Surface-enhanced infrared detection of benzene in air using a porous metal-organic-frameworks film

Infrared (IR) spectroscopy is a powerful technique for observing organic molecules, as it combines sensitive vibrational excitations with a non-destructive probe. However, gaseous volatile compounds in the air are challenging to detect, as they are not easy to immobilize in a sensing device and give...

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Bibliographic Details
Published inThe Korean journal of chemical engineering Vol. 36; no. 6; pp. 975 - 980
Main Authors Kim, Raekyung, Jee, Seohyeon, Ryu, Unjin, Lee, Hyeon Shin, Kim, Se Yun, Choi, Kyung Min
Format Journal Article
LanguageEnglish
Published New York Springer US 01.06.2019
Springer Nature B.V
한국화학공학회
Subjects
Benzene
Biotechnology
Catalysis
Chemistry
Chemistry and Materials Science
Electronic
Hydrocarbons
Industrial Chemistry/Chemical Engineering
Infrared spectroscopy
Inorganic
Materials (Organic
Materials Science
Metal-organic frameworks
Nanocrystals
Organic chemistry
Spectrum analysis
Spin coating
Substrates
Thin Films
Volatile compounds
화학공학
Volatile Organic Compounds
Porous Film
Surface-enhanced IR Spectroscopy
Plasmon Resonance
Metal-organic Frameworks
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Summary:Infrared (IR) spectroscopy is a powerful technique for observing organic molecules, as it combines sensitive vibrational excitations with a non-destructive probe. However, gaseous volatile compounds in the air are challenging to detect, as they are not easy to immobilize in a sensing device and give enough signal by themselves. In this study, we fabricated a thin nanocrystalline metal-organic framework (nMOF) film on a surface plasmon resonance (SPR) substrate to enhance the IR vibration signal of the gaseous volatile compounds captured within the nMOF pores. Specifically, we synthesized nanocrystalline HKUST-1 (nHKUST-1) particles of ca. 80 nm diameter and used a colloidal dispersion of these particles to fabricate nHKUST-1 films by a spin-coating process. After finding that benzene was readily adsorbed onto nHKUST-1, an nHKUST-1 film deposited on a plasmonic Au substrate was successfully applied to the IR detection of gaseous benzene in air using surface-enhanced IR spectroscopy.
ISSN:0256-1115
1975-7220
DOI:10.1007/s11814-018-0231-0