Preparation, spectroscopic properties of 1,4-di (N,N-diisopropylacetamido)-2,3(1H,4H)-quinoxalinedione (L) lanthanide complexes and the supramolecular structure of [Nd{sub 2}L{sub 2}(NO{sub 3}){sub 6}(H{sub 2}O){sub 2}].H{sub 2}O

Journal Article · Sat Sep 15 04:00:00 EDT 2007 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2007.06.034· OSTI ID:21043848

Xueqin, Song ^[1]; Yang, Yu ^[1]; Wei, Dou; Jiangrong, Zheng; Junna, Yao ^[1]

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1. College of Chemistry and Chemical Engineering, State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000 (China)

The reaction of lanthanide nitrate with 1,4-di (N,N-diisopropylacetamido)-2,3(1H,4H)-quinoxalinedione (L) yields six novel Ln(III) complexes ([Ln{sub 2}L{sub 2}(NO{sub 3}){sub 6}(H{sub 2}O){sub 2}].H{sub 2}O) which are characterized by elemental analysis, thermogravimetric analysis (TGA), conductivity measurements, IR, electronic and {sup 1}H NMR spectroscopies. A new quinoxalinedione-based ligand is used as antenna ligand to sensitize the emission of lanthanide cations. The lowest triplet state energy level of the ligand in the nitrate complex matches better to the resonance level of Eu(III) and Sm(III) than Tb(III) and Dy(III) ion. The f-f fluorescence is induced in the Eu{sup 3+} and Sm{sup 3+} complexes by exciting into the {pi}-{pi}* absorptions of the ligand in the UV. Furthermore, the crystal structures of a novel binuclear complex [Nd{sub 2}L{sub 2}(NO{sub 3}){sub 6}(H{sub 2}O){sub 2}].H{sub 2}O has been determined by single-crystal X-ray diffraction. The binuclear [Nd{sub 2}L{sub 2}(NO{sub 3}){sub 6}(H{sub 2}O){sub 2}].H{sub 2}O complex units are linked by the intermolecular hydrogen bonds and {pi}-{pi} interactions to form a two-dimensional (2-D) layer supramolecule. - Graphical abstract: Preparation, spectroscopic properties of 1,4-di (N,N-diisopropylacetamido)-2,3(1H,4H)-quinoxalinedione (L) lanthanide complexes and the supramolecular structure of [Nd{sub 2}L{sub 2}(NO{sub 3}){sub 6}(H{sub 2}O){sub 2}].H{sub 2}O.

• OSTI ID: 21043848
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 9 Vol. 180; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CRYSTAL STRUCTURE
DYSPROSIUM COMPLEXES
EUROPIUM COMPLEXES
EUROPIUM IONS
FLUORESCENCE
LAYERS
LIGANDS
MONOCRYSTALS
NEODYMIUM COMPLEXES
NITRATES
NUCLEAR MAGNETIC RESONANCE
RARE EARTH COMPOUNDS
SAMARIUM COMPLEXES
SAMARIUM IONS
SPECTROSCOPY
TERBIUM COMPLEXES
THERMAL GRAVIMETRIC ANALYSIS
X-RAY DIFFRACTION