1
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Dash BR, Gardas RL, Mishra AK. Probing the heterogeneity of molecular level organization of ionic liquids: a comparative study using neutral Nile red and cationic Nile blue sulfate as fluorescent probes for butyrolactam-based protic ionic liquids. Phys Chem Chem Phys 2024; 26:13350-13363. [PMID: 38639928 DOI: 10.1039/d4cp00520a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
Ionic liquids (ILs) are liquid salts composed of cations and anions, known for their significant local heterogeneity at the molecular level. To understand the microheterogeneity with regard to their local polarity and local viscosity, we have used two structurally similar but chemically distinguishable fluorescent probes: Nile red (NR), a neutral molecule, and Nile blue sulfate (NBS), a charged molecule. A comparative study of the response of the two probes to the molecular level heterogeneity of ILs is expected to provide a better clarity of understanding regarding the charged polar domain and the uncharged hydrophobic domain of ILs. Towards this, we synthesized two butyrolactam-based protic ionic liquids (PILs), i.e., BTF and BTD, with the same ionic headgroup ([BT]+) and different alkyl tails ([RCOO]-), where {R = H, C11H23}. BTF has no significant hydrophobic domain, whereas BTD has a larger hydrophobic domain. Temperature-dependent fluorescence parameters such as fluorescence intensity, lifetime, and anisotropy were measured for both NR and NBS molecules. The use of a pair of structurally similar but ionically different probes enables differential estimation of parameters like the microviscosity of a domain using the fluorescence anisotropy parameter (r). The absorption and emission spectra of both probe molecules are observed to be blue shifted upon going from BTF to BTD. NR showed a significant blue shift in absorption and emission band maxima. Conversely, NBS exhibited a small wavelength shift, possibly influenced by the preferred location of their charged head group domain. Temperature-dependent rotational relaxation time (θ) of NR in BTD is smaller than that of NBS by 60-70%, indicating that stronger charge-charge interactions exist between the polar domain of BTD and NBS. Moreover, it is observed that the local viscosity of the BTF IL around both probes is similar, whereas there is a considerable difference for the BTD IL. These results are an indication that NBS being charged prefers to locate itself in the charged head group region of the IL, whereas NR being neutral tends to reside both in the hydrophobic domain and in the head group but is predominantly located in the hydrophobic domain.
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Affiliation(s)
- Bignya Rani Dash
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India.
| | - Ramesh L Gardas
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India.
| | - Ashok Kumar Mishra
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India.
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2
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Hsu CC, Rückel M, Bonn D, Brouwer AM. Super-resolution Fluorescence Imaging of Recycled Polymer Blends via Hydrogen Bond-Assisted Adsorption of a Nile Red Derivative. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:14652-14659. [PMID: 37788122 PMCID: PMC10586370 DOI: 10.1021/acs.langmuir.3c01976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 08/19/2023] [Indexed: 10/05/2023]
Abstract
A key challenge in the recycling of multilayer plastic films of polyethylene and polyamide, as typically used for food packaging, is to assess and control the phase separation of the two types of polymers in the recycled material, the specifics of which determine the mechanical strength of the recycled material. However, visualizing the polyamide-in-polyethylene domains with conventional fluorescence methods or electron microscopy is challenging. We present a new approach that combines the point accumulation in nanoscale topography (PAINT) super-resolution method with a newly synthesized Nile Red probe (diOHNR) as the fluorescent label. The molecule was modified to undergo a hydrogen bond-assisted interaction with the polyamide phase in the blend due to its two additional hydroxyl groups but preserves the spectral properties of Nile Red. As a result, the localization density of the probe in the PAINT image is 13 times larger at the polyamide phase than at the polyethylene phase, enabling quantitative evaluation of the spatial polyamide/polyethylene distribution down to the nanoscale. The method achieved a spatial resolution of 18.8 nm, and we found that over half of the polyamide particles in a recycled sample were smaller than the optical diffraction limit. Being able to image the blends with nanoscopic resolution can help to optimize the composition and mechanical properties of recycled materials and thus contribute to an increased reuse of plastics.
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Affiliation(s)
- Chao-Chun Hsu
- van’t
Hoff Institute for Molecular Sciences, University
of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Markus Rückel
- Group
Research, BASF SE, Ludwigshafen D-67056, Germany
| | - Daniel Bonn
- van
der Waals-Zeeman Institute, Institute of
Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Albert M. Brouwer
- van’t
Hoff Institute for Molecular Sciences, University
of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
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3
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Al-Azzawi MSM, Kunaschk M, Mraz K, Freier KP, Knoop O, Drewes JE. Digest, stain and bleach: Three steps to achieving rapid microplastic fluorescence analysis in wastewater samples. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 863:160947. [PMID: 36535480 DOI: 10.1016/j.scitotenv.2022.160947] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 12/11/2022] [Accepted: 12/11/2022] [Indexed: 06/17/2023]
Abstract
Efforts associated with common analytical techniques for microplastics including spectroscopic and thermo-analytical techniques are limiting the ability to perform large-scale monitoring of microplastics in the aquatic environment, because the analytical equipment required is costly and the analysis itself time consuming. Thus, there is a need to develop low cost, rapid alternative monitoring approaches. One possible alternative is the use of selective fluorescence staining of microplastic particles directly applied to environmental samples. However, to the best of our knowledge this has not yet been successfully implemented for wastewater samples. In this study, sludge samples are used as surrogates for wastewater alongside six different polymers to develop a combined sample preparation and staining protocol that could selectively stain microplastics without significant interference from the natural constituents of the sludge. Results confirmed that using Fenton's reagent to remove the organic matter before staining the sample with Nile red (NR) and subsequently bleaching it by sodium hypochlorite resulted in the best workflow to selectively stain microplastics and then analyze them in wastewater samples using fluorescence microscopy.
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Affiliation(s)
- Mohammed S M Al-Azzawi
- Chair of Urban Water Systems Engineering, Technical University of Munich, Garching, Germany
| | | | - Kristina Mraz
- Chair of Urban Water Systems Engineering, Technical University of Munich, Garching, Germany
| | | | - Oliver Knoop
- Chair of Urban Water Systems Engineering, Technical University of Munich, Garching, Germany
| | - Jörg E Drewes
- Chair of Urban Water Systems Engineering, Technical University of Munich, Garching, Germany.
