Spectral properties of quinine sulfate in PVA films for front-face format emission measurements
The luminescence properties of quinine sulfate (QS) embedded in poly(vinyl alcohol) (PVA) film have been studied in detail. Fluorescence excitation and emission spectra were measured using a front-face configuration, and the corresponding intensities were tabulated. A fluorescence quantum yield of 0.51 was determined for QS-doped PVA, using QS dissolved in 1N H<sub>2</sub>SO<sub>4</sub>. Both excitation and emission anisotropy measurements indicated effective immobilization of QS molecules within the polymer matrix. The fluorescence lifetime of QS-doped PVA was measured using a picosecond-pulsed 375 nm laser diode and analyzed with both exponential and Lorentzian distribution models. The broad lifetime distribution suggests a complex interaction between QS molecules and the polymer matrix. The QS-doped PVA films are well suited for measurements involving solid materials and front-face geometries.
Authors
- Danh Pham (ORCID: https://orcid.org/0000-0003-0274-9640)
- Rajveer Sagoo
- Trang Thien Pham
- Bong Lee
- R Max Petty
- Ignacy Gryczynski
- Agnieszka Malgorzata Jablonska
- Zygmunt Gryczynski
Institutions
- Texas Christian University (US)
Publication Details
- Journal
- Methods and Applications in Fluorescence
- Published
- 2026-02-18
- DOI
- https://doi.org/10.1088/2050-6120/ae47bd
- Primary Topic
- Polymer Nanocomposite Synthesis and Irradiation
- Type
- article
- Field-Weighted Citation Impact
- 0.00