Tuning chain topologies and magnetic anisotropy in one-dimensional cobalt(ii) coordination polymers via distinct dicarboxylates

Tian, Zhengfang and Moorthy, Shruti and Xiang, Huan and Singh, Saurabh Kumar and et al, . (2022) Tuning chain topologies and magnetic anisotropy in one-dimensional cobalt(ii) coordination polymers via distinct dicarboxylates. CrystEngComm, 24 (21). pp. 3928-3937. ISSN 1466-8033

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Based on a terpyridine derivative and two different dicarboxylate ligands, two new cobalt(ii) coordination polymers, namely [Co(pytpy)(DClbdc)]n (1) and [Co(pytpy)(ndc)]n (2) (pytpy = 4′-(4-pyridyl)-2,2′:6′,2′′-terpyridine, H2DClbc = 2,5-dichloroterephthalic acid, and H2ndc = 2,6-naphthalenedicarboxylic acid), were hydrothermally synthesized and characterized structurally and magnetically. Single-crystal X-ray diffraction revealed that 1 and 2 are one-dimensional (1D) linear and zigzag chain complexes, respectively, with the Co2+ centers located in a compressed and an elongated bipyramid of 1 and 2, respectively. Magnetic investigation revealed that the chain complexes exhibit distinct easy-axis and easy-plane magnetic anisotropy with D = −95.6 and −42.8 cm−1 for 1 and 2, respectively. The inverse magnetic anisotropy of 1 and 2 was further confirmed and understood using ab initio calculations. Interestingly, field-induced single-ion magnet (SIM) behaviors were evidenced at low temperatures with the effective energy barrier of Ueff = 27.3 and 12.7 cm−1 for 1 and 2, respectively. The foregoing results provide not only a way for the construction of 1D cobalt(ii) coordination polymers with slow magnetic relaxation behavior but also a chance to tune chain topologies and magnetic anisotropy in one-dimensional coordination polymers via different dicarboxylates. © 2022 The Royal Society of Chemistry

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IITH Creators:
IITH CreatorsORCiD
Singh, Saurabh Kumarhttps://orcid.org/0000-0001-9488-8036
Item Type: Article
Additional Information: This work was supported by a start-up fund from Huanggang Normal University (No. 2042021033), the NSFC (No. 21901152), and the Open Foundation of State Key Laboratory of Coordination Chemistry (No. SKLCC2208). SKS acknowledges the Department of Science and Technology for the Start-up Research Grant (SRG/2020/001323) and IIT Hyderabad for generous funding. The support and resources provided by PARAM Shivay Facility under the National Supercomputing Mission, Government of India, at the Indian Institute of Technology, Varanasi, are gratefully acknowledged.
Uncontrolled Keywords: Chain complexes; Chain topology; Coordination Polymers; Coordination-polymers; Dicarboxylates; Hydrothermally synthesized; One-dimensional; Pyridyl; Terpyridines; X- ray diffractions
Subjects: Chemistry
Divisions: Department of Chemistry
Depositing User: . LibTrainee 2021
Date Deposited: 18 Oct 2022 08:53
Last Modified: 18 Oct 2022 08:53
URI: http://raiith.iith.ac.in/id/eprint/11000
Publisher URL: http://doi.org/10.1039/d2ce00437b
OA policy: https://v2.sherpa.ac.uk/id/publication/18009
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