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4
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Makhdoumi P, Pirsaheb M, Amin AA, Kianpour S, Hossini H. Microplastic pollution in table salt and sugar: occurrence, qualification and quantification and risk assessment. J Food Compost Anal 2023. [DOI: 10.1016/j.jfca.2023.105261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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5
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Development of an Inexpensive and Comparable Microplastic Detection Method Using Fluorescent Staining with Novel Nile Red Derivatives. ANALYTICA 2023. [DOI: 10.3390/analytica4010004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Fluorescent staining of microplastics as a detection method is consistently gaining importance in microplastics research, as it is fast, easy to use, and requires low technical effort. In this study, a complete procedure was developed, from sample collection to sample processing and detection, to measure microplastics with low cost and time requirements. The developed procedure was tested by measuring the microplastics in the effluent of a German wastewater treatment plant over a period of one year. The results show that the process is especially well suited to investigate temporal variations of microplastic contamination, which requires a large number of samples to be processed. Further, the precision and selectivity of the detection process could be improved by applying newly developed Nile red derivatives for fluorescent staining. A low budget modification of a microscope for fluorescent imaging is compared to a modification with precise optical bandpass filters. A script enabling automated microplastic detection and counting was developed, improving the accuracy and comparability of the process.
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6
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Huang Z, Hu B, Wang H. Analytical methods for microplastics in the environment: a review. ENVIRONMENTAL CHEMISTRY LETTERS 2023; 21:383-401. [PMID: 36196263 PMCID: PMC9521859 DOI: 10.1007/s10311-022-01525-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 07/21/2022] [Indexed: 05/06/2023]
Abstract
Microplastic pollution is a recently discovered threat to ecosystems requiring the development of new analytical methods. Here, we review classical and advanced methods for microplastic analysis. Methods include visual analysis, laser diffraction particle, dynamic light scattering, scanning electron microscopy, Fourier-transform infrared spectroscopy, Raman spectroscopy, thermal analysis, mass spectrometry, aptamer and in vitro selection, and flow cytometry.
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Affiliation(s)
- Zike Huang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083 China
| | - Bo Hu
- School of Engineering, The University of Edinburgh, Edinburgh, EH9 3JW UK
| | - Hui Wang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083 China
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7
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Chen Z, Li H, Sheng K, Dong X, Yuan J, Hao S, Li M, Bai R, Queneau Y, Sidorenko A, Huang J, Gu Y. Dipolar Modification in Heterogeneous Catalysts under Electron Beam Irradiation for the Conversion of Biomass-Derived Platform Molecules. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Zhiyan Chen
- Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan 430074, China
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Haozhe Li
- Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan 430074, China
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Keyan Sheng
- Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan 430074, China
| | - Xiaohan Dong
- Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan 430074, China
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Jushigang Yuan
- Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan 430074, China
| | - Shuai Hao
- Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan 430074, China
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Minghao Li
- Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan 430074, China
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Rongxian Bai
- Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan 430074, China
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yves Queneau
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (ICBMS), Université de Lyon, CNRS, Université Lyon 1, INSA Lyon, CPE Lyon, UMR 5246, Université Claude Bernard, Bâtiment Lederer, 1 Rue Victor Grignard, 69622 Villeurbanne, France
| | - Alexander Sidorenko
- Institute of Chemistry of New Materials of National Academy of Sciences of Belarus, Skaryna str, 36, 220084 Minsk, Belarus
| | - Jiang Huang
- Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan 430074, China
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yanlong Gu
- Huazhong University of Science and Technology, 1037 Luoyu Road, Hongshan District, Wuhan 430074, China
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
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8
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Wang C, Jiang L, Liu R, He M, Cui X, Wang C. Comprehensive assessment of factors influencing Nile red staining: Eliciting solutions for efficient microplastics analysis. MARINE POLLUTION BULLETIN 2021; 171:112698. [PMID: 34245991 DOI: 10.1016/j.marpolbul.2021.112698] [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] [Received: 12/07/2020] [Revised: 06/30/2021] [Accepted: 07/01/2021] [Indexed: 06/13/2023]
Abstract
Monitoring microplastics in the environment based on the Nile red staining protocol has proven to be a newly emerged method in several instances. However, the methodology is still having the limitations of susceptibility, indiscrimination, and complexity, etc. The objectives of this paper are to explore the effects of wavelength, temperature, H2O2 and NaCl addition, plastic property, and fluorescent index on the Nile red staining in microplastics analysis and propose solutions to these inadequacies. Sample co-stained with H2O2 (ωfinal = 10%) and NaCl (ωfinal = 8.8%) will lower the fluorescence intensity of biogenic materials and reduce their interferences. Based on the fluorescence color and intensity of fused fluorographs, the combined fluorescent index for twelve microplastics was significantly different, thus could be preliminarily distinguished. An elevated staining temperature is propitious to fluorescent tagging with Nile Red. Finally, an improved protocol was proposed, which made the methodology streamlined in microplastics analysis.
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Affiliation(s)
- Chun Wang
- Jiangsu Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, China
| | - Lijuan Jiang
- Jiangsu Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, China
| | - Ruiqing Liu
- Jiangsu Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, China
| | - Meilin He
- Jiangsu Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing 210095, China.
| | - Xiaoyu Cui
- Jiangsu Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, China
| | - Changhai Wang
- Jiangsu Key Laboratory of Marine Biology, College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, China; Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing 210095, China; Co-Innovation Center for Jiangsu Marine Bio-Industry Technology, Lianyungang 222005, China.
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9
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Lee S, Lee TG. A novel method for extraction, quantification, and identification of microplastics in CreamType of cosmetic products. Sci Rep 2021; 11:18074. [PMID: 34508145 PMCID: PMC8433340 DOI: 10.1038/s41598-021-97557-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 08/25/2021] [Indexed: 11/13/2022] Open
Abstract
The objective of this study was to develop an accessible and accurate analysis method for microplastics that have been unintentionally added to cream cosmetic products. An experiment was performed on three cleansing creams in rich and viscous formulations. A spiked sample was prepared by adding polyethylene (PE) microspheres to the cleansing creams. After removing cosmetic ingredients from the creams using chemical digestion, damage to the PE microspheres was identified using Fourier transform infrared (FT-IR) spectroscopy. Field emission scanning electron microscopy (FE-SEM) images were obtained before and after digestion and used to characterize the morphology of the PE microspheres. The highest digestion efficiency was obtained using a chemical digestion method consisting of heating and stirring a sample in a 10 wt% KOH solution at 55 °C and 300 rpm for 5 days and did not damage the PE microspheres. The Nile red (9-diethylamino-5H-benzo[α]phenoxazine-5-one) staining method was effective in identifying small microplastics (< 106 μm). The optimal staining conditions are 5 μg/ml Nile red in n-hexane for green wavelengths.
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Affiliation(s)
- Soohyun Lee
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Korea
| | - Tai Gyu Lee
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Korea.
