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Metallogels and Silver Nanoparticles Generated from a Series of Transition Metal-Based Coordination Polymers Derived from a New Bis-pyridyl-bis-amide Ligand and Various Carboxylates

By Karabi Nath (1540174), Ahmad Husain (1516276) and Parthasarathi Dastidar (1516270)


A new series of coordination polymers, namely, <b>CP2</b> [{(H<sub>2</sub>O)­Co<sub>1.5</sub>(μ-3-bpna)<sub>1.5</sub>(μ-btc)}·3DMF·3H<sub>2</sub>O]<sub>α</sub>, <b>CP3</b> [{Cd­(μ-3-bpna)­(μ-hbtc)}·CH<sub>3</sub>OH·2H<sub>2</sub>O]<sub>α</sub>, <b>CP4</b> [{Co­(μ-3-bpna)­(μ-ipa)}·DMF·2H<sub>2</sub>O]<sub>α</sub>, <b>CP5</b> [{Co­(μ-3-bpna)­(μ-1,3-pda)}·DMF]<sub>α</sub>, <b>CP6</b> [Cd­(μ-3-bpna)<sub>0.5</sub>(μ-1,3-pda)]<sub>α</sub>, <b>CP7</b> [(H<sub>2</sub>O)­Co<sub>0.5</sub>(μ-3-bpna)<sub>0.5</sub>(μ-1,4-pda)<sub>0.5</sub>]<sub>α</sub>, and <b>CP8</b> [{Zn­(μ-3-bpna)­(μ-oba)}·DMF·2H<sub>2</sub>O]<sub>α</sub>, has been synthesized by reacting a hydrogen-bond-functionalized bis-pyridyl ligand, namely, <i>N</i>′,<i>N</i>″-di­(pyridin-3-yl)­naphthalene-2,6-dicarboxamide, with various transition metal salts and different di- or tricarboxylates (as co-ligand) displaying 2D and 3D network topology and having lattice-occluded solvents in the majority of cases. A 1D coordination polymer, namely, <b>CP1</b> [{Ag<sub>0.5</sub>(μ-3-bpna)}<sub>0.5</sub>·0.5BF<sub>4</sub>·CH<sub>3</sub>CN]<sub>α</sub>, has also been isolated by reacting 3-<b>bpna</b> with AgBF<sub>4</sub> in the absence of any carboxylate co-ligand. All of the CPs were characterized by single crystal X-ray diffraction. Interestingly, two such CPs, namely, <b>CP1</b> and <b>CP2</b>, produced metallogels, which were characterized by rheology, transmission electron microscopy, and X-ray powder diffraction. The metallogel of <b>CP1</b> produced Ag nanoparticles within the gel bed upon exposure to light

Topics: Biophysics, Biochemistry, Medicine, Biotechnology, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, CP 1, 1 D coordination polymer, 2O, Silver Nanoparticles Generated, transmission electron microscopy, transition metal salts, 3 D network topology
Year: 2015
DOI identifier: 10.1021/acs.cgd.5b00911.s002
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Provided by: FigShare
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