Anion-induced self-assembly of luminescent and magnetic homoleptic cyclic tetranuclear Ln4(Salen)4 and Ln4(Salen) 2 complexes (Ln = Nd, Yb, Er, or Gd)

Weixu Feng; Yao Zhang; Zhao Zhang; Xingqiang Lü; Han Liu; Guoxiang Shi; Dan Zou; Jirong Song; Daidi Fan; Rick W K WONG; Richard A. Jones

doi:10.1021/ic300918c

Anion-induced self-assembly of luminescent and magnetic homoleptic cyclic tetranuclear Ln₄(Salen)₄ and Ln₄(Salen) ₂ complexes (Ln = Nd, Yb, Er, or Gd)

Weixu Feng, Yao Zhang, Zhao Zhang, Xingqiang Lü^*, Han Liu, Guoxiang Shi, Dan Zou, Jirong Song, Daidi Fan, Rick W K WONG, Richard A. Jones

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Journal article › peer-review

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Abstract

Unique homoleptic cyclic tetranuclear Ln₄(Salen)₄ complexes [Ln₄(L)₂(HL)₂(μ₃-OH) ₂Cl₂]·2Cl (Ln = Nd, 1; Ln = Yb, 2; Ln = Er, 3; Ln = Gd, 4) or Ln₄(Salen)₂ complexes [Ln₄(L) ₂(μ₃-OH)₂(OAc)₆] (Ln = Nd, 5; Ln = Yb, 6; Ln = Er, 7; Ln = Gd, 8) have been self-assembled from the reaction of the hexadentate Salen-type Schiff-base ligand H₂L with LnCl ₃·6H₂O or Ln(OAc)₆·6H ₂O (Ln = Nd, Yb, Er, or Gd), respectively (H₂L: N,N′-bis(salicylidene)cyclohexane-1,2-diamine). The result of their photophysical properties shows that the strong and characteristic NIR luminescence for complexes 1-2 and 5-6 with emissive lifetimes in microsecond ranges are observed, and the sensitization arises from the excited state (both ¹LC and ³LC) of the hexadentate Salen-type Schiff-base ligand with the flexible linker. Temperature dependence (1.8-300 K) magnetic susceptibility studies of the eight complexes suggest the presence of an antiferromagnetic interaction between the Ln³⁺ ions.

Original language	English
Pages (from-to)	11377-11386
Number of pages	10
Journal	Inorganic Chemistry
Volume	51
Issue number	21
DOIs	https://doi.org/10.1021/ic300918c
Publication status	Published - 5 Nov 2012

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@article{a2d2093dff73469a8d14481b68933373,

title = "Anion-induced self-assembly of luminescent and magnetic homoleptic cyclic tetranuclear Ln4(Salen)4 and Ln4(Salen) 2 complexes (Ln = Nd, Yb, Er, or Gd)",

abstract = "Unique homoleptic cyclic tetranuclear Ln4(Salen)4 complexes [Ln4(L)2(HL)2(μ3-OH) 2Cl2]·2Cl (Ln = Nd, 1; Ln = Yb, 2; Ln = Er, 3; Ln = Gd, 4) or Ln4(Salen)2 complexes [Ln4(L) 2(μ3-OH)2(OAc)6] (Ln = Nd, 5; Ln = Yb, 6; Ln = Er, 7; Ln = Gd, 8) have been self-assembled from the reaction of the hexadentate Salen-type Schiff-base ligand H2L with LnCl 3·6H2O or Ln(OAc)6·6H 2O (Ln = Nd, Yb, Er, or Gd), respectively (H2L: N,N′-bis(salicylidene)cyclohexane-1,2-diamine). The result of their photophysical properties shows that the strong and characteristic NIR luminescence for complexes 1-2 and 5-6 with emissive lifetimes in microsecond ranges are observed, and the sensitization arises from the excited state (both 1LC and 3LC) of the hexadentate Salen-type Schiff-base ligand with the flexible linker. Temperature dependence (1.8-300 K) magnetic susceptibility studies of the eight complexes suggest the presence of an antiferromagnetic interaction between the Ln3+ ions.",

author = "Weixu Feng and Yao Zhang and Zhao Zhang and Xingqiang L{\"u} and Han Liu and Guoxiang Shi and Dan Zou and Jirong Song and Daidi Fan and WONG, {Rick W K} and Jones, {Richard A.}",

note = "This work is funded by the National Natural Science Foundation (21173165, 20871098), the Program for New Century Excellent Talents in University from the Ministry of Education of China (NCET-10-0936), the research fund for the Doctoral Program (20116101110003) of Higher Education of China, the State Key Laboratory of Structure Chemistry (20100014), the Education Committee Foundation of Shaanxi Province (11JK0588), Hong Kong Research Grants Council (HKBU 202407 and FRG/06-07/II-16) in P. R. China, the Robert A. Welch Foundation (Grant F-816), the Texas Higher Education Coordinating Board (ARP 003658-0010-2006), and 11385 the Petroleum Research Fund, administered by the American Chemical Society (47014-AC5). ",

