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Linkage induced enhancement of fluorescence in metal-carbene bond directed metallacycles and metallacages

Purba, Prioti Choudhury and Bhattacharyya, Soumalya and Maity, Manoranjan and Mukhopadhyay, Sujay and Howlader, Prodip and Mukherjee, Partha Sarathi (2019) Linkage induced enhancement of fluorescence in metal-carbene bond directed metallacycles and metallacages. In: CHEMICAL COMMUNICATIONS, 55 (57). pp. 8309-8312.

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Official URL: https://dx.doi.org/10.1039/c9cc04444b

Abstract

Two new 1,4-dihydropyrrolo3,2-b]pyrrole based aggregation induced emission (AIE)-inactive di- and tetra-imidazolium salts were employed with Ag(i) for the synthesis of a Ag-carbene bond directed metallacycle (1) and metallacage (2), respectively. Transmetalation of these complexes allowed their facile conversion to their respective Au(i)-metallacycle (3) and metallacage (4). The final assemblies exhibit linkage induced enhancement of fluorescence (LIEF). The free ligands are almost non-fluorescent (phi(F) = 3.2, 3.4) in comparison to their metal-carbene counterparts (phi(F) up to 32.0). Thus, without using any AIEgen, obtaining high emission efficiencies in complexes Ag-I-C-NHC (1, 2) via linkage is a nice approach towards turn-on fluorescence.

Item Type: Journal Article
Additional Information: copyright for this article belongs to ROYAL SOC CHEMISTRY
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Depositing User: Id for Latest eprints
Date Deposited: 07 Aug 2019 08:43
Last Modified: 07 Aug 2019 08:43
URI: http://eprints.iisc.ac.in/id/eprint/63364

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