The electrodeless discharge lamp: a prospective tool for
photochemistry. Part 5

J 2004

The electrodeless discharge lamp: a prospective tool for photochemistry. Part 5

MÜLLER, Pavel, Petr KLÁN and Vladimír CÍRKVA

Basic information

Original name

The electrodeless discharge lamp: a prospective tool for photochemistry. Part 5

Name in Czech

Bezkontaktní výbojka jako perspektivní prostředek pro fotochemie. Část 5

Authors

MÜLLER, Pavel (203 Czech Republic, belonging to the institution), Petr KLÁN (203 Czech Republic, guarantor, belonging to the institution) and Vladimír CÍRKVA (203 Czech Republic)

Edition

Journal of Photochemistry and Photobiology A: Chemistry, Amsterdam, The Netherlands, Elsevier Science, 2004, 1010-6030

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10401 Organic chemistry

Country of publisher

Netherlands

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 2.235

RIV identification code

RIV/00216224:14310/04:00010479

Organization unit

Faculty of Science

UT WoS

000228150900006

Keywords in English

Photochemistry; microwave; lamps; emission

Abstract

ORIG CZ

V originále

This work expands our previous research on an original photochemical reactor consisting of the electrodeless discharge lamp (EDL) inside a reaction mixture that generates ultraviolet radiation in the microwave (MW) field. The effects of temperature MW output power of the reactor, and EDL envelope material, were already published [P. Muller, P. Klan, V. Církva, J. Photochem. Photobiol. A: Chem. 158 (2003) 1]. Now we report on the emission characteristics (250650 nm) of various EDLs containing different fill materials (Hg, HgI2, Cd, I2, KI, P, Se, and S). While distinct line emission peaks were found for mercury, cadmium and phosphorus fills, iodine, selenium and sulfur-containing EDLs emitted continuous bands. Sulfur-containing EDLs are proposed for phototransformations that are of environmental interest due to the emission flux comparable to solar terrestrial radiation. It is concluded that the right choice of EDL envelope fill material can be very useful in planning an efficient course of photochemical process without necessity of filtering off the undesirable part of the UV radiation by other tools, such as glass or solution filters or monochromators. Quantum efficiency measurements of the Norrish type II reaction were accomplished to compare usefulness of the EDLs in photochemical applications. Sulfur and phosphorus-containing EDLs were found as the most efficient sources of UV radiation.

In Czech

Bezkontaktní výbojka jako perspektivní prostředek pro fotochemie.

Links

GA203/02/0879, research and development project

Name: Vliv mikrovlnného záření na fotochemické reakce

Investor: Czech Science Foundation, Microwave Irradiation Effect on Photochemical Reactions

MSM 143100005, plan (intention)

Name: Strukturně-funkční vztahy biomolekul a jejich role v metabolismu

Investor: Ministry of Education, Youth and Sports of the CR, Biomolecular Structure-function Relationships and their role in the Metabolism

Citovat

MÜLLER, Pavel, Petr KLÁN and Vladimír CÍRKVA. The electrodeless discharge lamp: a prospective tool for photochemistry. Part 5. Journal of Photochemistry and Photobiology A: Chemistry. Amsterdam, The Netherlands: Elsevier Science, 2004, vol. 171, No 1, p. 51-57. ISSN 1010-6030.

@article{560884,
   author = {Müller, Pavel and Klán, Petr and Církva, Vladimír},
   article_location = {Amsterdam, The Netherlands},
   article_number = {1},
   keywords = {Photochemistry; microwave; lamps; emission},
   language = {eng},
   issn = {1010-6030},
   journal = {Journal of Photochemistry and Photobiology A: Chemistry},
   title = {The electrodeless discharge lamp: a prospective tool for photochemistry. Part 5},
   url = {http://www.sciencedirect.com/science/article/pii/S1010603004004320},
   volume = {171},
   year = {2004}
}

TY  - JOUR
ID  - 560884
AU  - Müller, Pavel - Klán, Petr - Církva, Vladimír
PY  - 2004
TI  - The electrodeless discharge lamp: a prospective tool for photochemistry. Part 5
JF  - Journal of Photochemistry and Photobiology A: Chemistry
VL  - 171
IS  - 1
SP  - 51-57
EP  - 51-57
PB  - Elsevier Science
SN  - 10106030
KW  - Photochemistry
KW  - microwave
KW  - lamps
KW  - emission
UR  - http://www.sciencedirect.com/science/article/pii/S1010603004004320
N2  - This work expands our previous research on an original photochemical reactor consisting of the electrodeless discharge lamp (EDL) inside a reaction mixture that generates ultraviolet radiation in the microwave (MW) field. The effects of temperature MW output power of the reactor, and EDL envelope material, were already published [P. Muller, P. Klan, V. Církva, J. Photochem. Photobiol. A: Chem. 158 (2003) 1]. Now we report on the emission characteristics (250650 nm) of various EDLs containing different fill materials (Hg, HgI2, Cd, I2, KI, P, Se, and S). While distinct line emission peaks were found for mercury, cadmium and phosphorus fills, iodine, selenium and sulfur-containing EDLs emitted continuous bands. Sulfur-containing EDLs are proposed for phototransformations that are of environmental interest due to the emission flux comparable to solar terrestrial radiation. It is concluded that the right choice of EDL envelope fill material can be very useful in planning an efficient course of photochemical process without necessity of filtering off the undesirable part of the UV radiation by other tools, such as glass or solution filters or monochromators. Quantum efficiency measurements of the Norrish type II reaction were accomplished to compare usefulness of the EDLs in photochemical applications. Sulfur and phosphorus-containing EDLs were found as the most efficient sources of UV radiation.
ER  -

MÜLLER, Pavel, Petr KLÁN and Vladimír CÍRKVA. The electrodeless discharge lamp: a prospective tool for photochemistry. Part 5. \textit{Journal of Photochemistry and Photobiology A: Chemistry}. Amsterdam, The Netherlands: Elsevier Science, 2004, vol.~171, No~1, p.~51-57. ISSN~1010-6030.

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