An AIE-active phosphorescent Ir(<scp>iii</scp>) complex with piezochromic luminescence (PCL) and its application for monitoring volatile organic compounds (VOCs)

Jiang, Yang; Li, Guangfu; Zhu, Dongxia; Su, Zhong‐Min

doi:10.1039/c7tc04066k

Cited by 46 publications

(23 citation statements)

References 39 publications

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“…The intense luminescence coming from supramolecular aggregates triggered the research in the field of mechanochromic and piezochromic fluorescent materials, since the color of the emission could possibly change by external compression or mechanical grinding. Recently, many reports have been published on the effective mechanism of piezochromic fluorescence based on the molecular aggregation state of AIE luminogens [61,62,63,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86].…”

Section: Aie and Mechanochromismmentioning

confidence: 99%

Mechanochromic Fluorescent Polymers with Aggregation-Induced Emission Features

Pucci

2019

Sensors

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Mechanochromic polymers are defined as materials that are able to detect a mechanical stress through an optical output. This feature has evoked a growing interest in the last decades, thanks to the progress of chromogenic molecules whose optical characteristics and chemical functionalities allow their effective insertion in many thermoplastic and thermoset matrices. Among the different types of fluorogenic probes able to detect mechanical solicitations, those with aggregation-induced emission (i.e., AIEgens) have attracted tremendous interest since their discovery in 2001. In the present review, the main principles behind the AIEgens working behavior are introduced along with the current state of knowledge concerning the design and preparation of the derived mechanochromic fluorescent polymers. Examples are provided concerning the most ingenious solution for the preparation of chromogenic materials, starting from different types of commodity plastics or synthetic polymers and combined with the latest AIE technology to provide the most sensitive response to mechanical stress.

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Section: Aie and Mechanochromismmentioning

confidence: 99%

Mechanochromic Fluorescent Polymers with Aggregation-Induced Emission Features

Pucci

2019

Sensors

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“…[23] Many pure organic mechanochromic materials with AIE-activem olecules were thus reported, [24][25][26][27][28][29][30][31] along with organoboron complexes. [32,33] Regarding metal-based compounds that combine AIE and mechanochromic properties, few studies have been reported, with examplesb ased on iridium(III), [34][35][36][37][38][39] cadmium(II), [40] zinc(II), [41,42] and gold(I) [43] complexes.…”

Section: Introductionmentioning

confidence: 99%

Aggregation‐Induced Emission Properties of Copper Iodide Clusters

Utrera-Melero

Mevellec

Gautier

et al. 2019

Chemistry An Asian Journal

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The aggregation‐induced emission (AIE) properties of two different copper iodide clusters have been studied. These two [Cu4I4L4] clusters differ by their coordinated phosphine ligand and the luminescent mechanochromic properties are only displayed by one of them. The two clusters are AIE‐active luminophors that exhibit an intense emission in the visible region upon aggregation. The formed particles present luminescent thermochromism comparable to that of the bulk compounds. The observed AIE properties can be attributed to suppression of nonradiative relaxation of the excited states in a more rigid state, in relation to the large structural relaxation of the excited triplet state. The differences observed in the AIE properties of the two clusters can be related to the different ligands. A correlation between the luminescence mechanochromic properties and the AIE effect is not straightforward, but the formation of “soft” molecular solids is a common characteristic that can explain the photoactive properties of these compounds.

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“…As shown in Figure 10, all of the original nanoaggregate samples had sharp and strong peaks, but the intensity of the peaks decreased or even disappeared after grinding. The result implies that the molecular morphology changed from crystalline to amorphous [30][31][32], and red shift of λ em was attributed to the planarization induced by grinding. AIE molecules usually adopt a twisted configuration due to the steric hindrance between moieties and the formation of intermolecular cavities with a loose packing mode.…”

Section: Journal Of Nanomaterialsmentioning

confidence: 94%

Barbituric Derivative Nanoaggregates with Aggregation-Induced Emission and Mechanofluorochromism

Zhang

You

et al. 2019

Journal of Nanomaterials

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Three new nonplanar barbituric derivatives, named as TTB, TTTB, and TOB, were synthesized. The D-π-A type conjugated compounds showed obvious intramolecular charge transfer (ICT) property, which was evidenced by theoretical calculations and spectral analyses. All of them exhibited aggregation induced emission (AIE) when formed nanoaggregates. These nanoaggregates also showed reversible mechanofluorochromism (MFC). Their red light emission became deep red after grinding and then recovered with dichloromethane fuming. Hence, a strategy to fabricate mechanofluorochromic nanoaggregate phosphors via nonplanar π-skeleton and steric effect was demonstrated, and these nanophosphors possess potentials for mechanosensors and anticounterfeiting technology.

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An AIE-active phosphorescent Ir(iii) complex with piezochromic luminescence (PCL) and its application for monitoring volatile organic compounds (VOCs)

Abstract: A neutral multifunctional dinuclear Ir(iii) complex 1 with a Schiff base bridging ligand is shown to combine aggregation-induced emission (AIE), piezochromic luminescence (PCL) and vapochromism.

Cited by 46 publications

References 39 publications

Mechanochromic Fluorescent Polymers with Aggregation-Induced Emission Features

Mechanochromic Fluorescent Polymers with Aggregation-Induced Emission Features

Aggregation‐Induced Emission Properties of Copper Iodide Clusters

Barbituric Derivative Nanoaggregates with Aggregation-Induced Emission and Mechanofluorochromism

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