2015
DOI: 10.1021/acs.jpclett.5b01090
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Mechanochromic Luminescence of Aggregation-Induced Emission Luminogens

Abstract: Mechanochromic (MC) luminogens have found promising applications in mechanosensors, security papers, and optical storage for their change in emission behaviors in response to mechanical stimuli. Examples on MC luminescent materials are rare before the discovery of MC luminescence in aggregation-induced emission (AIE) luminogens. The twisted conformations of AIE luminogens (AIEgens) with appropriate crystallization capability afford loosely packing patterns, which facilitates their phase transformation in the s… Show more

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Cited by 376 publications
(200 citation statements)
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References 53 publications
(94 reference statements)
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“…While in DMSO-water mixtures of 98 vol% water fraction, the formation of aggregates increases the hydrophobicity of the local environment and excludes the polar solvent molecules, so the emission was blueshifted. As these AIE compounds show morphologydependent emission which will be discussed in the mechanochromism part, [17] the redshifted emission of the forming aggregates suggests their poor crystallinity (or amorphous state) where the molecules were loosely packed and may adopt a more planar conformation, thus showing a redder emission.…”
Section: Photophysical Propertiesmentioning
confidence: 99%
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“…While in DMSO-water mixtures of 98 vol% water fraction, the formation of aggregates increases the hydrophobicity of the local environment and excludes the polar solvent molecules, so the emission was blueshifted. As these AIE compounds show morphologydependent emission which will be discussed in the mechanochromism part, [17] the redshifted emission of the forming aggregates suggests their poor crystallinity (or amorphous state) where the molecules were loosely packed and may adopt a more planar conformation, thus showing a redder emission.…”
Section: Photophysical Propertiesmentioning
confidence: 99%
“…Fluorescent materials with mechanochromic property are highly desirable in the applications of sensors, memory chips, optical storage, security inks, optoelectronic devices, and so forth. [17,19] Therefore, we attempt to investigate the mechanochromism of the new AIEgens IQ-Naph, IQ-DPA, and IQ-TPA. When the as-prepared powders were ground with a pestle on a glass slide, their apparent colors and fluorescent emissions were gradually redshifted and weakened with a large color contrast ( Figure S19, Supporting Information and Figure 4A).…”
Section: Mechanochromismmentioning
confidence: 99%
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“…Depending on the type and phases of AIE luminogens, their optical properties are usually dramatically different. For example, the AIE-active propeller-shaped siloles in amorphous phase show redder and weaker fluorescence than their crystalline counterparts 18 , while the aggregation enhanced emission active amorphous-phased 2-Amino-3-((E)-(4-(diethylamino)benzylidene)amino)maleonitrile (A3MN) exhibits considerably bluer and stronger fluorescence than that of crystal 19 .…”
Section: Introductionmentioning
confidence: 99%
“…[26][27][28][29][30] However, developing reliable design strategies for fabricating mechanofunctional materials is challenging and a cutting edge area of materials science research. 26,27 Mechanochromic luminescent (ML) materials are so named because a change in their luminescence colors can be caused by mechanical stimuli.…”
Section: Introduction To Mechanochromic Luminescencementioning
confidence: 99%