Investigation of structural, spectral and thermal properties of one-dimensional polymer containing pyromellitic acid and isonicotinamide

Aycan T., Öztürk F., Pasaoglu H.

JOURNAL OF MOLECULAR STRUCTURE, cilt.1176, ss.685-694, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 1176
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.molstruc.2018.08.109
  • Dergi Adı: JOURNAL OF MOLECULAR STRUCTURE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.685-694
  • Anahtar Kelimeler: Pyromellitic acid, Single crystal X-ray diffraction, Spectroscopic methods, Coordination polymer, METAL-ORGANIC FRAMEWORKS, NONLINEAR-OPTICAL PROPERTIES, SPIN-RESONANCE-SPECTRA, COORDINATION POLYMERS, CRYSTAL-STRUCTURES, PHOTOLUMINESCENCE PROPERTIES, ELECTRONIC-PROPERTIES, COPPER(II) COMPLEXES, LIGANDS, STEREOCHEMISTRY
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

The coordination polymer with mixed ligand [Cu-2(H2O)(2) (pm) (ina)(2)](n)center dot 3nH(2)O (pm = tetraanion of pyromellitic acid, ina = isonicotinamide) was studied mostly on its supramolecular architecture. Single crystals were synthesized and structural properties of the 1D polymer were characterized by Single Crystal X-ray diffraction (SCXRD), different spectroscopic methods (Infrared (IR) spectroscopy, UV-Vis spectroscopy and EPR spectroscopy), Thermal and Elemental analysis. It has been observed that complex has crystallized in the monoclinic space group P2(1)/c. The geometric environment of Cu(II) ion is five-coordinated in slightly distorted square pyramidal geometry and tau value have found 0.13. The pyromellitate ligands connecting the metal centers act as bridge and form 1D polymer chains of 2,4 ribbon type [1]. The ladder-like polymer is connected by O-H center dot center dot center dot O and N-H center dot center dot center dot O hydrogen bonds to form supramolecular building. This complex consists of a 3D polymeric structure with containing planar hexacyclic and dimeric water rings. It was mainly focused on the characteristic (COO)(as) and (COO)(s) stretching vibrations of pyromellitate anion in the FT-IR investigation of the complex. (C) 2018 Elsevier B.V. All rights reserved.