Metal–organic coordination polymers based on a flexible tetrahydrofuran-2,3,4,5-tetracarboxylate ligand: syntheses, crystal structures, and magnetic/photoluminescent properties

Content Provider	Semantic Scholar
Author	Liu, Chun-Sen Sañudo, E. Carolina Zhou, Liming Guo, Liang-Qi Ma, Song-Tao Gao, Lijun Fang, Shaoming
Copyright Year	2010
Abstract	The coordination possibilities of flexible heteroalicyclic ligands with transition metals have been explored. Five CuII, MnII, and CdII coordination polymers with the fully deprotonated tetrahydrofuran-2,3,4,5-tetracarboxylate (L) ligand were synthesized and characterized, sometimes incorporating different auxiliary ligands: {[Cu2(L)(H2O)](H2O)1.42}∞ (1), {[Cu2(L)(2bpy)(H2O)2](H2O)2}∞ (2), {[Cu2(L)(phen)(H2O)2](H2O)1.5(CH3OH)0.25}∞ (3), {[Mn2(L)(phen)2(H2O)](H2O)2}∞ (4), and {[Cd2(L)(phen)2(H2O)](H2O)2}∞ (5) (2bpy = 2,2′-bipyridine and phen = 1,10-phenanthroline). The structural analysis related to 1–5 reveals that the fully deprotonated L ligand displays versatile coordination modes, which result in the generation of a fairly complicated three dimensional (3D) framework for 1 with a Schlafli symbol of (43·67)(46·64), two isostructural two dimensional (2D) puckered layers for 2 and 3 with the decorated binodal (3,5)-connected (3·52)2(32·53·64·7) topology, and two isostructural one dimensional (1D) ribbon-like chains for 4 and 5, respectively. The present work indicates that, in comparison with the rigid aromatic multicarboxylate ligands, tetrahydrofuran-2,3,4,5-tetracarboxylate (L), a heteroalicyclic multicarboxylate ligand, has richer coordination modes and a more flexible ring skeleton, which may remain largely unexpected in the process of constructing metal–organic frameworks (MOFs) and make it more difficult to predict and control the final coordination polymers. Magnetic susceptibility measurements demonstrate that complexes 1 and 4 exhibit antiferromagnetic coupling, whereas 2 and 3 show ferromagnetic coupling, with the corresponding J values of −23.62 cm−1 for 1, 5.18 cm−1 for 2, 3.90 cm−1 for 3, and −0.79 cm−1 for 4. Moreover, complex 5 displays solid blue emission originating from an intraligand π → π* transition of the auxiliary phen ligand.
Starting Page	853
Ending Page	865
Page Count	13
File Format	PDF HTM / HTML
DOI	10.1039/B912972N
Volume Number	12
Alternate Webpage(s)	http://www.rsc.org/suppdata/ce/b9/b912972n/b912972n.pdf
Alternate Webpage(s)	https://doi.org/10.1039/B912972N
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article