Please use this identifier to cite or link to this item:
|Title:||Solid-state structural transformations and photoreactivity of 1D-ladder coordination polymers of PbII|
|Citation:||Kole, G.K., Peedikakkal, A.M.P., Toh, B.M.F., Vittal, J.J. (2013-03-18). Solid-state structural transformations and photoreactivity of 1D-ladder coordination polymers of PbII. Chemistry - A European Journal 19 (12) : 3962-3968. ScholarBank@NUS Repository. https://doi.org/10.1002/chem.201203678|
|Abstract:||An attempt has been made to design double-stranded ladder-like coordination polymers (CPs) of hemidirected PbII. Four CPs, [Pb(μ-bpe)(O 2C-C6H5)2]×2H2O (1), [Pb2(μ-bpe)2(μ-O2C-C 6H5)2(O2C-C6H 5)2] (2), [Pb2(μ-bpe)2(μ- O2C-p-Tol)2(O2C-p-Tol)2]× 1.5 H2O (3) and [Pb2(μ-bpe)2(μ-O 2C-m-Tol)2(O2C-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 Cï£C bonds in 2-4 is dictated by the chelating and μ2-η2:η1 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 [Pb2(rctt-tpcb)(μ-O2C-m-Tol) 2(O2C-m-Tol)2] (5). Dehydrate to be photoactive! The solid-state structural transformation of a linear coordination polymer of PbII into the corresponding ladder coordination polymer (see figure) and a single-crystal-to-single-crystal [2+2] cycloaddition reaction under UV light are reported. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.|
|Source Title:||Chemistry - A European Journal|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Mar 17, 2019
WEB OF SCIENCETM
checked on Mar 6, 2019
checked on Dec 7, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.