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Yaqoob T, Shaukat S, Alonaizan R, Ullah R, Khan I, Nazar MF, Abd Ur Rahman HM. Solubilization of Reactive Red 2 in the Mixed Micelles of Cetylpyridinium Chloride and TX-114. Molecules 2023; 28:molecules28093952. [PMID: 37175362 PMCID: PMC10180315 DOI: 10.3390/molecules28093952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 05/01/2023] [Accepted: 05/03/2023] [Indexed: 05/15/2023] Open
Abstract
Owing to their surface active properties, surfactants have numerous applications in different fields of life. In the present research work, the solubilization of reactive red 2 (RR2) has been studied in single and mixed micellar systems (MMS) using UV-visible spectroscopy and electrical conductivity measurements. The interaction of RR2 with ionic micelles of cetylpyridinium chloride (CPC) was investigated. In order to probe the interaction of RR2 in MMS, mixtures of CPC and TX-114 (Triton X-114, a nonionic surfactant) were used. UV-visible spectroscopy has been used to obtain the degree of solubilization of RR2 in terms of the partition coefficient (Kc) and Gibbs free energy of partitioning (ΔG°p). Electrical conductivity data have been employed to detect the critical micelle concentration (CMC) of the surfactant systems in the presence of RR2 and, accordingly, to calculate the thermodynamic parameters of the micellization. From the obtained data, it is concluded that the micellization is spontaneous at all studied temperatures. Moreover, the micellization was observed to be driven by both enthalpy and entropy. The results also indicated that MMS have better solubilizing power than single micellar solutions.
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Affiliation(s)
- Tayyba Yaqoob
- Department of Chemistry, Government College Women University Sialkot, Sialkot 51310, Pakistan
| | - Saadia Shaukat
- Department of Chemistry, Government College Women University Sialkot, Sialkot 51310, Pakistan
| | - Rasha Alonaizan
- Zoology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Ramzan Ullah
- Department of Physics, Rawalpindi Women University, Rawalpindi 46300, Pakistan
| | - Imran Khan
- Acoustophoreticn Single Embryo Characterization Laboratory (ASECL), Department of Biomedical Engineering, School of Medicine, Keimyung University, 1095 Dalgubeol-daero, Dalseo-gu, Daegu 42601, Republic of Korea
| | - Muhammad Faizan Nazar
- Department of Chemistry, University of Education Lahore, Multan Campus, Lahore 60700, Pakistan
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2
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Klovak V, Kulichenko S, Lelyushok S. Rhodamine 6G-Anionic Surfactant System Modified by Triton X-100 for Fluorescence Determination of Albumin. APPLIED SPECTROSCOPY 2023; 77:418-425. [PMID: 36537019 DOI: 10.1177/00037028221149494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The influence of sodium hexadecyl sulfate on the nature of the fluorescence spectra of rhodamine 6G in an aqueous solution and a solution of nonionic Triton X-100 was investigated. The change in the nature of the emission spectra is explained by the formation of hydrophobic stoichiometric and sub-stoichiometric reagent-surfactant associates. Stabilization of the colloid-chemical state and reduction of the total turbidity of rhodamine 6G-anionic surfactant associate solutions with the addition of nonionic surfactant as a modifier were registered. The method of modification of the rhodamine 6G-sodium hexadecyl sulfate system with a nonionic surfactant was used in the development of conditions for the fluorescence determination of protein substances in physiological solutions. The concentration conditions for the use of the modified reagent system rhodamine 6G-anionic surfactant-nonionic surfactant for the fluorescence determination of albumin in urine were optimized.