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10
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Lee J, Chae KJ. A systematic protocol of microplastics analysis from their identification to quantification in water environment: A comprehensive review. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:124049. [PMID: 33265057 DOI: 10.1016/j.jhazmat.2020.124049] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/27/2020] [Accepted: 09/18/2020] [Indexed: 06/12/2023]
Abstract
With microplastics (MPs) being detected in aquatic environments, numerous studies revealed that they caused severe environmental issues, including damage to ecosystems and human health. MPs transport persistent organic pollutants by adsorbing them, and in nanoplastics this phenomenon is exacerbated by increased surface area. Despite their environmental risk, systematic protocol for qualitative and quantitative analysis are yet to be established in environmental analytical chemistry. Current analytical technologies on MP identification have technological limits with regard to detecting small sized particles (<1 µm), underestimation of MPs with organic contaminants, and physico-chemically altered particles by weathering and photo degradation. According to the published works, MPs are spread in living organisms through the food web, and are even detected in bottled water. To determine its eco-toxicity and removal by biodegradation, its accuracy, reliability, and reproducibility should be ensured by establishing a systematic protocol of MP identification. This review compares procedures, applicability, and limitations of Fourier transform infrared spectroscopy, Raman spectroscopy, and thermo-analytical methods for identifying MPs. Finally, it suggests systematic protocols for MPs analysis.
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Affiliation(s)
- Jieun Lee
- Department of Environmental Engineering, Korea Maritime and Ocean University, 727 Taejong-ro, Yeongdo-gu, Busan 49112, South Korea
| | - Kyu-Jung Chae
- Department of Environmental Engineering, Korea Maritime and Ocean University, 727 Taejong-ro, Yeongdo-gu, Busan 49112, South Korea.
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11
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Microplastics in Mediterranean Coastal Countries: A Recent Overview. JOURNAL OF MARINE SCIENCE AND ENGINEERING 2021. [DOI: 10.3390/jmse9010098] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The aim of this paper is to present information gathered from studies regarding the current status and challenges of microplastics (MPs) in Mediterranean coastal counties. MPs are considered emerging pollutants, and their effect on fish and on the final consumer through the trophic food chain are of great concern. Studies from almost all of the Mediterranean coastal countries are gathered and discussed. The source of MPs, as well as their transfer and accumulation are reviewed. In addition, the laboratory techniques for sampling, analysis and characterization of MPs are presented. Moreover, the current regulations for MPs restrictions in Europe will be discussed. Finally, the authors present the current challenges on the topic and provide recommendations for future work.
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12
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The potential of fluorescent dyes-comparative study of Nile red and three derivatives for the detection of microplastics. Anal Bioanal Chem 2021; 413:1059-1071. [PMID: 33415434 DOI: 10.1007/s00216-020-03066-w] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 11/03/2020] [Accepted: 11/12/2020] [Indexed: 10/22/2022]
Abstract
During the last years, microplastics in the environment came to the fore in environmental science research. For an appropriate risk assessment, it is essential to know the levels of microplastic contamination in the environment. In the field of microplastic detection, extensive research has been carried out in recent years. While common methods such as Raman spectroscopy and pyrolysis GC-MS are time-consuming and require trained staff and expensive equipment, there is the need for a cheap and easily applicable method. Staining microplastics with the fluorescent dye Nile red (NR) has a high potential to fulfill these criteria. In our work, we tested Nile red and newly developed derivatives, with the aim of achieving greater selectivity for plastic particles and more intense fluorescence. In addition, the influence of using different solvents and water at different pH values in the dyeing process was investigated by analyzing solid sample fluorescence spectra of dyed microplastics and natural particles. Finally, the method developed from the acquired knowledge was tested for sea salt. Graphical abstract.
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13
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Photophysics and rotational dynamics of Nile red in room temperature ionic liquid (RTIL) and RTIL-cosolvents binary mixtures. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112550] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Synak A, Bojarski P, Grobelna B, Kułak L, Szczepańska E, Mońka M. Concentration - dependent fluorescence properties of Nile Red in TiO2 based thin films. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Khatri V, Bhatia S, Deep S, Kohli E, Haag R, Senapati NN, Prasad AK. Exploring hydrophobic diastereomeric 2,6-anhydro-glycoheptitols for their enzymatic polymerization with PEG: towards delivery applications. NEW J CHEM 2020. [DOI: 10.1039/d0nj02642e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Two sugar PEG-based amphiphilic copolymers have been synthesized by Novozym®-435-catalyzed greener solvent free transesterification reaction of diastereomeric 2,6-anhydro-glucoheptitol and 2,6-anhydro-mannoheptitol with PEG-1000 diethyl ester.
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Affiliation(s)
- Vinod Khatri
- Bioorganic Laboratory, Department of Chemistry, University of Delhi
- Delhi 110 007
- India
- Department of Chemistry, Pt. Neki Ram Sharma Government College
- Rohtak-124001
| | - Sumati Bhatia
- Institute for Chemistry and Biochemistry, Free University Berlin
- 14195 Berlin
- Germany
| | - Satyanarayan Deep
- Bioorganic Laboratory, Department of Chemistry, University of Delhi
- Delhi 110 007
- India
- DRDO, DIPAS
- Timarpur
| | | | - Rainer Haag
- Institute for Chemistry and Biochemistry, Free University Berlin
- 14195 Berlin
- Germany
| | | | - Ashok K. Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi
- Delhi 110 007
- India
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16
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Yadigarli A, Song Q, Druzhinin SI, Schönherr H. Probing of local polarity in poly(methyl methacrylate) with the charge transfer transition in Nile red. Beilstein J Org Chem 2019; 15:2552-2562. [PMID: 31728169 PMCID: PMC6839560 DOI: 10.3762/bjoc.15.248] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 09/25/2019] [Indexed: 01/05/2023] Open
Abstract
The permittivity of polymers and its spatial distribution play a crucial role in the behavior of thin films, such as those used, e.g., as sensor coatings. In an attempt to develop a conclusive approach to determine these quantities, the polarity of the model polymer poly(methyl methacrylate) (PMMA) in 600 nm thin films on a glass support was probed by the energy of the charge transfer transition in the oxazine dye Nile red (NR) at 25 °C. The absorption and fluorescence spectra of NR were observed to shift to the red with increasing solvent polarity, because of the intramolecular charge transfer character of the optical transition. New types of solvatochromic plots of emission frequency against absorption frequency and vice versa afforded the Onsager radius-free estimation of the ground and excited states dipole moment ratio. With this approach the values of these dipole moments of 11.97 D and 18.30–19.16 D, respectively, were obtained for NR. An effective local dielectric constant of 5.9–8.3 for PMMA thin films was calculated from the solvatochromic plot and the fluorescence maximum of NR observed in the PMMA films. The fluorescence band of NR in the rigid PMMA films shifted to the red by 130 cm−1 with increasing excitation wavelength from 470 to 540 nm, while in a series of liquids the position of the emission maximum of NR remained constant within same range of the excitation wavelength. It is concluded that the fluorescence spectrum of NR in PMMA undergoes inhomogeneous broadening due to different surroundings of NR molecules in the ground state and slow sub-glass transition (Tg) relaxations in PMMA.
