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Carrillo I, Atanes-Sánchez E, Fernández-Martínez F. Structure and morphology of red pigments based on sepiolite. Dalton Trans 2024; 53:6766-6778. [PMID: 38535754 DOI: 10.1039/d3dt03621a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
Sepiolite is an important raw fibrous material. A method to prepare red pigments based on sepiolite through the thermal treatment of sepiolite with sulfur and sodium sulfide hydrate is reported. Sepiolite was heated until 800 °C in order to remove zeolitic water, the first coordinated water, the second coordinated water, and structural hydroxyls. Several [S/Na2S]molar ratios in the range 0.5-7 were employed. The properties of these pigments were studied by different analytical techniques, such as colorimetric analysis, thermal analysis, Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction and scanning electron microscopy. The samples with [S/Na2S] = 0.5 and 1, corresponding to high contents of sodium sulfide in the synthesis procedure, exhibit high values of the colorimetric parameter CIE a* and a maximum reflectance in the visible zone belonging to red, based on the red colour of the samples. Under the reducing conditions of the synthesis, sulfur forms polysulfides of the general formula [Sx]2-. The sodium sulfide reacts with the excess S to form polysulfides as well. From the polysulfides, the radical anions of the general formula [Sx/2]˙- originate and they are identified as the chromophore groups responsible for the color in the sulfur-based pigment analogues of ultramarines. The red colour of the samples could be mainly attributed to the presence of S4 and S4˙- identified by FTIR.
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Affiliation(s)
- I Carrillo
- Departamento de Ingeniería Mecánica, Química y Diseño Industrial, Escuela Técnica Superior de Ingeniería y Diseño Industrial, Universidad Politécnica de Madrid, Ronda de Valencia, 3. 28012 Madrid, Spain.
| | - E Atanes-Sánchez
- Departamento de Ingeniería Mecánica, Química y Diseño Industrial, Escuela Técnica Superior de Ingeniería y Diseño Industrial, Universidad Politécnica de Madrid, Ronda de Valencia, 3. 28012 Madrid, Spain.
| | - F Fernández-Martínez
- Departamento de Ingeniería Mecánica, Química y Diseño Industrial, Escuela Técnica Superior de Ingeniería y Diseño Industrial, Universidad Politécnica de Madrid, Ronda de Valencia, 3. 28012 Madrid, Spain.
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2
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Li S, Yan P, Mu B, Kang Y, Wang A. Preparation of Hybrid Nanopigments with Excellent Environmental Stability, Antibacterial and Antioxidant Properties Based on Monascus Red and Sepiolite by One-Step Grinding Process. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13111792. [PMID: 37299695 DOI: 10.3390/nano13111792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 05/24/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023]
Abstract
This study is focused on the preparation, characterization, and multifunctional properties of intelligent hybrid nanopigments. The hybrid nanopigments with excellent environmental stability and antibacterial and antioxidant properties were fabricated based on natural Monascus red, surfactant, and sepiolite via a facile one-step grinding process. The density functional theory calculations demonstrated that the surfactants loaded on sepiolite were in favor of enhancing the electrostatic, coordination, and hydrogen bonding interactions between Monascus red and sepiolite. Thus, the obtained hybrid nanopigments exhibited excellent antibacterial and antioxidant properties, with an inhibition effect on Gram-positive bacteria that was superior to that of Gram-negative bacteria. In addition, the scavenging activity on DPPH and hydroxyl free radicals as well as the reducing power of hybrid nanopigments were higher than those of hybrid nanopigments prepared without the addition of the surfactant. Inspired by nature, gas-sensitive reversible alochroic superamphiphobic coatings with excellent thermal and chemical stability were successfully designed by combining hybrid nanopigments and fluorinated polysiloxane. Therefore, intelligent multifunctional hybrid nanopigments have great application foreground in related fields.
