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Effect of Linker Length in semi ‐flexible 4,4′‐Bispyridyl Ligands with Functional Spacer on the Architecture of their M(NO 3 ) 2 Complexes
Author(s) -
Qiao YuQin,
Lü XingQiang,
Su ChengYong,
Kang BeiSheng
Publication year - 2007
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200700362
Subject(s) - linker , isostructural , diimide , zigzag , crystallography , ligand (biochemistry) , chemistry , metal , stereochemistry , ion , materials science , molecule , crystal structure , organic chemistry , receptor , geometry , mathematics , computer science , operating system , biochemistry , perylene
Two semi ‐flexible 4,4′‐bispyridyl ligands, N,N ′‐bis(4‐pyridylethyl) pyromellitic diimide (4‐pepmd) and N,N ′‐bis(4‐pyridylmethyl)pyromellitic diimide (4‐pmpmd), with different linker length, and their coordination polymers obtained by reaction with M(NO 3 ) 2 (M = Co or Cd) in mixed CHCl 3 and ROH solvents are reported. 2D (6,3) brick‐wall networks with Py 3 M nodes for the isostructural [Co(4‐pepmd) 1.5 (NO 3 ) 2 ] n · nCHCl 3 · 2nH 2 O · nEtOH ( 1 ) and [Cd(4‐pepmd) 1.5 (NO 3 ) 2 ] n · nCHCl 3 · nH 2 O · 2nMeOH ( 2 ), and 1D zigzag chain with Py 2 M nodes for [Co(4‐pmpmd)(NO 3 ) 2 ] n · nCHCl 3 ( 3 ) are observed. The ligand 4‐pepmd with longer linker –(CH 2 ) 2 – induces exclusively trispyridyl building blocks and 2D networks in its Co and Cd complexes, while the coordination preference of metal ions works more effectively for shorter linked 4‐pmpmd to give either 1D (for Co, 3 ) or 2D [Cd(4‐pmpmd) 1.5 (NO 3 ) 2 ] n · nCHCl 3 ( 4 ) [10] polymer depending on the size of the metal ion.