Basic hydrolysis of carbofuran in the presence of cyclodextrins

Morales, Juan J.; Manso, José A.; Mejuto, J. C.

doi:10.1080/10610278.2012.688121

Cited by 7 publications

(3 citation statements)

References 33 publications

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“…When the reaction rate decreases due to the presence of CDs, these can be used as stabilisers; however, of more interest are the situations in which CDs accelerate reactions or may even participate directly in guest hydrolysis [185,186]. Following this principle, the kinetic analysis of competing reactions involving surfactants,…”

Section: Accepted Manuscriptmentioning

confidence: 99%

The formation of host–guest complexes between surfactants and cyclodextrins

Valente

Söderman

2014

Advances in Colloid and Interface Science

183

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Cyclodextrins are able to act as host molecules in supramolecular chemistry with applications ranging from pharmaceutics to detergency. Among guest molecules surfactants play an important role with both fundamental and practical applications. The formation of cyclodextrin/surfactant host-guest compounds leads to an increase in the critical micelle concentration and in the solubility of surfactants. The possibility of changing the balance between several intermolecular forces, and thus allowing the study of, e.g., dehydration and steric hindrance effects upon association, makes surfactants ideal guest molecules for fundamental studies. Therefore, these systems allow for obtaining a deep insight into the host-guest association mechanism. In this paper, we review the influence on the thermodynamic properties of CD-surfactant association by highlighting the effect of different surfactant architectures (single tail, double-tailed, gemini and bolaform), with special emphasis on cationic surfactants. This is complemented with an assessment of the most common analytical techniques used to follow the association process. The applied methods for computation of the association stoichiometry and stability constants are also reviewed and discussed; this is an important point since there are significant discrepancies and scattered data for similar systems in the literature.In general, the surfactant-cyclodextrin association is treated without reference to the kinetics of the process. However, there are several examples where the kinetics of the process can be investigated, in particular those where volumes of the CD cavity and surfactant (either the tail or in special cases the head group) are similar in magnitude.This will also be critically reviewed.

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Section: Accepted Manuscriptmentioning

confidence: 99%

The formation of host–guest complexes between surfactants and cyclodextrins

Valente

Söderman

2014

Advances in Colloid and Interface Science

183

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“…The half-life of carbofuran in the environment is 30-120 days, based on where it is, the temperature, the pH of the soil or water, and medium humidity. The most common ways carbofuran and its by-products degrade are through hydrolysis, sunlight exposure, and biodegradation (Morales et al, 2012).…”

Section: Carbofuran Degradation Pathways In the Environmentmentioning

confidence: 99%

Understanding the Degradation of Carbofuran in Agricultural Area: A Review of Fate, Metabolites, and Toxicity

Baharudin,

Ahmad,

Hossain

2023

JST

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Pesticides are commonly applied in agriculture to manage pests, parasites, weeds, and other crop diseases to maximise product output value and minimise or reduce yield losses. Pesticides are widely and indiscriminately used in crop production in most countries. Carbofuran is a highly toxic insecticide commonly used to protect crops in agricultural areas. Exposure to carbofuran can cause harmful effects on both the ecological environment and human health, particularly on non-target species such as birds and aquatic organisms. Carbofuran continues to be used, although it has been banned in some countries. This review paper highlights carbofuran usage, its residue, toxicity, and mechanisms of degradation pathways in water, soil, and food, especially in agriculture. It has been shown that hydrolysis, photolysis, and microbial degradation are the main pathways for carbofuran degradation. Carbofuran phenol is significantly less toxic than all photo-metabolites, while 3-ketocarbofuran and 3-hydroxycarbofuran are practically as harmful as the parent compound. Hence, more study is needed on degradation pathways that may thoroughly minimise the toxicity of this deadly pesticide.

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“…Supramolecular chemistry based on noncovalent bonds has become a powerful means to construct amphiphiles in a simple, dynamic way. The complex formed between cyclodextrin (CD) and azobenzene (AZO) is a typical supramolecular assembly system; − the formation and the dissociation of the complex can be controlled by light because of the reversible isomerization of azobenzene under UV and visible light. , Thus, this system has been widely used in building molecular shuttles, motors, machines, surfactants, ion channels, hydrogels, and so on. − …”

Section: Introductionmentioning

confidence: 99%

Hierarchical Assembly of Amphiphilic POSS-Cyclodextrin Molecules and Azobenzene End-Capped Polymers

Zhou

et al. 2014

Macromolecules

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Stimuli-responsive polymers have been widely studied because of their potential use in nanocarriers and nanocontainers. In this study, a smart multistimuli responsive system was prepared through a light controlled supramolecular assembly. Mono cyclodextrin substituted isobutyl polyhedral oligomeric silsesquioxane (mCPOSS), an amphiphilic molecule, was synthesized by copper(I)-catalyzed azide−alkyne cycloaddition (CuAAC), while azobenzene end-capped poly-(ethylene glycol)-b-poly(2-(dimethylamino)ethyl methacrylate) copolymer (PEG-b-PDMAEMA-azo, PPA), a biocompatible pH/temperature-responsive macromolecule, was synthesized by atom transfer radical polymerization and CuAAC. The selfassembly process of PPA and mCPOSS in aqueous solution was as followed: first, mCPOSS self-assembled into a nanosphere in aqueous solution because of its amphipathic property; then, the trans-azo end groups of the PPA interacted with the cyclodextrin cavities on the nanosphere, and complex micelles were formed by the supramolecular assembly between PPA and mCPOSS. In addition, the morphology of the micelles could be adjusted by the ratio of PPA and mCPOSS, the formation and the dissociation of the micelles could be controlled by visible and ultraviolet light, and the size of the micelles could be tuned by pH.

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Basic hydrolysis of carbofuran in the presence of cyclodextrins

Cited by 7 publications

References 33 publications

The formation of host–guest complexes between surfactants and cyclodextrins

The formation of host–guest complexes between surfactants and cyclodextrins

Understanding the Degradation of Carbofuran in Agricultural Area: A Review of Fate, Metabolites, and Toxicity

Hierarchical Assembly of Amphiphilic POSS-Cyclodextrin Molecules and Azobenzene End-Capped Polymers

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