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Affiliation(s)
- Shue Li
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Penji Yan
- College of Chemistry and Chemical Engineering, Key Laboratory of Hexi Corridor Resources Utilization of Gansu Province, Hexi University, Zhangye 734000, China
| | - Bin Mu
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Yuru Kang
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Aiqin Wang
- Key Laboratory of Clay Mineral Applied Research of Gansu Province, Center of Eco-Material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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3
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Nano clays and its composites for food packaging applications. INTERNATIONAL NANO LETTERS 2022. [DOI: 10.1007/s40089-022-00388-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Dazon C, Fierro V, Celzard A, Witschger O. Identification of nanomaterials by the volume specific surface area (VSSA) criterion: application to powder mixes. NANOSCALE ADVANCES 2020; 2:4908-4917. [PMID: 36132935 PMCID: PMC9418406 DOI: 10.1039/d0na00395f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 09/14/2020] [Indexed: 05/16/2023]
Abstract
We demonstrate the relevance of the Volume Specific Surface Area (VSSA) parameter to identify the nanoparticulate character of powder mixes based on either spherical constituent particles with bimodal size distributions (TiO2), or fiber-like constituent particles with unimodal size distributions (sepiolite and sepiolite-based pigments). These new results indicate that VSSA could reasonably be proposed as an optional criterion in the future for the definition of nanomaterials based on the European Commission recommendation, provided certain requirements are fulfilled.
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Affiliation(s)
- Claire Dazon
- Laboratoire de Physique et de Métrologie des Aérosols, Institut de Radioprotection et de Sûreté Nucléaire F-91192 Gif-sur-Yvette France
| | - Vanessa Fierro
- Institut Jean Lamour, UMR CNRS 7198 F-88051 Epinal France
| | - Alain Celzard
- Institut Jean Lamour, UMR CNRS 7198 F-88051 Epinal France
| | - Olivier Witschger
- Laboratoire de Métrologie des Aérosols, Institut National de Recherche et de Sécurité F-54519 Vandœuvre les Nancy France
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Wang Y, He J, Meng X, Duan Z, Li Y, Zhou F, Zhao L, Zhang P, Su Q, Pang S. A simple construction strategy for fabrication of sulfur-doped silicate materials from attapulgite. NEW J CHEM 2020. [DOI: 10.1039/c9nj04738g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In this work, a simple, economic and effective one step process in which sodium sulfide is used as a modifier and a source of sulfate doping has been proposed to fabricate sulfur-doped silicate materials (SATP).
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Thermal Decomposition of Maya Blue: Extraction of Indigo Thermal Decomposition Steps from a Multistep Heterogeneous Reaction Using a Kinetic Deconvolution Analysis. Molecules 2019; 24:molecules24132515. [PMID: 31324066 PMCID: PMC6651835 DOI: 10.3390/molecules24132515] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 07/05/2019] [Accepted: 07/06/2019] [Indexed: 11/17/2022] Open
Abstract
Examining the kinetics of solids’ thermal decomposition with multiple overlapping steps is of growing interest in many fields, including materials science and engineering. Despite the difficulty of describing the kinetics for complex reaction processes constrained by physico-geometrical features, the kinetic deconvolution analysis (KDA) based on a cumulative kinetic equation is one practical method of obtaining the fundamental information needed to interpret detailed kinetic features. This article reports the application of KDA to thermal decomposition of clay minerals and indigo–clay mineral hybrid compounds, known as Maya blue, from ancient Mayan civilization. Maya blue samples were prepared by heating solid mixtures of indigo and clay minerals (palygorskite and sepiolite), followed by purification. The multistep thermal decomposition processes of the clay minerals and Maya blue samples were analyzed kinetically in a stepwise manner through preliminary kinetic analyses based on a conventional isoconversional method and mathematical peak deconvolution to finally attain the KDA. By comparing the results of KDA for the thermal decomposition processes of the clay minerals and the Maya blue samples, information about the thermal decomposition steps of the indigo incorporated into the Maya blue samples was extracted. The thermal stability of Maya blue samples was interpreted through the kinetic characterization of the extracted indigo decomposition steps.
