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Journal articles on the topic 'Amphiphilic Stimuli'

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Author: Grafiati

Published: 6 September 2023

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1

R. Ramireddy, Rajasekhar, Krishna R. Raghupathi, Diego Amado Torres, and S. Thayumanavan. "Stimuli sensitive amphiphilic dendrimers." New Journal of Chemistry 36, no. 2 (2012): 340. http://dx.doi.org/10.1039/c2nj20879b.

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2

Cretu, Carmen, Loredana Maiuolo, Domenico Lombardo, Elisabeta I. Szerb, and Pietro Calandra. "Luminescent Supramolecular Nano- or Microstructures Formed in Aqueous Media by Amphiphile-Noble Metal Complexes." Journal of Nanomaterials 2020 (October 13, 2020): 1–24. http://dx.doi.org/10.1155/2020/5395048.

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The involvement of metal ions within the self-assembly spontaneously occurring in surfactant-based systems gives additional and interesting features. The electronic states of the metal, together with the bonds that can be established with the organic amphiphilic counterpart, are the factors triggering new photophysical properties. Moreover, the availability of stimuli-responsive supramolecular amphiphile assemblies, able to disassemble in a back-process, provides reversible switching particularly useful in novel approaches and applications giving rise to truly smart materials. In particular, small amphiphiles with an inner distribution, within their molecular architecture, of various polar and apolar functional groups, can give a wide variety of interactions and therefore enriched self-assemblies. If it is joined with the opportune presence and localization of noble metals, whose chemical and photophysical properties are undiscussed, then very interesting materials can be obtained. In this minireview, the basic concepts on self-assembly of small amphiphilic molecules with noble metals are shown with particular reference to the photophysical properties aiming at furnishing to the reader a panoramic view of these exciting problematics. In this respect, the following will be shown: (i) the principles of self-assembly of amphiphiles that involve noble metals, (ii) examples of amphiphiles and amphiphile-noble metal systems as representatives of systems with enhanced photophysical properties, and (iii) final comments and perspectives with some examples of modern applications.

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3

Guo, Wenjuan, Tieshi Wang, Xinde Tang, Qun Zhang, Faqi Yu, and Meishan Pei. "Triple stimuli-responsive amphiphilic glycopolymer." Journal of Polymer Science Part A: Polymer Chemistry 52, no. 15 (May 4, 2014): 2131–38. http://dx.doi.org/10.1002/pola.27222.

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4

Ramireddy, Rajasekhar R., Krishna R. Raghupathi, Diego Amado Torres, and S. Thayumanavan. "ChemInform Abstract: Stimuli Sensitive Amphiphilic Dendrimers." ChemInform 43, no. 22 (May 3, 2012): no. http://dx.doi.org/10.1002/chin.201222243.

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5

Liang, Chunchun, Mengwei Li, and Yulan Chen. "Amphiphilic Diazapyrenes with Multiple Stimuli-Responsive Properties." ACS Applied Materials & Interfaces 13, no. 17 (April 21, 2021): 20698–707. http://dx.doi.org/10.1021/acsami.1c03318.

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6

Klaikherd, Akamol, Chikkannagari Nagamani, and S. Thayumanavan. "Multi-Stimuli Sensitive Amphiphilic Block Copolymer Assemblies." Journal of the American Chemical Society 131, no. 13 (April 8, 2009): 4830–38. http://dx.doi.org/10.1021/ja809475a.

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7

Tsutsumi, Naoki, Akitaka Ito, Azumi Ishigamori, Masato Ikeda, Masayuki Izumi, and Rika Ochi. "Synthesis and Self-Assembly Properties of Bola-Amphiphilic Glycosylated Lipopeptide-Type Supramolecular Hydrogels Showing Colour Changes Along with Gel–Sol Transition." International Journal of Molecular Sciences 22, no. 4 (February 13, 2021): 1860. http://dx.doi.org/10.3390/ijms22041860.

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Supramolecular hydrogels formed by self-assembly of low-molecular-weight amphiphiles (hydrogelators) have attracted significant attention, as smart and soft materials. However, most of the observed stimuli-responsive behaviour of these supramolecular hydrogels are limited to gel–sol transitions. In this study, we present bola-amphiphilic glycosylated lipopeptide-type supramolecular hydrogelators that exhibit reversible thermochromism along with a gel–sol transition. The bola-amphiphiles have mono-, di-, tri- or tetra-phenylalanine (F) as a short peptide moiety. We investigate and discuss the effects of the number of F residues on the gelation ability and the morphology of the self-assembled nanostructures.

