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Temperature-Induced Single-Crystal-to-Single-Crystal Transformations with Consequential Changes in the Magnetic Properties of Fe(III) Complexes.


ABSTRACT: The present article deals with an one-to-one structure-property correspondence of a dinuclear iron complex, [Dipic(H2O)FeOH]2·H2O (1) (Dipic = pyridine-2,6-dicarboxylic acid). Variable-temperature X-ray single-crystal structural analysis confirms a phase transition of complex 1 to complex 2 ([Dipic(H2O)FeOH]2) at 120 °C. Further, single-crystal-to-single-crystal (SCSC) transformation was monitored by temperature-dependent single crystal X-ray diffraction, powder X-ray diffraction, time-dependent Fourier-transform infrared spectroscopy, and differential scanning calorimetry. SCSC transformation brings the change in space group of single crystal. Complex 1 crystallizes in the C2/c space group, whereas complex 2 crystallizes in the Pi? space group. SCSC transformation brings the change in packing diagram as well. Complex 1 shows two-dimensional network through H-bonding, whereas the packing diagram of complex 2 shows a zigzag-like arrangement. Phase transformation not only fetches structural changes but also in the magnetic properties. Difference in Fe-O-Fe bond angles of two complexes creates notable variation in their antiferromagnetic interactions with adjacent metal centers.

SUBMITTER: Adhikary A 

PROVIDER: S-EPMC6648738 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature

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Temperature-Induced Single-Crystal-to-Single-Crystal Transformations with Consequential Changes in the Magnetic Properties of Fe(III) Complexes.

Adhikary Amit A   Akhtar Sohel S   Pariyar Anand A   Batsanov Andrei S AS   Mondal Raju R  

ACS omega 20190522 5


The present article deals with an one-to-one structure-property correspondence of a dinuclear iron complex, [Dipic(H<sub>2</sub>O)FeOH]<sub>2</sub>·H<sub>2</sub>O (<b>1</b>) (Dipic = pyridine-2,6-dicarboxylic acid). Variable-temperature X-ray single-crystal structural analysis confirms a phase transition of complex <b>1</b> to complex <b>2</b> ([Dipic(H<sub>2</sub>O)FeOH]<sub>2</sub>) at 120 °C. Further, single-crystal-to-single-crystal (SCSC) transformation was monitored by temperature-dependen  ...[more]

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