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- W2021218094 abstract "Ring-opening metathesis polymerization (ROMP) derived monoliths were prepared from 5-norborn-2-enemethyl bromide (NBE-CH2Br) and tris(5-norborn-2-enemethoxy)methylsilane ((NBE-CH2O)3SiCH3) within the confines of surface-silanized borosilicate columns (100 mm × 3 mm I.D.), applying Grubbs’ first generation benzylidene-type catalyst [RuCl2(PCy3)2(CHPh)]. Two monoliths of the same recipe were converted into strong anion-exchangers applying two different approaches. Monolith I was prepared by a two-step reaction of the poly(NBE-CH2-Br) moieties with diethyl amine forming a weak-anion exchanger followed by reaction (quaternization) with ethyl iodide. Monolith II was prepared via a single-step reaction of the poly(NBE-CH2-Br) moieties with triethyl amine. The resulting monolithic anion-exchangers prepared demonstrated a good aptitude for the anion-exchange separation of single-stranded nucleic acids (ss-DNA). However, monolith II showed superior separation efficiency compared to monolith I indicated by sharper analyte peaks and better resolution values for the 5′-phosphorylated oligodeoxythymidylic acids fragments. On monolith II, the seven fragments of [d(pT)12–18] were baseline separated in less than 9 min. The influence of the buffer pH on the separation efficiency was studied applying a phosphate (0.05 mol/L, pH 7 and 8) and Tris–HCl buffer (0.05 mol/L, pH 9), respectively." @default.
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- W2021218094 date "2011-12-01" @default.
- W2021218094 modified "2023-10-18" @default.
- W2021218094 title "Ring-opening metathesis polymerization-derived monolithic strong anion exchangers for the separation of 5′-phosphorylated oligodeoxythymidylic acids fragments" @default.
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- W2021218094 doi "https://doi.org/10.1016/j.chroma.2011.03.003" @default.
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