Homodinuclear lanthanide {Ln2} (Ln = Gd, Tb, Dy, Eu) complexes prepared from an o-vanillin based ligand: luminescence and single-molecule magnetism behavior.

作者： Prasenjit Bag , Chandresh Kumar Rastogi , Sourav Biswas , Sri Sivakumar , Valeriu Mereacre

关键词: Crystallography 、 Pivalic acid 、 Square antiprism 、 Molecule 、 Denticity 、 Lanthanide 、 Quantum yield 、 Chemistry 、 Luminescence 、 Ligand 、 Inorganic chemistry

摘要: Four dinuclear lanthanide complexes [Gd2 (H2L)2 (µ-piv)2 (piv)2]·2CHCl3 (1), [Tb2 (2), [Dy2 (3) and [Eu2 (4) were synthesized by the reaction of appropriate Ln(III) chloride salts a multidentate ligand, 2,2′-(2-hydroxy-3-methoxy-5-methylbenzylazanediyl)diethanol (H3L) in presence pivalic acid. 1–4 are neutral held two monoanionic, [H2L]− ligands. The ions doubly bridged to each other via phenolate oxygen atoms. Both nine coordinated possess distorted capped square antiprism geometry. Photophysical studies reveal that Tb3+ (2) Dy3+ display strong ligand-sensitized lanthanide-characteristic emission. complex shows very high overall quantum yield 76.2% with lifetime 1.752 ms. Magnetic single-molecule magnet behavior for 3 which its ac susceptibility two-step slow relaxation yielding effective energy barriers ΔE = 8.96 K 35.51 K.

参考文章(99)

剛村尾, G.H. Dieke: Spectra and Energy Levels of Rare Earth Ions in Crystals, Interscience Pub., New York, 1968, 401頁, 16×23.5cm, $13.95. 日本物理學會誌. ,vol. 24, pp. 557- 558 ,(1969)

Rodolphe Clérac, Richard E. P. Winpenny, Single-Molecule Magnets and Related Phenomena Structure and Bonding. ,vol. 172, pp. 35- 48 ,(2016) , 10.1007/430_2015_198

Simon Cotton, Lanthanide and Actinide Chemistry ,(2006)

Magnetism: Molecules to Materials IV Magnetism: Molecules to Materials IV. pp. 496- ,(2001) , 10.1002/9783527620548

Antony J. Hannaford, Peter W. G. Smith, Austin R. Tatchell, Brian S. Furniss, Vogel's Textbook of Practical Organic Chemistry ,(1996)

Andrew Beeby, Stephen Faulkner, David Parker, J. A. Gareth Williams, Sensitised luminescence from phenanthridine appended lanthanide complexes: analysis of triplet mediated energy transfer processes in terbium, europium and neodymium complexes Journal of The Chemical Society-perkin Transactions 1. pp. 1268- 1273 ,(2001) , 10.1039/B009624P

Vadapalli Chandrasekhar, Prasenjit Bag, Enrique Colacio, Octanuclear {Ln(III)8}(Ln = Gd, Tb, Dy, Ho) macrocyclic complexes in a cyclooctadiene-like conformation: manifestation of slow relaxation of magnetization in the Dy(III) derivative. Inorganic Chemistry. ,vol. 52, pp. 4562- 4570 ,(2013) , 10.1021/IC400091J

Ercules ES Teotonio, Hermi F Brito, Maria Cláudia FC Felinto, Larry C Thompson, Victor G Young, Oscar L Malta, None, Preparation, crystal structure and optical spectroscopy of the rare earth complexes (RE3+=Sm, Eu, Gd and Tb) with 2-thiopheneacetate anion Journal of Molecular Structure. ,vol. 751, pp. 85- 94 ,(2005) , 10.1016/J.MOLSTRUC.2005.05.001

José Ruiz, Antonio J. Mota, Antonio Rodríguez-Diéguez, Silvia Titos, Juan Manuel Herrera, Eliseo Ruiz, Eduard Cremades, Jean Pierre Costes, Enrique Colacio, Field and dilution effects on the slow relaxation of a luminescent DyO9 low-symmetry single-ion magnet. Chemical Communications. ,vol. 48, pp. 7916- 7918 ,(2012) , 10.1039/C2CC32518G

10.

Cristiano Benelli, Dante Gatteschi, Magnetism of lanthanides in molecular materials with transition-metal ions and organic radicals. Chemical Reviews. ,vol. 102, pp. 2369- 2388 ,(2002) , 10.1021/CR010303R

Homodinuclear lanthanide {Ln2} (Ln = Gd, Tb, Dy, Eu) complexes prepared from an o-vanillin based ligand: luminescence and single-molecule magnetism behavior.

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Homodinuclear lanthanide {Ln2} (Ln = Gd, Tb, Dy, Eu) complexes prepared from an o-vanillin based ligand: luminescence and single-molecule magnetism behavior.

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