Assembly and Crystal Structure of a 2D lead(II) Coordination Polymer with 1D Metal–Oxygen Chains

Abstract

A new lead coordination polymer [Pb₂(mip)₂] (1) has been synthesized under the intervention of polycarboxylic acid by hydrothermal method (H₂mip = 5-methylisophthalic acid). X-ray single-crystal structure determination reveals that the polymer crystallizes in monoclinic C2/c space group: a = 21.118(2) Å, b = 8.0055(7) Å, c = 25.556(3) Å, and β = 111.1730(10)°. The Pb(II) cations are connected by four mip anions to produce a 2D (6,3) double-layered framework. It should be noted that four-membered rings by two Pb atoms with two μ-O atoms of mip groups link each other to form a one-dimensional Pb–O chain through a corner-sharing Pb center.

Keywords:

• Coordination polymer
• double-layered framework
• lead(II)
• 5-methylisophthalic acid
• metal–oxygen chain

Acknowledgments

This work was supported by the Natural Science Research Project of Colleges and Universities of Anhui Province (Grant Nos. KJ2010B202 and KJ2011Z338), Anhui Provincial Natural Science Foundation and Scientific Research Start-up Fund of Huainan Normal University.