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Ferreira P, Gerbelli BB, Castro-Kochi ACH, Cortez B, Castro FL, Cantero J, Iribarne F, Hamley IW, Alves WA. Exploring the Use of a Lipopeptide in Dipalmitoylphosphatidylcholine Monolayers for Enhanced Detection of Glyphosate in Aqueous Environments. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:13583-13595. [PMID: 38907731 PMCID: PMC11223468 DOI: 10.1021/acs.langmuir.4c01089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Revised: 06/13/2024] [Accepted: 06/13/2024] [Indexed: 06/24/2024]
Abstract
The growing reliance on pesticides for pest management in agriculture highlights the need for new analytical methods to detect these substances in food and water. Our research introduces a SPRWG-(C18H37) lipopeptide (LP) as a functional analog of acetylcholinesterase (AChE) for glyphosate detection in environmental samples using phosphatidylcholine (PC) monolayers. This LP, containing hydrophilic amino acids linked to an 18-carbon aliphatic chain, alters lipid assembly properties, leading to a more flexible system. Changes included reduced molecular area and peak pressure in Langmuir adsorption isotherms. Small angle X-ray scattering (SAXS) and atomic force microscopy (AFM) analyses provided insights into the LP's structural organization within the membrane and its interaction with glyphosate (PNG). Structural and geometric parameters, as derived from in silico molecular dynamics simulations (MD), substantiated the impact of LP on the monolayer structure and the interaction with PNG. Notably, the presence of the LP and glyphosate increased charge transfer resistance, indicating strong adherence of the monolayer to the indium tin oxide (ITO) surface and effective pesticide interaction. A calibration curve for glyphosate concentration adjustment revealed a detection limit (LOD) of 24 nmol L-1, showcasing the high sensitivity of this electrochemical biosensor. This LOD is significantly lower than that of a similar colorimetric biosensor in aqueous media with a detection limit of approximately 0.3 μmol L-1. Such an improvement in sensitivity likely stems from adding a polar residue to the amino acid chain of the LP.
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Affiliation(s)
- Priscila
S. Ferreira
- Center
for Natural and Human Sciences, Federal
University of ABC, Santo
André 09210-580, Brazil
| | - Barbara B. Gerbelli
- Center
for Natural and Human Sciences, Federal
University of ABC, Santo
André 09210-580, Brazil
| | - Ana C. H. Castro-Kochi
- Center
for Natural and Human Sciences, Federal
University of ABC, Santo
André 09210-580, Brazil
| | - Bruna Cortez
- Center
for Natural and Human Sciences, Federal
University of ABC, Santo
André 09210-580, Brazil
| | - Fabiola L. Castro
- Center
for Natural and Human Sciences, Federal
University of ABC, Santo
André 09210-580, Brazil
| | - Jorge Cantero
- Theoretical
Chemical Physics and Biology Group, Mathematics-DETEMA Department, Faculty of Chemistry, UdelaR, General Flores 2124, Montevideo 11800, Uruguay
| | - Federico Iribarne
- Theoretical
Chemical Physics and Biology Group, Mathematics-DETEMA Department, Faculty of Chemistry, UdelaR, General Flores 2124, Montevideo 11800, Uruguay
| | - Ian W. Hamley
- Department
of Chemistry, University of Reading, Reading RG6 6AD, U.K.
| | - Wendel A. Alves
- Center
for Natural and Human Sciences, Federal
University of ABC, Santo
André 09210-580, Brazil
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2
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Gibbard JA, Kellow CS, Verlet JRR. Photoelectron spectroscopy of the deprotonated tryptophan anion: the contribution of deprotomers to its photodetachment channels. Phys Chem Chem Phys 2024; 26:12053-12059. [PMID: 38578256 DOI: 10.1039/d4cp00309h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
Photoelectron spectroscopy and electronic structure calculations are used to investigate the electronic structure of the deprotonated anionic form of the aromatic amino acid tryptophan, and its chromophore, indole. The photoelectron spectra of tryptophan, recorded at different wavelengths across the UV, consist of two direct detachment channels and thermionic emission, whereas the hν = 4.66 eV spectrum of indole consists of two direct detachment features. Electronic structure calculations indicate that two deprotomers of tryptophan are present in the ion beam; deprotonation of the carboxylic acid group (Trp(I)-) or the N atom on the indole ring (Trp(II)-). Strong similarities are observed between the direct detachment channels in the photoelectron spectra of tryptophan and indole, which in conjunction with electronic structure calculations, indicate that electron loss from Trp(II)- dominates this portion of the spectra. However, there is some evidence that direct detachment of Trp(I)- is also observed. Thermionic emission is determined to predominantly arise from the decarboxylation of Trp(I)-, mediated by the ππ* excited state near λ = 300 nm, which results in an anionic fragment with a negative electron affinity that readily autodetaches.
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Affiliation(s)
- Jemma A Gibbard
- Department of Chemistry, Durham University, Durham, DH1 3LE, UK.
| | | | - Jan R R Verlet
- Department of Chemistry, Durham University, Durham, DH1 3LE, UK.
