Jump to main content
Jump to site search


Structural diversity of Zn(II) based coordination polymers constructed from a flexible carboxylate linker and pyridyl co-linkers: fluorescence sensing of nitroaromatics

Author affiliations

Abstract

The flexible carboxylate linker, H3L = 5-(2-carboxybenzyloxy)isophthalic acid, and a group of N-donor co-linkers such as 1,2-di(4-pyridyl)ethylene (dpe), 1,2-di(4-pyridyl)ethane (1,2-dpe), 1,2-di(pyridin-4-yl)diazene (dpd), and 1,3-di(4-pyridyl)propane (1,3-dpp), give rise to five new coordination polymers (CPs) with Zn(II) ions. These are {[Zn2(L)(μ-OH)(dpe)(H2O)]}n (1), {[Zn(L)(1,2-dpe)1.5]·H2O}n (2), {[Zn(HL)(dpd)1.5]2·2(H2O)}n (3), {[Zn(HL)(1,3-dpp)]}n (4), and {[Zn5(L)4(H2O)2]·8(H2O) (1,2-dpe)}n (5). CP 1 forms a densely packed 3D framework with a rare topological type, ose; 7/3/o5; sqc59. Both CP 2 and 3 form [2+2] metallacyclic units which form a 1D chain that links other chains by strong O–H⋯N type H-bonding to result in a 3D supramolecular network. CP 4 forms a 2D sheet structure stacking over each other by C–H⋯π and π⋯π interactions, to give rise to a 3D H-bonded supramolecular structure with topological type, sql/Shubnikov. CP 5 has two types of SBUs with a 3D anionic network where channels are filled up with the cationic 1,2-dpe ligands and water molecules which shows rare topological type, 6,10T9. The photoluminescence sensing of nitroaromatic compounds, especially 2,4,6-trinitrophenol (TNP), by 1–5 indicates that these CPs could be potential candidates for developing luminescent sensors for selective sensing of these species.

Graphical abstract: Structural diversity of Zn(ii) based coordination polymers constructed from a flexible carboxylate linker and pyridyl co-linkers: fluorescence sensing of nitroaromatics

Back to tab navigation

Supplementary files

Publication details

The article was received on 20 Jul 2017, accepted on 25 Sep 2017 and first published on 26 Sep 2017


Article type: Paper
DOI: 10.1039/C7NJ02651J
Citation: New J. Chem., 2017, Advance Article
  •   Request permissions

    Structural diversity of Zn(II) based coordination polymers constructed from a flexible carboxylate linker and pyridyl co-linkers: fluorescence sensing of nitroaromatics

    A. K. Gupta, K. Tomar and P. K. Bharadwaj, New J. Chem., 2017, Advance Article , DOI: 10.1039/C7NJ02651J

Search articles by author

Spotlight

Advertisements