Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1381, Issue -, Pages 239-246Publisher
ELSEVIER
DOI: 10.1016/j.chroma.2015.01.005
Keywords
Metal-organic framework; Liquid-phase epitaxy; HKUST-1; Capillary electrochromatography
Funding
- National Natural Science Foundation of China [21375101, 91417301]
- Natural Science Foundation of Hubei [2014CFA077]
- Wuhan Science and Technology Bureau [20140601010057]
- Innovation Seed Fund of Wuhan University School of Medicine
- Fundamental Research Funds for the Central Universities [2014306020202]
- Translational Medical Research Fund of Wuhan University School of Medicine
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Much attention is being paid to applying metal organic frameworks (MOFs) as stationary phases in chromatography because of their fascinating properties, such as large surface-to-volume ratios, high levels of porosity, and selective adsorption. HKUST-1 is one of the best-studied face-centered-cubic MOF containing nano-sized channels and side pockets for film growth. However, growth of HKUST-1 framework inside capillary column as stationary phase for capillary electrochromatography is a challenge work. In this work, we carry out the growth of HKUST-1 on the inner wall of capillary by using liquid-phase epitaxy process at room temperature. The fabricated HKUST-1@capillary can be successfully used for the separation of substituted benzene including methylbenzene, ethylbenzene, styrene, chlorobenzene, bromobenzene, o-dichlorobenzene, benzene series, phenolic acids, and benzoic acids derivates. High column efficiency of 1.5 x 10(5) N/m for methylbenzene was achieved. The formation of HKUST-1 grown in the capillary was confirmed and characterized by scanning electron microscopy images, Fourier transform infrared spectra and X-ray diffraction. The column showed long lifetime and excellent stability. The relative standard deviations for intra-day and inter-day repeatability of the HKUST-1@capillary were lower than 7%. (C) 2015 Elsevier B.V. All rights reserved.
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