Photoresponsive polymers based on a coumarin moiety for the controlled release of pesticide 2,4-D

Atta, Sanghamitra; Paul, Amrita; Banerjee, Rakesh; Bera, Manoranjan; Ikbal, Mohammed; Dhara, Dibakar; Singh, N. D. Pradeep

doi:10.1039/c5ra18944f

Cited by 45 publications

(32 citation statements)

References 39 publications

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“…This controlled-release formulation showed strong fluorescence and light responsiveness, again effectively transmitting the pesticide into the plant body to improve herbicidal activity. Compared with original pesticides, controlled-release formulations exhibit better thermal stability and lower dissolvability [ 40 ].…”

Section: Delivery Systems For Environmentally Responsive Preciselmentioning

confidence: 99%

Advances in Targeted Pesticides with Environmentally Responsive Controlled Release by Nanotechnology

et al. 2018

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Pesticides are the basis for defending against major biological disasters and important for ensuring national food security. Biocompatible, biodegradable, intelligent, and responsive materials are currently an emerging area of interest in the field of efficient, safe, and green pesticide formulation. Using nanotechnology to design and prepare targeted pesticides with environmentally responsive controlled release via compound and chemical modifications has also shown great potential in creating novel formulations. In this review, special attention has been paid to intelligent pesticides with precise controlled release modes that can respond to micro-ecological environment changes such as light-sensitivity, thermo-sensitivity, humidity sensitivity, soil pH, and enzyme activity. Moreover, establishing intelligent and controlled pesticide release technologies using nanomaterials are reported. These technologies could increase pesticide-loading, improve the dispersibility and stability of active ingredients, and promote target ability.

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Section: Delivery Systems For Environmentally Responsive Preciselmentioning

confidence: 99%

Advances in Targeted Pesticides with Environmentally Responsive Controlled Release by Nanotechnology

et al. 2018

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“…It presented a large number of gaps, obviously different from Figure I (a), (b) and (c), which providing a channel for the release of pesticides. [7][8][9][10] Figure IV gave the pesticide film releases pesticide under light control conditions. Multi-pulsatile pesticide release could be achieved by the photo-responsive controlled pesticide release film through UV and visible light irradiation, and approximately 45 % of the loaded acetamiprid was released.…”

Section: Photo-responsive Property Of Peg Supported Spiropyran Carmentioning

confidence: 99%

“…[8] Atta et al synthesized photoresponsive 2,4-D controlled release agents base on photoresponsive perylene-3ylmethanol and coumarin to improve the weeding effect. [9,10] Spiropyrans, as a class of typical photochromic compounds, respond to light and undergo a reversible open-closed transition (Figure 1). Numerous applications based on their reversible color and some changes in physical and chemical properties were suggested and examined.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of Photo-responsive Controlled Release Pesticide Film

Xu¹,

Li²,

Zhou³

et al. 2019

Proceedings of the 2019 International Conference on Electronical, Mechanical and Materials Engineering (ICE2ME 2019)

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A photo-responsive controlled pesticide release film system was constructed by using PEG supported spiropyran as a carrier and chitosan as a film-forming additive. The biodegradable film was formed by coating method in the glass sheet. Acetamiprid, a new broad-spectrum insecticide with certain acaricidal activity, was encapsulated in the photoresponsive film reaching encapsulation efficiency as much as 65%. The pesticide release at the same speed was detected from the chitosan film without the photo-responsive carrier, whereas multi-pulsatile pesticide release was observed from the photoresponsive controlled pesticide release film. This work would promote the development of controlled-release pesticide systems.

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“…Controlled delivery technology has proven its potential for sustainable use of pesticides in agriculture [ 5 , 6 , 7 ]. The advantages of controlled release formulations (CRFs) of pesticides over conventional formulations include (i) reducing losses induced by evaporation and leaching [ 8 , 9 ], (ii) prolonging effective lifetime [ 10 ], (iii) protecting the active ingredients against environmental degradation by photo, heat, humidity and microorganisms [ 11 , 12 , 13 ], (iv) minimizing residues in the environment, agricultural products and food chain [ 14 ] and (v) reducing toxicity for nontarget organisms including humans [ 15 ]. Therefore, much academic and industrial effort has been devoted to the improvement of CRFs of pesticides that ensure the agricultural yields through an environmentally friendly approach [ 3 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

“…Light-controlled CRFs have strong potential applications in agriculture, able to take advantage of the abundant natural sunlight radiation in open fields, and even for greenhouses with simulated sunlight or UV light equipment [ 18 ]. Several light-responsive groups have been developed for this purpose, including coumarin [ 14 ], azobenzene [ 1 ], 2-nitrobenzyl [ 22 ] and spiropyran [ 25 ]. Among these light triggers, the coumarin-based platform is notably attractive because of the efficient photorelease ability and strong fluorescence property [ 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Coumarin-Containing Light-Responsive Carboxymethyl Chitosan Micelles as Nanocarriers for Controlled Release of Pesticide

et al. 2020

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Currently, controlled release formulations (CRFs) of pesticides in response to biotic and/or abiotic stimuli have shown great potential for providing “on-demand” smart release of loaded active ingredients. In this study, amphiphilic biopolymers were prepared by introducing hydrophobic (7-diethylaminocoumarin-4-yl)methyl succinate (DEACMS) onto the main chain of hydrophilic carboxymethylchitosan (CMCS) via the formation of amide bonds which were able to self-assemble into spherical micelles in aqueous media and were utilized as light-responsive nanocarriers for the controlled release of pesticides. FTIR and NMR characterizations confirmed the successful synthesis of the CMCS-DEACMS conjugate. The critical micelle concentration (CMC) decreased with the increase in the substitution of DEACMS on CMCS, which ranged from 0.013 to 0.042 mg/mL. Upon irradiation under simulated sunlight, the hydrodynamic diameter, morphology, photophysical properties and photolysis were researched by means of dynamic light scattering (DLS), transmission electron microscopy (TEM), UV-vis absorption spectroscopy and fluorescence spectroscopy. Moreover, 2,4-dichlorophenoxyacetic acid (2,4-D) was used as a model pesticide and encapsulated into the CMCS-DEACMS micelles. In these micelle formulations, the release of 2,4-D was promoted upon simulated sunlight irradiation, during which the coumarin moieties were cleaved from the CMCS backbone, resulting in a shift of the hydrophilic–hydrophobic balance and destabilization of the micelles. Additionally, bioassay studies suggested that this 2,4-D contained which micelles showed good bioactivity on the target plant without harming the nontarget plant. Thereby, the light-responsive CMCS-DEACMS micelles bearing photocleavable coumarin moieties provide a smart delivery platform for agrochemicals.

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Photoresponsive polymers based on a coumarin moiety for the controlled release of pesticide 2,4-D

Abstract: We report an excellent photoresponsive controlled release formulation based on a coumarin copolymer for pesticide 2,4-D.

Cited by 45 publications

References 39 publications

Advances in Targeted Pesticides with Environmentally Responsive Controlled Release by Nanotechnology

Advances in Targeted Pesticides with Environmentally Responsive Controlled Release by Nanotechnology

Preparation and Properties of Photo-responsive Controlled Release Pesticide Film

Coumarin-Containing Light-Responsive Carboxymethyl Chitosan Micelles as Nanocarriers for Controlled Release of Pesticide

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