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Affiliation(s)
- Aydan Yadigarli
- Physical Chemistry I and Research Center of Micro and Nanochemistry and Engineering (Cμ), Department of Chemistry and Biology, University of Siegen, Adolf-Reichwein-Str. 2, 57076, Siegen, Germany
| | - Qimeng Song
- Physical Chemistry I and Research Center of Micro and Nanochemistry and Engineering (Cμ), Department of Chemistry and Biology, University of Siegen, Adolf-Reichwein-Str. 2, 57076, Siegen, Germany
| | - Sergey I Druzhinin
- Physical Chemistry I and Research Center of Micro and Nanochemistry and Engineering (Cμ), Department of Chemistry and Biology, University of Siegen, Adolf-Reichwein-Str. 2, 57076, Siegen, Germany
| | - Holger Schönherr
- Physical Chemistry I and Research Center of Micro and Nanochemistry and Engineering (Cμ), Department of Chemistry and Biology, University of Siegen, Adolf-Reichwein-Str. 2, 57076, Siegen, Germany
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17
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Krause S, Vosch T. Stokes shift microscopy by excitation and emission imaging. OPTICS EXPRESS 2019; 27:8208-8220. [PMID: 31052643 DOI: 10.1364/oe.27.008208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 03/02/2019] [Indexed: 06/09/2023]
Abstract
In this contribution, we present a new method, based on a tunable excitation laser source and a robust common path interferometer in the detection channel. Its purpose is to image spectral excitation and emission information on a monochrome complementary metal oxide semiconductor (CMOS) camera. This allows us to spatially obtain both excitation and emission spectra of the whole imaged area and create derived images such as red-green-blue (RGB), excitation and emission maxima, and Stokes shift images. Our presented method is a further development of hyperspectral imaging that usually is limited to recording spatially resolved emission spectra. Taking advantage of the full camera chip should speed up the acquisition versus line scan or pointwise hyperspectral imaging.
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18
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Swain J, Mishra J, Ghosh G, Mishra AK. Quantification of micropolarity and microviscosity of aggregation and salt-induced gelation of sodium deoxycholate (NaDC) using Nile red fluorescence. Photochem Photobiol Sci 2019; 18:2773-2781. [DOI: 10.1039/c9pp00293f] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Nile red fluorescence properties can be used for the estimation of micropolarity and microviscosity of the gel medium.
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Affiliation(s)
- Jitendriya Swain
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600 036
- India
| | - Jhili Mishra
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600 036
- India
| | - Goutam Ghosh
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600 036
- India
| | - Ashok Kumar Mishra
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600 036
- India
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19
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Caballero-Mancebo E, Cohen B, Moreno JM, Corma A, Díaz U, Douhal A. Exploring the Photodynamics of a New 2D-MOF Composite: Nile Red@Al-ITQ-HB. ACS OMEGA 2018; 3:1600-1608. [PMID: 31458482 PMCID: PMC6641383 DOI: 10.1021/acsomega.7b01718] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 01/22/2018] [Indexed: 06/08/2023]
Abstract
In this work, we unravel the photodynamics of Nile Red (NR) interacting with Al-ITQ-HB nanostructure, a new layer-type metal-organic framework (MOF) with potential catalytic and photonic applications. Steady-state spectroscopy reveals the presence of NR monomers and aggregates when interacting with the MOF structure. Time-resolved experiments provide emission lifetimes of the interacting monomers, H- and J-type aggregates. We observed contributions from two monomer populations having different environments. One monomer species emits from the local-excited state and another from a photoproduced charge-separated state resulting from an ultrafast intramolecular charge transfer (ICT). Femtosecond fluorescence experiments reveal that the ICT process occurs in ∼1 ps. Fluorescence microscopy on single crystals and agglomerates of the composites shows a homogenous distribution of the dye lifetimes within the material. This study shows that the photobehavior of NR in Al-ITQ-HB MOF is dictated by its location within the material. The reported findings using a well-known polarity probe and a new two-dimensional MOF provide information on the microenvironment of this material, which may help for designing smart MOFs with potential applications in photonics and nanocatalysis.
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Affiliation(s)
- Elena Caballero-Mancebo
- Departamento
de Química Física, Facultad de Ciencias Ambientales
y Bioquímica, and INAMOL, Universidad
de Castilla-La Mancha, Avenida Carlos III, S/N, 45071 Toledo, Spain
| | - Boiko Cohen
- Departamento
de Química Física, Facultad de Ciencias Ambientales
y Bioquímica, and INAMOL, Universidad
de Castilla-La Mancha, Avenida Carlos III, S/N, 45071 Toledo, Spain
| | - José María Moreno
- Instituto
de Tecnología Química, Universitat
Politecnica de Valéncia-Consejo Superior de Investigaciones
Científicas (UPV-CSIC), Av. de los Naranjos s/n, 46022 Valencia, Spain
| | - Avelino Corma
- Instituto
de Tecnología Química, Universitat
Politecnica de Valéncia-Consejo Superior de Investigaciones
Científicas (UPV-CSIC), Av. de los Naranjos s/n, 46022 Valencia, Spain
| | - Urbano Díaz
- Instituto
de Tecnología Química, Universitat
Politecnica de Valéncia-Consejo Superior de Investigaciones
Científicas (UPV-CSIC), Av. de los Naranjos s/n, 46022 Valencia, Spain
| | - Abderrazzak Douhal
- Departamento
de Química Física, Facultad de Ciencias Ambientales
y Bioquímica, and INAMOL, Universidad
de Castilla-La Mancha, Avenida Carlos III, S/N, 45071 Toledo, Spain
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20
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Swain J, Mishra AK. Nile red fluorescence for quantitative monitoring of micropolarity and microviscosity of pluronic F127 in aqueous media. Photochem Photobiol Sci 2018; 15:1400-1407. [PMID: 27714310 DOI: 10.1039/c6pp00123h] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photophysical behaviour and excited state decay kinetics of the fluorescent probe Nile red were used for quantitative monitoring of micropolarity, microviscosity and the sol-gel transition temperature of a copolymer hydrogel, pluronic F127. There was considerable enhancement of the emission intensity with a large blue shift in emission and an absorption maximum at and above the sol-gel transition temperature (20 °C), showing the sensitivity of Nile red fluorescence to the sol-gel transition. The estimation of micropolarity by comparing the Nile red emission maximum in dioxane-water mixtures suggested a considerable decrease in the polarity of the PF127 microenvironment from less polar (20% dioxane-water) in its sol phase to almost non-polar (90% dioxane-water) microenvironments in the gel phase. The thermotropic response of the wavelength dependent fluorescence lifetime of the probe with a rise time in the longer wavelength region has enabled monitoring of the microheterogeneity of the gel medium. With an increase in temperature, the microviscosity progressively increases from ∼10 mPa s (sol state) to ∼23 mPa s (gel state). The mismatch between microviscosity as estimated by the Nile red and the corresponding bulk viscosity reflected the microheterogeneity of the pluronic medium and its sensitivity towards PF127 microenvironments.
