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Yan C, Wang C, Wagner JC, Ren J, Lee C, Wan Y, Wang SE, Xiong W. Multidimensional Widefield Infrared-Encoded Spontaneous Emission Microscopy: Distinguishing Chromophores by Ultrashort Infrared Pulses. J Am Chem Soc 2024; 146:1874-1886. [PMID: 38085547 PMCID: PMC10811677 DOI: 10.1021/jacs.3c07251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 11/30/2023] [Accepted: 11/30/2023] [Indexed: 01/25/2024]
Abstract
Photoluminescence (PL) imaging has broad applications in visualizing biological activities, detecting chemical species, and characterizing materials. However, the chemical information encoded in the PL images is often limited by the overlapping emission spectra of chromophores. Here, we report a PL microscopy based on the nonlinear interactions between mid-infrared and visible excitations on matters, which we termed MultiDimensional Widefield Infrared-encoded Spontaneous Emission (MD-WISE) microscopy. MD-WISE microscopy can distinguish chromophores that possess nearly identical emission spectra via conditions in a multidimensional space formed by three independent variables: the temporal delay between the infrared and the visible pulses (t), the wavelength of visible pulses (λvis), and the frequencies of the infrared pulses (ωIR). This method is enabled by two mechanisms: (1) modulating the optical absorption cross sections of molecular dyes by exciting specific vibrational functional groups and (2) reducing the PL quantum yield of semiconductor nanocrystals, which was achieved through strong field ionization of excitons. Importantly, MD-WISE microscopy operates under widefield imaging conditions with a field of view of tens of microns, other than the confocal configuration adopted by most nonlinear optical microscopies, which require focusing the optical beams tightly. By demonstrating the capacity of registering multidimensional information into PL images, MD-WISE microscopy has the potential of expanding the number of species and processes that can be simultaneously tracked in high-speed widefield imaging applications.
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Affiliation(s)
- Chang Yan
- Department
of Chemistry and Biochemistry, University
of California San Diego, La Jolla, California 92093, United States
- Center
for Ultrafast Science and Technology, School of Chemistry and Chemical
Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
- Zhangjiang
Institute for Advanced Study, Shanghai Jiao
Tong University, Shanghai 200240, China
| | - Chenglai Wang
- Department
of Chemistry and Biochemistry, University
of California San Diego, La Jolla, California 92093, United States
| | - Jackson C. Wagner
- Department
of Chemistry and Biochemistry, University
of California San Diego, La Jolla, California 92093, United States
| | - Jianyu Ren
- Department
of Chemistry and Biochemistry, University
of California San Diego, La Jolla, California 92093, United States
| | - Carlynda Lee
- Department
of Chemistry and Biochemistry, University
of California San Diego, La Jolla, California 92093, United States
| | - Yuhao Wan
- Department
of Pathology, University of California San
Diego, La Jolla, California 92093, United States
| | - Shizhen E. Wang
- Department
of Pathology, University of California San
Diego, La Jolla, California 92093, United States
| | - Wei Xiong
- Department
of Chemistry and Biochemistry, University
of California San Diego, La Jolla, California 92093, United States
- Materials
Science and Engineering Program, University
of California San Diego, La Jolla, California 92093, United States
- Department
of Electrical and Computer Engineering, University of California San Diego, La Jolla, California 92093, United States
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Novara C, Montesi D, Bertone S, Paccotti N, Geobaldo F, Channab M, Angelini A, Rivolo P, Giorgis F, Chiadò A. Role of probe design and bioassay configuration in surface enhanced Raman scattering based biosensors for miRNA detection. J Colloid Interface Sci 2023; 649:750-760. [PMID: 37385040 DOI: 10.1016/j.jcis.2023.06.090] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 06/01/2023] [Accepted: 06/14/2023] [Indexed: 07/01/2023]
Abstract
