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Ghodrat Mahmoudi

Ghodrat Mahmoudi

Academic rank: Associate Professor
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Education: PhD.
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Research

Title
Two manganese(II) coordination polymers driven by (iso)nicotinoyl-hydrazone blocks and pseudohalide ancillary ligands: syntheses, structural features, and magnetic properties
Type
JournalPaper
Keywords
Manganese; coordination polymers; crystal engineering; topology; magnetic properties
Year
2017
Journal JOURNAL OF COORDINATION CHEMISTRY
DOI
Researchers Ghodrat Mahmoudi ، Habibar Chowdhury ، Samuel Lofland ، Barindra Kumar Ghosh ، Alexander M. Kirillov

Abstract

AbstractTwo coordination polymers, [Mn2(?-L1)2(?-N3)2]n (1) and [Mn(?-HL2)(SCN)2]n (2), were assembled in a single-pot from MnCl2·4H2O, HL1 (2-acetylpyridine isonicotinoylhydrazone) or HL2 (2-acetylpyridine nicotinoylhydrazone) and ancillary ligand sources (NaN3 or NH4NCS). The products were fully characterized, including by single-crystal X-ray diffraction, which revealed a 2-D metal?organic layer in 1 and a 1-D zigzag coordination chain in 2. Both 1 and 2 are constructed from six-coordinate Mn(II) nodes that adopt distorted octahedral (MnN5O) environments; the adjacent nodes are driven by the ?-L1 and ?-N3 linkers in 1 or ?-HL2 linkers in 2 to form different metal?organic networks. Their topological classification was performed, disclosing the hcb and 2C1 topology in 1 and 2, respectively. Different weak non-covalent interactions promote dimensionality extension. Variable-temperature magnetic susceptibility measurements were carried out, revealing weak ferromagnetic and antiferromagnetic interactions in 1 and 2, respectively.