Synthesis, Crystal Structure, and Magnetic Properties of a New Cobalt(II) Polymer Based on 4-Bromoisophthalic acid and 1,2-bi(4-pyridyl)ethane

摘要

A new cobalt(II) coordination polymer, [Co₂(bpa)₂(Brip)₂]_n (H₂Brip = 4-bromoisophthalic acid, bpa = 1,2-bi(4-pyridyl)ethane), has been synthesized through hydrothermal reaction. It was characterized by elemental analysis, IR spectra, thermogravimetric analysis, magnetic properties, and X-ray single-crystal diffraction. It crystallizes in the monoclinic space group P2₁/c with a = 10.2166(16), b = 13.647(2), c = 13.593(2) ? , ?2 = 105.244(2)?°, V = 1828.5(5) ? 3, C₄₀H₃₀Br₂Co₂N₄O₈, M_r = 972.36, Z = 2, D_c = 1.766? g/cm3, ??((MoK?±) = 3.154? mma??1, F(000) = 972, the R = 0.0479, and wR = 0.1251 for 3405 observed reflections with I > 2??(I). The adjacent Co ions are bridged by Brip to form a 1D chain. The 1D chains are further connected by bpa to generate a 2D network. Variable-temperature magnetic susceptibility measurements indicate the occurrence of weak ferromagnetic properties between adjacent Co ions.View full textDownload full textKeywordscobalt(II) complex, 4-bromoisophthalic acid, magnetic properties, 1, 2-bi(4-pyridyl)ethaneRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/15533174.2012.680134