Formation of a layered framework structure based upon 4-methyl-2,6- bis(methylphosphonic acid) phenol

Xin Min Gan, Iris Binyamin, Sylvie Pailloux, Eileen N. Duesler, Robert T. Paine

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The trifunctional ligands, (HO)2P(O)CH2 2C6H2(R)OH, (5-H4) (R = CH 3, Br) were prepared in good yield via an Arbusov reaction between P(OEt)3 and the respective 4-R-2,6-bis(chloromethyl)phenols followed by acidic aqueous hydrolysis and they were spectroscopically characterized by IR and NMR techniques. The ligand 5-H4-CH3 readily dissolves lanthanide hydroxide residues and it forms a crystalline complex from aqueous LaCl3 solutions. This complex was characterized by single crystal X-ray diffraction methods and found to adopt a complex 2-D lamellar network in the bc plane. The La(iii) inner coordination sphere is seven coordinate formed by oxygen atoms from two water molecules and five phosphonate oxygen atoms from three different ligands. The phenolic oxygen atom is not involved in the ligand binding to La(iii).

Original languageEnglish (US)
Pages (from-to)3912-3917
Number of pages6
JournalDalton Transactions
Issue number32
DOIs
StatePublished - Aug 16 2006

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