Hydrothermal Synthesis and Crystal Structure of 3D Hydrogen Bonded Framework Obtained by Linear Chain: [Ni (pyridine 2,6 dicarboxylic acid)2(K)2]7(H2O)]n, polymer
Deepanjali Pandey
, Shahid S.Narvi , Siddhartha Chaudhari
Hydrothermal Synthesis, Magnetism susceptibility, ferromagnetism
A new 3D MOFs synthesized hydrothermally by reacting alkali metal salt (KCl) and transition metal salt [Ni(CH3COOH)2].4H2O together with 2,6-pydc in water for 2 days at 170◦C. This coordination network is characterized by IR spectroscopy, thermal analysis and single crystal X-ray analysis. The 3D structure is constructed by [NiK2(2,6-pydc)2(H2O)7]n unit in which water molecules also act as ligand. The typical antisymmetric (1630cm-1) and symmetric (1516cm-1) stretching bands of carboxylate ions are also observed in the IR spectrum. In the TGA curve, first major weight loss (21.6%) observed in the temperature of 180-240◦C which is assigned to release of seven molecules of water. The nickel atom has a slightly elongated axially distorted octahedral coordination. In the crystal structure of this polymer, most appealing point is that K+ ion shows two different coordination numbers 6 and 7. K2 adopts 7 and K1 adopts 6 coordination numbers. The carboxylate group of pyridine-2, 6-dicarboxylic group adopts bridging mode µ-2, oxygen atom of carboxylic group bridges two metal Ni2+ and K+ ions. The presence of water molecules and carboxylic groups makes extensive intermolecular hydrogen bonding. The magnetic measurement of this in the temperature range of 2K-300K shows negative value of Ɵ indicating antiferromagnetic character at very low temperature. The distance between two Ni2+ metal in is too large thus very less magnetic interactions observed.
"Hydrothermal Synthesis and Crystal Structure of 3D Hydrogen Bonded Framework Obtained by Linear Chain: [Ni (pyridine 2,6 dicarboxylic acid)2(K)2]7(H2O)]n, polymer", IJSDR - International Journal of Scientific Development and Research (www.IJSDR.org), ISSN:2455-2631, Vol.2, Issue 9, page no.164 - 175, September-2017, Available :https://ijsdr.org/papers/IJSDR1709028.pdf
Volume 2
Issue 9,
September-2017
Pages : 164 - 175
Paper Reg. ID: IJSDR_170768
Published Paper Id: IJSDR1709028
Downloads: 000347048
Research Area: Chemistry
Country: Allahabad, U.P., India
ISSN: 2455-2631 | IMPACT FACTOR: 9.15 Calculated By Google Scholar | ESTD YEAR: 2016
An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 9.15 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator
Publisher: IJSDR(IJ Publication) Janvi Wave