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Zhuang G, Jaber M, Rodrigues F, Rigaud B, Walter P, Zhang Z. A new durable pigment with hydrophobic surface based on natural nanotubes and indigo: Interactions and stability. J Colloid Interface Sci 2019; 552:204-217. [PMID: 31129294 DOI: 10.1016/j.jcis.2019.04.072] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Revised: 04/17/2019] [Accepted: 04/23/2019] [Indexed: 11/24/2022]
Abstract
Covering with polyorganosilane (POS) was proved as an effective way to enhance the chemical and thermal stability of clay/dye hybrid pigments. But the photostability and interactions with clay minerals, dyes and POS layer has never been reported. In order to investigate above issues, new organic-inorganic hybrid pigments based on halloysite (Hal) and indigo (In) were prepared by grinding method. X-ray diffraction, transmission electron microscopy, thermogravimetry, Fourier transform infrared spectroscopy were applied to characterize the structure of In-Hal (without POS layer) and In-Hal-POS (with POS layer) pigments. Solid state nuclear magnetic resonance (NMR) was employed to reveal the interactions between Hal, In and POS. Reflection spectra and CIE 1976 color space system were used to evaluate the color parameters and color changes of pigments. Thermal stability, chemical resistance to ethanol, 1 mol·L-1 HCl and 1 mol⋅L-1 NaOH, and light fastness to visible light were tested. Indigo molecules dispersed on the surface of Hal nanotubes. POS layer homogeneously covered on the surface of hybrid pigments, without changing the crystal structure and morphology of Hal. Covering with POS layer seldomly affect the color of hybrid pigments. However, In-Hal-POS exhibited better stability than In-Hal, due to hydrophobic surface which can prevent indigo molecules from chemical reactions and degradation. A new route was proposed to prepare organic-inorganic hybrid pigments, ignoring the interaction between dye molecules and substrates.
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Affiliation(s)
- Guanzheng Zhuang
- Sorbonne Université, Laboratoire d'Archéologie Moléculaire et Structurale (LAMS), CNRS UMR 8220, Case Courrier 225, UPMC 4 Pl. Jussieu, 75005 Paris Cedex 05, France; Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Xueyuan Road, Haidian District, Beijing 100083, PR China
| | - Maguy Jaber
- Sorbonne Université, Laboratoire d'Archéologie Moléculaire et Structurale (LAMS), CNRS UMR 8220, Case Courrier 225, UPMC 4 Pl. Jussieu, 75005 Paris Cedex 05, France.
| | - Francisco Rodrigues
- Sorbonne Université, Laboratoire d'Archéologie Moléculaire et Structurale (LAMS), CNRS UMR 8220, Case Courrier 225, UPMC 4 Pl. Jussieu, 75005 Paris Cedex 05, France; Chemistry Department of State University of Paraiba (UEPB), Center of Science and Technology (CCT), Av. Juvêncio Arruda, s/n - Universitário, Campina Grande 58109-790, Paraiba, Brazil
| | - Baptiste Rigaud
- Sorbonne Uniersité, CNRS Institut des Matériaux de Paris Centre (FR2482), 4 Place Jussieu, 75005 Paris, France
| | - Philippe Walter
- Sorbonne Université, Laboratoire d'Archéologie Moléculaire et Structurale (LAMS), CNRS UMR 8220, Case Courrier 225, UPMC 4 Pl. Jussieu, 75005 Paris Cedex 05, France
| | - Zepeng Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Xueyuan Road, Haidian District, Beijing 100083, PR China
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Yu Z, Li X, Peng Y, Min X, Yin D, Shao L. MgAl-Layered-Double-Hydroxide/Sepiolite Composite Membrane for High-Performance Water Treatment Based on Layer-by-Layer Hierarchical Architectures. Polymers (Basel) 2019; 11:polym11030525. [PMID: 30960508 PMCID: PMC6473615 DOI: 10.3390/polym11030525] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 03/12/2019] [Accepted: 03/14/2019] [Indexed: 12/21/2022] Open
Abstract
One of the major challenges in the removal of organic pollutants is to design a material with high efficiency and high flux that can remove both cationic and anionic dyes, oil-in-water (O/W) emulsion and heavy metal ions. Herein, we constructed novel chemically stabilized MgAl-layered-double-hydroxide/sepiolite (MgAl-LDH/Sep) composite membranes via 3D hierarchical architecture construction methods. These membranes were analyzed by scanning electron microscopy (SEM), atomic force microscopy (AFM) and X-ray diffraction (XRD), etc. Benefiting from the presence of hydrophilic functional groups on the surface of the film, the membranes show an enhanced water flux (~1200 L·m−2 h−1), while keeping a high dyes rejection (above 99.8% for anionic and cationic dyes). Moreover, the CA membrane coupled with MgAl-LDH/Sep exhibits a multifunctional characteristic for the efficient removal of mesitylene (99.2%), petroleum ether (99.03%), decane (99.07%), kerosene (99.4%) and heavy metal ion in water due to the layer-by-layer sieving. This hierarchical architecture is proved to have excellent environmental and chemical stability. Therefore, the membrane has potential in the treatment of sewage wastewater.
