Synthesis, crystal structures, and luminescence of organic-lanthanide complexes with nicotinate and isonicotinate ligands

Guohua Jia; Ga Lai Law; Ka Leung Wong; Peter A. Tanner; Wing Tak Wong

doi:10.1021/ic8010103

Synthesis, crystal structures, and luminescence of organic-lanthanide complexes with nicotinate and isonicotinate ligands

Guohua Jia
, Ga Lai Law
, Ka Leung Wong
, Peter A. Tanner
, Wing Tak Wong

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

54 Citations (Scopus)

Abstract

Six lanthanide coordination compounds with two isomeric carboxylic acids, nicotinic acid (HL¹) and isonicotinic acid (HL²), [(L ¹)₃Ln(H₂O)₂]₂ (Ln = Eu, 1; Gd, 2; Tb, 3) and [(L²)₂Ln(H₂O) ₄][NO₃] (Ln = Eu, 4; Gd, 5; Tb, 6), have been synthesized and structurally characterized by single-crystal X-ray diffraction. Complexes 1-3 are dimeric whereas 4-6 are polymeric, all with 8-coordination of Ln ³⁺. The distinction between these lanthanide complexes is readily accomplished from the 10 K high resolution electronic emission spectra. Spectral interpretation is given for the Eu³⁺ complexes 1, 4, whereas the spectra of 3 and 6 are more complex. The relationships between spectroscopic and crystallographic site symmetries are discussed. The calculated second rank crystal field strengths of Eu³⁺ in 1 and 4 are intermediate in magnitude.

Original language	English
Pages (from-to)	9431-9438
Number of pages	8
Journal	Inorganic Chemistry
Volume	47
Issue number	20
DOIs	https://doi.org/10.1021/ic8010103
Publication status	Published - 20 Oct 2008

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry

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10.1021/ic8010103

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@article{12860ef6b0c948c6aedb46bf67ddde49,

title = "Synthesis, crystal structures, and luminescence of organic-lanthanide complexes with nicotinate and isonicotinate ligands",

abstract = "Six lanthanide coordination compounds with two isomeric carboxylic acids, nicotinic acid (HL1) and isonicotinic acid (HL2), [(L 1)3Ln(H2O)2]2 (Ln = Eu, 1; Gd, 2; Tb, 3) and [(L2)2Ln(H2O) 4][NO3] (Ln = Eu, 4; Gd, 5; Tb, 6), have been synthesized and structurally characterized by single-crystal X-ray diffraction. Complexes 1-3 are dimeric whereas 4-6 are polymeric, all with 8-coordination of Ln 3+. The distinction between these lanthanide complexes is readily accomplished from the 10 K high resolution electronic emission spectra. Spectral interpretation is given for the Eu3+ complexes 1, 4, whereas the spectra of 3 and 6 are more complex. The relationships between spectroscopic and crystallographic site symmetries are discussed. The calculated second rank crystal field strengths of Eu3+ in 1 and 4 are intermediate in magnitude.",

author = "Guohua Jia and Law, \{Ga Lai\} and Wong, \{Ka Leung\} and Tanner, \{Peter A.\} and Wong, \{Wing Tak\}",

year = "2008",

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doi = "10.1021/ic8010103",

language = "English",

volume = "47",

pages = "9431--9438",

journal = "Inorganic Chemistry",

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TY - JOUR

T1 - Synthesis, crystal structures, and luminescence of organic-lanthanide complexes with nicotinate and isonicotinate ligands

AU - Jia, Guohua

AU - Law, Ga Lai

AU - Wong, Ka Leung

AU - Tanner, Peter A.

AU - Wong, Wing Tak

PY - 2008/10/20

Y1 - 2008/10/20

N2 - Six lanthanide coordination compounds with two isomeric carboxylic acids, nicotinic acid (HL1) and isonicotinic acid (HL2), [(L 1)3Ln(H2O)2]2 (Ln = Eu, 1; Gd, 2; Tb, 3) and [(L2)2Ln(H2O) 4][NO3] (Ln = Eu, 4; Gd, 5; Tb, 6), have been synthesized and structurally characterized by single-crystal X-ray diffraction. Complexes 1-3 are dimeric whereas 4-6 are polymeric, all with 8-coordination of Ln 3+. The distinction between these lanthanide complexes is readily accomplished from the 10 K high resolution electronic emission spectra. Spectral interpretation is given for the Eu3+ complexes 1, 4, whereas the spectra of 3 and 6 are more complex. The relationships between spectroscopic and crystallographic site symmetries are discussed. The calculated second rank crystal field strengths of Eu3+ in 1 and 4 are intermediate in magnitude.

AB - Six lanthanide coordination compounds with two isomeric carboxylic acids, nicotinic acid (HL1) and isonicotinic acid (HL2), [(L 1)3Ln(H2O)2]2 (Ln = Eu, 1; Gd, 2; Tb, 3) and [(L2)2Ln(H2O) 4][NO3] (Ln = Eu, 4; Gd, 5; Tb, 6), have been synthesized and structurally characterized by single-crystal X-ray diffraction. Complexes 1-3 are dimeric whereas 4-6 are polymeric, all with 8-coordination of Ln 3+. The distinction between these lanthanide complexes is readily accomplished from the 10 K high resolution electronic emission spectra. Spectral interpretation is given for the Eu3+ complexes 1, 4, whereas the spectra of 3 and 6 are more complex. The relationships between spectroscopic and crystallographic site symmetries are discussed. The calculated second rank crystal field strengths of Eu3+ in 1 and 4 are intermediate in magnitude.

UR - https://www.scopus.com/pages/publications/55249114408

U2 - 10.1021/ic8010103

DO - 10.1021/ic8010103

M3 - Journal article

SN - 0020-1669

VL - 47

SP - 9431

EP - 9438

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 20

ER -

Synthesis, crystal structures, and luminescence of organic-lanthanide complexes with nicotinate and isonicotinate ligands

Abstract

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