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Vidal-Vidal Á, Cabaleiro-Lago EM, Silva López C, Faza ON. Rational Design of Efficient Environmental Sensors: Ring-Shaped Nanostructures Can Capture Quat Herbicides. ACS OMEGA 2018; 3:16976-16988. [PMID: 31458320 PMCID: PMC6643635 DOI: 10.1021/acsomega.8b02673] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Accepted: 11/27/2018] [Indexed: 05/04/2023]
Abstract
The viability of using [n]-cycloparaphenylenes (CPPs) of different sizes to encapsulate diquat (DQ) pesticide molecules has been tested analyzing the origin of the host-guest interactions stabilizing the complex. This analysis provides rational design capabilities to construct ad hoc capturing systems tailored to the desired pollutant. All CPPs considered (n = 7-12) are capable of forming remarkably stable complexes with DQ, though [9]-CPP is the best candidate, where a fine balance is established between the energy penalty due to the deformation + repulsion of the pesticide molecule inside the cavity (larger in smaller CPPs) and the maximization of the favorable dispersion, electrostatic and induction contributions (which also decrease in larger rings). These encouraging results prompted us to evaluate the potential of using Resonance Raman spectroscopy on nanohoop complexes as a tool for DQ sensing. The shifts observed in the vibrational frequencies of DQ upon complexation allow us to determine whether complexation has been achieved. Additionally, a large enhancement of the signals permits a selective identification of the vibrational modes.
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Affiliation(s)
- Ángel Vidal-Vidal
- Departamento de Química Orgánica, Facultade de Química, Campus Lagoas-Marcosende, 36310 Vigo, Spain
| | - Enrique M Cabaleiro-Lago
- Departamento de Química Física, Facultade de Ciencias, Campus de Lugo, Avda. Alfonso X El Sabio s/n, 27002 Lugo, Spain
| | - Carlos Silva López
- Departamento de Química Orgánica, Facultade de Química, Campus Lagoas-Marcosende, 36310 Vigo, Spain
| | - Olalla Nieto Faza
- Departamento de Química Orgánica, Universidade de Vigo, Campus As Lagoas, 32004 Ourense, Spain
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Guo Y, Liang X, Wang Y, Liu Y, Zhu G, Gui W. Cyclodextrin-based molecularly imprinted polymers for the efficient recognition of pyrethroids in aqueous media. J Appl Polym Sci 2012. [DOI: 10.1002/app.38440] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Zhou S, Wang L, Zhang A, Lin K, Liu W. Preparation, stabilization, and bioefficacy of beta-cyclodextrin inclusion compounds of chloramidophos. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:2708-2713. [PMID: 18370398 DOI: 10.1021/jf703635p] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Cyclodextrins are common compounds capable of forming inclusion complexes with a variety of pesticides to improve their solubility, bioavailability, and stability. In this study, chloramidophos (CP) was inclusion-complexed with beta-cyclodextrin (beta-CD) by a kneading method in an attempt to gain a more stable but equally effecacious formulation compared with CP alone. A 1:1 CP-beta-CD complex with an inclusion constant of 203.0 M(-1) was determined to exist by UV spectrophotometry. The structural identification, thermal stability, and biological assays of the CP-beta-CD complex were then carried out with a product with the maximum guest loading efficiency. The data measured by differential scanning calorimetry (DSC), Fourier transform infrared (FT-IR), and X-ray diffraction (XRD), where the endothermic peaks of beta-CD, the FT-IR bands, and the XRD peaks were generally changed, deduced the formation of complex. Results of the thermal stability assay showed that the degradation rate of CP in 14-day incubation was slowed by a factor of 3.6 when it was complexed with beta-CD. Then, activity and toxicity of CP influenced by the encapsulated process of beta-CD were evaluated by an in vitro acetylcholinesterase (AChE) inhibition assay and an acute aquatic toxicity assay, respectively. No significant differences were found in both the two biological assays by a t-test. This indicated that the encapsulation process greatly improved the thermal stability of the pesticide with no adverse effects on bioefficacy compared to that of CP. There is a promising outlook for CP-beta-CD to be produced as the active ingredient of various formulation additives of CP for its continued application.
