Structural variations in (CuL) 2 Ln complexes of a series of lanthanide ions with a salen-type unsymmetrical Schiff base(H 2 L): Dy and Tb derivatives as potential single-molecule magnets
A new series of heterometallic trinuclear Cu Ln complexes [lanthanide ions Ln = Gd (1), Tb (2), Dy (3), Ho (4) and Er (5)] has been synthesized using a Cu(ii)-metalloligand derived from a N O donor unsymmetrical Schiff base, H L (where H L = N-α-methylsalicylidene-N'-salicylidene-1,3-propanedia...
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Veröffentlicht in: | Dalton transactions : an international journal of inorganic chemistry 2017-09, Vol.46 (36), p.12095-12105 |
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creator | Mahapatra, Prithwish Ghosh, Soumavo Koizumi, Naoki Kanetomo, Takuya Ishida, Takayuki Drew, Michael G B Ghosh, Ashutosh |
description | A new series of heterometallic trinuclear Cu
Ln complexes [lanthanide ions Ln = Gd (1), Tb (2), Dy (3), Ho (4) and Er (5)] has been synthesized using a Cu(ii)-metalloligand derived from a N
O
donor unsymmetrical Schiff base, H
L (where H
L = N-α-methylsalicylidene-N'-salicylidene-1,3-propanediamine), and structurally characterized. Among these complexes, [(CuL)
Gd(NO
)
(CH
CN)
] (1), [(CuL)
Tb(NO
)
(CH
CN)
] (2) and [(CuL)
Dy(NO
)
(CH
CN)
] (3) are isomorphic and isostructural. In these complexes two metalloligands coordinate to the central Ln(iii) (Ln = Gd, Tb and Dy respectively) ion in a transoid fashion viaμ
-phenoxido oxygen atoms. The Ln(iii) ions are deca-coordinated with a distorted tetradecahedron geometry. The two terminal Cu(ii) ions of the complexes possess a hexa-coordinated distorted octahedral geometry. In contrast, in complexes [(CuL)
Ho(NO
)
(CH
CN)], (4) and [(CuL)
Er(NO
)
(CH
CN)]·0.5(CH
CN) (5), the two metalloligands coordinated to the Ln(iii) ions in a cisoid fashion. The Ho(iii) ion in 4 is nona-coordinated with a distorted tricapped trigonal prismatic geometry and the Er(iii) ion in 5 is octa-coordinated with a distorted square antiprismatic geometry. The two terminal Cu(ii) ions in complexes 4 and 5 are penta-coordinated with a distorted square-pyramidal geometry. The dc magnetic susceptibilities and field dependent magnetization measurement of complex 1 reveal the occurrence of ferromagnetic interactions between Cu(ii) and Gd(iii) ions as well as intermolecular antiferromagnetic interactions. Both complexes 2 and 3 show ferromagnetic interactions between Cu(ii) and Ln(iii) ions. The ac magnetic susceptibilities of all the complexes were also recorded and it was found that only complexes 2 and 3 exhibit slow relaxation of magnetization reorientation below 10 K at 2000 Oe applied dc field, this being characteristic of single molecule magnets. |
doi_str_mv | 10.1039/c7dt02061a |
format | Article |
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Ln complexes [lanthanide ions Ln = Gd (1), Tb (2), Dy (3), Ho (4) and Er (5)] has been synthesized using a Cu(ii)-metalloligand derived from a N
O
donor unsymmetrical Schiff base, H
L (where H
L = N-α-methylsalicylidene-N'-salicylidene-1,3-propanediamine), and structurally characterized. Among these complexes, [(CuL)
Gd(NO
)
(CH
CN)
] (1), [(CuL)
Tb(NO
)
(CH
CN)
] (2) and [(CuL)
Dy(NO
)
(CH
CN)
] (3) are isomorphic and isostructural. In these complexes two metalloligands coordinate to the central Ln(iii) (Ln = Gd, Tb and Dy respectively) ion in a transoid fashion viaμ
-phenoxido oxygen atoms. The Ln(iii) ions are deca-coordinated with a distorted tetradecahedron geometry. The two terminal Cu(ii) ions of the complexes possess a hexa-coordinated distorted octahedral geometry. In contrast, in complexes [(CuL)
Ho(NO
)
(CH
CN)], (4) and [(CuL)
Er(NO
)
(CH
CN)]·0.5(CH
CN) (5), the two metalloligands coordinated to the Ln(iii) ions in a cisoid fashion. The Ho(iii) ion in 4 is nona-coordinated with a distorted tricapped trigonal prismatic geometry and the Er(iii) ion in 5 is octa-coordinated with a distorted square antiprismatic geometry. The two terminal Cu(ii) ions in complexes 4 and 5 are penta-coordinated with a distorted square-pyramidal geometry. The dc magnetic susceptibilities and field dependent magnetization measurement of complex 1 reveal the occurrence of ferromagnetic interactions between Cu(ii) and Gd(iii) ions as well as intermolecular antiferromagnetic interactions. Both complexes 2 and 3 show ferromagnetic interactions between Cu(ii) and Ln(iii) ions. The ac magnetic susceptibilities of all the complexes were also recorded and it was found that only complexes 2 and 3 exhibit slow relaxation of magnetization reorientation below 10 K at 2000 Oe applied dc field, this being characteristic of single molecule magnets.