-5 channels, their presence can be reduced by varying the synthesis parameters, in particular by decreasing the template and PY concentration and increasing Mg content.

• 出版日期2013-5-15