The accurate design of labelled oligo probes for the detection of miRNA biomarkers by Surface Enhanced Raman Scattering (SERS) may improve the exploitation of the plasmonic enhancement. This work, thus, critically investigates the role of probe labelling configuration on the performance of SERS-based bioassays for miRNA quantitation. To this aim, highly efficient SERS substrates based on Ag-decorated porous silicon/PDMS membranes are functionalized according to bioassays relying on a one-step or two-step hybridization of the target miRNA with DNA probes. Then, the detection configuration is varied to evaluate the impact of different Raman reporters and their labelling position along the oligo sequence on bioassay sensitivity. At high miRNA concentration (100-10 nM), a significantly increased SERS intensity is detected when the reporters are located closer to the plasmonic surface compared to farther probe labelling positions. Counterintuitively, a levelling-off of the SERS intensity from the different configurations is recorded at low miRNA concentration. Such effect is attributed to the increased relative contribution of Raman hot-spots to the whole SERS signal, in line with the electric near field distribution simulated for a simplified model of the Ag nanostructures. However, the beneficial effect of reducing the reporter-to-surface distance is partially retained for a two-step hybridization assay thanks to the less sterically hindered environment in which the second hybridization occurs. The study thus demonstrates an improvement of the detection limit of the two-step assay by tuning the probe labelling position, but sheds at the same time light on the multiple factors affecting the sensitivity of SERS-based bioassays.
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Affiliation(s)
- Chiara Novara
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy.
| | - Daniel Montesi
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy
| | - Sofia Bertone
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy
| | - Niccolò Paccotti
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy
| | - Francesco Geobaldo
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy
| | - Marwan Channab
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy; Advanced Materials and Life Sciences, Istituto Nazionale di Ricerca Metrologica (INRiM), Strada delle Cacce 91, Turin 10135, Italy
| | - Angelo Angelini
- Advanced Materials and Life Sciences, Istituto Nazionale di Ricerca Metrologica (INRiM), Strada delle Cacce 91, Turin 10135, Italy
| | - Paola Rivolo
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy
| | - Fabrizio Giorgis
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy.
| | - Alessandro Chiadò
- Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy
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Nabihah Mohd Yusof Chan N, Idris A, Hazrin Zainal Abidin Z, Anuar Tajuddin H. White light emission from coumarin and rhodamine derivatives based on RGB multicomponent system. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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4
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Narayanam PK, Vishwakarma RK, Polaki S. Fabrication of Free Standing Graphene Oxide Membranes for Efficient Adsorptive Removal of Cationic Dyes. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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5
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Al-Otaibi JS, Sheena Mary Y, Shyma Mary Y, Kumar Trivedi R, Chakraborty B, Churchill DG. Theoretical SERS study of the strength and suitability of Cu12 nanostar for SERS: Complete theoretical studies, coinage metal SM12 comparisons, benzothiazole (BTH) adsorbent. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2022.113889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Yan M, Li M, Wang D, Chen H. Rapid determination of ethanol content based on an optical fiber-device and R6G-indicator. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:4122-4126. [PMID: 36219148 DOI: 10.1039/d2ay01319c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
A rapid method for the determination of ethanol content is proposed and tested. A fluorescence detecting system, with a multimode fiber (MMF) sensing head, is employed. Rhodamine 6G (R6G) is applied as the fluorescent indicator. In the R6G aqueous solution, the molecules aggregate at high concentration, causing fluorescence quenching. Nevertheless, aggregation and quenching rarely occur in ethanol. Taking an ethanol and water mixture as the solvent, the photoluminescence (PL) intensity reflects the aggregation degree and the ethanol content. Based on this phenomenon, the contents of the ethanol-water mixture were measured through PL intensity detection. A limit of detection (LOD) at ∼0.1 vol% level was obtained in the range of 0-100%. Commercial Chinese baijiu and rubbing alcohol were tested and the results obtained were consistent with the label values. The detecting system is compact and of low-cost, and the detecting method is rapid, accurate and repeatable. There is good prospect of applications for the determination of ethanol content on-site.