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Affiliation(s)
- Viktoriia Klovak
- Analytical Chemistry Department, Faculty of Chemistry, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
| | - Sergey Kulichenko
- Analytical Chemistry Department, Faculty of Chemistry, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
| | - Serhii Lelyushok
- Analytical Chemistry Department, Faculty of Chemistry, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
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3
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Kurtanidze M, Mzareulishvili N, Rukhadze M, Bezarashvili G, Sidamonidze N. Study of structure of nonaqueous reverse micelles with o-nitroaniline and methyl orange as molecular probes: comparison with an aqueous reverse micelles. Z PHYS CHEM 2022. [DOI: 10.1515/zpch-2022-0011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Abstract
Instead of water reversed micelles can also be formed with polar organic solvents possessed with high dielectric constant and very low solubility in oil phase. Nonaqueous reverse micelles or microemulsions represent an interesting microreactors for various reactions, especially for reactions, where reagents can react with water. Study of localization places of molecular probes in organic polar pockets of reverse micelles is topical. The solvatochromic behavior of optical probes ortho-nitroaniline (o-NA) and methyl orange (MO) was studied in nonaqueous reverse micelles on the basis of surfactants sodium bis (2-ethylhexyl) sulfosuccinate (AOT) and polyoxyethylene (4) lauryl ether (C12E4) and polar organic solvents (acetonitrile, dimethylformamide, glacial acetic acid, etc.) insoluble in oil phase hexane. The strength of binding of o-NA and MO to AOT and C12E4 reversed micelles was assesssed via binding constant (K
b
) and association degree (α) respectively. Donor, acceptor, or dipole-dipole interactions ability of the solvent to the head groups of surfactant was taken into account in order to explain results obtained with UV–visible spectroscopic method. The binding constants of o-NA with reverse AOT micelles in the presence of various solvents in the pockets of reversed micelles increase in the following row water < glacial acetic acid < acetonitrile < dimethylformamide < dimethyl sulfoxide, but this sequence is reversed when o-NA binds to C12E4 reverse micelles. The high value of the proton donor or acidity parameter in the water molecule (x
d
= 0.37) determines the weak binding of o-NA to the head AOT groups (K
b
= 20.8) in case of aqueous reverse micelles. The high value of the dipole parameter in the dimethylformamide molecule (x
n
= 0.40) promotes its strong interaction with nonionic polyoxyethylene groups of C12E4, which results in low value of binding constant (K
b
= 26.5) in case of optical probe o-NA and low value of association degree (α = 0.60) using MO as absorption probe. The results of this article will contribute to the improvement of the concept of interfacial processes, viz.: (i) some issues of supramolecular chemistry, (ii) revealing the contribution of parameters of donor, acceptor or dipole-dipole interaction in a polar organic solvent at the surfactant/nonpolar organic solvent interface, and (iii) features of the dissolution of optical probes in non-aqueous reverse micelles.
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Affiliation(s)
- Manoni Kurtanidze
- Faculty of Exact and Natural Sciences , Ivane Javakhishvili Tbilisi State University , 3 I.Chavchavadze ave , Tbilisi , 0179 , Georgia
| | - Natia Mzareulishvili
- Faculty of Exact and Natural Sciences , Ivane Javakhishvili Tbilisi State University , 3 I.Chavchavadze ave , Tbilisi , 0179 , Georgia
| | - Marina Rukhadze
- Faculty of Exact and Natural Sciences , Ivane Javakhishvili Tbilisi State University , 3 I.Chavchavadze ave , Tbilisi , 0179 , Georgia
| | - George Bezarashvili
- Faculty of Exact and Natural Sciences , Ivane Javakhishvili Tbilisi State University , 3 I.Chavchavadze ave , Tbilisi , 0179 , Georgia
| | - Nelly Sidamonidze
- Faculty of Exact and Natural Sciences , Ivane Javakhishvili Tbilisi State University , 3 I.Chavchavadze ave , Tbilisi , 0179 , Georgia
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4
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Yusaf A, Usman M, Ahmad M, Siddiq M, Mansha A, Al-Hussain SA, Zaki MEA, Rehman HF. Highly Selective Methodology for Entrapment and Subsequent Removal of Cobalt (II) Ions under Optimized Conditions by Micellar-Enhanced Ultrafiltration. Molecules 2022; 27:molecules27238332. [PMID: 36500426 PMCID: PMC9736276 DOI: 10.3390/molecules27238332] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 11/18/2022] [Accepted: 11/24/2022] [Indexed: 12/03/2022] Open