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Affiliation(s)
- Jitendriya Swain
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India.
| | - Ashok Kumar Mishra
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India.
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21
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Ren Y, Banishev AA, Suslick KS, Moore JS, Dlott DD. Ultrafast Proton Transfer in Polymer Blends Triggered by Shock Waves. J Am Chem Soc 2017; 139:3974-3977. [PMID: 28251850 DOI: 10.1021/jacs.7b00876] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We describe ultrafast proton transfer in the ground electronic state triggered by the use of shock waves created by high-speed impacts. The emission of Nile Red (NR), a polarity sensing dye, was used to probe the effects of shock compression in a series of polymers, including polymer Brønsted bases blended with organic acid proton donors. NR undergoes a shock-induced red-shift due to an increase both in density and in polymer polarity. In blends with poly(4-vinylpyridine) (PVP) and phenol, NR showed an excess shock-induced red-shift with a distinct time dependence not present in controls that are incapable of proton transfer. The excess red-shift first appeared with 0.8 km·s-1 impacts. Occurring in ca. 10 ns, this NR red-shift was caused by the formation of an ion pair created by shock-triggered proton transfer from phenol to PVP.
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Affiliation(s)
- Yi Ren
- Department of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Alexandr A Banishev
- Department of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Kenneth S Suslick
- Department of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Jeffrey S Moore
- Department of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Dana D Dlott
- Department of Chemistry and ‡Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
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22
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Shim WJ, Song YK, Hong SH, Jang M. Identification and quantification of microplastics using Nile Red staining. MARINE POLLUTION BULLETIN 2016; 113:469-476. [PMID: 28340965 DOI: 10.1016/j.marpolbul.2016.10.049] [Citation(s) in RCA: 254] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 10/15/2016] [Accepted: 10/18/2016] [Indexed: 05/06/2023]
Abstract
We investigated the applicability of Nile Red (NR), a fluorescent dye, for microplastic analysis, and determined the optimal staining conditions. Five mg/L NR solution in n-hexane effectively stained plastics, and they were easily recognized in green fluorescence. The NR staining method was successfully applied to micro-sized polyethylene, polypropylene, polystyrene, polycarbonate, polyurethane, and poly(ethylene-vinyl acetate), except for polyvinylchloride, polyamide and polyester. The recovery rate of polyethylene (100-300μm) spiked to pretreated natural sand was 98% in the NR stating method, which was not significantly (p<0.05) different with FT-IR identification. The NR staining method was suitable for discriminating fragmented polypropylene particles from large numbers of sand particles in laboratory weathering test samples. The method is straightforward and quick for identifying and quantifying polymer particles in the laboratory controlled samples. Further studies, however, are necessary to investigate the application of NR staining to field samples with organic remnants.
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Affiliation(s)
- Won Joon Shim
- Oil and POPs Research Laboratory, Korea Institute of Ocean Science and Technology, 41 Jangmok-1-gil, Geoje 53201, Republic of Korea; Department of Marine Environmental Sciences, Korea University of Science and Technology, Gajeong-ro, Daejeon 34113, Republic of Korea.
| | - Young Kyoung Song
- Oil and POPs Research Laboratory, Korea Institute of Ocean Science and Technology, 41 Jangmok-1-gil, Geoje 53201, Republic of Korea; Department of Marine Environmental Sciences, Korea University of Science and Technology, Gajeong-ro, Daejeon 34113, Republic of Korea
| | - Sang Hee Hong
- Oil and POPs Research Laboratory, Korea Institute of Ocean Science and Technology, 41 Jangmok-1-gil, Geoje 53201, Republic of Korea; Department of Marine Environmental Sciences, Korea University of Science and Technology, Gajeong-ro, Daejeon 34113, Republic of Korea
| | - Mi Jang
- Oil and POPs Research Laboratory, Korea Institute of Ocean Science and Technology, 41 Jangmok-1-gil, Geoje 53201, Republic of Korea; Department of Marine Environmental Sciences, Korea University of Science and Technology, Gajeong-ro, Daejeon 34113, Republic of Korea
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23
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Jana B, Bhattacharyya S, Patra A. Functionalized dye encapsulated polymer nanoparticles attached with a BSA scaffold as efficient antenna materials for artificial light harvesting. NANOSCALE 2016; 8:16034-16043. [PMID: 27546792 DOI: 10.1039/c6nr05201k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A potential strategy for a new generation light harvesting system is multi-chromophoric donor-acceptor pairs where light energy is absorbed by an antenna complex and subsequently transfers its energy to the acceptor via energy transfer. Here, we design a system of a functionalized polymer nanoparticle-protein scaffold for efficient light harvesting and white light generation where a dye doped polymer nanoparticle acts as a donor and a dye encapsulated BSA protein acts as an acceptor. Analysis reveals that 91.3% energy transfer occurs from the dye doped polymer nanoparticle to the dye encapsulated BSA protein. The antenna effect of this light harvesting system is found to be 31 at a donor to acceptor ratio of 0.82 : 1 which is unprecedented. The enhanced effective molar extinction coefficient of the acceptor dye is potential for the light harvesting system. Bright white light emission with a quantum yield of 14% under single wavelength excitation is obtained by changing the ratio of donor to acceptor. Analysis reveals that the efficient energy transfer in this polymer-protein assembly may open up new possibilities in designing artificial light harvesting systems for future applications.
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Affiliation(s)
- Bikash Jana
- Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata, 700 032, India.
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24
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Koh M, Kim WS, Lee M. Exploration of a New Solvatochromic Dye Bearing the Excited-State Intramolecular Proton Transfer Functionality. B KOREAN CHEM SOC 2016. [DOI: 10.1002/bkcs.10723] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Moonjee Koh
- Department of Chemistry and Nanoscience; Ewha Womans University; Seoul 120-750 Republic of Korea
| | - Won-Suk Kim
- Department of Chemistry and Nanoscience; Ewha Womans University; Seoul 120-750 Republic of Korea
| | - Minyung Lee
- Department of Chemistry and Nanoscience; Ewha Womans University; Seoul 120-750 Republic of Korea
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25
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Joshi NK, Polgar AM, Steer RP, Paige MF. White light generation using Förster resonance energy transfer between 3-hydroxyisoquinoline and Nile Red. Photochem Photobiol Sci 2016; 15:609-17. [DOI: 10.1039/c6pp00005c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A simple mixture of 3-hydroxyisoquinoline with Nile Red in a polymeric matrix of polyvinyl alcohol is used to generate white light that is suitable for lighting applications through a fluorescence resonance energy transfer mechanism.
