We performed multiphoton ionization of styrene molecules and observed the formation of styrene and benzene cations, the latter being reported for the first time in the multiphoton ionization of styrene. The formation of the benzene cation reveals an internal conversion from the S state to the S state, which occurs via a S/S conical intersection at 4.66 eV above the minimum of the S state. The present results indicate the position of this conical intersection to be energetically lower than the theoretically calculated value and also the previous experimental observation. The role of dissociative ionization of styrene in the formation of benzene cations in the atmosphere is discussed.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.jpca.4c05621 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Characterization of polyolefins-based pyrolysis oils: A comparison between one-dimensional gas chromatography and two-dimensional gas chromatography.
J Chromatogr A
January 2025
Department of Chemical Engineering, Pennsylvania State University, University Park, PA, 16801, USA; Department of Energy and Mineral Engineering, Pennsylvania State University, University Park, PA, 16801, USA; Institute of Energy and the Environment, Pennsylvania State University, University Park, PA, 16801, USA. Electronic address:
Article Synopsis
- * Using the more advanced GC×GC technique, researchers achieved significantly better product identification, detecting 2.8 to 5.3 times more peaks for various plastic types compared to traditional GC methods.
- * The pyrolysis of mixed plastic types also revealed new chemical products and interaction effects, including a notable increase in toluene yield from co-pyrolysis experiments, indicating complex chemical behavior during the process.
Vibrational Mode-Dependent Circular Dichroism of Jet-Cooled Styrene Oxide.
J Phys Chem Lett
November 2024
Department of Chemistry, Chungbuk National University, Chungbuk 28644, Korea.
Vibrational mode-dependent circular dichroism (CD) effects in vibrational CD spectra are often used to determine the handedness of molecules with multiple chiral centers. Here, we investigate vibrational mode-dependent CD effects in the electronic CD spectra of jet-cooled ()-(+)- and ()-(-)-styrene oxide obtained by using resonant two-photon ionization CD (R2PICD) spectroscopy. Although most fundamental vibronic bands demonstrated CD signatures consistent with that of the origin band, the overtone and combination bands exhibited opposite CD signatures.
View Article and Find Full Text PDFDegradation of Decabromodiphenyl Ether Dispersed in Poly (Acrylo-Butadiene-Styrene) Using a Rotatory Laboratory Pilot Under UV-Visible Irradiation.
Molecules
October 2024
Unité Matériaux et Transformations (UMET), UMR 8207, CNRS, INRAE, Université de Lille, 59000 Lille, France.
The growing volume of plastics derived from electronic waste (e-waste) underscores the imperative for environmentally sustainable strategies for the management of this waste. In light of the paramount importance of this issue, a pilot demonstrator for the decontamination of polymers containing Brominated Flame Retardants (BFRs) has been developed. The objective is to investigate the potential for decontaminating BFR-containing polymers from e-waste via UV-visible irradiation using a rotatory laboratory pilot operating under primary vacuum conditions.
View Article and Find Full Text PDFMolecular insight into algae-derived dissolved organic matters via Fourier-transform ion cyclotron resonance mass spectrometry: Effects of pretreatment methods and electrospray ionization modes.
J Hazard Mater
December 2024
State Key Laboratory of Environment Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. Electronic address:
The release of algae-derived dissolved organic matter (ADOM) significantly increased in serious eutrophication waters, posing great threats to drinking water safety. Thus, the molecular composition decipherment is urgently in need. However, due to unsatisfactory pretreatment and ionization effects, the application of Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) on ADOM was limited.
View Article and Find Full Text PDF[The effect and mechanism of exposure to polystyrene nanoplastics on lipid metabolism in mice liver].
Zhonghua Yu Fang Yi Xue Za Zhi
October 2024
School of Public Health, Capital Medical University, Beijing 100069, China.
To investigate the effect and potential mechanism of exposure to 20 nm polystyrene nanoplastics (PS-NPs) on lipid metabolism in mice liver. An animal experimental model was designed, which was completed from September 2022 to July 2023 on the exposure omics platform of the School of Public Health at Capital Medical University and the Key Laboratory of Environment and Population Health at the Chinese Center for Disease Control and Prevention.1 mg/kg and 10 mg/kg PS-NPs tail vein mice exposure models were constructed.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!