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

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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

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Publication details

The article was received on 22 May 2017, accepted on 06 Jul 2017 and first published on 10 Jul 2017


Article type: Paper
DOI: 10.1039/C7TC02250F
Citation: J. Mater. Chem. C, 2017, Advance Article
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    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, Advance Article , DOI: 10.1039/C7TC02250F

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