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Affiliation(s)
- Neeraj K. Joshi
- Department of Chemistry
- University of Saskatchewan
- Saskatoon
- Canada
| | | | - Ronald P. Steer
- Department of Chemistry
- University of Saskatchewan
- Saskatoon
- Canada
| | - Matthew F. Paige
- Department of Chemistry
- University of Saskatchewan
- Saskatoon
- Canada
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26
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Guido CA, Jacquemin D, Adamo C, Mennucci B. Electronic Excitations in Solution: The Interplay between State Specific Approaches and a Time-Dependent Density Functional Theory Description. J Chem Theory Comput 2015; 11:5782-90. [DOI: 10.1021/acs.jctc.5b00679] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Ciro A. Guido
- Dipartimento
di Chimica e Chimica Industriale, Università di Pisa, Via Moruzzi
13, 56124 Pisa, Italy
| | - Denis Jacquemin
- Laboratoire
CEISAM - UMR CNRS 6230, Université de Nantes, 2 Rue de la
Houssinière, BP 92208, 44322 Nantes Cedex 3, France
- Institut Universitaire de France, 103, bd. Saint-Michel, F-75005 Paris Cedex 05, France
| | - Carlo Adamo
- Institut Universitaire de France, 103, bd. Saint-Michel, F-75005 Paris Cedex 05, France
- Institut
de Recherche Chimie Paris, PSL University Chimie ParisTech CNRS, 11 rue P. et M. Curie, F-75005 Paris, France
| | - Benedetta Mennucci
- Dipartimento
di Chimica e Chimica Industriale, Università di Pisa, Via Moruzzi
13, 56124 Pisa, Italy
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27
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Martin C, Bhattacharyya S, Patra A, Douhal A. Single and multistep energy transfer processes within doped polymer nanoparticles. Photochem Photobiol Sci 2015; 13:1241-52. [PMID: 24969364 DOI: 10.1039/c4pp00086b] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Herein, we demonstrate the design of multiple fluorophores Coumarin 153 (C153) and Nile Red (NR) encapsulated in semiconducting poly[N-vinylcarbazole] (PVK) polymer nanoparticles (50-70 nm in diameter) by a simple re-precipitation technique, and elucidate their photophysical properties by steady-state and picosecond (ps) time resolved emission spectroscopy. It is interesting to note that multistep cascaded energy transfer occurs from the excited host PVK molecules to NR dye molecules through C153. The energy transfer time constants are found to be 180 ps for PVK→C153, 360 ps for PVK→NR, and 140 ps for the overall energy transfer process from PVK to NR through C153 dye molecules. The multistep energy transfer allows tuning of the wide range emission from 350 nm to 700 nm by changing the relative concentrations of the encapsulated dye molecules. Bright, stable, and white light emission of the dye doped polymer nanoparticles with a quantum yield of 14% is achieved at a particular concentration ratio of the C153 : NR dye. The generation of "cool" white emission in suspension and in the solid state film opens up new possibilities to obtain white light OLEDs based on single nanoparticles.
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Affiliation(s)
- Cristina Martin
- Departamento de Química Física, Facultad de Ciencias del Medio Ambiente y Bioquímica e INAMOL, Universidad de Castilla-La Mancha, Avda. Carlos III, S.N., 45071 Toledo, Spain.
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28
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Magenau AJD, Richards JA, Pasquinelli MA, Savin DA, Mathers RT. Systematic Insights from Medicinal Chemistry To Discern the Nature of Polymer Hydrophobicity. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01758] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Andrew J. D. Magenau
- Materials
Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States
| | - Jeffrey A. Richards
- Department
of Chemistry, Pennsylvania State University, New Kensington, Pennsylvania 15068, United States
| | - Melissa A. Pasquinelli
- Fiber
and Polymer Science Program, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Daniel A. Savin
- Department
of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Robert T. Mathers
- Department
of Chemistry, Pennsylvania State University, New Kensington, Pennsylvania 15068, United States
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29
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Kumari M, Billamboz M, Leonard E, Len C, Böttcher C, Prasad AK, Haag R, Sharma SK. Self-assembly, photoresponsive behavior and transport potential of azobenzene grafted dendronized polymeric amphiphiles. RSC Adv 2015. [DOI: 10.1039/c5ra08047a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An azobenzene based light responsive polymeric system was developed to study the transport potential and photo-controlled release of encapsulated guests.
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Affiliation(s)
- Meena Kumari
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
| | - Muriel Billamboz
- Sorbonne Universités
- Université de Technologie de Compiègne
- Ecole Supérieure de Chimie Organique et Minérale
- Centre de Recherche Royallieu
- F-60203 Compiègne
| | - Estelle Leonard
- Sorbonne Universités
- Université de Technologie de Compiègne
- Ecole Supérieure de Chimie Organique et Minérale
- Centre de Recherche Royallieu
- F-60203 Compiègne
| | - Christophe Len
- Sorbonne Universités
- Université de Technologie de Compiègne
- Ecole Supérieure de Chimie Organique et Minérale
- Centre de Recherche Royallieu
- F-60203 Compiègne
| | - Christoph Böttcher
- Forschungszentrum für Elektronenmikroskopie
- Institut für Chemie und Biochemie
- Freie Universität Berlin
- 14195 Berlin
- Germany
| | | | - Rainer Haag
- Institut für Chemie und Biochemie
- Freie Universität Berlin
- 14195 Berlin
- Germany
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30
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Piskorski J, Patterson D, Eibenberger S, Doyle JM. Cooling, Spectroscopy and Non-Sticking oftrans-Stilbene and Nile Red. Chemphyschem 2014; 15:3800-4. [DOI: 10.1002/cphc.201402502] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Indexed: 11/11/2022]
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31
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Martín C, di Nunzio MR, Cohen B, Douhal A. Location and freedom of single and double guest in dye-doped polymer nanoparticles. Photochem Photobiol Sci 2014; 13:1580-9. [DOI: 10.1039/c4pp00203b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report on time-resolved fluorescence anisotropy studies of poly(9-vinylcarbazole) (PVK) nanoparticles (NPs) encapsulating Coumarin 153 (C153) and Nile Red (NR).