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Affiliation(s)
- Shanshan Zhou
- Institute of Environmental Science, Zhejiang University, Hangzhou 310027, People's Republic of China
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Hinze WL. Applications of Cyclodextrins in Chromatographic Separations and Purification Methods. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/03602548108066011] [Citation(s) in RCA: 209] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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NMR Investigations of Inclusion Complexes between β-Cyclodextrin and Naphthalene/Anthraquinone Derivatives. J INCL PHENOM MACRO 2006. [DOI: 10.1007/s10847-006-9135-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Dupuy N, Barbry D, Bria M, Marquis S, Vrielynck L, Kister J. 1H NMR study of inclusion compounds of phenylurea derivatives in beta-cyclodextrin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2005; 61:1051-1057. [PMID: 15741102 DOI: 10.1016/j.saa.2004.04.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2004] [Accepted: 04/07/2004] [Indexed: 05/24/2023]
Abstract
Proton nuclear magnetic resonance spectroscopy ((1)H NMR), which has become an important tool for the study "in situ" of beta-cyclodextrin (beta-CD) complexes, was used to study and structurally characterize the inclusion complexes formed between beta-CD and isoproturon, fenuron, monuron and diuron. The high variation of the chemical shifts from the proton located inside the cavity (H-3, H-5 and H-6) coupled with the non variation of the one located outer sphere of the beta-CD (H-1, H-2 and H-4) provided clear evidence of the inclusion phenomena. Two-dimensional rotating frame Overhauser effect spectroscopy (ROESY) experiments were carried out to further support the proposed inclusion mode.
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Affiliation(s)
- N Dupuy
- Systèmes chimiques complexes, (GOAE), UMR 6171, Université de Marseille 3, Avenue escadrille Normandie Niemen, 13397 Marseille Cedex 20, France.
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Orgoványi J, Otta KH, Pöppl L, Fenyvesi É, Záray G. Spectrophotometric and thermoanalytical study of cypermethrin/cyclodextrin complexes. Microchem J 2005. [DOI: 10.1016/j.microc.2004.10.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Vrielynck L, Lapouge C, Marquis S, Kister J, Dupuy N. Theoretical and experimental vibrational study of phenylurea: structure, solvent effect and inclusion process with the beta-cyclodextrin in the solid state. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2004; 60:2553-2559. [PMID: 15294244 DOI: 10.1016/j.saa.2003.12.035] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2003] [Accepted: 12/12/2003] [Indexed: 05/24/2023]
Abstract
FTIR and Raman vibrational spectroscopic techniques as well as DFT quantum chemical calculation were used for characterizing conformational changes of phenylurea (a herbicide parent molecule) occurring from solid state to aqueous medium. Experimental infrared frequencies were assigned on the base of urea and benzenic derivatives spectroscopic data available in the literature and vibrational normal modes analytical calculation at the fully optimized geometry. Investigation of isotopic and solvent effects has revealed that the structure of phenylurea is particularly sensitive to the electrostatic environment via hydrogen non covalent bonds. The ability of beta-cyclodextrin (beta-CD) to form host-guest inclusion complex with phenylurea in the solid state was also evidenced by significant frequency shifts observed in the 1400-1800 cm(-1) spectral range.
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Affiliation(s)
- L Vrielynck
- Systèmes Chimiques Complexes: Matières organiques Récentes et Fossiles dans l'Environnement, CNRS UMR 6171, case 561, Université d'Aix-Marseille 3, 13397 Marseille Cedex 20, France.
