Photophysical properties of some fluorescent materials containing 3-methoxy-7H-benzo[de]anthracen-7-one embedded in sol–gel silica hybrids

Rădiţoiu, Alina; Rădiţoiu, Valentin; Culiță, Daniela C.; Băran, Adriana; Anghel, Dan F.; Spataru, Catalin Ilie; Amăriuţei, Viorica; Nicolae, Cristian‐Andi; Wagner, Luminiţa Eugenia

doi:10.1016/j.optmat.2015.03.010

Cited by 4 publications

(1 citation statement)

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“…In recent years, hybrid silica materials became the most used host matrices for organic dyes entrapped or covalently linked [5] into the network, as a result of imparting outstanding optical, mechanical, and thermal properties to the host-guest composite systems. Moreover, modification of the type and amount of organic groups in the hybrid silica materials determined a fine tuning of the dye molecules' environmental surroundings [6]. Therefore, this type of composite materials gained importance for optical devices, such as light concentrators, optical waveguides, or laser dyes [7].…”

Section: Introductionmentioning

confidence: 99%

Fluorescent Silica Hybrid Film-Forming Materials Based on Salicylaldazine

Rădiţoiu

Raduly

et al. 2020

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Fluorescent film-forming materials were obtained by embedding salicylaldazine (SAA) in silica hybrids generated by sol–gel processes from different silane precursors in acid catalysis. Tuned local environments for the fluorophore were generated in the hosting network by modifying silica sols with organic groups through the co-condensation of tetraethylortosilicate (TEOS) and different alkoxysilanes hydrolysis products. The photophysical properties of the luminescent hybrid films were studied in direct relationship with structural, textural, and surface properties and based on interactions between SAA species and the silica hosting network. Film-forming materials were studied in order to determine differences in absorption and fluorescence emission due to the environments around the fluorophore. The variations recorded in the fluorescence emission spectra of the hybrid films were related to interactions established between the fluorophore species and their sterically hindered surroundings of the host hybrid silica, where free molecular motions are restricted. The influence of the type and amount of network modifier and of the fluorophore loading on the transparency of the films and fluorescence intensity was also investigated. The study carried out led to the elucidation of the necessary conditions for obtaining luminescent film-forming materials with high luminescence intensity and transparency useful for the design of new light concentrators.

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Section: Introductionmentioning

confidence: 99%