</description><identifier>ISSN: 1477-9226</identifier><identifier>EISSN: 1477-9234</identifier><identifier>DOI: 10.1039/c7dt02061a</identifier><identifier>PMID: 28853756</identifier><language>eng</language><publisher>England</publisher><ispartof>Dalton transactions : an international journal of inorganic chemistry, 2017-09, Vol.46 (36), p.12095-12105</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c996-c9bf989a6f5da70260e8398ed0247cd1874e6e1e6d07aa4ebc3f4c59bd4e5f313</citedby><cites>FETCH-LOGICAL-c996-c9bf989a6f5da70260e8398ed0247cd1874e6e1e6d07aa4ebc3f4c59bd4e5f313</cites><orcidid>0000-0003-2026-7565 ; 0000-0001-9088-2526</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/28853756$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Mahapatra, Prithwish</creatorcontrib><creatorcontrib>Ghosh, Soumavo</creatorcontrib><creatorcontrib>Koizumi, Naoki</creatorcontrib><creatorcontrib>Kanetomo, Takuya</creatorcontrib><creatorcontrib>Ishida, Takayuki</creatorcontrib><creatorcontrib>Drew, Michael G B</creatorcontrib><creatorcontrib>Ghosh, Ashutosh</creatorcontrib><title>Structural variations in (CuL) 2 Ln complexes of a series of lanthanide ions with a salen-type unsymmetrical Schiff base(H 2 L): Dy and Tb derivatives as potential single-molecule magnets</title><title>Dalton transactions : an international journal of inorganic chemistry</title><addtitle>Dalton Trans</addtitle><description>A new series of heterometallic trinuclear Cu
Ln complexes [lanthanide ions Ln = Gd (1), Tb (2), Dy (3), Ho (4) and Er (5)] has been synthesized using a Cu(ii)-metalloligand derived from a N
O
donor unsymmetrical Schiff base, H
L (where H
L = N-α-methylsalicylidene-N'-salicylidene-1,3-propanediamine), and structurally characterized. Among these complexes, [(CuL)
Gd(NO
)
(CH
CN)
] (1), [(CuL)
Tb(NO
)
(CH
CN)
] (2) and [(CuL)
Dy(NO
)
(CH
CN)
] (3) are isomorphic and isostructural. In these complexes two metalloligands coordinate to the central Ln(iii) (Ln = Gd, Tb and Dy respectively) ion in a transoid fashion viaμ
-phenoxido oxygen atoms. The Ln(iii) ions are deca-coordinated with a distorted tetradecahedron geometry. The two terminal Cu(ii) ions of the complexes possess a hexa-coordinated distorted octahedral geometry. In contrast, in complexes [(CuL)
Ho(NO
)
(CH
CN)], (4) and [(CuL)
Er(NO
)
(CH
CN)]·0.5(CH
CN) (5), the two metalloligands coordinated to the Ln(iii) ions in a cisoid fashion. The Ho(iii) ion in 4 is nona-coordinated with a distorted tricapped trigonal prismatic geometry and the Er(iii) ion in 5 is octa-coordinated with a distorted square antiprismatic geometry. The two terminal Cu(ii) ions in complexes 4 and 5 are penta-coordinated with a distorted square-pyramidal geometry. The dc magnetic susceptibilities and field dependent magnetization measurement of complex 1 reveal the occurrence of ferromagnetic interactions between Cu(ii) and Gd(iii) ions as well as intermolecular antiferromagnetic interactions. Both complexes 2 and 3 show ferromagnetic interactions between Cu(ii) and Ln(iii) ions. The ac magnetic susceptibilities of all the complexes were also recorded and it was found that only complexes 2 and 3 exhibit slow relaxation of magnetization reorientation below 10 K at 2000 Oe applied dc field, this being characteristic of single molecule magnets.</description><issn>1477-9226</issn><issn>1477-9234</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNo9kc9u2zAMxoVhw9J1u-wBCh6bAt5k-Y_s3YK0awoE2KG5B7REJSps2ZDkdHm2vtycZu2F_A7f9yNBMvY95T9SntU_ldSRC16m-IFdpLmUSS2y_OO7FuWMfQnhiXMheCE-s5moqiKTRXnBXh6jH1UcPbZwQG8x2t4FsA6ul-N6DgLWDlTfDS39pQC9AYRA3p51iy7u0VlN8Bp7tnF_MmBLLonHgWB04dh1FL1V04RHtbfGQIOBrlcn9vwX3B4BnYZNA3riHqYFDhMcAwx9JBftFAvW7VpKur4lNbYEHe4cxfCVfTLYBvr2v1-yze-7zXKVrP_cPywX60TVdTmVxtRVjaUpNEouSk5VVlekucil0mklcyoppVJziZhTozKTq6JudE6FydLskt2cscr3IXgy28HbDv1xm_Lt6QHbpbzdvD5gMZmvzuZhbDrS79a3i2f_AKuDg6M</recordid><startdate>20170928</startdate><enddate>20170928</enddate><creator>Mahapatra, Prithwish</creator><creator>Ghosh, Soumavo</creator><creator>Koizumi, Naoki</creator><creator>Kanetomo, Takuya</creator><creator>Ishida, Takayuki</creator><creator>Drew, Michael G