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Affiliation(s)
- Zongxue Yu
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China.
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu 610500, China.
- State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China.
| | - Xiuhui Li
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China.
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu 610500, China.
| | - Yixin Peng
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China.
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu 610500, China.
| | - Xia Min
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China.
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu 610500, China.
| | - Di Yin
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China.
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu 610500, China.
| | - Liangyan Shao
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China.
- Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, Southwest Petroleum University, Chengdu 610500, China.
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9
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Silva GTM, da Silva KM, Silva CP, Rodrigues ACB, Oake J, Gehlen MH, Bohne C, Quina FH. Highly fluorescent hybrid pigments from anthocyanin- and red wine pyranoanthocyanin-analogs adsorbed on sepiolite clay. Photochem Photobiol Sci 2019; 18:1750-1760. [PMID: 31107486 DOI: 10.1039/c9pp00141g] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Flavylium cations serve as models for the chemical and photochemical reactivity of anthocyanins, the natural plant pigment responsible for many of the red, blue and purple colors of fruits and flowers. Likewise, pyranoflavylium cations serve as models of the fundamental chromophoric moiety of pyranoanthocyanins, molecules that can form from reactions of grape anthocyanins in red wines during their maturation. In the present work, hybrid pigments are prepared by the adsorption of a series of five synthetic flavylium cations (FL) and five synthetic pyranoflavylium cations (PFL) on sepiolite clay (SEP). The FL are smaller in size than the PFL, but both can in principle fit into the tunnels and/or external grooves (with dimensions of 3.7 × 10.6 Å) of SEP. Measurements of the fluorescence quantum yields of the adsorbed dyes indicate that they are at least as fluorescent as in acidic acetonitrile solution, and in a few cases substantially more fluorescent. The observation of biexponential fluorescence decays is consistent with emission from dye molecules adsorbed at two distinct sites, presumably tunnels and grooves. These hybrid materials also have improved properties in terms of stability of the color in contact with pH 10 aqueous solution and resistance to thermal degradation of the dye. SEP thus appears to be a promising substrate for the development of highly fluorescent flavylium or pyranoflavylium cation-derived hybrid pigments with improved color and thermal stability.
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Affiliation(s)
- Gustavo Thalmer M Silva
- Instituto de Química, Universidade de São Paulo, Av. Lineu Prestes 748, Cidade Universitária, São Paulo 05508-000, Brazil.
| | - Karen M da Silva
- Instituto Federal de Educação, Ciência e Tecnologia de São Paulo, Campus São Paulo, 01109-010 São Paulo, Brazil
| | - Cassio P Silva
- Instituto de Química, Universidade de São Paulo, Av. Lineu Prestes 748, Cidade Universitária, São Paulo 05508-000, Brazil.
| | | | - Jessy Oake
- Department of Chemistry and Centre for Advanced Materials and Related Technologies (CAMTEC), University of Victoria, PO Box 1700 STN CSC, Victoria, BC, CanadaV8 W 2Y2
| | - Marcelo H Gehlen
- Instituto de Química de São Carlos, Universidade de São Paulo, 13566-590 São Carlos, SP, Brazil
| | - Cornelia Bohne
- Department of Chemistry and Centre for Advanced Materials and Related Technologies (CAMTEC), University of Victoria, PO Box 1700 STN CSC, Victoria, BC, CanadaV8 W 2Y2
| | - Frank H Quina
- Instituto de Química, Universidade de São Paulo, Av. Lineu Prestes 748, Cidade Universitária, São Paulo 05508-000, Brazil.