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Hussain LA, Dickens SH, Bowen RL. Effects of polymerization initiator complexation in methacrylated β-cyclodextrin formulations. Dent Mater 2004; 20:513-21. [PMID: 15134938 DOI: 10.1016/j.dental.2003.07.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2002] [Revised: 05/30/2003] [Accepted: 07/01/2003] [Indexed: 11/25/2022]
Abstract
OBJECTIVES Methacrylated beta-cyclodextrin (MCD) is a candidate dental monomer that can complex molecules within its hydrophobic cavity. This study determined the effects of complexation of polymerization initiators such as camphorquinone (CQ) and ethyl-4-dimethylaminobenzoate (4E) with MCD on the flexural strength (FS) and degree of conversion (DC) of resulting dental composite formulations. METHODS Complexation of CQ and 4E with MCD was studied by thin layer chromatography. A mass fraction of 44% 2-hydroxyethylmethacrylate or triethyleneglycoldimethacrylate was mixed separately with a mass fraction of 56% MCD to produce a workable formulation. The mixture was activated with varied amounts of CQ and 4E. One part by mass of the activated resin formulation was mixed with three parts by mass of glass filler. Specimens for FS were prepared by filling molds with composites and curing for 2 min. The cured specimens were immersed in 37 degrees C water for 24 h and FS was measured with an Instron machine at a crosshead speed of 0.5 mm/min. DC in MCD-based resin formulations was measured with a differential photocalorimeter under nitrogen. RESULTS MCD appears to form inclusion complexes with CQ and 4E. As a result, FS and DC of MCD-based composites vary significantly as a function of the concentration of polymerization initiators used in the formulations. SIGNIFICANCE Complexation of polymerization initiators with MCD can influence the FS and DC in MCD-based dental formulations and should be taken into consideration when evaluating MCD as a dental monomer.
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Affiliation(s)
- Latiff A Hussain
- Paffenbarger Research Center, American Dental Association Health Foundation, National Institute of Standards and Technology, 100 Bureau Drive, Stop 8546, Gaithersburg, MD 20899, USA.
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Dupuy N, Marquis S, Vanhove G, Bria M, Kister J, Vrielynck L. Characterization of aqueous and solid inclusion complexes of diuron and isoproturon with beta-cyclodextrin. APPLIED SPECTROSCOPY 2004; 58:711-718. [PMID: 15198824 DOI: 10.1366/000370204872999] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The interaction of diuron and isoproturon herbicides with beta-cyclodextrin is conducive to the formation of inclusion compounds in aqueous solution as well as in the solid state. The physico-chemical study of these complexes was carried out by various analytical techniques such as ultraviolet (UV), Fourier transform infrared (FT-IR), Raman, X-ray diffraction, and 1H-NMR (nuclear magnetic resonance) spectroscopies. The existence of inclusion complexes in water solution between the beta-cyclodextrin and each of the herbicides was revealed by electronic absorption and 1H-NMR spectroscopies. A 1:1 stoichiometry was determined for both complexes in aqueous medium from UV absorption spectra by using the Benesi-Hildebrand method; the relative stability constants at room temperature were calculated at 2700 +/- 300 L mol(-1) and 750 +/- 50 L mol(-1) for isoproturon and diuron, respectively. In the solid state, inclusion processes with beta-cyclodextrin were characterized by means of infrared and Raman techniques and confirmed by X-ray diffraction spectra.
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Affiliation(s)
- N Dupuy
- Laboratoire de Spectrochimie Infrarouge et Raman, UMR CNRS 8516, Centre d'Etudes et de Recherches Lasers et Applications, Bât. C5, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq, France
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Consonni R, Recca T, Dettori MA, Fabbri D, Delogu G. Structural characterization of imazalil/beta-cyclodextrin inclusion complex. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2004; 52:1590-1593. [PMID: 15030216 DOI: 10.1021/jf034827z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
An equimolar inclusion complex between imazalil, a selected fungicide, and beta-cyclodextrin using an aqueous standard solution procedure has been obtained. The complex has been investigated in solution by (1)H and (13)C NMR techniques in combination with computational methods in order to establish a valuable analytical protocol through which to gain insight into the interactions of the inclusion complex in aqueous solution. Intramolecular NMR distance constraints have been detected and used for three-dimensional complex structure determination.
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Affiliation(s)
- Roberto Consonni
- Istituto per lo Studio delle Macromolecole, Lab NMR, CNR, Via Bassini 15, 20133 Milano, Italy.
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Husain N, Christian AY, Warner IM. Effect of co-modifiers in cyclodextrin-modified mobile phases on the reversed-phase high-performance liquid chromatographic separation of polyaromatic hydrocarbons. J Chromatogr A 1995. [DOI: 10.1016/0021-9673(95)00038-o] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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