- J. Heyrovský Institute of Physical Chemistry, Czech Academy of Sciences, Dolejškova 3, 18223 Prague 8, Czech Republic
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3
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Abou-Hatab S, Matsika S. Excited state hydrogen or proton transfer pathways in microsolvated n-cyanoindole fluorescent probes. Phys Chem Chem Phys 2024; 26:4511-4523. [PMID: 38240574 DOI: 10.1039/d3cp04844f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
The sensitivity of the fluorescence properties of n-cyanoindole (n-CNI) fluorescent probes to the microenvironment makes them potential reporters of protein conformation and hydration. The fluorescence intensity of 5-CNI, 6-CNI, and 7-CNI is quenched when exposed to water solvent whereas substitution on position 4 of indoles dramatically increases it. A potential mechanism for this sensitivity to water may be similar to that found in indole. The fluorescence of indole is found to be quenched when interacting with water and ammonia solvent molecules via radiationless decay through an S1 (πσ*)/S0 conical intersection caused by excited state proton or hydrogen transfer to the solvent molecules. In this study we examine this fluorescence quenching mechanism along the N-H bond stretch of n-CNI probes using water cluster models and quantum mechanical calculations of the excited states. We find that n-CNI-(H2O)1-2 clusters form cyclic or non-cyclic structures via hydrogen bonds which lead to different photochemical reaction paths that can potentially quench the fluorescence by undergoing internal conversion from S1 to S0. However, the existence of a high energy barrier along the potential energy surface of the S1 state in most cases prevents this from occurring. We show that substitution on position 4 leads to the highest energy barrier that prevents the fluorophore from accessing these non-radiative channels, in agreement with its high intensity. We also find that the energy barrier in the S1 state of non-cyclic 5-CNI-(H2O)1-2 excited complexes decreases as the number of water molecules increases, which suggests great sensitivity of the fluorescence quenching on the aqueous environment.
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Mayorga-Burrezo P, Muñoz J, Zaoralová D, Otyepka M, Pumera M. Multiresponsive 2D Ti 3C 2T x MXene via Implanting Molecular Properties. ACS NANO 2021; 15:10067-10075. [PMID: 34125533 DOI: 10.1021/acsnano.1c01742] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The design and fabrication of active nanomaterials exhibiting multifunctional properties is a must in the so-called global "Fourth Industrial Revolution". In this sense, molecular engineering is a powerful tool to implant original capabilities on a macroscopic scale. Herein, different bioinspired 2D-MXenes have been developed via a versatile and straightforward synthetic approach. As a proof of concept, Ti3C2Tx MXene has been exploited as a highly sensitive transducing platform for the covalent assembly of active biomolecular architectures (i.e., amino acids). All pivotal properties originated from the anchored targets were proved to be successfully transferred to the resulting bioinspired 2D-MXenes. Appealing applications have been devised for these 2D-MXene prototypes showing (i) chiroptical activity, (ii) fluorescence capabilities, (iii) supramolecular π-π interactions, and (iv) stimuli-responsive molecular switchability. Overall, this work demonstrates the fabrication of programmable 2D-MXenes, taking advantage of the inherent characteristics of the implanted (bio)molecular components. Thus, the current bottleneck in the field of 2D-MXenes can be overcome after the significant findings reported here.
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Affiliation(s)
- Paula Mayorga-Burrezo
- Future Energy and Innovation Laboratory, Central European Institute of Technology, Brno University of Technology (CEITEC-BUT), Purkyňova 123, 61200 Brno, Czech Republic
| | - Jose Muñoz
- Future Energy and Innovation Laboratory, Central European Institute of Technology, Brno University of Technology (CEITEC-BUT), Purkyňova 123, 61200 Brno, Czech Republic
| | - Dagmar Zaoralová
- Czech Advanced Technology and Research Institute (CATRIN), Regional Centre of Advanced Technologies and Materials (RCPTM), Palacký University Olomouc, Šlechtitelů 27, 779 00 Olomouc, Czech Republic
| | - Michal Otyepka
- Czech Advanced Technology and Research Institute (CATRIN), Regional Centre of Advanced Technologies and Materials (RCPTM), Palacký University Olomouc, Šlechtitelů 27, 779 00 Olomouc, Czech Republic
- IT4Innovations, VSB - Technical University of Ostrava, 17. listopadu 2172/15, 708 00 Ostrava-Poruba, Czech Republic
| | - Martin Pumera
- Future Energy and Innovation Laboratory, Central European Institute of Technology, Brno University of Technology (CEITEC-BUT), Purkyňova 123, 61200 Brno, Czech Republic
- Center for Nanorobotics and Machine Intelligence, Department of Food Technology, Mendel University in Brno, Zemedelska 1/1665, 613 00 Brno, Czech Republic
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-Gu, Seoul 03722, South Korea
- Department of Medical Research, China Medical University Hospital, China Medical University, No. 91 Hsueh-Shih Road, Taichung 40402, Taiwan
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Knox PP, Gorokhov VV, Korvatovsky BN, Grishanova NP, Goryachev SN, Paschenko VZ. Specific features of the temperature dependence of tryptophan fluorescence lifetime in the temperature range of −170–20 °C. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112435] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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6
