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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Vittal, Jagadese J. Toh, Belinda Mei Fang Kole, Goutam Kumar Peedikakkal, Abdul Malik Puthan |
| Description | Author Affiliation: Kole GK ( Department of Chemistry, National University of Singapore, Science Drive 3, 117543, Singapore.) |
| Abstract | An attempt has been made to design double-stranded ladder-like coordination polymers (CPs) of hemidirected $Pb^{II}.$ Four CPs, $[Pb(μ-bpe)(O_{2}C-C_{6}H_{5})_{2}]⋅2H_{2}O$ (1), $[Pb_{2}(μ-bpe)_{2}(μ-O_{2}C-C_{6}H_{5})_{2}(O_{2}C-C_{6}H_{5})_{2}]$ (2), $[Pb_{2}(μ-bpe)_{2}(μ-O_{2}C-p-Tol)_{2}(O_{2}C-p-Tol)_{2}]⋅$ $1.5 H_{2}O$ (3) and $[Pb_{2}(μ-bpe)_{2}(μ-O_{2}C-m-Tol)_{2}(O_{2}C-m-Tol)_{2}]$ (4) (bpe=1,2-bis(4′-pyridyl)ethylene), have been synthesised and investigated for their solid-state photoreactivity. CPs 2–4, having a parallel orientation of bpe molecules in their ladder structures and being bridged by carboxylates, were found to be photoreactive, whereas CP 1 is a linear one-dimensional (1D) CP with guest water molecules aggregating to form a hydrogen-bonded 1D structure. The linear strands of 1 were found to pair up upon eliminating lattice water molecules by heating, which led to the solid-state structural transformation of photostable linear 1D CP 1 into photoreactive ladder CP 2. In the construction of the double-stranded ladder-like structures, the parallel alignment of CC bonds in 2–4 is dictated by the chelating and $μ_{2}-η^{2}:η^{1}$ bridging modes of the benzoate and toluate ligands. The role of solvents in the formation of such double-stranded ladder-like structures has also been investigated. A single-crystal-to-single-crystal transformation occurred when 4 was irradiated under UV light to form $[Pb_{2}(rctt-tpcb)(μ-O_{2}C-m-Tol)_{2}(O_{2}C-m-Tol)_{2}]$ (5). |
| ISSN | 09476539 |
| e-ISSN | 15213765 |
| Journal | Chemistry - A European Journal |
| Issue Number | 12 |
| Volume Number | 19 |
| Language | English |
| Publisher | Wiley-VCH;ChemPubSoc Europe |
| Publisher Date | 2013-03-18 |
| Publisher Place | Germany |
| Access Restriction | Open |
| Subject Keyword | Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Catalysis |
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