Detailed Information on Publication Record
2005
The Electrodeless Discharge Lamp: A Prospective Tool for Photochemistry Part 5: Fill Material-Dependent Emission Characteristics
MÜLLER, Pavel, Petr KLÁN and Vladimír CÍRKVABasic information
Original name
The Electrodeless Discharge Lamp: A Prospective Tool for Photochemistry Part 5: Fill Material-Dependent Emission Characteristics
Name in Czech
Emisní charakteristiky EDL
Authors
MÜLLER, Pavel (203 Czech Republic), Petr KLÁN (203 Czech Republic, guarantor) and Vladimír CÍRKVA (203 Czech Republic)
Edition
Journal of Photochemistry and Photobiology A: Chemistry, Amsterdam, The Netherlands, Elsevier Science, 2005, 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
Impact factor
Impact factor: 2.286
RIV identification code
RIV/00216224:14310/05:00012594
Organization unit
Faculty of Science
UT WoS
000228150900006
Keywords in English
Photochemistry; Microwave; Electrodeless discharge lamp; Emission; Spectra
Tags
International impact
Změněno: 23/6/2009 15:28, prof. RNDr. Petr Klán, Ph.D.
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. Cirkva, J. Photochem. Photobiol. A: Chem. 158 (2003) 1]. Now we report on the emission characteristics (250-650 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
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. Cirkva, J. Photochem. Photobiol. A: Chem. 158 (2003) 1]. Now we report on the emission characteristics (250-650 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.
Links
| GA203/02/0879, research and development project |
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| MSM0021622413, plan (intention) |
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