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8

Zhang, Xiao-Mei, Kun Guo, Luo-Hao Li, Sheng Zhang, and Bang-Jing Li. "Multi-stimuli-responsive magnetic assemblies as tunable releasing carriers." Journal of Materials Chemistry B 3, no. 29 (2015): 6026–31. http://dx.doi.org/10.1039/c5tb00845j.

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9

Phan, Hien, Vincenzo Taresco, Jacques Penelle, and Benoit Couturaud. "Polymerisation-induced self-assembly (PISA) as a straightforward formulation strategy for stimuli-responsive drug delivery systems and biomaterials: recent advances." Biomaterials Science 9, no. 1 (2021): 38–50. http://dx.doi.org/10.1039/d0bm01406k.

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Stimuli-responsive amphiphilic block copolymers obtained by PISA have emerged as promising nanocarriers for enhancing site-specific and on-demand drug release in response to a range of stimuli such as pH, redox agents, light or temperature.

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10

Lee, Myongsoo, Sun-Ja Lee, and Li-Hong Jiang. "Stimuli-Responsive Supramolecular Nanocapsules from Amphiphilic Calixarene Assembly." Journal of the American Chemical Society 126, no. 40 (October 2004): 12724–25. http://dx.doi.org/10.1021/ja045918v.

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11

Smith, Adam E., Xuewei Xu, and Charles L. McCormick. "Stimuli-responsive amphiphilic (co)polymers via RAFT polymerization." Progress in Polymer Science 35, no. 1-2 (January 2010): 45–93. http://dx.doi.org/10.1016/j.progpolymsci.2009.11.005.

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12

Song, Shasha, Aixin Song, and Jingcheng Hao. "Self-assembled structures of amphiphiles regulated via implanting external stimuli." RSC Adv. 4, no. 79 (2014): 41864–75. http://dx.doi.org/10.1039/c4ra04849k.

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13

Glavas, Lidija, Karin Odelius, and Ann-Christine Albertsson. "Induced redox responsiveness and electroactivity for altering the properties of micelles without external stimuli." Soft Matter 10, no. 22 (2014): 4028–36. http://dx.doi.org/10.1039/c4sm00258j.

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14

Zheng, Ke, Hongyan Liu, Xinxin Liu, Libin Jiang, Linlin Li, Xianggen Wu, Nannan Guo, Caifeng Ding, and Mingdong Huang. "Photo-triggered release of doxorubicin from liposomes formulated by amphiphilic phthalocyanines for combination therapy to enhance antitumor efficacy." Journal of Materials Chemistry B 8, no. 35 (2020): 8022–36. http://dx.doi.org/10.1039/d0tb01093f.

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15

Chen, Xianhui, Yuanyuan Peng, Xiaobo Tao, Guangyan Du, and Quan Li. "Building a quadruple stimuli-responsive supramolecular gel based on a supra-amphiphilic metallogelator." New Journal of Chemistry 45, no. 48 (2021): 22902–7. http://dx.doi.org/10.1039/d1nj04764g.

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16

Du, Zhukang, Xiaolong Yan, Ning Sun, and Biye Ren. "Dual stimuli-responsive nano-structure transition of three-arm branched amphiphilic polymers containing ferrocene (Fc) and azobenzene (Azo) moieties in aqueous solution." Soft Matter 15, no. 43 (2019): 8855–64. http://dx.doi.org/10.1039/c9sm01437c.

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17

Fan, Xiaoshan, Xiaoyuan Wang, Mengya Cao, Chenguang Wang, Zhiguo Hu, Yun-Long Wu, Zibiao Li, and Xian Jun Loh. "“Y”-shape armed amphiphilic star-like copolymers: design, synthesis and dual-responsive unimolecular micelle formation for controlled drug delivery." Polymer Chemistry 8, no. 36 (2017): 5611–20. http://dx.doi.org/10.1039/c7py00999b.

