Synthesis, crystal structures, and photophysical properties of lanthanide complexes containing pyrrole-derivatized carboxylate ligands

Ga-Lai Law; Ka-Leung Wong; Kok-Kin Lau; Hoi-Lam Tam; Kok-Wai Cheah; Wing-Tak Wong

doi:10.1002/ejic.200700584

Synthesis, crystal structures, and photophysical properties of lanthanide complexes containing pyrrole-derivatized carboxylate ligands

Ga-Lai Law, Ka-Leung Wong, Kok-Kin Lau, Hoi-Lam Tam, Kok-Wai Cheah, Wing-Tak Wong

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

27 Citations (Scopus)

Abstract

Two pyrrole-deriviatized carboxylic acids [L1 = 1-methylpyrrole-2-carboxylate] and [L2 = N-methyl-3-indoleglyoxylate] were used as ligands to prepare six lanthanide coordination compounds [(L 1)3Ln]n (Ln = Eu, 1; Gd, 2; Tb, 3) and [(L 2)n-Ln(NO3)(MeOH)2]n (Ln = Eu, 4; Gd, 5; Tb, 6). These complexes have been synthesized and structurally characterized by single-crystal X-ray diffraction. The phosphorescence behavior of the ligands in the Gd3+ complexes show that modification of the ligands can tune the triplet energy levels of the ligands so that they match the 5D0 energy level of Eu3+ and the 5D4 energy level of Tb3+; thus, the energy transfer efficiency from antenna to Eu3+ and Tb3+ is improved, and the Eu3+ and Tb3+ emission intensity is enhanced. This concept can be applied towards improving the luminescent properties of Ln3+ complexes by the modification of coordinating ligands. © Wiley-VCH Verlag GmbH & Co. KGaA, 2007.

Original language	English
Pages (from-to)	5419-5425
Journal	European Journal of Inorganic Chemistry
Issue number	34
DOIs	https://doi.org/10.1002/ejic.200700584
Publication status	Published - 2007

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

The authors acknowledge the financial support of the Hong Kong Research Grants Council, City University of Hong Kong and the University of Hong Kong. G. L. L. acknowledges the receipt of a postgraduate studentship administered by the University of Hong Kong, and K. L. W. acknowledges the Research Scholarship Enhancement Scheme of the City University of Hong Kong.

Research Keywords

Europium
Lanthanide
Luminescence
Pyrrole
Terbium

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RGC-funded

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title = "Synthesis, crystal structures, and photophysical properties of lanthanide complexes containing pyrrole-derivatized carboxylate ligands",

abstract = "Two pyrrole-deriviatized carboxylic acids [L1 = 1-methylpyrrole-2-carboxylate] and [L2 = N-methyl-3-indoleglyoxylate] were used as ligands to prepare six lanthanide coordination compounds [(L 1)3Ln]n (Ln = Eu, 1; Gd, 2; Tb, 3) and [(L 2)n-Ln(NO3)(MeOH)2]n (Ln = Eu, 4; Gd, 5; Tb, 6). These complexes have been synthesized and structurally characterized by single-crystal X-ray diffraction. The phosphorescence behavior of the ligands in the Gd3+ complexes show that modification of the ligands can tune the triplet energy levels of the ligands so that they match the 5D0 energy level of Eu3+ and the 5D4 energy level of Tb3+; thus, the energy transfer efficiency from antenna to Eu3+ and Tb3+ is improved, and the Eu3+ and Tb3+ emission intensity is enhanced. This concept can be applied towards improving the luminescent properties of Ln3+ complexes by the modification of coordinating ligands. {\textcopyright} Wiley-VCH Verlag GmbH & Co. KGaA, 2007.",

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T1 - Synthesis, crystal structures, and photophysical properties of lanthanide complexes containing pyrrole-derivatized carboxylate ligands

AU - Law, Ga-Lai

AU - Wong, Ka-Leung

AU - Lau, Kok-Kin

AU - Tam, Hoi-Lam

AU - Cheah, Kok-Wai

AU - Wong, Wing-Tak

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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N2 - Two pyrrole-deriviatized carboxylic acids [L1 = 1-methylpyrrole-2-carboxylate] and [L2 = N-methyl-3-indoleglyoxylate] were used as ligands to prepare six lanthanide coordination compounds [(L 1)3Ln]n (Ln = Eu, 1; Gd, 2; Tb, 3) and [(L 2)n-Ln(NO3)(MeOH)2]n (Ln = Eu, 4; Gd, 5; Tb, 6). These complexes have been synthesized and structurally characterized by single-crystal X-ray diffraction. The phosphorescence behavior of the ligands in the Gd3+ complexes show that modification of the ligands can tune the triplet energy levels of the ligands so that they match the 5D0 energy level of Eu3+ and the 5D4 energy level of Tb3+; thus, the energy transfer efficiency from antenna to Eu3+ and Tb3+ is improved, and the Eu3+ and Tb3+ emission intensity is enhanced. This concept can be applied towards improving the luminescent properties of Ln3+ complexes by the modification of coordinating ligands. © Wiley-VCH Verlag GmbH & Co. KGaA, 2007.

AB - Two pyrrole-deriviatized carboxylic acids [L1 = 1-methylpyrrole-2-carboxylate] and [L2 = N-methyl-3-indoleglyoxylate] were used as ligands to prepare six lanthanide coordination compounds [(L 1)3Ln]n (Ln = Eu, 1; Gd, 2; Tb, 3) and [(L 2)n-Ln(NO3)(MeOH)2]n (Ln = Eu, 4; Gd, 5; Tb, 6). These complexes have been synthesized and structurally characterized by single-crystal X-ray diffraction. The phosphorescence behavior of the ligands in the Gd3+ complexes show that modification of the ligands can tune the triplet energy levels of the ligands so that they match the 5D0 energy level of Eu3+ and the 5D4 energy level of Tb3+; thus, the energy transfer efficiency from antenna to Eu3+ and Tb3+ is improved, and the Eu3+ and Tb3+ emission intensity is enhanced. This concept can be applied towards improving the luminescent properties of Ln3+ complexes by the modification of coordinating ligands. © Wiley-VCH Verlag GmbH & Co. KGaA, 2007.

KW - Europium

KW - Lanthanide

KW - Luminescence

KW - Pyrrole

KW - Terbium

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JO - European Journal of Inorganic Chemistry

JF - European Journal of Inorganic Chemistry

IS - 34

ER -

Synthesis, crystal structures, and photophysical properties of lanthanide complexes containing pyrrole-derivatized carboxylate ligands

Abstract

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Research Keywords

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