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Abou-Hatab S, Matsika S. Theoretical Investigation of Positional Substitution and Solvent Effects on n-Cyanoindole Fluorescent Probes. J Phys Chem B 2019; 123:7424-7435. [DOI: 10.1021/acs.jpcb.9b05961] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Salsabil Abou-Hatab
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
| | - Spiridoula Matsika
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, United States
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7
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Mukherjee D, Ortiz Rodriguez LI, Hilaire MR, Troxler T, Gai F. 7-Cyanoindole fluorescence as a local hydration reporter: application to probe the microheterogeneity of nine water-organic binary mixtures. Phys Chem Chem Phys 2018; 20:2527-2535. [PMID: 29313858 DOI: 10.1039/c7cp07160d] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Considerable efforts have been devoted to the development of spectroscopic probes that are sensitive to water and can be used to monitor, for example, biological and chemical processes involving dehydration or hydration. Continuing this line of research, herein we show that 7-cyanoindole can serve as a sensitive fluorescence probe of hydration as its fluorescence properties, including intensity, peak wavelength and lifetime, depend on the amount of water in nine water-organic solvent mixtures. Our results indicate that 7-cyanoindole is not only able to reveal the underlying microheterogeneity of these binary solvent systems, but also offers distinct advantages. These include: (1) its fluorescence intensity increases more than ten times upon going from a hydrated to a dehydrated environment; (2) its peak wavelength shifts as much as 35 nm upon dehydration; (3) its single-exponential fluorescence decay lifetime increases from 2.0 ns in water to 8-16 ns in water-organic binary mixtures, making it viable to distinguish between differently hydrated environments via fluorescence lifetime measurements; and (4) its absorption spectrum is significantly red-shifted from that of indole, making selective excitation of its fluorescence possible in the presence of naturally occurring amino-acid fluorophores. Moreover, we find that for seven binary mixtures the fluorescence lifetimes of 7-cyanoindole measured at solvent compositions where maximum microheterogeneity occurs correlate linearly with the peak wavenumbers of its fluorescence spectra obtained in the respective pure organic solvents. This suggests that the microheterogeneities of these binary mixtures bear certain similarity, a phenomenon that warrants further investigation.
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Affiliation(s)
- Debopreeti Mukherjee
- Department of Chemistry University of Pennsylvania, 231 South 34th Street, Philadelphia, PA 19104, USA.
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8
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Catalán J, Reichardt C. Solvation by Glycerol at Temperatures from 353 to 77 K: Its Solvatochromic Characterization and Use to Block the Molecular Structure of Conformationally Flexible Structures. J Phys Chem A 2017; 121:7114-7120. [PMID: 28857568 DOI: 10.1021/acs.jpca.7b06027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Glycerol is UV/vis spectroscopically characterized by using suitable solvatochromic polarity probes spanning a wide temperature range of 353 to 77 K. For the first time we find experimental evidence that, when the solvent preserves its internal structure in a broad range of temperatures, all solvatochromically derived solvent parameters (i.e., SP, SdP, SA, and SB) also maintain their values unchanged. On the basis of these solvatochromic measurements, it is shown that, below 180 K, glycerol efficiently blocks the molecular structure of conformationally flexible solutes.
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Affiliation(s)
- Javier Catalán
- Departamento de Química Física Aplicada, Universidad Autónoma de Madrid , 28049 Madrid, Spain
| | - Christian Reichardt
- Fachbereich Chemie, Philipps-Universität , Hans-Meerwein-Strasse 4, 35032 Marburg, Germany
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9
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Maione S, del Valle LJ, Pérez-Madrigal MM, Cativiela C, Puiggalí J, Alemán C. Electrospray loading and release of hydrophobic gramicidin in polyester microparticles. RSC Adv 2016. [DOI: 10.1039/c6ra11056h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Gramicidin, a pentadecapeptide with well-known antimicrobial properties and recently identified therapeutic activity against different carcinomas, has been loaded by electrospraying in biodegradable and biocompatible poly(tetramethylene succinate).
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Affiliation(s)
- Silvana Maione
- Department of Chemical Engineering
- ETSEIB
- Universitat Politècnica de Catalunya
- Barcelona 08028
- Spain
| | - Luis J. del Valle
- Department of Chemical Engineering
- ETSEIB
- Universitat Politècnica de Catalunya
- Barcelona 08028
- Spain
| | - Maria M. Pérez-Madrigal
- Department of Chemical Engineering
- ETSEIB
- Universitat Politècnica de Catalunya
- Barcelona 08028
- Spain
| | - Carlos Cativiela
- Departamento de Química Orgánica
- Instituto de Síntesis Química y Catálisis Homogénea-ISQCH
- CSIC-Universidad de Zaragoza
- 50009 Zaragoza
- Spain
| | - Jordi Puiggalí
- Department of Chemical Engineering
- ETSEIB
- Universitat Politècnica de Catalunya
- Barcelona 08028
- Spain
| | - Carlos Alemán
- Department of Chemical Engineering
- ETSEIB
- Universitat Politècnica de Catalunya
- Barcelona 08028
- Spain
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