Emissive Platinum(II) Macrocycles as Tunable Cascade Energy Transfer Scaffolds

Acharyya, K and Bhattacharyya, S and Lu, S and Sun, Y and Mukherjee, PS and Stang, PJ (2022) Emissive Platinum(II) Macrocycles as Tunable Cascade Energy Transfer Scaffolds. In: Angewandte Chemie - International Edition, 61 (19).

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Abstract

Developing artificial light-harvesting scaffolds with a cascade energy transfer process is significant for better understanding of photosynthesis. Here, we report 3+3 self-assembled PtII fluorescent macrocycles (3 a and 3 b) as light-harvesting platforms with cascade energy transfer. The PtII macrocycles aggregate into nanospheres and show emission-enhancement characteristics upon increasing water content in acetone medium. These aggregates (3aa and 3ba) serve as energy donors when mixed with the hydrophobic dye Eosin-Y (ESY). In the presence of a second dye, Nile Red (NiR), an unusual sequential two-step energy transfer takes place from the macrocycles to NiR. In this case, ESY acts as a bridge in the relay mode. Additionally, a unique strategy to control such an energy transfer process by tuning the chain length of the alkyl group attached to the periphery of the macrocycles is demonstrated. © 2022 Wiley-VCH GmbH

Item Type:	Journal Article
Publication:	Angewandte Chemie - International Edition
Publisher:	John Wiley and Sons Inc
Additional Information:	The Copyright for this article belongs to the John Wiley and Sons Inc
Keywords:	Acetone; Aggregates; Artificial photosynthesis; Energy harvesting; Energy transfer; Harvesting; Infrared devices; Platinum compounds; Scaffolds, AIE-active; Cascade energy transfers; Energy transfer process; Energy-transfer; Eosin Y; Light-harvesting; Macrocycles; Nile red; PtII macrocycle; Tunables, Self assembly
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	12 May 2022 07:24
Last Modified:	12 May 2022 07:24
URI:	https://eprints.iisc.ac.in/id/eprint/71644

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