Photochemical fine particle formation in the gas phase from acrolein by a two-photon process

Morita, Hiroshi; Semba, Katsuhiko; Umezawa, Takeshi; Kuwamura, Makoto

doi:10.1016/s0927-7757(98)00443-9

Cited by 11 publications

(10 citation statements)

References 27 publications

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“…The mean diameter of the aerosol particles was not sensitive to the molar ratio of the gaseous mixture of AC and BAz and also to the incident laser intensity. Aerosol particles deposited from AC vapor were white and the diameter was X0.9 pm [8]. Both the color and the particle size of the aerosol particles deposited from the gaseous mixture of BAz and AC showed that BAz participated in aerosol particle formation process.…”

Section: Resultsmentioning

confidence: 98%

“…Besides the use of excimer laser light, nitrogen gas laser light (337.1 nm) was recently applied to initiate polymerization reaction in the gas phase through two-photon process [5], and aerosol particles with a size of several tens of nm to 1 µm were successfully produced from gaseous Acrolein (2-propenal) (AC) [6]. This technique was further developed to synthesize composite particles from gaseous mixtures of AC and some organosilicon compounds such as trimethyl(2-propynyloxy)silane (TMPSi) and vinyltrimethoxysilane [7,8]; chemical species of sedimentary aerosol particles were analyzed by X-ray photoelectron spectroscopy (XPS), and it was found that organosilicon compounds were incorporated into the polymerization reaction of AC molecules in aerosol particle formation, and that the chemical species of Si compounds in the sedimentary aerosol particles were largely dependent on chemical reactivity of the parent organosilicon compounds.…”

Section: Introductionmentioning

confidence: 99%

“…Under irradiation with N2 laser light, nuclea-tion process in aerosol particle formation from AC vapor is a two-photon process [8,9]. Utilization of a sensitization mechanism to the process has practical importance to improve the efficiency of nucleation reaction.…”

Section: Introductionmentioning

confidence: 99%

“…Utilization of a sensitization mechanism to the process has practical importance to improve the efficiency of nucleation reaction. Actually, this was successfully performed by using one-photon decomposition of formaldehyde (H2CO) molecule in a gaseous mixture of H2CO and AC [8].…”

Section: Introductionmentioning

confidence: 99%

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Laser Synthesis of Aerosol Particles from a Gaseous Mixture of Butyl Azide and Acrolein.

Morita

Kihou

Semba

et al. 1999

J. Photopol. Sci. Technol.

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From a gaseous mixture of butyl azide (BAz) and acrolein, sedimentary aerosol particles were produced under irradiation with N2 laser light, in addition to a film which deposited all over the side wall of the irradiation cell. The yield of the sedimentary aerosol particles, the main chemical component of which was polyacrolein, increased with increasing laser intensity and with increasing the partial pressure of BAz, indicating that BAz increased the efficiency of aerosol particle formation, although its light absorptivity at 337.1 nm is very small. To elucidate the nucleation process of the aerosol particles, monitor (He-Ne laser) light intensity scattered by the aerosol particles as formed from the gaseous mixture was measured under irradiation with N2 laser light. Characteristic behavior of the scattered light intensity indicated that nucleation proceeded only through the photochemical reaction of BAz at low laser intensity (1.5 mJ/pulse), but at higher laser intensity (z 1.9 mJ/pulse) nucleation due to photochemical reaction of acrolein followed the nucleation through photochemical reaction of BAz.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Laser Synthesis of Aerosol Particles from a Gaseous Mixture of Butyl Azide and Acrolein.

Morita

Kihou

Semba

et al. 1999

J. Photopol. Sci. Technol.

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“…Fine particle formation from acroein (2-propenal) (AC) vapor has been studied extensively [1,2]. Under light irradiation with N2 laser or with a medium pressure mercury lamp through a UV31 filter, AC vapor produced sedimentary aerosol particles of polyacrolein (polyAC).…”

Section: Introductionmentioning

confidence: 99%

Photochemical Surface Modification of Polyacrolein Particles by Gaseous Tetramethylcyclotetrasiloxane.

Morita

Tonooka

2001

J. Photopol. Sci. Technol.

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The surface of sedimentary aerosol particles of polyacrolein (polyAC) was chemically modified by 1,3,5,7-tetramethylcyclotetrasiloxane (ITS) vapor under light irradiation with a low pressure mercury lamp and with N2 laser. FT-IR spectra measured with the surfacemodified polyAC particles strongly suggested that Si-0 bond of electronically excited TTS molecule was cleaved and the resulting active end groups produced silacyclobutane structure at one end or Si0-C bond at the other end on the surface of polyAC particles. Prolonged light irradiation with a low pressure mercury lamp produced poly(methylsiloxane) as the major product. From a gaseous mixture of TI'S and AC, composite aerosol particles were produced under irradiation with a medium pressure mercury lamp through a UV31 and a UVD33S filters. Aerosol particle formation process of the gaseous mixture was monitored by measuring monitor (He-Ne laser) light intensity scattered by the aerosol particles which were produced under light irradiation. With increasing partial pressure of TTS, induction period to detect scattered light became longer and the scattered light intensity became weaker. These results strongly suggested that electronically excitedAC molecules were consumed by the chemical reaction with TTS to induce polymerization reaction of US.

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N2 laser-induced formation of copolymeric ultrafine particles in a gaseous tetraethenylgermane–carbon disulfide mixture

Morita

Semba

Bastl

et al. 2005

Journal of Photochemistry and Photobiology A: Chemistry

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Photochemical fine particle formation in the gas phase from acrolein by a two-photon process

Cited by 11 publications

References 27 publications

Laser Synthesis of Aerosol Particles from a Gaseous Mixture of Butyl Azide and Acrolein.

Laser Synthesis of Aerosol Particles from a Gaseous Mixture of Butyl Azide and Acrolein.

Photochemical Surface Modification of Polyacrolein Particles by Gaseous Tetramethylcyclotetrasiloxane.

N2 laser-induced formation of copolymeric ultrafine particles in a gaseous tetraethenylgermane–carbon disulfide mixture

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