A terpyridine luminophore: Synthesis, photophysics and selective metal ion�Mediated hydrogelation

Purohit, AK and Behera, SK and Kar, PK (2020) A terpyridine luminophore: Synthesis, photophysics and selective metal ion�Mediated hydrogelation. In: Journal of Molecular Structure, 1205 .

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Abstract

Terpyridine ligands are the fascinating materials for metal co-ordination. A new fluorescent 4-(3,4-dimethoxyphenyl) terpyridine ligand (DMPTP) was synthesized. We have explored the solvent dependent photophysical characteristics and the metal ion mediated hydrogel formation of DMPTP. The optical behavior of DMPTP is studied by UV�Visible, steady state and time resolved fluorescence measurements in different solvents. DMPTP exhibits structured emission in non-polar hexane solution and broad emission in polar DMSO solution. In addition, DMPTP holds a large solvent dependent fluorescence shift. These results indicate DMPTP undergoes intramolecular charge transfer (ICT) in the excited state. The fluorescence lifetimes also corroborated the ICT behavior of DMPTP. Moreover, DMPTP produces hydrogel upon formation of complex with Cu2+ and Zn2+ in 1:1 ratio. The xerogels of Zn2+ and Cu2+complex exhibit fibrous and flake like morphology, respectively. Interestingly, the hydrogel obtained from Zn2+ complex is highly fluorescent and the one obtained from Cu2+ complex is non-fluorescent.

Item Type:	Journal Article
Publication:	Journal of Molecular Structure
Publisher:	ELSEVIER
Additional Information:	Copyright for this article belongs to ELSEVIER
Keywords:	Charge transfer; Excited states; Fluorescence; Hydrogels; Ligands; Metal ions; Metals; Photophysics; Solvents; Zinc compounds, Fluorescence lifetimes; Fluorescence shifts; Hydrogel formation; Intramolecular charge transfers; Photophysical characteristics; Solvatochromisms; Terpyridines; Time-resolved fluorescence measurements, Copper compounds
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	29 Jun 2020 10:41
Last Modified:	29 Jun 2020 10:41
URI:	http://eprints.iisc.ac.in/id/eprint/64783

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