Pt(II) Tetrafacial Barrel with Aggregation-Induced Emission for Sensing

Sainaba, AB and Saha, R and Venkateswarulu, M and Zangrando, E and Mukherjee, PS (2024) Pt(II) Tetrafacial Barrel with Aggregation-Induced Emission for Sensing. In: Inorganic Chemistry, 63 (1). pp. 508-517.

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Abstract

A new tetraphenylpyrazine-based tetraimidazole ligand (L) was synthesized and used for subcomponent self-assembly with cis-(tmeda)Pd(NO3)2 and cis-Pt(PEt3)2(OTf)2, leading to the formation of two tetrafacial barrels Pd8L4(tmeda)8(NO3)16 (1) and Pt8L4(PEt3)16(OTf)16 (2), respectively. Although ligand L is aggregation-induced emission (AIE) active, barrel 2 showed a magnificently higher AIE activity than ligand L, while 1 failed to retain the AIE properties of the ligand. Pd(II) barrel 1, undergoing an aggregation-caused quenching (ACQ) phenomenon, nullified the AIE activity of the ligand to be used in the photophysical application. The enhanced emission in the aggregated state of Pt(II) barrel 2 was used for the recognition of picric acid (PA), which is explosive in nature and one of the groundwater contaminants in landmine areas. The recognition of picric acid was found to be selective in comparison with that of other nitroaromatic compounds (NACs), which could be attributed to ground-state complex formation and resonance energy transfer between picric acid and barrel 2. The use of new AIE-active assembly 2 for selective detection of PA with a low detection limit is noteworthy. © 2023 American Chemical Society

Item Type:	Journal Article
Publication:	Inorganic Chemistry
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to Author.
Keywords:	Aromatic compounds; Energy transfer; Explosives; Ground state; Groundwater; Groundwater pollution; Palladium compounds; Platinum compounds, Aggregation-induced emissions; Emission properties; Enhanced Emission; Groundwater contaminants; Landmine; Nitroaromatic compound; Photophysical; Picric acid; Quenching phenomena; Synthesised, Ligands, aromatic nitro compound; ground water; picric acid, aggregation-induced emission; article; Asthma Control Questionnaire; complex formation; controlled study; drug analysis; energy transfer; female; landmine; limit of detection
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	01 Mar 2024 08:59
Last Modified:	01 Mar 2024 08:59
URI:	https://eprints.iisc.ac.in/id/eprint/83941

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