Exploration of SMM behavior of Ln2 complexes derived from thianaphthene-2-carboxylic acid

Soumava Biswas; Leena Mandal; Yongbing Shen; Masahiro Yamashita

doi:10.1039/c9dt01984g

Exploration of SMM behavior of Ln₂ complexes derived from thianaphthene-2-carboxylic acid

Soumava Biswas, Leena Mandal, Yongbing Shen, Masahiro Yamashita

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

Two lanthanide-based dinuclear complexes [Ln^III(L)₃(DMF)(H₂O)]₂ (Ln = Dy^III (1)/Tb^III (2)) derived from thianaphthene-2-carboxylic acid have been synthesized and characterized in detail. Single-crystal XRD analyses confirm that the centro-symmetric discrete dimeric structures contain eight-coordinated lanthanide centers with biaugmented trigonal prism geometry in the complexes. Magnetic studies reveal the presence of antiferromagnetic interaction as well as thermal depopulation of Stark sublevels with a decrease in temperature for both complexes, whereas prominent field-induced single-molecule magnet behavior was observed for 1. Also, an isostructural yttrium-based complex (3) and a magnetically dilute sample of complex 1 (1′) have been prepared for magnetic dilution study. 1′ shows a combination of Orbach and Raman relaxation processes with effective energy barrier ΔE = 19.508 cm^-1 and relaxation time τ_o = 9.710 × 10^-10 s.

Original language	English
Pages (from-to)	14096-14102
Number of pages	7
Journal	Dalton Transactions
Volume	48
Issue number	37
DOIs	https://doi.org/10.1039/c9dt01984g
Publication status	Published - 2019

ASJC Scopus subject areas

Inorganic Chemistry

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title = "Exploration of SMM behavior of Ln2 complexes derived from thianaphthene-2-carboxylic acid",

abstract = "Two lanthanide-based dinuclear complexes [LnIII(L)3(DMF)(H2O)]2 (Ln = DyIII (1)/TbIII (2)) derived from thianaphthene-2-carboxylic acid have been synthesized and characterized in detail. Single-crystal XRD analyses confirm that the centro-symmetric discrete dimeric structures contain eight-coordinated lanthanide centers with biaugmented trigonal prism geometry in the complexes. Magnetic studies reveal the presence of antiferromagnetic interaction as well as thermal depopulation of Stark sublevels with a decrease in temperature for both complexes, whereas prominent field-induced single-molecule magnet behavior was observed for 1. Also, an isostructural yttrium-based complex (3) and a magnetically dilute sample of complex 1 (1′) have been prepared for magnetic dilution study. 1′ shows a combination of Orbach and Raman relaxation processes with effective energy barrier ΔE = 19.508 cm-1 and relaxation time τo = 9.710 × 10-10 s.",

author = "Soumava Biswas and Leena Mandal and Yongbing Shen and Masahiro Yamashita",

note = "Funding Information: This work was partially supported by CREST (JPMJCR12L3), JST. M. Y. is grateful for the support of 111 project (B18030) from China. S. B. thanks the JSPS (P17038) for financial support Publisher Copyright: {\textcopyright} 2019 The Royal Society of Chemistry.",

year = "2019",

doi = "10.1039/c9dt01984g",

language = "English",

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AU - Biswas, Soumava

AU - Mandal, Leena

AU - Shen, Yongbing

AU - Yamashita, Masahiro

N1 - Funding Information: This work was partially supported by CREST (JPMJCR12L3), JST. M. Y. is grateful for the support of 111 project (B18030) from China. S. B. thanks the JSPS (P17038) for financial support Publisher Copyright: © 2019 The Royal Society of Chemistry.

PY - 2019

Y1 - 2019

N2 - Two lanthanide-based dinuclear complexes [LnIII(L)3(DMF)(H2O)]2 (Ln = DyIII (1)/TbIII (2)) derived from thianaphthene-2-carboxylic acid have been synthesized and characterized in detail. Single-crystal XRD analyses confirm that the centro-symmetric discrete dimeric structures contain eight-coordinated lanthanide centers with biaugmented trigonal prism geometry in the complexes. Magnetic studies reveal the presence of antiferromagnetic interaction as well as thermal depopulation of Stark sublevels with a decrease in temperature for both complexes, whereas prominent field-induced single-molecule magnet behavior was observed for 1. Also, an isostructural yttrium-based complex (3) and a magnetically dilute sample of complex 1 (1′) have been prepared for magnetic dilution study. 1′ shows a combination of Orbach and Raman relaxation processes with effective energy barrier ΔE = 19.508 cm-1 and relaxation time τo = 9.710 × 10-10 s.

AB - Two lanthanide-based dinuclear complexes [LnIII(L)3(DMF)(H2O)]2 (Ln = DyIII (1)/TbIII (2)) derived from thianaphthene-2-carboxylic acid have been synthesized and characterized in detail. Single-crystal XRD analyses confirm that the centro-symmetric discrete dimeric structures contain eight-coordinated lanthanide centers with biaugmented trigonal prism geometry in the complexes. Magnetic studies reveal the presence of antiferromagnetic interaction as well as thermal depopulation of Stark sublevels with a decrease in temperature for both complexes, whereas prominent field-induced single-molecule magnet behavior was observed for 1. Also, an isostructural yttrium-based complex (3) and a magnetically dilute sample of complex 1 (1′) have been prepared for magnetic dilution study. 1′ shows a combination of Orbach and Raman relaxation processes with effective energy barrier ΔE = 19.508 cm-1 and relaxation time τo = 9.710 × 10-10 s.

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Exploration of SMM behavior of Ln₂ complexes derived from thianaphthene-2-carboxylic acid

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