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Extracion and Photoluminescence Properties of Marine Microalgae for Organic Light Emitting Diode Applications (유기발광소자를 위한 해양 미세조류 유래 물질 및 광 발광 탐색)

  • Jung, Sang-Mok;Lee, Han-Seong;Kang, Seul-Gi;Lee, Han-Joo;Son, Ji-Su;Jeon, Jae-Hyuk;Chae, Hee-Baik;Shin, Hyun-Woung
    • Korean Journal of Environment and Ecology
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    • v.29 no.4
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    • pp.564-569
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    • 2015

  • In order to discover materials that can be used for OLED, extractions of marine microalgae was screened for photoluminescence(PL) properties and analyzed using gas chromatography-mass spectrometry(GC-MS). The extractions of Nitzschia denticula, Navicula cancellata and Nannochloropsis salina showed PL spectroscopy among fourteen marine microalgae species. The selected three fractions from three microalgae were analyzed by GC-MS. According to the results, it was found that the identified organic light-emitting materials can be subdivided into three functional groups based on imidazole, purine and quinoline. These chemicals are considered to have a strong relationship with PL spectroscopy for OLED materials.

  • https://doi.org/10.13047/KJEE.2015.29.4.564 인용 PDF KSCI

The Formation of Reactive Species on the Nitrogen Oxide in the Ultraviolet Photolysis of N-Nitrosodimethylamine (N -Nitrosodimethylamine의 자외선 광분해 시 질소산화물 생성에 미치는 반응성 화학종의 형성)

  • Kwon, Joongkuen;Kim, Jongoh;Kwon, Bumgun
    • Journal of the Korean GEO-environmental Society
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    • v.13 no.2
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    • pp.75-81
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    • 2012

  • Because N-Nitrosodimethylamine(NDMA) is well-known as a potential carcinogen, extensive research has addressed its treatment by ultraviolet(UV) and its degradation pathway. However, the detailed mechanism by which NDMA is photolyzed to form oxidized products, i.e., ${NO_2}^-$ and ${NO_3}^-$, is still not understood. This study reveals a key reactive species during the photolysis of NDMA. The study on a key reactive species was indirectly performed with the formation of nitrogen oxidized products and reactions between methanol and an unknown reactive species formed during the photolysis of NDMA. The peroxynitrite($ONOO^-$) generated by the direct UV photolysis of NDMA would be identified as a key reactive species in oxidizing nitrogen intermediates to ${NO_2}^-$and ${NO_3}^-$.

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