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Affiliation(s)
- Cristina Martín
- Departamento de Química Física
- Facultad de Ciencias Ambientales y Bioquímica
- and INAMOL
- Universidad de Castilla-La Mancha
- 45071 Toledo, Spain
| | - Maria Rosaria di Nunzio
- Departamento de Química Física
- Facultad de Ciencias Ambientales y Bioquímica
- and INAMOL
- Universidad de Castilla-La Mancha
- 45071 Toledo, Spain
| | - Boiko Cohen
- Departamento de Química Física
- Facultad de Ciencias Ambientales y Bioquímica
- and INAMOL
- Universidad de Castilla-La Mancha
- 45071 Toledo, Spain
| | - Abderrazzak Douhal
- Departamento de Química Física
- Facultad de Ciencias Ambientales y Bioquímica
- and INAMOL
- Universidad de Castilla-La Mancha
- 45071 Toledo, Spain
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32
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Lee Y, Kim YL, Kim MH, Lee M. Influence of matrix rigidity on the internal twisting of electronically excited thioflavin T in polymer nanostructures. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.10.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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33
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Locatelli-Champagne C, Cloitre M. Monitoring mesoglobules formation in PNIPAm solutions using Nile Red solvatochromism. Colloid Polym Sci 2013. [DOI: 10.1007/s00396-013-3035-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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34
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35
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Jana B, Ghosh S, Chattopadhyay N. Competitive binding of nile red between lipids and β-cyclodextrin. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2013; 126:1-10. [PMID: 23871993 DOI: 10.1016/j.jphotobiol.2013.06.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 06/10/2013] [Accepted: 06/11/2013] [Indexed: 11/30/2022]
Abstract
Fluorometric measurements are exploited to explore the binding interactions of nile red (NR) with anionic lipid dimyristoyl-L-α-phosphatidylglycerol (DMPG), zwitterionic lipid dimyristoyl-L-α-phosphatidylcholine (DMPC) as well as neutral cyclic oligosaccharide β-cyclodextrin (β-CD) solutions. The binding constants are found to be quite high and comparable (within a factor of five). Series of spectral techniques like steady state fluorescence and fluorescence anisotropy study, micropolarity study, quenching study and time resolved experiments reveal that the addition of β-CD to the probe-lipid complexes results in weakening of the lipid-probe interaction and formation of probe-β-CD inclusion complexes leading to the removal of some of the probe (NR) molecules from the lipid environments. The extent of removal of NR is, however, more from DMPG than DMPC lipid. The phenomena are explained from the concept of competitive binding of the probe between the lipids and β-CD. Since lipids are the principal constituents of the cell walls, the work might make a foundation for the possible removal of excess of molecules like nile red adsorbed on the cell walls.
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Affiliation(s)
- Barnali Jana
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
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36
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Hess CM, Riley EA, Palos-Chávez J, Reid PJ. Measuring the spatial distribution of dielectric constants in polymers through quasi-single molecule microscopy. J Phys Chem B 2013; 117:7106-12. [PMID: 23735049 PMCID: PMC4091822 DOI: 10.1021/jp4008398] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The variation in dielectric constant is measured for thin films of poly(methyl methacrylate) (PMMA) and poly(vinylidene fluoride) (PVDF) using confocal fluorescence microscopy. Spatial variation in the local dielectric constant of the polymer films on the ~250 nm length scale is measured using the solvochromatic emission from incorporated nile red (NR) at "quasi-single molecule" (10(-7) M) and true single molecule (SM) concentrations (10(-9) M). Correlation of the NR fluorescence wavelength maximum with dielectric constant is used to transform images of NR's emission maxima to spatial variation in local dielectric constant. We demonstrate that the distributions of dielectric environments measured in the quasi- and true SM approaches are equivalent; however, the enhanced signal rates present in the quasi-SM approach result in this technique being more efficient. In addition, the quasi-SM technique reports directly on the continuous spatial variation in dielectric constant, information that is difficult to obtain in true SM studies. With regards to the polymers of interest, the results presented here demonstrate that a limited distribution of dielectric environments is present in PMMA; however, a broad distribution of environments exists in PVDF consistent with this polymer existing as a distribution of structural phases.
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Affiliation(s)
- Chelsea M. Hess
- Box 351700, Dept. of Chemistry, University of Washington, Seattle, WA 98195
| | - Erin A. Riley
- Box 351700, Dept. of Chemistry, University of Washington, Seattle, WA 98195
| | - Jorge Palos-Chávez
- Box 351700, Dept. of Chemistry, University of Washington, Seattle, WA 98195
| | - Philip J. Reid
- Box 351700, Dept. of Chemistry, University of Washington, Seattle, WA 98195
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37
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Kurniasih IN, Liang H, Kumar S, Mohr A, Sharma SK, Rabe JP, Haag R. A bifunctional nanocarrier based on amphiphilic hyperbranched polyglycerol derivatives. J Mater Chem B 2013; 1:3569-3577. [PMID: 32261172 DOI: 10.1039/c3tb20366b] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We here report on the synthesis of a bifunctional nanocarrier system based on amphiphilic hyperbranched polyglycerol (hPG), which is modified by introducing hydrophobic aromatic groups to the core and retaining hydrophilic groups in the shell. "Selective chemical differentiation" and chemo-enzymatic reaction strategies were used to synthesize this new core-shell type nanocarrier. The system shows an innovative bifunctional carrier capacity with both polymeric and unimolecular micelle-like transport properties. Hydrophobic guest molecules such as pyrene were encapsulated into the hydrophobic core of modified hPG via hydrophobic interactions as well as π-π stacking, analogous to a unimolecular micelle system. A second guest molecule, which has a high affinity to the shell like nile red, was solubilized in the outer shell of the host molecule, thus connecting the nanocarrier molecules to form aggregates. This model is confirmed by UV-Vis, fluorescence, atomic force microscopy, and dynamic light scattering, as well as release studies triggered by pH-changes and enzymes. Encapsulated guest molecules, respectively in the core and in the shell, present different controlled release profiles. The bifunctional nanocarrier system is a promising candidate for simultaneous delivery of different hydrophobic drugs for a combination therapy, e.g., in tumor treatment.
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Affiliation(s)
- Indah N Kurniasih
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany.
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Seliverstova EV, Ibrayev NK, Kudaibergenov SE. Preparation and properties of nanosized fluorescent solid films based on a polyelectrolyte-surfactant complex with organic dyes. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2013. [DOI: 10.1134/s003602441305021x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Seliverstova E, Ibrayev N, Kudaibergenov S. Fluorescencing behavior of thin solid films based on polyelectrolyte-surfactant complex and dye molecules. J Appl Polym Sci 2012. [DOI: 10.1002/app.38723] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Dong J, Zeng Y, Xun Z, Han Y, Chen J, Li YY, Li Y. Stabilized vesicles consisting of small amphiphiles for stepwise photorelease via UV light. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:1733-1737. [PMID: 22172224 DOI: 10.1021/la203829d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A small amphiphile consisting of hydrophilic tetraethylene glycol monoacrylate and hydrophobic alkyl chain which were connected by an o-nitrobenzyl unit, a photolabile group, was designed and synthesized. The critical aggregate concentration of the synthesized amphiphile was determined to be about 3 × 10(-5) M by the fluorescence probe technique. Nanosized vesicles were prepared and stabilized by in-situ radical polymerization without altering the morphology. The polymeric vesicle was highly stable which retained vesicular shape under dilution or UV irradiation. Hydrophobic guests can be encapsulated within the vesicle membrane and released out of the vesicle by UV stimulus through splitting the amphiphilic structure of the amphiphile. Distinguished dose-controlled photorelease of the polymeric vesicle is achieved due to the maintenance of the vesicular shape integrity which makes the guest release depend on the cleavage amount of amphiphilic structure during UV irradiation. This study provides a promising strategy to develop stable drug delivery systems for sustained and phototriggered release.
