Academic literature on the topic 'Mechano-chromism'

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Journal articles on the topic "Mechano-chromism"

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Botta, Chiara, Sara Benedini, Lucia Carlucci, Alessandra Forni, Daniele Marinotto, Andrea Nitti, Dario Pasini, Stefania Righetto, and Elena Cariati. "Polymorphism-dependent aggregation induced emission of a push–pull dye and its multi-stimuli responsive behavior." Journal of Materials Chemistry C 4, no. 14 (2016): 2979–89. http://dx.doi.org/10.1039/c5tc03352g.

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Yu, Xia, Yuzhang Meng, Hao Zhang, Junbo Guo, Shixian Wang, Hui Li, Jun Hu, and Min-Hui Li. "Trans/cis-stereoisomers of triterpenoid-substituted tetraphenylethene: aggregation-induced emission, aggregate morphology, and mechano-chromism." Nanoscale, 2021. http://dx.doi.org/10.1039/d1nr04353f.

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Pure trans- and cis-TPE-2GA isomers have been successfully synthesized and characterized, which not only possessed thermally stability and photoisomerization ability, but also exhibited different AIE, self-assembly, and mechano-chromic properties.
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Oda, Kasane, Hiroki Nishiyama, Jun-ichi Nishida, and Takeshi Kawase. "9,9‐Bis[4‐(N‐aryl)phenyl]methylidene‐xanthylidene Derivatives Displaying Mechano‐, Crystallo‐ and Thermo‐chromism." ChemPlusChem, November 29, 2022. http://dx.doi.org/10.1002/cplu.202200360.

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Dissertations / Theses on the topic "Mechano-chromism"

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Benoot, Nicolas. "Self-assembly of hybrid microgels for interferential and responsive photonic applications." Electronic Thesis or Diss., Pau, 2020. http://www.theses.fr/2020PAUU3047.

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Dans le milieu des produits cosmétiques et de soins pour la peau, il existe un réel besoin d’innovation pour trouver de nouveaux matériaux sans impact sur le consommateur et l’environnement. Dans une démarche bio-inspirée, les couleurs dites « physiques » offrent une nouvelle voie de création de couleurs sans pigments inorganiques. En effet, aujourd’hui les pigments minéraux sont la principale source de coloration pour les applications cosmétiques et leur remplacement représente un enjeu critique pour limiter une éventuelle exposition à de potentielles nanoparticules.Sensible à cet enjeu, LVMH Recherche s’est investi avec l’IPREM pour concevoir une solution issue de l’auto-assemblage de micro-hydrogels, dits microgels, aux multiples propriétés stimulables, pour produire de la couleur sans pigments.Ces microgels, dispersés dans l’eau, ont la capacité de s’organiser spontanément lors de l’évaporation du solvant pour produire des assemblages très réguliers. Ces assemblages périodiques, assimilés à des « cristaux colloïdaux » interfère avec la lumière visible et peuvent conduire à des phénomènes de diffraction. La diffraction de la lumière visible par les cristaux colloïdaux entraine une coloration dite « physique ».Les travaux de ce projet de thèse s’intéressent à la conception de microgels hybrides pour exalter ses propriétés photoniques et aboutir à la formation de films après séchage dont les couleurs puissent être modifiées par un stimulus. Le manuscrit présente d’abord le contexte scientifique dans lequel s’inscrivent ces travaux avant d’aborder la démarche de synthèse entreprise. Dans un second temps, les propriétés photoniques et stimulables sont discutées en lien avec les organisations 3D des microgels au sein du film. Pour finir, les efforts pour transposer cette technologie dans une formulation cosmétique sont présentés
In the world of cosmetics and skin care products, there is a real need for innovation to find new materials with no impact on the consumer and the environment. In a bio-inspired approach, so-called "physical" colors offer a new way of creating colors without inorganic pigments. Indeed, today mineral pigments are the main source of coloring for cosmetic applications and their replacement represents a critical issue to limit possible exposure to potential nanoparticles.Sensitive to this challenge, LVMH Research worked with IPREM to design a solution resulting from the self-assembly of micro-hydrogels, known as microgels, with multiple stimulable properties, to produce color without pigments.These microgels, dispersed in water, have the capacity to spontaneously organize themselves during the evaporation of the solvent to produce very regular assemblies. These periodic assemblages, assimilated to "colloidal crystals", interfere with visible light and can lead to diffraction phenomena. The diffraction of visible light by the colloidal crystals leads to a so-called "physical" coloration.The work of this thesis project focuses on the design of hybrid microgels to enhance its photonic properties and lead to the formation of films after drying whose colors can be modified by a stimulus. The manuscript first presents the scientific context in which this work is carried out before discussing the synthesis process undertaken. In a second step, the photonic and stimulable properties are discussed in relation to the 3D organization of microgels within the film. Finally, efforts to transpose this technology into a cosmetic formulation are presented
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Huang, Yi-Hsuan, and 黃亦萱. "Studies on the Mechano- and Vapo-chromism and Mechanofluoromemory of Positional Isomers of Di-pentiptycenyl Anthracenes." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/yuayzm.

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碩士
國立臺灣大學
化學研究所
105
Recently, we found that when a common planar chromophore like anthracene is substituted with the pentiptycenyl groups the resulting compound has the mechanofluorochromic (MFC), vapofluorochromic (VFC) and mechanofluorochromy (MFM) properties. We believe that the bulky pentitpycene groups prevent strong intermolecular interactions, which tend to make the system polymorphic and switchable by external mechano-stimuli. To further understand the mechanism of this system, we have investigated its position isomers, including 1,4-, 1,5-, 1,8- and 2,6- dipentiptcenylanthracene. The fluorescence spectra and time-dependent emission intensity were measured to compare their MFC and VFC properties by powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy.
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