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Hydrothermal synthesis, crystal structure and fluorescence quenching of hexanuclear complexes (Ln = La, Nd) containing macrocyclic oxamide ligands

✍ Scribed by Sun Yaqiu; Yang Guangming; Liao Daizheng; Jiang Zonghui; Yan Shiping; Cheng Peng

Book ID
104058697
Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
742 KB
Volume
842
Category
Article
ISSN
0022-2860

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✦ Synopsis

Two novel macrocyclic oxamidato-bridged complex [La (NiL) 3-dioxo-5, 6, 14, 15-dibenzo-1,4,8,12-tetraazacyclo-pentadeca-7,13-dien), have been hydrothermally synthesized and structurally determined. Compound 1 crystallizes in the triclinic space group PΓ€1 with a = 17.534( 6) A ˚, b = 18.626(6) A ˚, c = 18.726(6) A ˚, a = 97.115(6)Β°, b = 114.253(5)Β°, c = 108.449(5)Β°and Z = 2; whereas 2 crystallizes in the monoclinic system, P2(1)/n group, a = 17.805(5) A ˚, b = 24.073(7) A ˚, c = 23.570(6) A ˚, a = c = 90Β°, b = 102.950(6)Β°and Z = 4. The fluorescences of Nd III are almost completely quenched in 2.

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## Abstract Three novel oxamidato‐bridged complexes incorporating a macrocyclic oxamide of formula [(CuL)~3~{CuL(C~2~H~5~OH)}Eu(H~2~O)](ClO~4~)~3~Β·1.5H~2~O (1), [(CuL)~3~{CuL(C~2~H~5~OH)}Tb(H~2~O)](ClO~4~)~3~Β·2H~2~O (2) and [(NiL)~5~Sm](ClO~4~)~3~Β·2H~2~O (3) (CuL and NiL, H~2~L = 2,3‐dioxo‐5,6,14,1