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In situ growth of Zr‐based metal‐organic framework UiO‐66‐NH 2 for open‐tubular capillary electrochromatography
Author(s) -
Tang Pingxiu,
Wang Rong,
Chen Zilin
Publication year - 2018
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.201800057
Subject(s) - capillary electrochromatography , metal organic framework , electrochromatography , chemistry , scanning electron microscope , capillary action , chlorobenzene , analytical chemistry (journal) , fourier transform infrared spectroscopy , zirconium , materials science , chemical engineering , chromatography , capillary electrophoresis , inorganic chemistry , organic chemistry , catalysis , adsorption , engineering , composite material
The high stability and other properties of Zr(IV)‐based metal organic frameworks(MOFs) make it a promising choice for chromatographic separation, while the application in open‐tubular capillary electrochromatography (OT‐CEC) separation has not been explored yet. Herein, we report the first example of the in‐situ growth of UiO‐66‐NH 2 onto the capillary for open‐tubular capillary electrochromatography. UiO‐66‐NH 2 consists of ZrCl 4 and 2‐amino‐1,4‐benzenedicarboxylic acid, which is highly porous and stable in a variety of solvents. The prepared UiO‐66‐NH 2 modified capillary was characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectra (FT‐IR), and the results confirmed the successful growth of the UiO‐66‐NH 2 . The baseline separation of chlorobenzenes, phenoxyacids and two groups of phenols was achieved owing to the combined interaction of π‐π interaction, hydrophobic interaction, molecular sieve effect, electrophoretic migration and hydrogen‐bonding interaction etc. Besides, the prepared capillaries showed good reproducibility, with relative standard deviations (RSDs) for intra‐day, inter‐day and column‐to‐column runs in the range of 1.38–2.60%, 3.39–4.05%, and 3.47–5.03%, respectively. Our work indicates Zr(IV)‐based MOFs are promising materials as stationary phase in CEC separation.