Abstract
Micellar-enhanced ultrafiltration (MEUF), being a separation technique, was used to remove cobalt metal ion (Co2+) from their aqueous solutions in an application to reduce the toxicity level from industrial effluents using a micellar solution of anionic and cationic surfactants. The metal ions were first adsorbed by using anionic surfactants, i.e., sodium dodecyl sulfate (SDS) and sodium oleate (SO). The calculations for partition (Kx) and binding constants (Kb) and their respective free energy of partition and binding (ΔGp and ΔGb kJmol-1) helped significantly to find out the extent of binding or interaction of Co2+ with the surfactant and ΔGp and ΔGb were found to be -29.50 and -19.38 kJmol-1 for SDS and -23.95 and -12.67 kJmol-1 in the case of SO. MEUF work was also performed to find out the optimal conditions to remove metal pollutants from the aqueous system. For the said purpose, various factors and concentrations effect were studied, such as the concentration of the surfactant, concentration of the electrolyte (NaCl), transmembrane pressure, RPM, and pH. The efficiency of this process was checked by calculating various parameters, such as rejection percentage (R%) and permeate flux (J). A maximum rejection of 99.95% with SDS and 99.99% with SO was attained.
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Affiliation(s)
- Amnah Yusaf
- Department of Chemistry, Government College University, Faisalabad 38000, Pakistan
- Department of Chemistry, University College London, London WC1E 6BT, UK
- Department of Chemistry, Government College Women University, Faisalabad 38000, Pakistan
| | - Muhammad Usman
- Department of Chemistry, Government College University, Faisalabad 38000, Pakistan
- Correspondence: (M.U.); (M.S.)
| | - Matloob Ahmad
- Department of Chemistry, Government College University, Faisalabad 38000, Pakistan
| | - Muhammad Siddiq
- Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
- Correspondence: (M.U.); (M.S.)
| | - Asim Mansha
- Department of Chemistry, Government College University, Faisalabad 38000, Pakistan
| | - Sami A. Al-Hussain
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 13623, Saudi Arabia
| | - Magdi E. A. Zaki
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 13623, Saudi Arabia
| | - Hafiza Fatima Rehman
- Department of Zoology, Government College University, Faisalabad 38000, Pakistan
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5
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Gemini surfactant behavior of conventional surfactant dodecyltrimethylammonium bromide with anionic azo dye Sunset Yellow in aqueous solutions. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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6
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Interaction of crystal violet dye with dodecyltrimethylammonium bromide in aqueous and electrolyte medium at different temperatures. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117592] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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7
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Irshad S, Sultana H, Usman M, Akram N, Farooqi ZH, Yusaf A, Nazar MF. Solubilization of direct black 2 in mixed micellar media: insights from spectroscopic and conductometric measurements. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2021.1993890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Saira Irshad
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | - Hamadia Sultana
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | - Muhammad Usman
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | - Nadia Akram
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | - Zahoor H. Farooqi
- School of Chemistry, University of the Punjab, New Campus, Lahore, Pakistan
| | - Amnah Yusaf
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | - Muhammad Faizan Nazar
- Department of Chemistry, University of Education Lahore, Multan Campus, Lahore, Pakistan
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8
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9
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Noor S, Taj MB, M. S, Naz I. Comparative solubilization of reactive dyes in single and mixed surfactants. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2021.1956528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Sadia Noor
- Department of Chemistry, University of Agriculture, Faisalabad, Pakistan
| | | | - Senthilkumar M.
