Repository logo
  • English
  • 中文
Log In
Have you forgotten your password?
  1. Home
  2. College of Science / 理學院
  3. Atmospheric Sciences / 大氣科學系
  4. Ultraviolet and visible complex refractive indices of secondary organic material produced by photooxidation of the aromatic compounds toluene and m-xylene
 
  • Details

Ultraviolet and visible complex refractive indices of secondary organic material produced by photooxidation of the aromatic compounds toluene and m-xylene

Journal
Atmospheric Chemistry and Physics
Journal Volume
15
Journal Issue
3
Pages
1435-1446
Date Issued
2015
Author(s)
Liu, P. F.
Abdelmalki, N.
HUI-MING HUNG  
Wang, Y.
Brune, W. H.
Martin, S. T.
DOI
10.5194/acp-15-1435-2015
URI
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000349799500019&KeyUID=WOS:000349799500019
http://scholars.lib.ntu.edu.tw/handle/123456789/391599
Abstract
Secondary organic material (SOM) produced by the oxidation of anthropogenic volatile organic compounds can be light-absorbing (i.e., brown carbon). Spectral data of the optical properties, however, are scarce. The present study obtained the continuous spectra of the real and imaginary refractive indices (m=n-ik) in the ultraviolet (UV)-to-visible region using spectroscopic ellipsometry for n and UV-visible spectrometry for k. Several different types of SOM were produced in an oxidation flow reactor by photooxidation of toluene and m-xylene for variable concentrations of nitrogen oxides (NOx). The results show that the k values of the anthropogenically derived material were at least 10 times greater than those of the biogenically derived material. The presence of NOx was associated with the production of organonitrogen compounds, such as nitro-aromatics and organonitrates, which enhanced light absorption. Compared with the SOM derived from m-xylene, the toluene-derived SOM had larger k values, as well as a greater NOx-induced enhancement, suggesting different brown-carbon-forming potentials of different aromatic precursor compounds. The results imply that anthropogenic SOM produced around urban environments can have an important influence on ultraviolet irradiance, which might consequently influence photochemical cycles of urban pollution. © 2015 Author(s).
SDGs

[SDGs]SDG11

Other Subjects
atmospheric chemistry; nitrogen oxides; organic matter; photooxidation; refractive index; toluene; volatile organic compound; xylene
Type
journal article

臺大位居世界頂尖大學之列,為永久珍藏及向國際展現本校豐碩的研究成果及學術能量,圖書館整合機構典藏(NTUR)與學術庫(AH)不同功能平台,成為臺大學術典藏NTU scholars。期能整合研究能量、促進交流合作、保存學術產出、推廣研究成果。

To permanently archive and promote researcher profiles and scholarly works, Library integrates the services of “NTU Repository” with “Academic Hub” to form NTU Scholars.

總館學科館員 (Main Library)
醫學圖書館學科館員 (Medical Library)
社會科學院辜振甫紀念圖書館學科館員 (Social Sciences Library)

開放取用是從使用者角度提升資訊取用性的社會運動,應用在學術研究上是透過將研究著作公開供使用者自由取閱,以促進學術傳播及因應期刊訂購費用逐年攀升。同時可加速研究發展、提升研究影響力,NTU Scholars即為本校的開放取用典藏(OA Archive)平台。(點選深入了解OA)

  • 請確認所上傳的全文是原創的內容,若該文件包含部分內容的版權非匯入者所有,或由第三方贊助與合作完成,請確認該版權所有者及第三方同意提供此授權。
    Please represent that the submission is your original work, and that you have the right to grant the rights to upload.
  • 若欲上傳已出版的全文電子檔,可使用Open policy finder網站查詢,以確認出版單位之版權政策。
    Please use Open policy finder to find a summary of permissions that are normally given as part of each publisher's copyright transfer agreement.
  • 網站簡介 (Quickstart Guide)
  • 使用手冊 (Instruction Manual)
  • 線上預約服務 (Booking Service)
  • 方案一:臺灣大學計算機中心帳號登入
    (With C&INC Email Account)
  • 方案二:ORCID帳號登入 (With ORCID)
  • 方案一:定期更新ORCID者,以ID匯入 (Search for identifier (ORCID))
  • 方案二:自行建檔 (Default mode Submission)
  • 方案三:學科館員協助匯入 (Email worklist to subject librarians)

Built with DSpace-CRIS software - Extension maintained and optimized by 4Science