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Journal of Coordination Chemistry Volume 66, 2013 - Issue 17
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Articles

Seven-, eight-, and ten-coordinated cerium(III) with highly connective pyridine-2,4,6-tricarboxylate, oxalate, and glycine ligands

Islam Ullah Khan Department of Chemistry, Materials Chemistry Laboratory, GC University, Lahore, PakistanCorrespondence[email protected]
,
Shahzad Sharif Department of Chemistry, Materials Chemistry Laboratory, GC University, Lahore, PakistanCorrespondence[email protected]
&
Onur Sahin Scientific and Technological Research Application and Research Center, Sinop University, Sinop, Turkey
Pages 3113-3125 | Received 12 Jul 2012, Accepted 02 Jul 2013, Published online: 14 Aug 2013
 
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Abstract

Two new 3-D Ce(III) coordination polymers, [Ce1.3(PTA)2(Oxa)2(Gly)(H2O)2]·(Gly)4H2O (1) and [Ce2.6(PTA)4(Oxa)2(H2O)10]·(MeOH)7H2O (2) (PTA = 2,4,6-pyridinetricarboxylate, oxa = oxalate and Gly = glycine), were synthesized. The oxalate in 1 and 2, generated in situ from the cleavage and chemical rearrangement of PTAH3, assembled into mixed-ligand networks to generate 3-D frameworks. Single crystal analysis reveals that in both complexes, Ce(III) shows coordination numbers of 7 and 10 in 1 and 8 and 10 in 2. PTA adopts four kinds of coordination modes. These complexes were further characterized using elemental analysis, FTIR spectroscopy and thermogravimetric analysis.

Acknowledgment

We gratefully acknowledge the Higher Education Commission, Islamabad, Pakistan for its financial support under its Indigenous PhD Program batch (VI).

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