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18

Samoshin, Vyacheslav V. "Fliposomes: stimuli-triggered conformational flip of novel amphiphiles causes an instant cargo release from liposomes." Biomolecular Concepts 5, no. 2 (May 31, 2014): 131–41. http://dx.doi.org/10.1515/bmc-2014-0002.

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AbstractThis review presents a new strategy for the design of stimuli-responsive liposomes for targeted delivery – the construction of a liposome membrane (lipid bilayer) using amphiphiles able to perform a stimuli-triggered conformational flip (‘flipids’). When done simultaneously by a major or significant part of the bilayer molecules, this massive flip disrupts the liposome membrane and induces a rapid release of the liposome load specifically in response to the initial stimulus. The conformational switches incorporated into the amphiphilic molecules could potentially be controlled by various internal or external factors (pH, metal complexation, light, electric field, etc.). Using this concept, we designed a series of pH-triggerable flipids, and prepared and tested ‘fliposomes’ with extraordinary characteristics: high stability in storage and in serum combined with an instant release of their cargo in response to a weakly acidic medium.

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19

Bixenmann, Leon, Judith Stickdorn, and Lutz Nuhn. "Amphiphilic poly(esteracetal)s as dual pH- and enzyme-responsive micellar immunodrug delivery systems." Polymer Chemistry 11, no. 13 (2020): 2441–56. http://dx.doi.org/10.1039/c9py01716j.

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20

Lv, Yisheng, Liquan Wang, Fan Liu, Weisheng Feng, Jie Wei, and Shaoliang Lin. "Self-assembly of amphiphilic alternating copolymers with stimuli-responsive rigid pendant groups." Polymer Chemistry 11, no. 29 (2020): 4798–806. http://dx.doi.org/10.1039/d0py00765j.

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21

Li, Junfeng, Chenglong Yang, Ying Chen, and Wen-Yong Lai. "A self-assembling amphiphilic perylene bisimide and its application for WORM memory devices." New Journal of Chemistry 40, no. 10 (2016): 8886–91. http://dx.doi.org/10.1039/c6nj01997h.

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22

Pan, Weidong, Huanhuan Liu, Hongcan Zhang, and Youliang Zhao. "Synthesis and properties of an acid-labile dual-sensitive ABCD star quaterpolymer." Polymer Chemistry 7, no. 16 (2016): 2870–81. http://dx.doi.org/10.1039/c6py00267f.

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23

Ueda, Motoki, Akihiro Uesaka, and Shunsaku Kimura. "Selective disruption of each part of Janus molecular assemblies by lateral diffusion of stimuli-responsive amphiphilic peptides." Chemical Communications 51, no. 9 (2015): 1601–4. http://dx.doi.org/10.1039/c4cc08686d.

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24

Yang, Jiangyan, Jialin Wang, Yijiang Liu, Huaming Li, and Zhiqun Lin. "Stimuli-responsive Janus mesoporous nanosheets towards robust interfacial emulsification and catalysis." Materials Horizons 7, no. 12 (2020): 3242–49. http://dx.doi.org/10.1039/d0mh01260b.

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Stimuli-responsive amphiphilic Janus mesoporous nanosheets with pH-triggered emulsification performance, switchable catalytic activity in aqueous solution and oil-phase-type-dependent catalytic activity at an emulsion interface were crafted.

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25

Kamiya, Noriho, Yoshiaki Shiotari, Masamichi Tokunaga, Hideshi Matsunaga, Hirokazu Yamanouchi, Koji Nakano, and Masahiro Goto. "Stimuli-responsive nanoparticles composed of naturally occurring amphiphilic proteins." Chemical Communications, no. 35 (2009): 5287. http://dx.doi.org/10.1039/b909897f.

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26

Xu, Chen, Xuefeng Fu, Michael Fryd, Song Xu, Bradford B. Wayland, Karen I. Winey, and Russell J. Composto. "Reversible Stimuli-Responsive Nanostructures Assembled from Amphiphilic Block Copolymers." Nano Letters 6, no. 2 (February 2006): 282–87. http://dx.doi.org/10.1021/nl052332d.

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27

Yamanaka, Masamichi, Nana Haraya, and Sachiyo Yamamichi. "Chemical Stimuli-Responsive Supramolecular Hydrogel from Amphiphilic Tris-Urea." Chemistry - An Asian Journal 6, no. 4 (February 17, 2011): 1022–25. http://dx.doi.org/10.1002/asia.201000791.

