Synthesis, Structures, and Luminescence Properties of Lanthanide Complexes with Structurally Related New Tetrapodal Ligands Featuring Salicylamide Pendant Arms
To explore the relationships between the structures of ligands and their complexes, we have synthesized and characterized a series of lanthanide complexes with two structurally related ligands, 1,1,1,1-tetrakis{[(2′-(2-benzylaminoformyl))phenoxyl]methyl}methane (LI) and 1,1,1,1-tetrakis{[(2′-(2-pico...
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Published in | Inorganic chemistry Vol. 47; no. 24; pp. 11501 - 11513 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
American Chemical Society
15.12.2008
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Online Access | Get full text |
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Summary: | To explore the relationships between the structures of ligands and their complexes, we have synthesized and characterized a series of lanthanide complexes with two structurally related ligands, 1,1,1,1-tetrakis{[(2′-(2-benzylaminoformyl))phenoxyl]methyl}methane (LI) and 1,1,1,1-tetrakis{[(2′-(2-picolyaminoformyl))phenoxyl]methyl}methane (LII). A series of zero- to three-dimensional lanthanide coordination complexes have been obtained by changing the substituents on the Pentaerythritol. Our results revealed that, complexes of the LI ligand, {Ln4LI 3(NO3)12·nC4H10O}∞ (Ln = Nd, Eu, Tb, Er, n = 3 or 6)] show the binodal 3,4-connected three-dimensional interpenetration coordination polymers with topology of a (83)4(86)3 notation. Compared to LI, complexes of LII present a cage-like homodinuclear [Ln2LII 2(NO3)6·2H2O]·nH2O (Ln = Nd, Tb, Dy, n = 0 or 1) or a helical one-dimensional coordination {[ErLII(NO3)3·H2O]·H2O}∞ polymer. The luminescence properties of the resulting complexes formed with ions used in fluoroimmunoassays (Ln = Eu, Tb) are also studied in detail. It is noteworthy that subtle variation of the terminal group from benzene to pyridine not only sensibly affects the overall molecular structures but also the luminescence properties as well. |
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Bibliography: | CIF files, tables of interatomic distances and angles for compounds 1−8, and figures with phosphorescence spectra of GdIII complex of ligand LI and LII, and the room-temperature solid-state phosphorescence lifetime of Eu, Tb complex of ligand LI and LII. This material is available free of charge via the Internet at http://pubs.acs.org. istex:DC0AF947906E4A667606C78DD59585DF47133D07 ark:/67375/TPS-DTNS857P-D ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0020-1669 1520-510X |
DOI: | 10.1021/ic8008267 |