Strong Color Tuning of Self‐Assembled Azo‐Derived Phosphonic Acids upon Hydrogen Bonding

Girard, Pauline; Hémez, Julie; Silvestre, Virginie; Labrugère, Christine; Lartigue, Lénaïc; Duvail, Jean-Luc; Ishow, Eléna

doi:10.1002/cptc.201600014

Cited by 2 publications

(2 citation statements)

References 44 publications

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“…In general, the manipulation of the color output follows various routes. Recently, the popular way toward the goal of multicolor emission was based on stringent control over various experimental conditions, such as preparation method and delicate chemical modification. , However, most of the nonrational design-involved processes are both time- and resource-consuming. Therefore, we look forward to the fluorescent material with colorful emissions, which could be tuned through simple chemical modifications rather than physical mixture.…”

Section: Resultsmentioning

confidence: 99%

Positively Charged Hyperbranched Polymers with Tunable Fluorescence and Cell Imaging Application

Qin

Yang

et al. 2018

ACS Appl. Mater. Interfaces

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Fluorescence-tunable materials are becoming increasingly attractive because of their potential applications in optics, electronics, and biomedical technology. Herein, a multicolor molecular pixel system is realized using a simple copolymerization method. Bleeding of two complementary colors from blue and yellow fluorescence segments reproduced serious multicolor fluorescence materials. Interestingly, the emission colors of the polymers can be fine-tuned in the solid state, solution phase, and in hydrogel state. More importantly, the positive fluorescent polymers exhibited cell-membrane permeable ability and were found to accumulate on the cell nucleus, exhibiting remarkable selectivity to give bright fluorescence. The DNA/RNA selectivity experiments in vitro and in vivo verified that [tris(4-(pyridin-4-yl)phenyl)amine]-[1,8-dibromooctane] has prominent selectivity to DNA over RNA inside cells.

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Section: Resultsmentioning

confidence: 99%

Positively Charged Hyperbranched Polymers with Tunable Fluorescence and Cell Imaging Application

Qin

Yang

et al. 2018

ACS Appl. Mater. Interfaces

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“…Acidic units, like phosphonic and carboxylic ones, could appear among the most attractive promoters of intermolecular H bonds with less stringent orientation criteria compared to amide or urea units [ 18 ] implying adequate mutual organization. Recent studies revealed that the incorporation of phosphonic acid units and especially bisphosphonic ones exerted stiff interactions that fully prohibited photoisomerization in the solid state, [ 19 ] and even provoked intermolecular proton transfer until modifying the absorption properties of the azo compounds. [ 20 ] Curiously, azo molecules comprising carboxylic acid units have rarely been considered as potential photoactuators, presumably due to their tendency to crystallize in the solid state, impairing efficient photomigration, whereas they have been involved in the construction of photoswitchable metal organic frameworks for light harvesting applications.…”

Section: Introductionmentioning

confidence: 99%

Exploiting Light Interferences to Generate Micrometer‐High Superstructures from Monomeric Azo Materials with Extensive Orientational Mobility

Rodríguez

Jelken

Delpouve

et al. 2021

Advanced Optical Materials

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Photochromic azo materials have stirred considerable interest for their ability to mechanically respond to polarized light through large photoinduced migration and orientation processes. In order to apprehend the microscopic dynamics behind the extensive mass transport occurring under interferential illumination, two azo compounds differing by their propensity to form hydrogen bonds are synthesized and processed as nondoped glassy thin films. Interferential irradiation using polarization and intensity patterns reveals fully distinct responses. Regular nanometer‐high surface relief gratings transform into micrometer superstructures with an amplitude ten times higher than the initial film thickness when using the latter polarization. Systematic comparisons between the azo materials in terms of thermal properties, photochromism in solution and in the solid state, and photomigration are carried out. The progressive formation of superstructures is ascribed to two successive processes. The first one relates to fast photoinduced migration due to the impinging structured light, and the second one is promoted by slower thermally activated “zig‐zag”‐like diffusion and Z‐E thermal relaxation, which in turn requests high orientational mobility of the azo compounds and causes large nanomechanical changes. Such studies should provide novel structural guidelines in terms of material fluidity to rapidly achieve highly structured and rewritable materials at low light irradiance.

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Strong Color Tuning of Self‐Assembled Azo‐Derived Phosphonic Acids upon Hydrogen Bonding

Abstract: International audienc

Cited by 2 publications

References 44 publications

Positively Charged Hyperbranched Polymers with Tunable Fluorescence and Cell Imaging Application

Positively Charged Hyperbranched Polymers with Tunable Fluorescence and Cell Imaging Application

Exploiting Light Interferences to Generate Micrometer‐High Superstructures from Monomeric Azo Materials with Extensive Orientational Mobility

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