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28

Liu, Xiaochi, Ding Hu, Ziwen Jiang, Jiaming Zhuang, Yisheng Xu, Xuhong Guo, and S. Thayumanavan. "Multi-Stimuli-Responsive Amphiphilic Assemblies through Simple Postpolymerization Modifications." Macromolecules 49, no. 17 (August 16, 2016): 6186–92. http://dx.doi.org/10.1021/acs.macromol.6b01397.

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29

Xu, Yiting, Jie Cao, Qi Li, Jilu Li, Kaiwei He, Tong Shen, Xinyu Liu, Conghui Yuan, Birong Zeng, and Lizong Dai. "Correction: Novel azobenzene-based amphiphilic copolymers: synthesis, self-assembly behavior and multiple-stimuli-responsive properties." RSC Advances 8, no. 32 (2018): 17878. http://dx.doi.org/10.1039/c8ra90036a.

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30

Mohammad, Sk Arif, Devendra Kumar, Md Mehboob Alam, and Sanjib Banerjee. "Ultrafast, green and recyclable photoRDRP in an ionic liquid towards multi-stimuli responsive amphiphilic copolymers." Polymer Chemistry 12, no. 34 (2021): 4954–60. http://dx.doi.org/10.1039/d1py01014j.

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A simple and inexpensive method for ultrafast and recyclable photoRDRP in an ionic liquid is developed, yielding low dispersity poly(glycidyl methacrylate) and well-defined amphiphilic multi-stimuli responsive diblock copolymers thereof.

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31

Wendler, Felix, Jessica C. Tom, and Felix H. Schacher. "Synthesis and self-assembly of photoacid-containing block copolymers based on 1-naphthol." Polymer Chemistry 10, no. 41 (2019): 5602–16. http://dx.doi.org/10.1039/c9py01131e.

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Photoacids experience a strong increase in acidity when absorbing light and, hence, can be considered as molecular switches. The incorporation into amphiphilic block copolymers leads to novel stimuli-responsive materials with great potential.

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32

Liu, JianCheng, Christina Uhlir, Parag K. Shah, Fang Sun, and Jeffrey W. Stansbury. "Controlled nanogel and macrogel structures from self-assembly of a stimuli-responsive amphiphilic block copolymer." RSC Advances 6, no. 69 (2016): 64791–98. http://dx.doi.org/10.1039/c6ra03933b.

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33

Waku, Tomonori, Naoyuki Hirata, Masamichi Nozaki, Kanta Nogami, Shigeru Kunugi, and Naoki Tanaka. "Morphological Transformation of Peptide Nanoassemblies through Conformational Transition of Core-forming Peptides." Polymers 11, no. 1 (December 28, 2018): 39. http://dx.doi.org/10.3390/polym11010039.

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Morphological control of nanostructures that are composed of amphiphilic di- or tri-block molecules by external stimuli broadens their applications for molecular containers, nanoreactors, and controlled release materials. In this study, triblock amphiphiles comprising oligo(ethylene glycol), oligo(l-lysine), and tetra(l-phenylalanine) were prepared for the construction of nanostructures that can transform accompanying α-to-β transition of core-forming peptides. Circular dichroic (CD) measurements showed that the triblock amphiphiles adopted different secondary structures depending on the solvent environment: they adopt β-sheet structures in aqueous solution, while α-helix structures in 25% 2,2,2-trifluoroethanol (TFE) solution under basic pH conditions. Transmission electron microscopic (TEM) observation revealed that the triblock amphiphiles formed vesicle structures in 25% TFE aq. Solvent exchange from 25% TFE to water induced morphological transformation from vesicles to arc-shaped nanostructures accompanying α-β conformational transition. The transformable nanostructures may be useful as novel smart nanomaterials for molecular containers and micro reactors.

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34

Zhou, Xiaoteng, Lingxiao Li, He Qin, Bo Ning, Junpei Li, and Chengyou Kan. "Controlled self-assembly into diverse stimuli-responsive microstructures: from microspheres to branched cylindrical micelles and vesicles." RSC Advances 8, no. 38 (2018): 21613–20. http://dx.doi.org/10.1039/c8ra03374a.

