The near UV absorption cross-sections and the rate coefficients for the ozonolysis of a series of styrene-like compounds

Person, A. Le; Eyglunent, G.; Daële, Véronique; Mellouki, Abdelwahid; Mu, Yujing

doi:10.1016/j.jphotochem.2007.09.006

Cited by 28 publications

(22 citation statements)

References 27 publications

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“…The spectrum of PPy nanomaterial could not be compared due to insolubility of the sample in the CHCl 3 solution. The spectrum of PIn nanofibers (curve a) shows the characteristic sharp π – π * absorption peak at 267 nm, typical to indene 31. Compared to the optical spectra of PIn, this absorption peak appears to be broader and slightly shifted to lower wavelength at 262 nm in CInPy (curve b).…”

Section: Resultsmentioning

confidence: 96%

Synthesis and characterization of poly (indene‐co‐pyrrole) nanofibers

Goel¹,

Mazumdar²,

Gupta³

2010

Polymers for Advanced Techs

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Nanofibers of poly (indene-co-pyrrole) (CInPy) have been synthesized, using a facile chemical oxidative polymerization reaction. The effect of copolymerization was examined in view of the individually synthesized homopolymer nanostructures of polyindene (PIn) and polypyrrole (PPy). Morphological details of CInPy, studied using scanning electron microscopy (SEM) and transmission electron microscopy, (TEM) reveal the appearance of dense cottony mess, comprising of fine fibers with an average diameter of 5-10 nm. Chemical structural analysis of CInPy, conducted using ultraviolet-visible (UV-Vis), Fourier transform infrared (FTIR), and nuclear magnetic resonance (NMR) spectroscopic techniques, reveals that both PIn and PPy are involved in the formation of copolymer organization. Fluorescence properties of nanosized copolymer are observed in the blue region, with emission l max placed at 395 nm. Conductivity of copolymer nanofibers (2.4 T 10 S3 S/cm) is consistent with the morphology and thermal stability properties of integral homo-polymers. Improved thermal stability and processability along with the enhanced optical and electrical properties of copolymer nanostructures outfit it as a better promising material in optoelectronic and light emitting nanodevices, with reference to nanosized PIn and PPy.y In the present work, we report the synthesis of one-dimensional poly (indene-co-pyrrole) nanofibers, using a facile chemical oxidative polymerization reaction. The effect of copolymerization has been examined, in view of the individually synthesized homopolymer nanostructures of polyindene and polypyrrole. Such study has not, so far, been reported in the literature. The research work is novel and has not been published or produced in any journal in any form till now.

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Section: Resultsmentioning

confidence: 96%

Synthesis and characterization of poly (indene‐co‐pyrrole) nanofibers

Goel¹,

Mazumdar²,

Gupta³

2010

Polymers for Advanced Techs

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“…Figure 4 shows the UV-vis spectra of the Indcopolymers (Ind:St MR = 0.9; Ind:Lim MR = 1.4; Ind: ENB MR = 4.3) relative to those of PInd and Ind. The Ind spectrum (Figure 4(b)) features a characteristic sharp π-π ⁄ absorption peak at 267 nm [20,34], whereas the spectra of PInd and the Ind-copolymers show this absorption peak at approximately 236 nm (Figure 4(a)); this difference is related to the overlap of the π-conjugated bonds of the Ind phenyl groups linked in the polymer backbone. Absorption peaks in the range of 260-280 nm and 270-310 nm are due to the St and Ind phenyl groups, respectively, linked in the polymer backbone, as reported in the literature [31].…”

Section: Resultsmentioning

confidence: 99%

Synthesis of hydrocarbon polymers by cationic polymerization and their thermal properties

Brum

Laux

Forte

2012

Designed Monomers and Polymers

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Cationic homo-and co-polymerization of indene (Ind), styrene (St), limonene (Lim), and 5-ethylidene-2-norbornene (ENB) was performed with AlCl 3 in dichloroethane at À20°C under inert N 2 . The aim of this work is to investigate the effect of the reaction conditions on the molecular weight of polyindene (PInd) obtained by cationic polymerization with AlCl 3 without an electron donor, and also to determine the effect of the use of cyclic diolefin comonomers on the polymer properties. The polymers were synthesized at a monomer/catalyst molar ratio (MR) of 100; St and Lim showed the highest and lowest reactivity, respectively. The polymers were characterized by 13 C and 1 H NMR spectroscopy, Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, size exclusion chromatography, differential scanning calorimetry, and thermogravimetric analysis. PInd with a number average molecular weight (M n ) of 45 Â 10 3 g/mol and a glass transition temperature (T g ) of 207°C was obtained, whereas only oligomeric polylimonenes were obtained. Cyclic diolefins depressed both the M n and T g values of the Ind-copolymers. There was a dramatic decrease in the M n of the polymers: those obtained at a MR of 1:1 in the feed presented M n values lower than 10 4 g/mol, with the exception of poly(Ind-co-ENB), which is cross-linked. Poly(Ind-co-Lim) with lateral double bonds, a comonomer content of 1 to 20 mol%, and T g values in the range of 140-200°C were obtained.

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“…These two VOCs were detected in the atmosphere 19 and were found to be emitted by biomass burning [20][21][22][23] and automobile exhausts. 24,25 (1.6  0.4) 10 -16 (26) (1.7  0.5) 10 -16 (27) 7.8 10 -11 (27) This work focuses for the first time on the formation of SOA from the ozonolysis of 2methylstyrene and indene and investigating the role of their structure and product formation pathways on SOA formation. The experiments were performed using three different trimethylchlorosilane) were purchased from Sigma Aldrich.…”

Section: Introductionmentioning

confidence: 99%

Secondary Organic Aerosol Formation from Aromatic Alkene Ozonolysis: Influence of the Precursor Structure on Yield, Chemical Composition, and Mechanism

et al. 2019

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The influence of the precursor chemical structure on secondary organic aerosol (SOA) formation was investigated through the study of the ozonolysis of two anthropogenic aromatic alkenes: 2-methylstyrene and indene. Experiments were carried out in three different simulation chambers: ICARE 7300L FEP Teflon chamber (ICARE, Orléans, France), EUPHORE FEP Teflon chamber (CEAM, Valencia, Spain) and CESAM evacuable stainless steel chamber (LISA, Créteil, France). For both precursors, SOA yield and growth were studied on a large range of initial concentrations (from ~60 ppbv to 1.9 ppmv) and the chemical composition of both gaseous and particulate phases was investigated at a molecular level. Gas-phase was described using FTIR spectroscopy and on-line gas chromatography coupled to mass spectrometry and particulate chemical composition was analysed i) on-line by thermo-desorption coupled to chemical ionisation mass spectrometry (TD-API-AMS) and ii) off-line by supercritical fluid extraction coupled to gas chromatography and mass spectrometry (SFE-GC-MS). The results obtained from a large set of experiments performed in three different chambers and using several complementary analytical techniques were in very good agreement. SOA yield was up to 10 times higher for indene

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The near UV absorption cross-sections and the rate coefficients for the ozonolysis of a series of styrene-like compounds

Cited by 28 publications

References 27 publications

Synthesis and characterization of poly (indene‐co‐pyrrole) nanofibers

Synthesis and characterization of poly (indene‐co‐pyrrole) nanofibers

Synthesis of hydrocarbon polymers by cationic polymerization and their thermal properties

Secondary Organic Aerosol Formation from Aromatic Alkene Ozonolysis: Influence of the Precursor Structure on Yield, Chemical Composition, and Mechanism

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