Issue 31, 2017

Dual emission and multi-stimuli-response in iridium(iii) complexes with aggregation-induced enhanced emission: applications for quantitative CO2 detection

Abstract

Four new Ir(III) complexes with the general formula [IrHCl(C^N)(PPh3)2] containing different conjugated Schiff base ligands (C^N) have been synthesized and characterized by 1H, 13C, and 31P NMR, HRMS, and IR spectra and one of them by single crystal X-ray diffraction. Their photophysical properties in solution and in the solid state have been analyzed and three main practical results have been obtained: (i) a dual fluorescent and phosphorescent emissive complex in solution, (ii) successful acid/base sensing in the solid state and (iii) quantitative CO2 detection. Quantum chemical calculations have been employed to assign the character of the lowest excited states. A plausible explanation for the observed aggregation induced enhanced emission (AIEE) is given, based on the restriction of intramolecular motions due to the effect of intermolecular C–H⋯π and C–H⋯Cl type interactions upon aggregation.

Graphical abstract: Dual emission and multi-stimuli-response in iridium(iii) complexes with aggregation-induced enhanced emission: applications for quantitative CO2 detection

Supplementary files

Article information

Article type
Paper
Submitted
22 May 2017
Accepted
06 Jul 2017
First published
10 Jul 2017
This article is Open Access
Creative Commons BY license

J. Mater. Chem. C, 2017,5, 7784-7798

Dual emission and multi-stimuli-response in iridium(III) complexes with aggregation-induced enhanced emission: applications for quantitative CO2 detection

C. Climent, P. Alam, S. S. Pasha, G. Kaur, A. R. Choudhury, I. R. Laskar, P. Alemany and D. Casanova, J. Mater. Chem. C, 2017, 5, 7784 DOI: 10.1039/C7TC02250F

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