Zhihao Zhang,Md All Amin Newton,Xue Yang,Binjie Xin
In this study, a novel red fluorescent materials were prepared by incorporating Eu/PVP/TPPO complexes into PAN substrates. An Eu/PVP/TPPO complex was synthesized by introducing polyvinylpyrrolidone (PVP) into a mixture of europium (Eu) and triphenylphosphine oxide (TPPO). Using a spin-coating technique, highly efficient and thermally stable Eu/PVP/TPPO/polyacrylonitrile (PAN) fluorescent films were prepared. The molecular interactions , surface morphology , functional groups, and elements of the Eu/PVP/TPPO/PAN fluorescent films were characterized by FT-IR, SEM, UV–Vis, and EDS analysis. The thermal stability, fluorescent properties, and chromaticity of the films were also systematically investigated. The results showed that the Eu/PVP/TPPO complex could disperse uniformly in the substrate, and the fluorescent films could emit homogeneous red light. Furthermore, the Eu/PVP/TPPO/PAN fluorescent films had a strong synergistic effect, which increased the fluorescence intensity and produced a purer red light. Based on these findings, a new type of redlight LED device was fabricated by one-step method. Due to its outstanding properties, this film has great potential in the next generation of lighting and display applications.
The porous Eu(TTA) 3 (TPPO) 2 /SnO 2 (ETTS, TTA: 2-thenoyltrifluoroacetonate and TPPO : triphenylphosphine oxide) composite was prepared via sol-gel method with tetraethyl orthosilicate (TEOS) as catalyst which showed the cumulate litchi shell-like structure. The Eu(TTA) 3 (TPPO) 2 organic complexes (ETT) could be absolutely distributed into the pores of the SnO 2 matrix at the molecular level through sol-gel process. SiO 2 was used as the hard template which was removed to increase porosity during the prepared process. The red emission of ETTS was exhibited under the 368 nm excitation light, and much better luminescence properties was shown after washing off SiO 2 (ETTS-W) which was about 4 times of unwashed ETTS (ETTS-UW) and 15.6 times of ETT for 615 nm emission when Eu content was 6 wt%. The excellent luminescence property of ETTS-W samples was mainly attributed to the organic ligands, the pore structure after removing SiO 2 and stronger ultraviolet absorption capacity of SnO 2 matrix.
Ningbo Wang,Yinan Wang,Rongrong Zhang,Aili Sun,Yin Lu,Zeming Zhang,Xizhi Shi
Triphenylphosphine oxide (TPPO) as a new organophosphorus flame retardant is extensively used in the industrial and pharmaceutical fields due to its chemical stability and abundance. In marine environments, TPPO accumulates as a result of natural ecological processes. This study aimed to evaluate the accumulation process and toxicological effects of TPPO utilizing mussels ( Mytilus coruscus ), a species traditionally employed in marine monitoring and commonly cultivated in offshore aquaculture. GC–MS/MS was employed to quantify the accumulation of TPPO in the gill, gonad, muscle, and digestive gland tissues of mussels exposed to three sublethal concentrations (20.0, 100.0, and 500.0 μg/L) over durations of 3, 7, 14, and 28 days, as well as the examining of the chemical and molecular parameters. Results showed that the accumulation of TPPO (100.0 and 500.0 μg/L) increased throughout the 28 d of exposure, and the peak accumulation of 20.0 μg/L TPPO was detected on 14 d. Short-term TPPO exposure did not cause oxidative stress in mussels. Chronic exposure for 28 days resulted in significant oxidative damage and oxidative stress in mussels, as evidenced by elevated expression and activity of SOD, increased levels of glutathione and malondialdehyde, and upregulation of HSP70 and HSP90, metallothionein, and CYP4Y1, alongside the initiation of apoptotic cell death. TPPO exposure activated natural immune genes and disrupted lipid metabolism in mussels. This study demonstrated the persistent accumulation of TPPO in mussels, highlighting its ecotoxicological hazards and underscoring the necessity to predict the risks associated with widespread environmental exposure to TPPO.
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