TY - JOUR
T1 - Synthesis, structure, topology and magnetic properties of new coordination polymers based on 5(-Br/-COOH)-substituted nicotinic acid
AU - Nandi, Goutam
AU - Thakuria, Ranjit
AU - Titi, Hatem M.
AU - Patra, Ranjan
AU - Goldberg, Israel
PY - 2014/6/28
Y1 - 2014/6/28
N2 - Nine new coordination polymers of 5-substituted nicotinic acid (with either -Br, HBNA, or -COOH, 3,5-H2PDC) with d-transition (Co, Ni, Zn and Cd) and f-lanthanoid (La, Ce, Sm and Tb) metal ions have been synthesized. The two metal complexes [Co2(BNA)4(H2O)] n·H2O (1a) and [Cd(BNA)2]n (1b) have polymorphic/isomeric structures to those of metal-organic-frameworks (MOFs) with similar structural building units (SBUs) reported earlier. Modified reaction conditions yielded new isomeric metal complexes in the present case. Reactions of the 3,5-H2PDC linker with different metal ions led to the formation of polymeric complexes [Mn3(3,5-PDC) 3(DMA)3]n·DMA (2a), [Zn(3,5-PDC)(DMA)] n·DMA (2b) and [Cd2(3,5-PDC)2(DMA) 4]n (2c), as well as lanthanoid MOFs [Sm(3,5-PDC) 1.5(DMF)]n·DMF (2d, as well as isomorphous products with La (2f) and Ce (2g) ions) and [Tb2(3,5-PDC)3(DMF) 2]n·DMF (2e). Networking diversity observed in these coordination polymers with the conformationally rigid 5-substituted nicotinic acid ligand is discussed. The magnetic properties of 2a, 2d and 2e have been studied as well. This journal is
AB - Nine new coordination polymers of 5-substituted nicotinic acid (with either -Br, HBNA, or -COOH, 3,5-H2PDC) with d-transition (Co, Ni, Zn and Cd) and f-lanthanoid (La, Ce, Sm and Tb) metal ions have been synthesized. The two metal complexes [Co2(BNA)4(H2O)] n·H2O (1a) and [Cd(BNA)2]n (1b) have polymorphic/isomeric structures to those of metal-organic-frameworks (MOFs) with similar structural building units (SBUs) reported earlier. Modified reaction conditions yielded new isomeric metal complexes in the present case. Reactions of the 3,5-H2PDC linker with different metal ions led to the formation of polymeric complexes [Mn3(3,5-PDC) 3(DMA)3]n·DMA (2a), [Zn(3,5-PDC)(DMA)] n·DMA (2b) and [Cd2(3,5-PDC)2(DMA) 4]n (2c), as well as lanthanoid MOFs [Sm(3,5-PDC) 1.5(DMF)]n·DMF (2d, as well as isomorphous products with La (2f) and Ce (2g) ions) and [Tb2(3,5-PDC)3(DMF) 2]n·DMF (2e). Networking diversity observed in these coordination polymers with the conformationally rigid 5-substituted nicotinic acid ligand is discussed. The magnetic properties of 2a, 2d and 2e have been studied as well. This journal is
UR - http://www.scopus.com/inward/record.url?scp=84901788858&partnerID=8YFLogxK
U2 - 10.1039/c4ce00300d
DO - 10.1039/c4ce00300d
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AN - SCOPUS:84901788858
SN - 1466-8033
VL - 16
SP - 5244
EP - 5256
JO - CrystEngComm
JF - CrystEngComm
IS - 24
ER -