Synthesis of an aggregation-induced emission (AIE) active salicylaldehyde based Schiff base: study of mechanoluminescence and sensitive Zn(<scp>ii</scp>) sensing

Pasha, Sheik Saleem; Yadav, Hare Ram; Choudhury, Angshuman Roy; Laskar, Inamur Rahaman

doi:10.1039/c7tc03046k

Cited by 75 publications

(30 citation statements)

References 62 publications

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“…[239][240] Furthermore, an AIE-active molecule showing both ML and Zn 2+ -sensitive emission was reported by Laskar et al This multifunctional material selectively exhibited turn-on emission in a solution containing Zn 2+ ions with a detection limit of 0.064 ppm (Figure 10c). [241] Nevertheless, research on ML materials with multiple sensing functions is still in the early stage, with only a few reports in recent years. In addition to exploring new materials, integrating them into multifunctional sensors to achieve distinguishable responses to different external stimuli is also an important topic.…”

Section: Toward Multifunctional Sensingmentioning

confidence: 99%

Mechanoluminescence Rebrightening the Prospects of Stress Sensing: A Review

2021

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Mechanoluminescence (ML) is the emission of light when a solid material is subjected to stress. [8][9] The intensity of the ML shows a strong correlation with the applied stress, making it suitable for stress sensing. ML stress sensing is based on a unique transduction principle from stress to photons, which paves the way for advanced stress sensing. In particular, ML-based sensing shows significant advantages of distributed detection and remote response to an applied stress by virtue of photon transmission through space. In addition, excellent stretchability, biocompatibility, and self-powering ability can be achieved within the stress-tophoton transduction units since electronic conduction is not needed. Importantly, ML-based sensing enables compensation of the shortcomings of conventional sensing technologies for emerging applications. Considering the many extraordinary performance characteristics, ML may hopefully rebrighten the prospects of stress sensing.Over the past few decades, ML materials and ML-based stress sensing have been extensively studied. Great efforts have been made to develop a large number of ML materials, deeply understand the ML mechanism, and boost the potential for stress sensing applications. Several review papers have been devoted to ML and its applications. [10][11][12][13][14][15][16][17] Bunzil and Wong summarized ML materials and stress sensors based on lanthanide compounds. [10] Xie and Li surveyed the progress in ML compounds with a focus on fractoluminescence. [11] An overview of inorganic ML compounds was presented by Feng and Smet, which particularly provides deep insight into the crystal structures and their relation to ML. [12] Additionally, Zhang et al. reviewed inorganic ML compounds, concentrating on their compositions, preparation, characterizations, mechanisms, and applications. [13] However, compared with materials and mechanisms, less attention has been paid to the technical performance of ML-based stress sensing and its relevance to applications. Obviously, reasonable analyses of the up-to-date performance are beneficial for properly assessing the potential for future applications.In this paper, we start with a brief overview of the desired performance characteristics of advanced stress sensing for several new applications (Section 2). The state-of-arts and challenges are highlighted. In Section 3, ML materials, ML-based sensors, and technical features will be discussed in an attempt to comprehensively evaluate ML-based sensing technology andThe emergence of new applications, such as in artificial intelligence, the internet of things, and biotechnology, has driven the evolution of stress sensing technology. For these emerging applications, stretchability, remoteness, stress distribution, a multimodal nature, and biocompatibility are important performance characteristics of stress sensors. Mechanoluminescence (ML)-based stress sensing has attracted widespread attention because of its characteristics of remoteness and having a distributed response to mechanical stimuli...