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35

Singh, Vandana, Yadavali Siva Prasad, Arun Kumar Rachamalla, Vara Prasad Rebaka, Tohira Banoo, C. Uma Maheswari, Vellaisamy Sridharan, Krishnamoorthy Lalitha, and Subbiah Nagarajan. "Hybrid hydrogels derived from renewable resources as a smart stimuli responsive soft material for drug delivery applications." RSC Advances 12, no. 4 (2022): 2009–18. http://dx.doi.org/10.1039/d1ra08447j.

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36

Hussain, Hazrat, Elkin Amado, and Jörg Kressler. "Functional Polyether-based Amphiphilic Block Copolymers Synthesized by Atom-transfer Radical Polymerization." Australian Journal of Chemistry 64, no. 9 (2011): 1183. http://dx.doi.org/10.1071/ch11147.

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This review deals with the synthesis, physical properties, and applications of amphiphilic block copolymers based on hydrophilic poly(ethylene oxide) (PEO) or hydrophobic poly(propylene oxide) (PPO). Oligomeric PEO and PPO are frequently functionalized by converting their OH end groups into macroinitiators for atom-transfer radical polymerization. They are then used to generate additional blocks as part of complex copolymer architectures. Adding hydrophobic and hydrophilic blocks, respectively, leads to polymers with amphiphilic character in water. They are surface active and form micelles above a critical micellization concentration. Together with recent developments in post-polymerization techniques through quantitative coupling reactions (‘click’ chemistry) a broad variety of tailored functionalities can be introduced to the amphiphilic block copolymers. Examples are outlined including stimuli responsiveness, membrane penetrating ability, formation of multi-compartmentalized micelles, etc.

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37

Fernandez-Alvarez, Roberto, Eva Hlavatovičová, Krzysztof Rodzeń, Adam Strachota, Sami Kereïche, Pavel Matějíček, Justo Cabrera-González, Rosario Núñez, and Mariusz Uchman. "Synthesis and self-assembly of a carborane-containing ABC triblock terpolymer: morphology control on a dual-stimuli responsive system." Polymer Chemistry 10, no. 22 (2019): 2774–80. http://dx.doi.org/10.1039/c9py00518h.

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38

Vlasov, Sergei S., Pavel S. Postnikov, Mikhail V. Belousov, Sergei V. Krivoshchekov, Mekhman S. Yusubov, Artem M. Guryev, and Antonio Di Martino. "Multiresponsive Hybrid Microparticles for Stimuli-Responsive Delivery of Bioactive Compounds." Applied Sciences 10, no. 12 (June 24, 2020): 4324. http://dx.doi.org/10.3390/app10124324.

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Hybrid microparticles based on an iron core and an amphiphilic polymeric shell have been prepared to respond simultaneously to magnetic and ultrasonic fields and variation in the surrounding pH to trigger and modulate the delivery of doxorubicin. The microparticles have been developed in four steps: (i) synthesis of the iron core; (ii) surface modification of the core; (iii) conjugation with the amphiphilic poly(lactic acid)-grafted chitosan; and (iv) doxorubicin loading. The particles demonstrate spherical shape, a size in the range of 1–3 µm and surface charge that is tuneable by changing the pH of the environment. The microparticles demonstrate good stability in simulated physiological solutions and are able to hold up to 400 µg of doxorubicin per mg of dried particles. The response to ultrasound and the changes in the shell structure during exposure to different pH levels allows the control of the burst intensity and release rate of the payload. Additionally, the magnetic response of the iron core is preserved despite the polymer coat. In vitro cytotoxicity tests performed on fibroblast NIH/3T3 demonstrate a reduction in the cell viability after administration of doxorubicin-loaded microparticles compared to the administration of free doxorubicin. The application of ultrasound causes a burst in the release of the doxorubicin from the carrier, causing a decrease in cell viability. The microparticles demonstrate in vitro cytocompatibility and hemocompatibility at concentrations of up to 50 and 60 µg/mL, respectively.