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Affiliation(s)
- Mingming Yan
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou, China.
| | - Minglu Li
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou, China.
| | - Dongning Wang
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou, China.
| | - Huifang Chen
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou, China.
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7
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Tsao CW, Zheng YS, Sun YS, Cheng YC. Surface-enhanced Raman scattering (SERS) spectroscopy on localized silver nanoparticle-decorated porous silicon substrate. Analyst 2021; 146:7645-7652. [PMID: 34806730 DOI: 10.1039/d1an01708j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Surface-enhanced Raman scattering (SERS) spectroscopy is a rapid and non-destructive optical detection method that has been applied in various applications. Recently, three-dimensional (3D) substrate-based silicon nanostructures have been widely used as SERS substrates due to their high detection sensitivity, repeatability, and reusability. This paper uses a simple and low-cost electroless etching deposition process to generate silver nanoparticle-decorated porous silicon (Ag-PS) substrates. We propose a contact deposition process to generate localized Ag-PS (LocAg-PS) for SERS analysis. Due to the hydrophilic LocAg-PS pad on the hydrophobic PS background, the sample droplets self-aligned to the predefined LocAg-PS pads and condensed into a higher local concentration for high sensitivity SERS detection without extensive search for the hot spot. The effects of critical fabrication parameters and SERS analysis on the LocAg-PS surface were evaluated.
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Affiliation(s)
- Chia-Wen Tsao
- Department of Mechanical Engineering, National Central University, Taoyuan 32001, Taiwan.
| | - You-Shan Zheng
- Department of Mechanical Engineering, National Central University, Taoyuan 32001, Taiwan.
| | - Ya-Sen Sun
- Department of Chemical and Materials Engineering, National Central University, Taoyuan 32001, Taiwan
| | - Yu-Che Cheng
- Proteomics Laboratory, Department of Medical Research, Cathay General Hospital, Taipei 10630, Taiwan.,School of Medicine, Fu-Jen Catholic University, New Taipei City 242062, Taiwan.,Department of Biomedical Sciences and Engineering, National Central University, Taoyuan 32001, Taiwan
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8
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Jimbo A, Nishikado Y, Imura K. Optical Field and Chemical Environment Near the Surface Modified Gold Nanoparticle Assembly Revealed by Two-Photon Induced Photoluminescence and Surface Enhanced Raman Scattering. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20210160] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Atsuko Jimbo
- Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan
| | - Yui Nishikado
- Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan
| | - Kohei Imura
- Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan
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9
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Gambucci M, Cambiotti E, Sassi P, Latterini L. Multilayer Gold-Silver Bimetallic Nanostructures to Enhance SERS Detection of Drugs. Molecules 2020; 25:molecules25153405. [PMID: 32731377 PMCID: PMC7436262 DOI: 10.3390/molecules25153405] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 07/24/2020] [Accepted: 07/27/2020] [Indexed: 01/20/2023] Open
Abstract
Surface-enhanced Raman scattering (SERS) is a widely used technique for drug detection due to high sensitivity and molecular specificity. The applicability and selectivity of SERS in the detection of specific drug molecules can be improved by gathering information on the specific interactions occurring between the molecule and the metal surface. In this work, multilayer gold-silver bimetallic nanorods (Au@Ag@AuNRs) have been prepared and used as platforms for SERS detection of specific drugs (namely promethazine, piroxicam, furosemide and diclofenac). The analysis of SERS spectra provided accurate information on the molecular location upon binding and gave some insight into molecule-surface interactions and selectivity in drug detection through SERS.