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Section: Toward Multifunctional Sensingmentioning

confidence: 99%

Mechanoluminescence Rebrightening the Prospects of Stress Sensing: A Review

2021

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“…A metal cation can induce a fluorescence turn-on of the AIE probe dissolved in solution by different mechanisms: primarily, the formation of emissive aggregates (cleavage-triggered aggregation, CTA). In addition, we must consider the restriction of intramolecular motions (chelation-aided rigidification, CAR), the metal-caused blocking of nonradiative pathways (metal-bridged crosslinking, MBC), and the metal-caused blocking of intramolecular motion (coordination-induced complexation; CIC) [ 17 , 20 , 88 , 89 , 90 , 91 , 92 , 93 , 94 , 95 ]. As zinc (II) ion acts as a spectroscopically silent “clip” locking the ligands into an emissive conformation, we expected that the PL response of the L probe toward Zn 2+ could be unique.…”

Section: Resultsmentioning

confidence: 99%

A Novel L-Shaped Fluorescent Probe for AIE Sensing of Zinc (II) Ion by a DR/NIR Response

Diana¹,

Caruso

Gentile

et al. 2021

Molecules

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In the field of optical sensors, small molecules responsive to metal cations are of current interest. Probes displaying aggregation-induced emission (AIE) can solve the problems due to the aggregation-caused quenching (ACQ) molecules, scarcely emissive as aggregates in aqueous media and in tissues. The addition of a metal cation to an AIE ligand dissolved in solution can cause a “turn-on” of the fluorescence emission. Half-cruciform-shaped molecules can be a winning strategy to build specific AIE probes. Herein, we report the synthesis and characterization of a novel L-shaped fluorophore containing a benzofuran core condensed with 3-hydroxy-2-naphthaldehyde crossed with a nitrobenzene moiety. The novel AIE probe produces a fast colorimetric and fluorescence response toward zinc (II) in both in neutral and basic conditions. Acting as a tridentate ligand, it produces a complex with enhanced and red-shifted emission in the DR/NIR spectral range. The AIE nature of both compounds was examined on the basis of X-ray crystallography and DFT analysis.

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“…Schiff-base ligands are good candidates in building zinc sensitive AIEgens. Inamur Rahaman Laskar and coworkers in 2017 [ 127 ] synthesised an RIR undergoing chelate, with J-aggregate in the crystalline phase. The sensor [2-(2-(tritylamino)ethylideneamino) methyl phenol] exhibits irreversible mechanoluminescence with an emission colour change from blue to green upon grinding of the powder sample.…”

Section: The Role Of Zinc (Ii) In Aiegen Chemosensingmentioning

confidence: 99%

Zinc (II) and AIEgens: The “Clip Approach” for a Novel Fluorophore Family. A Review

Diana

Panunzi

2021

Molecules

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Aggregation-induced emission (AIE) compounds display a photophysical phenomenon in which the aggregate state exhibits stronger emission than the isolated units. The common term of “AIEgens” was coined to describe compounds undergoing the AIE effect. Due to the recent interest in AIEgens, the search for novel hybrid organic–inorganic compounds with unique luminescence properties in the aggregate phase is a relevant goal. In this perspective, the abundant, inexpensive, and nontoxic d10 zinc cation offers unique opportunities for building AIE active fluorophores, sensing probes, and bioimaging tools. Considering the novelty of the topic, relevant examples collected in the last 5 years (2016–2021) through scientific production can be considered fully representative of the state-of-the-art. Starting from the simple phenomenological approach and considering different typological and chemical units and structures, we focused on zinc-based AIEgens offering synthetic novelty, research completeness, and relevant applications. A special section was devoted to Zn(II)-based AIEgens for living cell imaging as the novel technological frontier in biology and medicine.

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Synthesis of an aggregation-induced emission (AIE) active salicylaldehyde based Schiff base: study of mechanoluminescence and sensitive Zn(ii) sensing

Abstract: A simple AIE active organic molecule exhibits mechanoluminescence (ML) and turn-on Zn(ii) sensing and the causes behind such properties have been explored.

Cited by 75 publications

References 62 publications

Mechanoluminescence Rebrightening the Prospects of Stress Sensing: A Review

Mechanoluminescence Rebrightening the Prospects of Stress Sensing: A Review

A Novel L-Shaped Fluorescent Probe for AIE Sensing of Zinc (II) Ion by a DR/NIR Response

Zinc (II) and AIEgens: The “Clip Approach” for a Novel Fluorophore Family. A Review

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