year = "2012",

month = nov,

day = "5",

doi = "10.1021/ic300918c",

language = "English",

volume = "51",

pages = "11377--11386",

journal = "Inorganic Chemistry",

issn = "0020-1669",

publisher = "American Chemical Society",

number = "21",

}

TY - JOUR

T1 - Anion-induced self-assembly of luminescent and magnetic homoleptic cyclic tetranuclear Ln4(Salen)4 and Ln4(Salen) 2 complexes (Ln = Nd, Yb, Er, or Gd)

AU - Feng, Weixu

AU - Zhang, Yao

AU - Zhang, Zhao

AU - Lü, Xingqiang

AU - Liu, Han

AU - Shi, Guoxiang

AU - Zou, Dan

AU - Song, Jirong

AU - Fan, Daidi

AU - WONG, Rick W K

AU - Jones, Richard A.

N1 - This work is funded by the National Natural Science Foundation (21173165, 20871098), the Program for New Century Excellent Talents in University from the Ministry of Education of China (NCET-10-0936), the research fund for the Doctoral Program (20116101110003) of Higher Education of China, the State Key Laboratory of Structure Chemistry (20100014), the Education Committee Foundation of Shaanxi Province (11JK0588), Hong Kong Research Grants Council (HKBU 202407 and FRG/06-07/II-16) in P. R. China, the Robert A. Welch Foundation (Grant F-816), the Texas Higher Education Coordinating Board (ARP 003658-0010-2006), and 11385 the Petroleum Research Fund, administered by the American Chemical Society (47014-AC5).

PY - 2012/11/5

Y1 - 2012/11/5

N2 - Unique homoleptic cyclic tetranuclear Ln4(Salen)4 complexes [Ln4(L)2(HL)2(μ3-OH) 2Cl2]·2Cl (Ln = Nd, 1; Ln = Yb, 2; Ln = Er, 3; Ln = Gd, 4) or Ln4(Salen)2 complexes [Ln4(L) 2(μ3-OH)2(OAc)6] (Ln = Nd, 5; Ln = Yb, 6; Ln = Er, 7; Ln = Gd, 8) have been self-assembled from the reaction of the hexadentate Salen-type Schiff-base ligand H2L with LnCl 3·6H2O or Ln(OAc)6·6H 2O (Ln = Nd, Yb, Er, or Gd), respectively (H2L: N,N′-bis(salicylidene)cyclohexane-1,2-diamine). The result of their photophysical properties shows that the strong and characteristic NIR luminescence for complexes 1-2 and 5-6 with emissive lifetimes in microsecond ranges are observed, and the sensitization arises from the excited state (both 1LC and 3LC) of the hexadentate Salen-type Schiff-base ligand with the flexible linker. Temperature dependence (1.8-300 K) magnetic susceptibility studies of the eight complexes suggest the presence of an antiferromagnetic interaction between the Ln3+ ions.

AB - Unique homoleptic cyclic tetranuclear Ln4(Salen)4 complexes [Ln4(L)2(HL)2(μ3-OH) 2Cl2]·2Cl (Ln = Nd, 1; Ln = Yb, 2; Ln = Er, 3; Ln = Gd, 4) or Ln4(Salen)2 complexes [Ln4(L) 2(μ3-OH)2(OAc)6] (Ln = Nd, 5; Ln = Yb, 6; Ln = Er, 7; Ln = Gd, 8) have been self-assembled from the reaction of the hexadentate Salen-type Schiff-base ligand H2L with LnCl 3·6H2O or Ln(OAc)6·6H 2O (Ln = Nd, Yb, Er, or Gd), respectively (H2L: N,N′-bis(salicylidene)cyclohexane-1,2-diamine). The result of their photophysical properties shows that the strong and characteristic NIR luminescence for complexes 1-2 and 5-6 with emissive lifetimes in microsecond ranges are observed, and the sensitization arises from the excited state (both 1LC and 3LC) of the hexadentate Salen-type Schiff-base ligand with the flexible linker. Temperature dependence (1.8-300 K) magnetic susceptibility studies of the eight complexes suggest the presence of an antiferromagnetic interaction between the Ln3+ ions.

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U2 - 10.1021/ic300918c

DO - 10.1021/ic300918c

M3 - Journal article

C2 - 23043380

AN - SCOPUS:84868340900

SN - 0020-1669

VL - 51

SP - 11377

EP - 11386

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 21

ER -

Anion-induced self-assembly of luminescent and magnetic homoleptic cyclic tetranuclear Ln₄(Salen)₄ and Ln₄(Salen) ₂ complexes (Ln = Nd, Yb, Er, or Gd)

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