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 › 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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Physical and Theoretical Chemistry
Inorganic Chemistry

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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.}",

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.

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.

UR - http://www.scopus.com/inward/record.url?scp=84868340900&partnerID=8YFLogxK

U2 - 10.1021/ic300918c

DO - 10.1021/ic300918c

M3 - Article

C2 - 23043380

AN - SCOPUS:84868340900

VL - 51

SP - 11377

EP - 11386

JO - Inorganic Chemistry

JF - Inorganic Chemistry

SN - 0020-1669

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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