Synthesis and crystal structure of a new three-dimensional Ho(II) coordination polymer based on 5′-(4-Carboxyphenyl)-[1,1′:3′,1′′-terphenyl]-4,4′′-dicarboxylic acid

ABSTRACT

A new Ho(II) polymer [Ho(ctdc)]_n 1 (H₃ctdc = 5′-(4-Carboxyphenyl)-[1,1′:3′,1′′-terphenyl]-4,4′′-dicarboxylic acid) was synthesized under hydrothermal conditions. The compound crystallizes in the Monoclinic system, space groupP2(1)/c with a = 17.5782(4), b = 28.6807(5), c = 9.5889(2)Å, α = 90, β = 101.956(2), γ = 90°, V = 4729.44(16) ų, Z = 4, M_r = 618.34, D_c = 0.868 Mg/m³, μ = 3.321 mm⁻¹, F(000) = 1208, the final R = 0.0723 and wR = 0.2343 for 5974 observed reflections with I > 2σ(I). The compound presents a three-dimensional (3 D) network extended by both ctdc³⁻ anions in which the ctdc³⁻ anions employ a chelating coordination mode. From the topology point of view, the structure could be described as a 6-connected 3 D network with (4⁶. 6⁴) topology net. Infrared spectroscopy, elemental analyses, thermogravimetric analysis and powder X-ray diffraction properties of 1 are also investigated.

KEYWORDS:

• 5′-(4-Carboxyphenyl)-[1,1′:3′,1′′-terphenyl]-4,4′′-dicarboxylic acid
• synthesis
• crystal structure

Acknowledgments

This work was supported by the Institutions of higher learning key scientific research project of Henan Province (18B150015) and the Natural Science Foundation of Henan Province (182102310863).