Synthesis, Characterization, and Performance of Pyridomethene–BF2 Fluorescence Dye-Doped PVA Thin Film and PVP Nanofibers as Low γ-ray Dosimeters

Abstract

Currently, particular attention is paid to public health related to the field of γ-ray dosimetry, which is becoming increasingly important in medical diagnostic processes. Incorporating sensitive dyes as radiation dose sensors in different material hosts has shown promising radiation dosimetry application routes. In this perspective, the current study proposes a new fluorescent dye based on boron difluoride complex, the pyridomethene–BF2 named 2-(1-(difluoroboraneyl)-1,2-dihydroquinolin-2-yl)-2-(1-methylquinoxalin-2-ylidene) acetonitrile (DBDMA) as an indicator for low γ-ray doses. The different optical and quantum chemical parameters and the spectral behavior of the selected fluorescent dye were first studied. Then, PVP/DBDMA electrospun nanofibers and PVA/DBDMA thin films were prepared. The different UV–vis spectrophotometric and fluorescence studies revealed a clear change after exposure to different γ-ray doses. Thermogravimetric analysis exhibited excellent thermal stability of the prepared nanocomposite films, showing altered thermal behavior after γ-ray treatment. Furthermore, the SEM evaluation displayed a significant modification in the surface morphology of the two designed nanomaterials with increased radiation dose intensity. These novel forms of dosimeter designed in nanoscale composites could therefore constitute a promising and efficient alternative for rapid and accurate detection of low doses of γ-rays in various medical applications.

Response of fluorescent boron difluoride β-diketonates to X-rays

“…Investigation of the effect of ionizing radiation on organic dyes is of interest not only from ecological point of view (dye contamination is a major source of water pollution from textile industries [1], and irradiation is one of the most effective methods of wastewater treatment [2]), but also from the position of creating new dosimetric systems [3][4][5][6]. If in the first case the attention is paid mainly to toxic (mutagenic, carcinogenic, and so on) compounds, for example, azo [7] or anthraquinone dyes [8], then in the second, the priority goes to the dyes with pronounced optical properties.…”

A Study of the Electronic Absorption and Emission Spectra of DBDMA Dye: Solvent Effect, Energy Transfer, and Fluorescence Quenching

“…acetonitrile (DBDMA). DBDMA has been reported as a potential indicator for low c-ray doses [17]. Te absorption and fuorescence properties of the dye in sol-gel glass matrices were investigated and found that the photosol-gel glass matrix of the immobilized dye is the best compared to other diferent photosol-gel and organicinorganic matrices [18].…”