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Affiliation(s)
- Jianming Dong
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
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Bhatia S, Mohr A, Mathur D, Parmar VS, Haag R, Prasad AK. Biocatalytic route to sugar-PEG-based polymers for drug delivery applications. Biomacromolecules 2011; 12:3487-98. [PMID: 21834595 DOI: 10.1021/bm200647a] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Sugar-PEG-based polymers were synthesized by enzymatic copolymerization of 4-C-hydroxymethyl-1,2-O-isopropylidene-β-L-threo-pentofuranose/4-C-hydroxymethyl-1,2-O-benzylidene-β-L-threo-pentofuranose/4-C-hydroxymethyl-1,2-O-isopropylidene-3-O-pentyl-β-L-threo-pentofuranose with PEG-600 dimethyl ester using Novozyme-435 (Candida antarctica lipase immobilized on polyacrylate). Carbohydrate monomers were obtained by the multistep synthesis starting from diacetone-D-glucose and PEG-600 dimethyl ester, which was in turn obtained by the esterification of the commercially available PEG-600 diacid. Aggregation studies on the copolymers revealed that in aqueous solution those polymers bearing the hydrophobic pentyl/benzylidene moiety spontaneously self-assembled into supramolecular aggregates. The critical aggregation concentration (CAC) of polymers was determined by surface tension measurements, and the precise size of the aggregates was obtained by dynamic light scattering. The polymeric aggregates were further explored for their drug encapsulation properties in buffered aqueous solution of pH 7.4 (37 °C) using nile red as a hydrophobic model compound by means of UV/vis and fluorescence spectroscopy. There was no significant encapsulation in polymer synthesized from 4-C-hydroxymethyl-1,2-O-isopropylidene-β-L-threo-pentofuranose because this sugar monomer does not contain a big hydrophobic moiety as the pentyl or the benzylidene moiety. Nile red release study was performed at pH 5.0 and 7.4 using fluorescence spectroscopy. The release of nile red from the polymer bearing benzylidene moiety and pentyl moiety was observed with a half life of 3.4 and 2.0 h, respectively at pH 5.0, whereas no release was found at pH 7.4.
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Affiliation(s)
- Sumati Bhatia
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi 110 007, India
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Moskalenko YE, Men’shikova AY, Shevchenko NN, Faraonova VV, Gribanov AV. A 1H NMR study of Nile Red solvation. HIGH ENERGY CHEMISTRY 2011. [DOI: 10.1134/s0018143911030118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Tikhomirov VA, Odinokov AV, Bagatur’yants AA, Alfimov MV. Modeling the surface of polystyrene and the adsorption of dye molecules on this surface. THEOR EXP CHEM+ 2011. [DOI: 10.1007/s11237-011-9164-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Jee AY, Bae E, Lee M. Internal motion of an electronically excited molecule in viscoelastic media. J Chem Phys 2010; 133:014507. [PMID: 20614976 DOI: 10.1063/1.3454724] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The twisting motion of trans-4-[4-(dimethylamino)-styryl]-1-methylpyridinium iodide (4-DASPI) in the excited state was investigated in solutions and various polymers in order to understand dependence of molecular rotor dynamics on viscoelasticity. It was observed that the internal motion of electronically excited 4-DASPI correlates strongly with dynamic viscosity and elastic modulus. Our results also showed that condensed phase dynamics of 4-DASPI are governed by the explicit mode coupling between the rotamerizing coordinate and mechanical properties of viscoelastic media.
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Affiliation(s)
- Ah-Young Jee
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 120-750, Republic of Korea
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Pande A, Ghosh KS, Banerjee PR, Pande J. Increase in surface hydrophobicity of the cataract-associated P23T mutant of human gammaD-crystallin is responsible for its dramatically lower, retrograde solubility. Biochemistry 2010; 49:6122-9. [PMID: 20553008 DOI: 10.1021/bi100664s] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The cataract-associated Pro23 to Thr (P23T) mutation in human gammaD-crystallin (HGD) has a variety of phenotypes and is geographically widespread. Therefore, there is considerable interest in understanding the molecular basis of cataract formation due to this mutation. We showed earlier [Pande, A., et al. (2005) Biochemistry 44, 2491-2500] that the probable basis of opacity in this case is the severely compromised, retrograde solubility and aggregation of P23T relative to HGD. The dramatic solubility change occurs even as the structure of the mutant protein remains essentially unchanged in vitro. We proposed that the retrograde solubility and aggregation of P23T were mediated by net hydrophobic, protein-protein interactions. On the basis of these initial findings for P23T and related mutants, and the subsequent finding that they show atypical phase behavior [McManus, J. J., et al. (2007) Proc. Natl. Acad. Sci. U.S.A. 104, 16856-16861], we concluded that the protein clusters formed in solutions of the mutant proteins were held together by net hydrophobic, anisotropic interactions. Here we show, using chemical probes, that the surface hydrophobicities of these mutants are inversely related to their solubility. Furthermore, by probing the isolated N-terminal domains of HGD and P23T directly, we find that the increase in the surface hydrophobicity of P23T is localized in the N-terminal domain. Modeling studies suggest the presence of sticky patches on the surface of the N-terminal domain that could be engaged in the formation of protein clusters via hydrophobic protein-protein interactions. This work thus provides direct evidence of the dominant role played by net hydrophobic and anisotropic protein-protein interactions in the aggregation of P23T.
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Affiliation(s)
- Ajay Pande
- Department of Chemistry, Life Sciences Research Building, University at Albany, State University of New York, Albany, New York 12222, USA
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Encapsulation of Hydrophobic Dyes in Polystyrene Micro- and Nanoparticles via Swelling Procedures. J Fluoresc 2010; 21:937-44. [DOI: 10.1007/s10895-010-0632-2] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2009] [Accepted: 02/10/2010] [Indexed: 10/19/2022]
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Jee AY, Bae E, Lee M. Internal Twisting Dynamics of Dicyanovinyljulolidine in Polymers. J Phys Chem B 2009; 113:16508-12. [DOI: 10.1021/jp908430w] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Ah-Young Jee
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 120-750, Republic of Korea
| | - Eunhye Bae
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 120-750, Republic of Korea
| | - Minyung Lee
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 120-750, Republic of Korea
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