| In this paper, twelve coordination polymers?CPs? based on new semirigid carboxylate ligands and various N-donor ligands have been synthesized under solvothermal conditions. To understand these CPs completely, elemental analysis, IR, single crystal X-ray diffraction, powder X-ray diffraction?PXRD? and thermogravimetric studies have been carried out. Moreover, their magnetic and fluorescence properties also have been investigated.1. Four manganese??? coordination polymers have been successfully obtained, namely, [Mn?L1?0.5?bipy?0.5?H2O?]n?1?, [Mn2?L1??1,4-bimb??H2O?2]n?2?, [Mn?L1?0.5?4,4'-bibp?0.5?H2O?2]n?3?, [Mn2?L1??phen?2?H2O?4]n?4?, where H4L1 = 5,5'-?[1,1'-biphenyl]-4,4'-diylbis?oxy??diisophthalic acid, bipy = 4,4'-bipyridine, 1,4-bimb = 1,4-bis?imidazol-1-ylmethyl? benzene, 4,4'-bibp = 4,4'- di?1H-imidazol-1-yl?-1,1'-biphenyl and phen = 1,10-phenanthroline. Complexes 1 and 2 possess three-dimensional?3D? pillared-layer frameworks, 2-fold and 3-fold interpenetration take place in 1 and 2, respectively. In complex 3, 2D layers are linked by hydrogen bonds, finally, exhibiting a 3D supramolecular architecture. Complex 4 is a 0D structure. Meanwhile, the magnetic behaviors of complexes 1 and 2 have been investigated and weak antiferromagnetic interactions between two Mn??? centres in them have been revealed.2. Four novel cobalt??? complexes {[Co3?L3?2?dib?3?H2O?2]·2H2O}n?5?,{[Co3?L3?2?4,4'-bibp?3?H2O?4]·2H2O}n?6?, {[Co?HL3??bidpe?]·H2O}n?7? and {[Co2?L3??bib?0.5??3-OH?]·2H2O}n?8? have been prepared, where H3L3 = 3-??6-carboxynaphthalen-2-yl?oxy?phthalic acid, dib = 1,4-di?1H-imidazol-1-yl? benzene, 4,4'-bibp = 4,4'-di?1H-imidazol-1- yl?-1,1'-biphenyl, bidpe = 1,1'-?oxybis?4,1-phenylene??bis?1H-imidazole?, bib = 4,4'-bis??2-methyl-1H-imidazol-1-yl?methyl?-1,1'-biphenyl. Single crystal X-ray analysis reveals that complex 5 exhibits an infinite 2D framework formed by the L3- and dib ligands, complex 6 displays a 3D supramolecular architecture linked by hydrogen bonds, complex 7 features a 1D chain in which lattice water molecules locate with the help of hydrogen bonds, complex 8 is a homochiral 3D network with right-handed 43 and 21 helix. Additionally, the magnetic behaviors for 5–8 have also been studied, revealing antiferromagnetic interactions between Co??? ions in them.3. Two novel Zn??? coordination polymers, namely {[Zn3?L4?2?bipy?2?H2O?4}n?9? and {[Zn?HL4??4,4'-bibp?}n?10? have been obtained by employing a tricarboxylate ligand?H3L4? and different N-containing ligands, where H3L4 = 4-??6-carboxynaphthalen-2-yl?oxy?phthalic acid, bipy = 4,4'-bipyridine, 4,4'-bibp = 4,4'-di?1H-imidazol-1- yl?-1,1'-biphenyl. Single crystal X-ray analysis reveals that complex 9 exhibits a 2D layer framework formed by the L3- and bipy ligands, complex 10 displays an infinite 1D structure with Zn2 units built by 4,4'-bibp ligands. Moreover, 9 and 10 have been chosen as fluorescent probes to sense different metal ions, showing the obviously selective response to Fe3+ ion through luminescence quenching.4. Complex 11, namely {Co?H2L5??1,4-dpb?2}n have been built by a tetracarboxylate ligand?H4L5? and N-containing ligand, where H4L5 = 4,4'-?[1,1'-biphenyl]-2,2'-diylbis?oxy??diphthalic acid and 1,4-dpb = 1,4-di?pyridin-4-yl?benzene, it possess a 3D pillared-layer framework; {Zn?L6??H2O?2}n?12? have been prepared by employing a tetracarboxylate ligand?H4L6 = 3,3'-?[1,1'-biphenyl]-2,2'-diylbis?oxy??diphthalic acid?, it exhibits a 2D layer framework. |
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