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39

Nandi, Nibedita, Kousik Gayen, Sandip Ghosh, Debmalya Bhunia, Steven Kirkham, Sukanta Kumar Sen, Surajit Ghosh, Ian W. Hamley, and Arindam Banerjee. "Amphiphilic Peptide-Based Supramolecular, Noncytotoxic, Stimuli-Responsive Hydrogels with Antibacterial Activity." Biomacromolecules 18, no. 11 (October 30, 2017): 3621–29. http://dx.doi.org/10.1021/acs.biomac.7b01006.

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40

Wang, Feng, Akamol Klaikherd, and S. Thayumanavan. "Temperature Sensitivity Trends and Multi-Stimuli Sensitive Behavior in Amphiphilic Oligomers." Journal of the American Chemical Society 133, no. 34 (August 31, 2011): 13496–503. http://dx.doi.org/10.1021/ja204121a.

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41

Wang, Jilei, Bing Wu, Shang Li, and Yaning He. "NIR light and enzyme dual stimuli-responsive amphiphilic diblock copolymer assemblies." Journal of Polymer Science Part A: Polymer Chemistry 55, no. 15 (May 7, 2017): 2450–57. http://dx.doi.org/10.1002/pola.28632.

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42

GÓŹDŹ, W. T. "SHAPE TRANSFORMATIONS OF VESICLES BUILT OF AMPHIPHILIC MOLECULES." Biophysical Reviews and Letters 03, no. 03 (July 2008): 397–420. http://dx.doi.org/10.1142/s1793048008000848.

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We review our recent work on the shape transformations of vesicles subject to external stimuli. Possible shape transformations resulting from the change of the spontaneous curvature, volume, or composition of the components on the surface of a vesicle are examined within the framework of the spontaneus curvature model. The influence of encapsulated or adhered rigid object such as microtubules or colloidal particles on the shape transformation is also investigated. A few cases of shape transformations encountered in experiments are described.

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43

Liao, Xiaohan, Kai Niu, Feng Liu, and Yongming Zhang. "A Multiple-Stimuli-Responsive Amphiphilic Copolymer for Antifouling and Antibacterial Functionality via a “Resistance–Kill–Release” Mechanism." Molecules 27, no. 16 (August 9, 2022): 5059. http://dx.doi.org/10.3390/molecules27165059.

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In recent years, polymers with stimuli-responsive properties have been increasingly reported on due to their diverse applications. However, most of the studies have only focused on the performance of polymers under specific scenarios. The laws of changes in the properties in response to various external stimuli have been less systematically and quantitatively studied. In this paper, we prepared an amphiphilic polymer (PadaMX and PAdaM3QA−X) with temperature-, pH-, ion-, and β-cyclodextrin (β-CD)-responsive properties. According to the cloud point tested by the UV-Vis method, the lower critical soluble temperature (LCST) of PAdaM3QA−10% was more sensitive to a change in pH and less sensitive to a change in ions compared with PadaM3 due to quaternized side chains with a stronger intramolecular mutual repulsion. We then fabricated the coatings with responsive properties by immobilizing the adamantyl groups on β-CD-modified surfaces. The hydrophilicity of the coatings was improved after quaternization, as proven by the water contact angle (WCA) measurement. The antifouling and antibacterial performance was further evaluated via the fluorescence intensity of bovine serum albumin (BSA) adsorbed on the surfaces and the spread plate method. A 78.4% BSA desorption rate and a 96.8% sterilization rate were achieved by the PAdaM3QA−10% coating. In summary, this work prepared a multiple-stimuli-responsive amphiphilic copolymer for antifouling and antibacterial functionality via a “resistance–kill–release” mechanism.

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44

Lin, Shaojian, Jiaojiao Shang, and Patrick Theato. "CO2-Triggered UCST transition of amphiphilic triblock copolymers and their self-assemblies." Polymer Chemistry 8, no. 17 (2017): 2619–29. http://dx.doi.org/10.1039/c7py00186j.

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45

Muraoka, Takahiro, Hidetaka Honda, Kota Nabeya, and Kazushi Kinbara. "Reversible formation of multiple stimuli-responsive polymeric materials through processing control of trifunctional amphiphilic molecules." Chemical Communications 56, no. 57 (2020): 7881–84. http://dx.doi.org/10.1039/d0cc02716b.

