%A MEI Hong-xin;LI Guang-man;DENG Song;SUN Yan-qiong*;CHEN Yi-ping;ZHANG Han-hui*
%T Structural and Spectral Study of a Novel Lanthanide 2-hydroxynicotinic Acid Coordination Polymer
%0 Journal Article
%D 2012
%J SPECTROSCOPY AND SPECTRAL ANALYSIS
%R 10.3964/j.issn.1000-0593(2012)01-0166-05
%P 166-170
%V 32
%N 01
%U {https://www.gpxygpfx.com/CN/abstract/article_5336.shtml}
%8 2012-01-01
%X A novel lanthanide 2-hydroxynicotinic acid coordination polymer 1 {[LaL(HL)(H2O)3]1/3(SO4)2/3(H3O)2H2O}(H2L=2-hydroxynicotinic acid) has been synthesized under hydrothermal condition and characterized by crystal X-ray diffraction, IR, UV, TGA, two-dimensional infrared (2D IR) correlation spectroscopy with magnetic and thermal perturbation. In 1,La ions are connected by 2-hydroxynicotinic acid through both carboxylate oxygen atoms and oxygen atoms from hydroxyl group in pyridine to generate a 2D layer in the ab plane, these layers are further connected by weak interactions to form a 3D framework along c axis. The response of out-of-plane bending vibrations of N—H and C—H are remarkable in the 2D IR correlation spectra under magnetic perturbation, this may attributes to the inducement of π-electron cloud deformation under magnetic perturbation, ν4 vibrations from SO2-4 was also sensitive to magnetic perturbation. In addition, stretching vibrations from N—H are sensitive to thermal perturbation.