B</creator><creator>Ghosh, Ashutosh</creator><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0003-2026-7565</orcidid><orcidid>https://orcid.org/0000-0001-9088-2526</orcidid></search><sort><creationdate>20170928</creationdate><title>Structural variations in (CuL) 2 Ln complexes of a series of lanthanide ions with a salen-type unsymmetrical Schiff base(H 2 L): Dy and Tb derivatives as potential single-molecule magnets</title><author>Mahapatra, Prithwish ; Ghosh, Soumavo ; Koizumi, Naoki ; Kanetomo, Takuya ; Ishida, Takayuki ; Drew, Michael G B ; Ghosh, Ashutosh</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c996-c9bf989a6f5da70260e8398ed0247cd1874e6e1e6d07aa4ebc3f4c59bd4e5f313</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mahapatra, Prithwish</creatorcontrib><creatorcontrib>Ghosh, Soumavo</creatorcontrib><creatorcontrib>Koizumi, Naoki</creatorcontrib><creatorcontrib>Kanetomo, Takuya</creatorcontrib><creatorcontrib>Ishida, Takayuki</creatorcontrib><creatorcontrib>Drew, Michael G B</creatorcontrib><creatorcontrib>Ghosh, Ashutosh</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><jtitle>Dalton transactions : an international journal of inorganic chemistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mahapatra, Prithwish</au><au>Ghosh, Soumavo</au><au>Koizumi, Naoki</au><au>Kanetomo, Takuya</au><au>Ishida, Takayuki</au><au>Drew, Michael G B</au><au>Ghosh, Ashutosh</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Structural variations in (CuL) 2 Ln complexes of a series of lanthanide ions with a salen-type unsymmetrical Schiff base(H 2 L): Dy and Tb derivatives as potential single-molecule magnets</atitle><jtitle>Dalton transactions : an international journal of inorganic chemistry</jtitle><addtitle>Dalton Trans</addtitle><date>2017-09-28</date><risdate>2017</risdate><volume>46</volume><issue>36</issue><spage>12095</spage><epage>12105</epage><pages>12095-12105</pages><issn>1477-9226</issn><eissn>1477-9234</eissn><abstract>A new series of heterometallic trinuclear Cu
Ln complexes [lanthanide ions Ln = Gd (1), Tb (2), Dy (3), Ho (4) and Er (5)] has been synthesized using a Cu(ii)-metalloligand derived from a N
O
donor unsymmetrical Schiff base, H
L (where H
L = N-α-methylsalicylidene-N'-salicylidene-1,3-propanediamine), and structurally characterized. Among these complexes, [(CuL)
Gd(NO
)
(CH
CN)
] (1), [(CuL)
Tb(NO
)
(CH
CN)
] (2) and [(CuL)
Dy(NO
)
(CH
CN)
] (3) are isomorphic and isostructural. In these complexes two metalloligands coordinate to the central Ln(iii) (Ln = Gd, Tb and Dy respectively) ion in a transoid fashion viaμ
-phenoxido oxygen atoms. The Ln(iii) ions are deca-coordinated with a distorted tetradecahedron geometry. The two terminal Cu(ii) ions of the complexes possess a hexa-coordinated distorted octahedral geometry. In contrast, in complexes [(CuL)
Ho(NO
)
(CH
CN)], (4) and [(CuL)
Er(NO
)
(CH
CN)]·0.5(CH
CN) (5), the two metalloligands coordinated to the Ln(iii) ions in a cisoid fashion. The Ho(iii) ion in 4 is nona-coordinated with a distorted tricapped trigonal prismatic geometry and the Er(iii) ion in 5 is octa-coordinated with a distorted square antiprismatic geometry. The two terminal Cu(ii) ions in complexes 4 and 5 are penta-coordinated with a distorted square-pyramidal geometry. The dc magnetic susceptibilities and field dependent magnetization measurement of complex 1 reveal the occurrence of ferromagnetic interactions between Cu(ii) and Gd(iii) ions as well as intermolecular antiferromagnetic interactions. Both complexes 2 and 3 show ferromagnetic interactions between Cu(ii) and Ln(iii) ions. The ac magnetic susceptibilities of all the complexes were also recorded and it was found that only complexes 2 and 3 exhibit slow relaxation of magnetization reorientation below 10 K at 2000 Oe applied dc field, this being characteristic of single molecule magnets.</abstract><cop>England</cop><pmid>28853756</pmid><doi>10.1039/c7dt02061a</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0003-2026-7565</orcidid><orcidid>https://orcid.org/0000-0001-9088-2526</orcidid></addata></record> |
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source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
title | Structural variations in (CuL) 2 Ln complexes of a series of lanthanide ions with a salen-type unsymmetrical Schiff base(H 2 L): Dy and Tb derivatives as potential single-molecule magnets |
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