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10
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Beketov GV, Shynkarenko OV, Yukhymchuk VO. Optical arrangement for surface plasmon-assisted directional enhanced Raman scattering spectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 219:488-495. [PMID: 31077952 DOI: 10.1016/j.saa.2019.04.039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 04/17/2019] [Accepted: 04/17/2019] [Indexed: 06/09/2023]
Abstract
We present an optical arrangement for spectroscopy of enhanced Raman scattering assisted by surface plasmon resonance in continuous planar metallic films. Optical excitation of propagating surface plasmons (PSP) is aided by the hemispherical total internal reflectance prism in the Kretschmann geometry. In this geometry, the radiation produced by Raman scattering is directionally emitted inside the prism with the angular distribution in the shape of a hollow cone (the Kretschmann cone). The proposed configuration enables entire collection of the Kretschmann cone with the use of an elliptical mirror modified for enlarging the accessible angular range for both the incident beam and the scattered light. The spectroscopic performance of this arrangement was evaluated using the Rhodamine 6G dye as a surface enhanced Raman scattering (SERS) reporter. An evident difference in magnitudes of the enhancement factor for specific spectral lines as compared to SERS excitation by localized surface plasmon resonance (LSPR-SERS) was revealed. The origin of this difference is discussed in terms of expected distinctions between the PSP-assisted directional enhanced Raman scattering and the LSPR-SERS. Besides the spectroscopic applications, the proposed arrangement is also perfectly suited for simultaneous functioning as the SPR sensor. Integration of SERS spectroscopy with the SPR analysis shows promise as a platform for evolving an innovative analytical technique with enhanced potentialities in surface research, particularly in biochemical applications.
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Affiliation(s)
- Gennadii V Beketov
- V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences (NAS) of Ukraine, 41 pr. Nauky, 03028 Kyiv, Ukraine.
| | - Olena V Shynkarenko
- V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences (NAS) of Ukraine, 41 pr. Nauky, 03028 Kyiv, Ukraine
| | - Volodymyr O Yukhymchuk
- V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences (NAS) of Ukraine, 41 pr. Nauky, 03028 Kyiv, Ukraine.
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11
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Caro C, Quaresma P, Pereira E, Franco J, Pernia Leal M, García-Martín ML, Royo JL, Oliva-Montero JM, Merkling PJ, Zaderenko AP, Pozo D, Franco R. Synthesis and Characterization of Elongated-Shaped Silver Nanoparticles as a Biocompatible Anisotropic SERS Probe for Intracellular Imaging: Theoretical Modeling and Experimental Verification. NANOMATERIALS 2019; 9:nano9020256. [PMID: 30781838 PMCID: PMC6409692 DOI: 10.3390/nano9020256] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 02/01/2019] [Accepted: 02/09/2019] [Indexed: 01/07/2023]
Abstract
Progress in the field of biocompatible SERS nanoparticles has promising prospects for biomedical applications. In this work, we have developed a biocompatible Raman probe by combining anisotropic silver nanoparticles with the dye rhodamine 6G followed by subsequent coating with bovine serum albumin. This nanosystem presents strong SERS capabilities in the near infrared (NIR) with a very high (2.7 × 107) analytical enhancement factor. Theoretical calculations reveal the effects of the electromagnetic and chemical mechanisms in the observed SERS effect for this nanosystem. Finite element method (FEM) calculations showed a considerable near field enhancement in NIR. Using density functional quantum chemical calculations, the chemical enhancement mechanism of rhodamine 6G by interaction with the nanoparticles was probed, allowing us to calculate spectra that closely reproduce the experimental results. The nanosystem was tested in cell culture experiments, showing cell internalization and also proving to be completely biocompatible, as no cell death was observed. Using a NIR laser, SERS signals could be detected even from inside cells, proving the applicability of this nanosystem as a biocompatible SERS probe.
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Affiliation(s)
- Carlos Caro
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Carretera de Utrera Km 1, 41013 Seville, Spain.
- Departamento de Química, UCIBIO, REQUIMTE, Faculdade de Ciências, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal.
- CABIMER, Andalusian Center for Molecular Biology and Regenerative Medicine, Av. Americo Vespucio, 24, 41092 Sevilla, Spain.
