Ion size dominated 1D and 2D Salen lanthanide coordination complexes and their luminescence |
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Authors: | Ting Gao Peng-Fei Yan Guang-Ming Li Guang-Feng Hou Jin-Sheng Gao |
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Institution: | aSchool of Chemistry and Materials Science, Heilongjiang University, No. 74, Xuefu Road, Nangang District, Harbin 150080, PR China |
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Abstract: | Lewis acid/base addition between Ln(NO3)3 · 6H2O (Ln = Pr, Nd, Sm, Eu, Tb and Lu) and H2salen H2salen = N,N′-ethylenebis(salicylideneimine)] gives rise to an array of coordination polymeric structures. Crystal structural analysis reveals that Salen effectively functions as a bridging ligand in these compounds. The size of the lanthanide ions controls the structures of these Salen lanthanide complexes. Two representative structures with one dimensional and two dimensional topologies, viz. Pr(H2salen)(NO3)3(CH3OH)2]n (1) and Ln(H2salen)1.5(NO3)3]n Ln = Pr (2), Nd (3), Sm (4), Eu (5), Tb (6) and Lu (7)] are reported. Luminescent spectra of complexes 4 and 5 exhibit characteristic metal-centered emission lines. However, the characteristic luminescence of the terbium(III) ion is not observed either in solution or in the solid state of complex 6. |
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Keywords: | Synthesis Salen Lanthanide Coordination polymer Luminescence |
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