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46

Zhang, Minghui, Hui Yang, Jiazhong Wu, Siyu Yang, Danfeng Yu, Xu Wu, Aiqing Ma, Keji Sun, and Jinben Wang. "Dual-Responsive Nanotubes Assembled by Amphiphilic Dendrimers: Controlled Release and Crosslinking." Materials 13, no. 16 (August 7, 2020): 3479. http://dx.doi.org/10.3390/ma13163479.

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Although stimuli-responsive release systems have attracted great attention in medical applications, there has been no attempt at “precise” deep profile control based on such systems, which is greatly need to improve oil recovery. With this in mind, we provided a facile and simple strategy to prepare stimuli-responsive composite capsules of amphiphilic dendrimers–poly(styrene sulfonic acid) sodium/halloysite nanotubes (HNTs) via layer-by-layer (LbL) self-assembly technique, controlling the release crosslinking agent methenamine under different pH or salinity conditions. The release time of methenamine encapsulated in multilayer shells is about 40 h, which can be prolonged with the introduction of salt or shortened via the addition of acid, which accordingly induces the gelation of polyacrylamide (PAM) solutions, taking from a few hours to a dozen days. This study provided a novel approach for controllable release of chemical agents and controllable crosslinking of deep profiles in many application fields.

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47

Karayianni, Maria, and Stergios Pispas. "Complexation of stimuli-responsive star-like amphiphilic block polyelectrolyte micelles with lysozyme." Soft Matter 8, no. 33 (2012): 8758. http://dx.doi.org/10.1039/c2sm26084k.

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48

Popescu, Maria-Teodora, Constantinos Tsitsilianis, Christine M. Papadakis, Joseph Adelsberger, Sandor Balog, Peter Busch, Natalie A. Hadjiantoniou, and Costas S. Patrickios. "Stimuli-Responsive Amphiphilic Polyelectrolyte Heptablock Copolymer Physical Hydrogels: An Unusual pH-Response." Macromolecules 45, no. 8 (April 3, 2012): 3523–30. http://dx.doi.org/10.1021/ma300222d.

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49

Yang, Libin, Dong Wang, Hong Gao, Hui Cao, Yuzhen Zhao, Zongcheng Miao, Zhou Yang, and Wanli He. "Photoacoustic effect and controlled release of azo and Schiff base derivatives modified by click reagents under the NIR light." Pigment & Resin Technology 49, no. 4 (April 15, 2020): 331–38. http://dx.doi.org/10.1108/prt-12-2019-0121.

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Purpose This study aims to develop a new kind of functional low molecular weight organic dyes, which is highly efficient, meanwhile inexpensive and easily prepared and modified and can be used in photoacoustic (PA) imaging and photothermal therapy (PTT). To further realize the release of molecules under the biomedical condition, the releasing efficiency of micellar nanoparticles under different stimuli were represented. Design/methodology/approach A class of azo and Schiff base derivatives with different click reagents were characterized by PA imaging and photothermal (PT) experiments. The molecule with best PT effect was loaded into a temperature-stimuli-sensitive amphiphilic block copolymer which demonstrated the capability of releasing the polymers under the near-infrared (NIR) light of 650 nm. Findings The PA and PT effects of a series of azo and Schiff base derivatives with different click reagents were characterized. Introducing the click reagent F4-TCNQ can result in red shift of peaks of PA intensity. Stimulated with 650 nm laser irradiation, the polymer processed higher release rate than being stimulated by temperature stimuli. Practical implications This paper not only guides the design of NIR dyes with good PA intensity but also provides a method which has great potential for the application of NIR photothermal dyes in the field of biotechnology for controlled release. Originality/value This paper uses click reagents to modify azo and Schiff derivatives and an amphiphilic block copolymer under NIR light to realize controlled release.

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Tong, Min, Xiaonan An, Weidong Pan, Huanhuan Liu, and Youliang Zhao. "Synthesis and properties of stimuli-sensitive heterografted toothbrush-like terpolymers with a linear handle and two types of V-shaped grafts." Polymer Chemistry 7, no. 12 (2016): 2209–21. http://dx.doi.org/10.1039/c6py00182c.

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Abstract:

Straightforward syntheses were performed to generate amphiphilic heterograftedPNIPAM(PAA)_2m(PCL)_2mcopolymers, which could self-assemble into versatile nanoobjects for thermo, pH and additive triggered controlled release of doxorubicin.

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