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology, Junta de Andalucía, Universidad de Málaga, 29590 Málaga, Spain.
| | - Pedro Quaresma
- Departamento de Química e Bioquímica, LAQV-REQUIMTE, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal.
| | - Eulália Pereira
- Departamento de Química e Bioquímica, LAQV-REQUIMTE, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal.
| | - Jaime Franco
- CABIMER, Andalusian Center for Molecular Biology and Regenerative Medicine, Av. Americo Vespucio, 24, 41092 Sevilla, Spain.
- Department of Medical Biochemistry, Molecular Biology and Immunology, Universidad de Sevilla, Av. Sanchez Pizjuan, 4, 41009 Sevilla, Spain.
| | - Manuel Pernia Leal
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology, Junta de Andalucía, Universidad de Málaga, 29590 Málaga, Spain.
- Department of Organic and Pharmaceutical Chemistry, Universidad de Sevilla, 41012 Seville, Spain.
| | - Maria Luisa García-Martín
- BIONAND, Andalusian Centre for Nanomedicine and Biotechnology, Junta de Andalucía, Universidad de Málaga, 29590 Málaga, Spain.
| | - Jose Luis Royo
- Department of Biochemistry, Molecular Biology and Immunology, Universidad de Málaga, 29071 Málaga, Spain.
| | - Jose Maria Oliva-Montero
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Carretera de Utrera Km 1, 41013 Seville, Spain.
| | - Patrick Jacques Merkling
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Carretera de Utrera Km 1, 41013 Seville, Spain.
| | - Ana Paula Zaderenko
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Carretera de Utrera Km 1, 41013 Seville, Spain.
| | - David Pozo
- CABIMER, Andalusian Center for Molecular Biology and Regenerative Medicine, Av. Americo Vespucio, 24, 41092 Sevilla, Spain.
- Department of Medical Biochemistry, Molecular Biology and Immunology, Universidad de Sevilla, Av. Sanchez Pizjuan, 4, 41009 Sevilla, Spain.
| | - Ricardo Franco
- Departamento de Química, UCIBIO, REQUIMTE, Faculdade de Ciências, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal.
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Singh G, Sachdeva R, Rai B, Saini G. Structure and vibrational spectroscopic study of alpha-tocopherol. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.05.037] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Singh G, Mohanty BP, Saini GSS. Structure, spectra and antioxidant action of ascorbic acid studied by density functional theory, Raman spectroscopic and nuclear magnetic resonance techniques. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 155:61-74. [PMID: 26580511 DOI: 10.1016/j.saa.2015.11.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 10/27/2015] [Accepted: 11/03/2015] [Indexed: 06/05/2023]
Abstract
Structure, vibrational and nuclear magnetic resonance spectra, and antioxidant action of ascorbic acid towards hydroxyl radicals have been studied computationally and in vitro by ultraviolet-visible, nuclear magnetic resonance and vibrational spectroscopic techniques. Time dependant density functional theory calculations have been employed to specify various electronic transitions in ultraviolet-visible spectra. Observed chemical shifts and vibrational bands in nuclear magnetic resonance and vibrational spectra, respectively have been assigned with the help of calculations. Changes in the structure of ascorbic acid in aqueous phase have been examined computationally and experimentally by recording Raman spectra in aqueous medium. Theoretical calculations of the interaction between ascorbic acid molecule and hydroxyl radical predicted the formation of dehydroascorbic acid as first product, which has been confirmed by comparing its simulated spectra with the corresponding spectra of ascorbic acid in presence of hydrogen peroxide.
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Affiliation(s)
- Gurpreet Singh
- Department of Physics, Panjab University, Chandigarh 160 014, India
| | - B P Mohanty
- Department of Biophysics, Panjab University, Chandigarh 160 014, India
| | - G S S Saini
- Department of Physics, Panjab University, Chandigarh 160 014, India.