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Costa AL, Gomes AC, Pereira RC, Pillinger M, Gonçalves IS, Pineiro M, Seixas de Melo JS. Interactions and Supramolecular Organization of Sulfonated Indigo and Thioindigo Dyes in Layered Hydroxide Hosts. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:453-464. [PMID: 29231742 DOI: 10.1021/acs.langmuir.7b03735] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Supramolecularly organized host-guest systems have been synthesized by intercalating water-soluble forms of indigo (indigo carmine, IC) and thioindigo (thioindigo-5,5'-disulfonate, TIS) in zinc-aluminum-layered double hydroxides (LDHs) and zinc-layered hydroxide salts (LHSs) by coprecipitation routes. The colors of the isolated powders were dark blue for hybrids containing only IC, purplish blue or dark lilac for cointercalated samples containing both dyes, and ruby/wine for hybrids containing only TIS. The as-synthesized and thermally treated materials were characterized by Fourier transform infrared, Fourier transform Raman, and nuclear magnetic resonance spectroscopies, powder X-ray diffraction, scanning electron microscopy, and elemental and thermogravimetric analyses. The basal spacings found for IC-LDH, TIS-LDH, IC-LHS, and TIS-LHS materials were 21.9, 21.05, 18.95, and 21.00 Å, respectively, with intermediate spacings being observed for the cointercalated samples that either decreased (LDHs) or increased (LHSs) with increasing TIS content. UV-visible and fluorescence spectroscopies (steady-state and time-resolved) were used to probe the molecular distribution of the immobilized dyes. The presence of aggregates together with the monomer units is suggested for IC-LDH, whereas for TIS-LDH, IC-LHS, and TIS-LHS, the dyes are closer to the isolated situation. Accordingly, while emission from the powder H2TIS is strongly quenched, an increment in the emission of about 1 order of magnitude was observed for the TIS-LDH/LHS hybrids. Double-exponential fluorescence decays were obtained and associated with two monomer species interacting differently with cointercalated water molecules. The incorporation of both TIS and IC in the LDH and LHS hosts leads to an almost complete quenching of the fluorescence, pointing to a very efficient energy transfer process from (fluorescent) TIS to (nonfluorescent) IC.
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Affiliation(s)
- Ana L Costa
- Coimbra Chemistry Centre, Department of Chemistry, University of Coimbra , Rua Larga, 3004-535 Coimbra, Portugal
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro , Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Ana C Gomes
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro , Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Ricardo C Pereira
- Coimbra Chemistry Centre, Department of Chemistry, University of Coimbra , Rua Larga, 3004-535 Coimbra, Portugal
| | - Martyn Pillinger
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro , Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Isabel S Gonçalves
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro , Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Marta Pineiro
- Coimbra Chemistry Centre, Department of Chemistry, University of Coimbra , Rua Larga, 3004-535 Coimbra, Portugal
| | - J Sérgio Seixas de Melo
- Coimbra Chemistry Centre, Department of Chemistry, University of Coimbra , Rua Larga, 3004-535 Coimbra, Portugal
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11
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Li F, Gao R, Wu T, Li Y. Role of layered materials in emulsified oil/water separation and anti-fouling performance of modified cellulose acetate membranes with hierarchical structure. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2017.08.053] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Giustetto R. Comment to the paper: Effect of grinding time on fabricating a stable methylene blue/palygorskite hybrid nanocomposite, by Yuan Zhang, Wenbo Wang, Bin Mu, Qin Wang, Aiqin Wang, Powder Technology 280 (2015), 173–179. POWDER TECHNOL 2016. [DOI: 10.1016/j.powtec.2016.02.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Moreno LI, McCord BR. The use of direct analysis in real time (DART) to assess the levels of inhibitors co-extracted with DNA and the associated impact in quantification and amplification. Electrophoresis 2016; 37:2807-2816. [PMID: 27027273 DOI: 10.1002/elps.201500480] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 02/17/2016] [Accepted: 02/17/2016] [Indexed: 11/09/2022]
Abstract
The measure of quality in DNA sample processing starts with an effective nucleic acid isolation procedure. Most problems with DNA sample typing can be attributed to low quantity DNA and/or to the presence of inhibitors in the sample. Therefore, establishing which isolation method is best at removing potential inhibitors may help overcome some of the problems analysts encounter by providing useful information in the determination of the optimal approach for any given sample. Direct analysis in real time (DART) mass spectrometry was used in this study to investigate the ability of different extraction methods to remove PCR inhibitors. Methods investigated included both liquid/liquid (phenol-chloroform) and solid phase based robotic procedures, (PrepFiler™ and EZ1 chemistries). Following extraction, samples were analyzed by DART in order to determine the level of remaining inhibitors and then quantified and amplified to determine the effect any remaining inhibitor had on the overall results. The data suggests that organic extraction methods result in detrimental amounts of phenol carryover while automated methods may produce carry-over of bile salts and other chemicals that preferentially bind the solid phase matrix. Both of these effects can have a negative impact in downstream sample processing and genotyping by PCR.
