Photo-responsive spiropyran monolayer protected gold nanorod

Cao, Jingjing; Wu, Shuaifan; Zhai, Baoqi; Wang, Qiaochun; Li, Jing; Ma, Xiang

doi:10.1016/j.dyepig.2013.11.017

Cited by 16 publications

(4 citation statements)

References 51 publications

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“…232 Photochromes like spiropyrans (SPs), azobenzene, diazonaphthoquinone (DNQ), O-nitrobenzyl and coumarin have been used a lot in order to make light responsive polymers. 19,[232][233][234][235][236][237] 4.4.1. Spiropyran based photoresponsive polymer.…”

Section: Photoresponsive Polymeric Nanoparticlesmentioning

confidence: 99%

Trigger responsive polymeric nanocarriers for cancer therapy

et al. 2015

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Conventional chemotherapy for the treatment of cancer has limited specificity when administered systemically and is often associated with toxicity issues. Enhanced accumulation of polymeric nanocarriers at a tumor site may be achieved by passive and active targeting. Incorporation of trigger responsiveness into these polymeric nanocarriers improves the anticancer efficacy of such systems by modulating the release of the drug according to the tumor environment. Triggers used for tumor targeting include internal triggers such as pH, redox and enzymes and external triggers such as temperature, magnetic field, ultrasound and light. While internal triggers are specific cues of the tumor microenvironment, external triggers are those which are applied externally to control the release. This review highlights the various strategies employed for the preparation of such trigger responsive polymeric nanocarriers for cancer therapy and provides an overview of the state of the art in this field.

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Section: Photoresponsive Polymeric Nanoparticlesmentioning

confidence: 99%

Trigger responsive polymeric nanocarriers for cancer therapy

et al. 2015

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“…[ 12,15–17 ] In addition, a careful choice of substituents allows for the regulation of the thermal stability of the MC form, the absorption wavelength, and their photostability as well as the robustness to hydrolysis. [ 14,17 ] Due to these versatile features, SPs were widely used for the construction of responsive materials including polymers, [ 17–19 ] gels, [ 20–23 ] thin films [ 24 ] or monolayers, [ 25,26 ] small‐molecule assemblies, [ 27,28 ] biohybrid system [ 29 ] and porous materials. [ 30–39 ] The development of porous solids capable of reversibly interconverting between two or more states in response to one or more stimuli offers opportunities to manipulate noninvasively the properties of the material enabling new functions with the advantage of broad flexibility with the choice of the applied stimulus.…”

Section: Introductionmentioning

confidence: 99%

“…gels, [20][21][22][23] thin films [24] or monolayers, [25,26] small-molecule assemblies, [27,28] biohybrid system [29] and porous materials. [30][31][32][33][34][35][36][37][38][39] The development of porous solids capable of reversibly interconverting between two or more states in response to one or more stimuli offers opportunities to manipulate noninvasively the properties of the material enabling new functions with the advantage of broad flexibility with the choice of the applied stimulus.…”

Section: Introductionmentioning

confidence: 99%

Construction of Multi‐Stimuli Responsive Highly Porous Switchable Frameworks by In Situ Solid‐State Generation of Spiropyran Switches