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14
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Hafuka A, Ding Q, Yamamura H, Yamada K, Satoh H. Interactions of dissolved humic substances with oppositely charged fluorescent dyes for tracer techniques. WATER RESEARCH 2015; 85:193-198. [PMID: 26318652 DOI: 10.1016/j.watres.2015.08.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Revised: 07/29/2015] [Accepted: 08/22/2015] [Indexed: 06/04/2023]
Abstract
To investigate interactions between oppositely charged fluorescent dyes and dissolved humic substances, fluorescence quenching of fluorescein and rhodamine 6G with dissolved humic substances was performed. Binding coefficients were obtained by the Stern-Volmer equation. The fluorescence of rhodamine 6G was largely quenched by the addition of humic acid and a non-linear Stern-Volmer plot was obtained. This strong quenching may be caused by the electrostatic interaction between cationic rhodamine 6G and humic acid and strengthened by the hydrophobic repulsion. In contrast, the quenching and interactive effects of dissolved humic substances for fluorescein were relatively weak.
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Affiliation(s)
- Akira Hafuka
- Department of Integrated Science and Engineering for Sustainable Society, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan.
| | - Qing Ding
- Division of Civil and Environmental Engineering, Graduate School of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan.
| | - Hiroshi Yamamura
- Department of Integrated Science and Engineering for Sustainable Society, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan.
| | - Koji Yamada
- Division of Environmental Materials Science, Graduate School of Environmental Science, Hokkaido University, North-10, West-5, Sapporo 060-0810, Japan.
| | - Hisashi Satoh
- Division of Environmental Engineering, Graduate School of Engineering, Hokkaido University, North-13, West-8, Sapporo 060-8628, Japan.
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Singh G, Dogra SD, Kaur S, Tripathi SK, Prakash S, Rai B, Saini GSS. Structure and vibrations of glutathione studied by vibrational spectroscopy and density functional theory. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 149:505-515. [PMID: 25978018 DOI: 10.1016/j.saa.2015.04.062] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 02/28/2015] [Accepted: 04/21/2015] [Indexed: 06/04/2023]
Abstract
The vibrational properties of glutathione have been investigated by infrared absorption and Raman spectroscopic techniques, and density functional theory calculations at the B3LYP/6-31+G(d,p) level. Assignments of all the experimentally observed vibrational bands have been done with the help of simulated vibrational spectra and potential energy distribution calculations of glutathione water cluster, which includes the effect of hydrogen bonding. Optimized molecular parameters of energy minimized structure have been compared with the available experimental values. Calculated molecular parameters of glutathione-water cluster match well with the experimental values. Some of the calculated molecular parameters and vibrational frequencies of vapor phase glutathione-water cluster suggest participation of some atoms of glutathione in hydrogen bonding. Experimentally observed UV-Visible absorption spectrum of glutathione has also been reported. Observed band at 203 nm has been assigned to electronic transitions calculated with time dependent density functional theory.
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Affiliation(s)
- Gurpreet Singh
- Department of Physics, Panjab University, Chandigarh 160 014, India
| | - Sukh Dev Dogra
- Diploma Wing, Chandigarh College of Engineering, Sector 26, Chandigarh, India
| | - Sarvpreet Kaur
- Department of Physics, Government College for Girls, Sector 11, Chandigarh, India
| | - S K Tripathi
- Department of Physics, Panjab University, Chandigarh 160 014, India
| | - Satya Prakash
- Department of Physics, Panjab University, Chandigarh 160 014, India
| | - Bimal Rai
- Department of Physics, Panjab University, Chandigarh 160 014, India
| | - G S S Saini
- Department of Physics, Panjab University, Chandigarh 160 014, India.