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Affiliation(s)
- Lilliana I Moreno
- Department of Chemistry and Biochemistry, Florida International University, Miami, FL, USA
| | - Bruce R McCord
- Department of Chemistry and Biochemistry, Florida International University, Miami, FL, USA.
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14
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Holmes ST, Dybowski C. Carbon-13 chemical-shift tensors in indigo: A two-dimensional NMR-ROCSA and DFT Study. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2015; 72:90-95. [PMID: 26344134 PMCID: PMC4894646 DOI: 10.1016/j.ssnmr.2015.08.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Revised: 08/25/2015] [Accepted: 08/27/2015] [Indexed: 06/05/2023]
Abstract
The principal components of the (13)C NMR chemical-shift tensors for the eight unique carbon sites of crystalline indigo have been measured using the ROCSA pulse sequence. The chemical shifts have been assigned unambiguously to their respective nuclear sites through comparison of the experimental data to the results of density-functional calculations employing a refined X-ray diffraction structure. These measurements expand the database of measured aromatic (13)C chemical-shift tensors to the indole ring. Magnetic shielding calculations for hypoxanthine and adenosine are also reported. Comparisons of calculations that include the effect of the crystalline lattice with calculations that model indigo as an isolated molecule give an estimate of the intermolecular contribution to the magnetic shielding.
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Affiliation(s)
- Sean T Holmes
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
| | - Cecil Dybowski
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA.
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Zhang Y, Zhang J, Wang A. Facile preparation of stable palygorskite/methyl violet@SiO2 “Maya Violet” pigment. J Colloid Interface Sci 2015. [DOI: 10.1016/j.jcis.2015.07.030] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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16
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Oxidative stress inhibition and oxidant activity by fibrous clays. Colloids Surf B Biointerfaces 2015; 133:32-5. [DOI: 10.1016/j.colsurfb.2015.05.042] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 05/20/2015] [Accepted: 05/22/2015] [Indexed: 11/18/2022]
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17
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Costa AL, Gomes AC, Pillinger M, Gonçalves IS, de Melo JSS. An Indigo Carmine-Based Hybrid Nanocomposite with Supramolecular Control of Dye Aggregation and Photobehavior. Chemistry 2015. [PMID: 26216072 DOI: 10.1002/chem.201501344] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Zn-Al layered double hydroxides (LDHs) containing solely indigo carmine (IC) or 1-hexanesulfonate (HS) anions, or a mixture of the two with different HS/IC molar ratios, were prepared by the direct synthesis method and characterized by various techniques. Hydrotalcite-type phases were obtained with basal spacings of 17.6 Å for the LDH intercalated by IC (IC-LDH) and 18.2-18.3 Å for the other materials containing HS. From the basal spacing for IC-LDH and UV/Vis spectroscopic data, it is proposed that the dye molecules assemble within the interlayer galleries to form a J-type stacking arrangement. A comprehensive electronic spectral and photophysical study was undertaken for IC in solution and all materials, aiming to obtain a detailed characterization of the host-guest and guest-guest interactions. In solution (the solvent surrounded "isolated" molecule), IC presents a fast excited state proton transfer with rate constants of ∼1.2-1.4×10(11) s(-1) , which is linked to the very efficient radiationless deactivation channel. In the solid state it is shown that incorporation of IC within the LDH decreases the level of aggregation, and that further addition of HS induces the appearance of isolated IC units within the LDH galleries. The indigo carmine-based nanocomposites reported constitute a step forward in the design of hybrid materials with tunable properties.
