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나노물질 및 화학반응 연구단
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Nanocage-Confined Synthesis of Fluorescent Polycyclic Aromatic Hydrocarbons in Zeolite

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Title
Nanocage-Confined Synthesis of Fluorescent Polycyclic Aromatic Hydrocarbons in Zeolite
Author(s)
Seung Hyeon Ko; Taekyoung Lee; Hongjun Park; Doo-Sik Ahn; Kyoungsoo Kim; Yonghyun Kwon; Sung June Cho; Ryong Ryoo
Publication Date
2018-06
Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.140, no.23, pp.7101 - 7107
Publisher
AMER CHEMICAL SOC
Abstract
Polycyclic aromatic hydrocarbons (PAHs) attract much attention for applications to organic light-emitting diodes, field-effect transistors, and photovoltaic cells. The current synthetic approaches to PAHs involve high-temperature flash pyrolysis or complicated step-bystep organic reactions, which lead to low yields of PAHs. Herein, we report a facile and scalable synthesis of PAHs, which is carried out simply by flowing acetylene gas into zeolite under mild heating, typically at 400 degrees C and generates the products of 0.30 g g(-1) zeolite. PAHs are synthesized via acetylene polymerization inside Ca2+-ion-exchanged Linde type A (LTA) zeolite, of which the alpha-cage puts a limit on the product molecular size as a confined-space nanoreactor. The resultant product after the removal of the zeolite framework exhibits brilliant white fluorescence emission in N-methylpyrrolidone solution. The product is separated into four different color emitters (violet, blue, green, and orange) by column chromatography. Detailed characterizations of the products by means of various spectroscopic methods and mainly mass spectrometric analyses indicate that coronene (C24H12) is the main component of the blue emitter, while the green emitter is a mixture of planar and curved PAHs. The orange can be attributed to curved PAHs larger than ovalene, and the violet to smaller molecules than coronene. The PAH growth mechanism inside Ca2+ -exchanged LTA zeolite is proposed on the basis of mass spectral analyses and density functional theory calculations
URI
https://pr.ibs.re.kr/handle/8788114/5451
ISSN
0002-7863
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
J. Am. Chem. Soc. 2018, 140, 7101−7107.pdfDownload

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