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Singh G, Abbas JM, Dogra SD, Sachdeva R, Rai B, Tripathi SK, Prakash S, Sathe V, Saini GSS. Vibrational and electronic spectroscopic studies of melatonin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 118:73-81. [PMID: 24041531 DOI: 10.1016/j.saa.2013.08.077] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2013] [Revised: 08/10/2013] [Accepted: 08/15/2013] [Indexed: 06/02/2023]
Abstract
We report the infrared absorption and Raman spectra of melatonin recorded with 488 and 632.8 nm excitations in 3600-2700 and 1700-70 cm(-1) regions. Further, we optimized molecular structure of the three conformers of melatonin within density functional theory calculations. Vibrational frequencies of all three conformers have also been calculated. Observed vibrational bands have been assigned to different vibrational motions of the molecules on the basis of potential energy distribution calculations and calculated vibrational frequencies. Observed band positions match well with the calculated values after scaling except NH stretching mode frequencies. It is found that the observed and calculated frequencies mismatch of NH stretching is due to intermolecular interactions between melatonin molecules.
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Affiliation(s)
- Gurpreet Singh
- Department of Physics, Panjab University, Chandigarh 160 014, India
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17
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Zakerhamidi M, Moghadam M, Karimi A. Aggregative properties of Rhodamine dyes in polyacrylamide hydrophilic gel media. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.09.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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18
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Zakerhamidi M, Karimi A. Hydrophilic gel composition effect on the molecular association and spectroscopic behavior of rhodamine B. CAN J CHEM 2012. [DOI: 10.1139/v2012-055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Electronic absorption spectra of rhodamine B dye in aqueous solutions and in a polyacrylamide hydrogel matrix with different structural compositions were studied at room temperature. The transport and the solute–solute interactions of rhodamine B in aqueous solutions across the hydrophilic gels were investigated via exploration of the spectral properties of the dye-loaded hydrogel. The nature of the dye pair interactions in these media was discussed using the Kasha exciton theory. In addition, the monomer–dimer equilibrium of rhodamine B molecules in hydrogels with different compositional percentages was studied by means of UV–vis spectroscopy and least-squares fitting methods.
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Affiliation(s)
- M.S. Zakerhamidi
- Research Institute for Applied Physics and Astronomy, University of Tabriz, Tabriz, Iran
| | - A. Karimi
- Research Institute for Applied Physics and Astronomy, University of Tabriz, Tabriz, Iran
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Zhang L, Li Z, Du X, Li R, Chang X. Simultaneous separation and preconcentration of Cr(III), Cu(II), Cd(II) and Pb(II) from environmental samples prior to inductively coupled plasma optical emission spectrometric determination. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 86:443-448. [PMID: 22115843 DOI: 10.1016/j.saa.2011.10.065] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2011] [Revised: 10/26/2011] [Accepted: 10/30/2011] [Indexed: 05/31/2023]
Abstract
We have developed a new method of the separation, preconcentration, and determination of Cr(III), Cu(II), Cd(II) and Pb(II) ion in water samples. It is based on the use of activated carbon that was modified with rhodamine 6G to yield a solid-phase sorbent. The experimental conditions for adsorption were optimized. Cr(III), Cu(II), Cd(II) and Pb(II) can be quantitatively adsorbed at pH 4, and adsorbed Cr(III), Cu(II), Cd(II) and Pb(II) can be completely eluted with 1M hydrochloric acid. The maximum adsorption capacity is 37.8, 47.8, 56.5 and 41.7 mg g(-1) for Cr(III), Cu(II), Cd(II) and Pb(II). Cr(III), Cu(II), Cd(II) and Pb(II) ions were then determined by inductively coupled plasma optical emission spectrometry. The detection limit (3σ) is under 0.35 ng mL(-1), and the relative standard deviation is lower than 3.5% (n=11). Common potentially interfering ions do not interfere with the adsorption and determination of the analytes. The method displays selectivity, sensitivity and reproducibility, and was successfully applied to the determination of biological and water samples.
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Affiliation(s)
- Li Zhang
- Department of Chemistry, Lanzhou University, Lanzhou 730000, PR China
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Ganbold EO, Park JH, Ock KS, Joo SW. Gold Nanoparticle-Based Detection of Hg(II) in an Aqueous Solution: Fluorescence Quenching and Surface-Enhanced Raman Scattering Study. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.2.519] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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