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Affiliation(s)
- Ana L Costa
- Coimbra Chemistry Centre, Department of Chemistry, University of Coimbra, Rua Larga, 3004-535 Coimbra (Portugal).,Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro (Portugal)
| | - Ana C Gomes
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro (Portugal)
| | - Martyn Pillinger
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro (Portugal).
| | - Isabel S Gonçalves
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro (Portugal)
| | - J Sérgio Seixas de Melo
- Coimbra Chemistry Centre, Department of Chemistry, University of Coimbra, Rua Larga, 3004-535 Coimbra (Portugal).
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Cervini-Silva J, Nieto-Camacho A, Ramírez-Apan MT, Gómez-Vidales V, Palacios E, Montoya A, Ronquillo de Jesús E. Anti-inflammatory, anti-bacterial, and cytotoxic activity of fibrous clays. Colloids Surf B Biointerfaces 2015; 129:1-6. [DOI: 10.1016/j.colsurfb.2015.03.019] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Revised: 03/05/2015] [Accepted: 03/06/2015] [Indexed: 10/23/2022]
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Doménech-Carbó A, Valle-Algarra FM, Doménech-Carbó MT, Domine ME, Osete-Cortina L, Gimeno-Adelantado JV. Redox tuning and species distribution in Maya Blue-type materials: a reassessment. ACS APPLIED MATERIALS & INTERFACES 2013; 5:8134-8145. [PMID: 23889292 DOI: 10.1021/am402193u] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Maya Blue-type specimens prepared from indigo (1 wt %) plus kaolinite, montmorillonite, palygorskite, sepiolite, and silicalite are studied. Liquid chromatography with diode array detection, ultra-performance liquid chromatography coupled with mass spectrometry, and pyrolysis-silylation gas chromatography-mass spectrometry analyses of the extracts from these specimens combined with spectral and solid-state voltammetry, electrochemical impedance spectroscopy, and scanning electrochemical microscopy techniques provide evidence for the presence of a significant amount of dehydroindigo and isatin accompanying indigo and other minority organic compounds in all samples. Solid-state electrochemistry data permits the estimatation of indigo loading in archeological Maya Blue, which is in the range of 0.2 to 1.5 wt %. These results support a view of 'genuine' Maya Blue-type materials as complex polyfunctional organic-inorganic hybrids.
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Affiliation(s)
- Antonio Doménech-Carbó
- Departament de Química Analítica, Universitat de València, Dr. Moliner, 50, 46100 Burjassot València, Spain.
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Doménech-Carbó A, Valle-Algarra FM, Doménech-Carbó MT, Osete-Cortina L, Domine ME. ‘Maya chemistry’ of organic–inorganic hybrid materials: isomerization, cyclicization and redox tuning of organic dyes attached to porous silicates. RSC Adv 2013. [DOI: 10.1039/c3ra42890g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Lezhnina MM, Grewe T, Stoehr H, Kynast U. Laponite Blue: Dissolving the Insoluble. Angew Chem Int Ed Engl 2012; 51:10652-5. [DOI: 10.1002/anie.201203236] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Indexed: 11/08/2022]
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Lezhnina MM, Grewe T, Stoehr H, Kynast U. Laponite-Blau: eine Lösung für Unlösliches. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201203236] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Martínez-Martínez V, Corcóstegui C, Bañuelos Prieto J, Gartzia L, Salleres S, López Arbeloa I. Distribution and orientation study of dyes intercalated into single sepiolite fibers. A confocal fluorescence microscopy approach. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm02211j] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Raya J, Hirschinger J, Ovarlez S, Giulieri F, Chaze AM, Delamare F. Insertion of indigo molecules in the sepiolite structure as evidenced by 1H–29Si heteronuclear correlation spectroscopy. Phys Chem Chem Phys 2010; 12:14508-14. [DOI: 10.1039/c0cp00834f] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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