Identification of a robust and reproducible noncluster-type SBU: effect of coexistent groups on network topologies, helicity, and properties

The present work is part of our ongoing quest for a robust and reproducible noncluster-type secondary building unit (SBU) using pyrazole based ditopic ligands and benzene polycarboxylic acids. We report here the construction of a series of Zn(ii) coordination polymers using a tailor-made SBU, design...

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Bibliographic Details
Published in:CrystEngComm 2013-01, Vol.15 (41), p.8353-8365
Main Authors: Sengupta, Satirtha, Ganguly, Sumi, Goswami, Arijit, Sukul, Pradip K., Mondal, Raju
Format: Article
Language:English
Subjects:
Derivatives
Helical
Helicity
Hydrogen bonds
Ligands
Networks
Photoluminescence
Pyrazole
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Summary:The present work is part of our ongoing quest for a robust and reproducible noncluster-type secondary building unit (SBU) using pyrazole based ditopic ligands and benzene polycarboxylic acids. We report here the construction of a series of Zn(ii) coordination polymers using a tailor-made SBU, designed with the proper utilization of the hydrogen bonds of a pyrazole-based ligand 4,4'-methylene-bispyrazole (H sub(2)MBP) and isophthalic acid (H sub(2)IPA), and its derivatives (R-H sub(2)IPA; R = OH, OCH sub(3), CH sub(3), tBu, Br, I, NH sub(2), N sub(3)). The results demonstrate that the substituent effect of R-isophthalates does play a decisive role in directing the structural assemblies of this system. One of the promising features of the 2D networks of this series is the presence of SBU-based helical motifs, which by and large remain elusive despite the plethora of reports on various SBU based networks. Throughout the series, hydrogen bonds, pi - pi interactions and other intermolecular interactions play a crucial role in stabilizing the resulting networks. Furthermore, some of these complexes exhibit some interesting photoluminescent properties in the solid state.
ISSN:1466-8033
1466-8033
DOI:10.1039/c3ce40904j