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. Author manuscript; available in PMC: 2014 Mar 15.
Published in final edited form as: Microporous Mesoporous Mater. 2013 Mar 15;169:222–234. doi: 10.1016/j.micromeso.2012.11.009

Fig. 2.

Fig. 2

1H- and 31P NMR spectra of the phosphonic diesters 9 precursors of diacids 5 (see Scheme 2).