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A Promising Mg II ‐Ion‐Selective Luminescent Probe: Structures and Properties of Dy–Mn Polymers with High Symmetry
Author(s) -
Zhao Bin,
Gao HongLing,
Chen XiaoYan,
Cheng Peng,
Shi Wei,
Liao DaiZheng,
Yan ShiPing,
Jiang ZongHui
Publication year - 2005
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200500754
Subject(s) - luminescence , nanoporous , polymer , materials science , crystallography , thermal stability , metal , metal ions in aqueous solution , ligand (biochemistry) , chemistry , nanotechnology , organic chemistry , composite material , optoelectronics , metallurgy , biochemistry , receptor
Two Dy–Mn polymers, {[Dy(L 1 ) 3 Mn 1.5 (H 2 O) 3 ]⋅3.125 H 2 O} n ( 1 , L 1 =pyridine‐2,6‐dicarboxylic acid) and {[Dy(L 2 ) 3 Mn 1.5 (H 2 O) 6 ]⋅8.25 H 2 O} n ( 2 , L 2 = 4‐hydroxylpyridine‐2,6‐dicarboxylic acid), with high symmetry ( S 6 ) have been prepared. Polymer 1 has a nanoporous 3D framework with channel of about 17.6 Å diameter, while 2 has a honeycomb‐type 2D structure with the cavity of approximately 14.4 Å diameter. In the construction of multidimensional porous polymers with 3d–4f mixed metals, it is the first observation that a ligand substituent effect leads to dramatic differences in the structures formed. Luminescent studies reveal that the emission intensities of 1 and 2 increase significantly upon the addition of Mg 2+ , whereas the introduction of other metal ions leaves the intensity unchanged or even weakens it; hence, both of them may serve as good candidates of Mg 2+ luminescent probes. To our knowledge, complex 1 is also the first example of a 3d–4f metal‐based nanoporous polymer to exhibit luminescent selectivity for Mg 2+ . Magnetic susceptibility measurements reveal a rather rare ferromagnetic interaction in 2 . Thermal gravimetric analyses and powder X‐ray diffraction investigations have also been performed, suggestive of high thermal stability of 1 .