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Crystals 2017, 7(5), 139; doi:10.3390/cryst7050139

Preparation, Crystal structure and Luminescence Properties of Lanthanide Complexes with 2,4,6-tri(pyridin-2-yl)-1,3,5-triazine and Organic Carboxylic Acid

1
College of Chemistry and Chemical Engineering, Inner Mongolia University, Huhhot 010021, China
2
Hulun Buir Institute of Environmental Science, Hulun Buir 021008, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Ingo Hartenbach
Received: 1 April 2017 / Revised: 9 May 2017 / Accepted: 10 May 2017 / Published: 14 May 2017
(This article belongs to the Special Issue Luminescent Properties of Lanthanoid Doped Crystals)
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Abstract

Five crystal complexes {[Eu2(TPTZ)2(mNBA)6(H2O)2]·2CH3OH}n (1), [Eu(TPTZ)(CF3COO)(H2O)5]·Cl2·CH3CH2OH (2), {[Yb2(TPTZ)2(BDC)3]·2H2O}n (3), [Yb(TPTZ)Cl(H2O)4]·Cl2 (4) and [Er(TPTZ)(TTA)Cl2] (5) (mNBA = m-nitro benzoate, BDC = terephthalate, TTA = thenoyltrifluoroacetone, TPTZ = 2,4,6-tri(2-pyridyl)-1,3,5-triazine) have been synthesized. The single X-ray diffraction reveals that TPTZ is mainly in the trident coordination mode and organic aromatic carboxylic acids are in the multiple coordination modes in the crystals. The composition of solvents, reaction temperature and reactant ratios all affect the composition and structure of the formed crystals. Crystals 1 and 3 belong to triclinic system, while the other three belong to monoclinic system. Among them, Crystal complexes 1 and 3 are coordination polymers. The other three crystals are mononuclear complexes with LnШ ions in the asymmetric environment. Both of the Crystal complexes 1 and 2 show strong luminescence emissions of Eu3+. The luminescence lifetimes of the two complexes are 0.761 ms and 0.447 ms, respectively. In addition, their luminescence quantum efficiencies are 25.0% and 16.7%, respectively. View Full-Text
Keywords: lanthanide complexes; 2,4,6-tri(pyridin-2-yl)-1,3,5-triazine; aromatic carboxylic acids; crystal structure; luminescence lanthanide complexes; 2,4,6-tri(pyridin-2-yl)-1,3,5-triazine; aromatic carboxylic acids; crystal structure; luminescence
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Li, J.; Zhang, X.; Yue, B.; Wang, A.; Chu, H.; Zhao, Y. Preparation, Crystal structure and Luminescence Properties of Lanthanide Complexes with 2,4,6-tri(pyridin-2-yl)-1,3,5-triazine and Organic Carboxylic Acid. Crystals 2017, 7, 139.

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