Sheng,

Perego,

Bracco

et al. 2023

Advanced Materials

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Stimuli‐responsive molecular systems supported within permanently porous materials offer the opportunity to host dynamic functions operating multifunctional smart materials. However, the construction of highly porous frameworks featuring external‐stimuli responsiveness, for example by light excitation, is still in its infancy. Here we present a general strategy to construct spiropyran‐functionalized highly porous switchable aromatic frameworks (PSFs) by modular and high‐precision anchoring of molecular hooks and an innovative in‐situ solid‐state grafting approach. Three spiropyran‐grafted frameworks bearing distinct functional groups exhibiting various stimuli‐responsiveness were generated by two‐step post‐solid‐state synthesis of a parent indole‐based material. The quantitative transformation and preservation of high porosity were demonstrated by spectroscopic and gas adsorption techniques. For the first time, we provide a highly efficient strategy to construct multi‐stimuli‐responsive, yet structurally robust, spiropyran materials with high pore capacity which was proved essential for the reversible and quantitative isomerization in the bulk as demonstrated by solid‐state NMR spectroscopy. The overall strategy allowed to construct dynamic materials which undergo reversible transformation of spiropyran to zwitterionic merocyanine, by chemical and physical stimulation, showing potential for pH active control, responsive gas uptake and release, contaminant removal, and water harvesting.This article is protected by copyright. All rights reserved

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“…83 was used for preparing photochromic Au-nanorods via the strong covalent S-Au bond [121]. These nanoparticles were very stable in organic solvents without any aggregations or decomposition.…”

Section: Scheme 83mentioning

confidence: 99%

Nanophotochromism

Barachevsky¹

2015

Organic Photonics and Photovoltaics

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Abstract:The review presents the state-of-the-art analysis of investigations in the field of a new line of research of photochromism -nanophotochromism. The design, properties, and possible applications of photochromic nanoparticles prepared by different methods with the use of photochromic substances (aggregates, host-guest, and polymer systems, solid nanoparticles) as well as core-shell photochromic nanostructures based on polymers, silica, quantum dots, doped upconversion nanocrystals, and Ag, Au, etc. nanoparticles have been reviewed. Keywords: photochromism; photochromic nanoparticles; core-shell photochromic nanoparticles design; photoswitching; aggregates; polymer systems, host-guest systems IntroductionPhotochromism is a very important phenomenon for different applications in photonics. The applications are based on reversible phototransformations of photochromic compounds between two states and changes of their properties that accompany these transformations At present, systems and materials containing photochromic nanopatricles have become highly significant. Among these are nanodimensional particles of photochromic substances, including aggregates, and coreshell systems. As a core, inorganic nanoparticles of gold, silver, metal oxides, quantum dots (QD), and also polymeric nanoparticles are used. The shell consists of photochromic molecules or their aggregates connected to a core surface either chemically or physically. Photochromic nanoparticles with photocontrolled fluorescence arouse a special interest because the fluorescence technique is becoming a leading strategy in biological diagnosis, imaging, and detection applications. This paper is a state-of-the-art review which presents results of studying photochromic nanoparticles including author's own data. The results of earlier research are also surveyed in some other reviews [1][2][3][4][5][6][7][8][9][10][11][12][13]. Photochromic nanoparticles:properties and applications Nanoparticles based on photochromic substances AggregatesThe most known photochromic nanoparticles are aggregates of photochromic organic compounds [14]. These compounds experience reversible photoinduced transformations between two states, Sch. 1A and Sch. 1B. Scheme 1The photoinduced colored merocyanine form B absorbing visible irradiation is formed from a colorless form A as a result of photodissociation of the -C-O-bond of the pyran heterocycle under UV radiation, and this is followed by spontaneous isomerization of the cis-form to the trans one. The colored form B can be converted back to the initial colorless form A upon absorption of visible light or spontaneously during the dark relaxation, which is accelerated by heating.The J-aggregates of nitro-substituted indoline spiropyrans Sch. 2 with long alkyl substituents are of special interest [15].The narrow absorption bands of J-aggregates of these photochromic compounds (Fig. 1) made it possible prepare a specimen of the multilayered optical disk providing freUnauthenticated Download

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Photo-responsive spiropyran monolayer protected gold nanorod

Cited by 16 publications

References 51 publications

Trigger responsive polymeric nanocarriers for cancer therapy

Trigger responsive polymeric nanocarriers for cancer therapy

Construction of Multi‐Stimuli Responsive Highly Porous Switchable Frameworks by In Situ Solid‐State Generation of Spiropyran Switches

Nanophotochromism

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