- Department of Chemistry, Annamalai University, Chidambaram, Tamil Nadu, India
| | - Iram Naz
- Department of Chemistry, Govt. College Women University, Faisalabad, Pakistan
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10
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Taj MB, Noor S, Javed T, Ihsan A, Sarwari G, Jabeen S, Sharif T, Naseem Z, Naz I, Iqbal H, Ghani N. Effect of nonionic surfactant on micellization thermodynamics and spectroscopic profile of dye-surfactant aggregation. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2021.1960169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Muhammad Babar Taj
- Institute of Chemistry, Islamia University Bahawalpur, Bahawalpur, Pakistan
| | - Sadia Noor
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Tariq Javed
- Department of Chemistry, University of Sahiwal, Sahiwal, Pakistan
| | - Anaum Ihsan
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Ghulam Sarwari
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Sobia Jabeen
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Tehmina Sharif
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Zubera Naseem
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Iram Naz
- Department of Chemistry, Govt. College Women University Faisalabad, Faisalabad, Pakistan
| | - Humaira Iqbal
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Naila Ghani
- Department of Chemistry, University of Agriculture Faisalabad, Faisalabad, Pakistan
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11
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Sachin K, Karpe SA, Kumar D, Singh M, Dominguez H, Ríos-López M, Bhattarai A. A simulation study of self-assembly behaviors and micellization properties of mixed ionic surfactants. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116003] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Mechanism of interactions in C.I. Acid Red 18 – Floating plants and polymeric resins systems: Kinetic, equilibrium, auxiliaries impact and column studies. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115903] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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13
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Bhat R, Foster LL, Rani G, Vemparala S, Kuroda K. The function of peptide-mimetic anionic groups and salt bridges in the antimicrobial activity and conformation of cationic amphiphilic copolymers. RSC Adv 2021; 11:22044-22056. [PMID: 35480841 PMCID: PMC9034112 DOI: 10.1039/d1ra02730a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 06/15/2021] [Indexed: 12/19/2022] Open
Abstract
Herein we report the synthesis of ternary statistical methacrylate copolymers comprising cationic ammonium (amino-ethyl methacrylate: AEMA), carboxylic acid (propanoic acid methacrylate: PAMA) and hydrophobic (ethyl methacrylate: EMA) side chain monomers, to study the functional role of anionic groups on their antimicrobial and hemolytic activities as well as the conformation of polymer chains. The hydrophobic monomer EMA was maintained at 40 mol% in all the polymers, with different percentages of cationic ammonium (AEMA) and anionic carboxylate (PAMA) side chains, resulting in different total net charge for the polymers. The antimicrobial and hemolytic activities of the copolymer were determined by the net charge of +3 or larger, suggesting that there was no distinct effect of the anionic carboxylate groups on the antimicrobial and hemolytic activities of the copolymers. However, the pH titration and atomic molecular dynamics simulations suggest that anionic groups may play a strong role in controlling the polymer conformation. This was achieved via formation of salt bridges between cationic and anionic groups, transiently crosslinking the polymer chain allowing dynamic switching between compact and extended conformations. These results suggest that inclusion of functional groups in general, other than the canonical hydrophobic and cationic groups in antimicrobial agents, may have broader implications in acquiring functional structures required for adequate antimicrobial activity. In order to explain the implications, we propose a molecular model in which formation of intra-chain, transient salt bridges, due to the presence of both anionic and cationic groups along the polymer, may function as "adhesives" which facilitate compact packing of the polymer chain to enable functional group interaction but without rigidly locking down the overall polymer structure, which may adversely affect their functional roles.
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Affiliation(s)
- Rajani Bhat
- Department of Biologic and Materials Sciences & Prosthodontics, School of Dentistry, University of Michigan Ann Arbor Michigan 48109 USA
| | - Leanna L Foster
- Macromolecular Science and Engineering Center, University of Michigan Ann Arbor Michigan 48109 USA
| | - Garima Rani
- TIFR Centre for Interdisciplinary Sciences, Tata Institute of Fundamental Research Hyderabad 500046 India
| | - Satyavani Vemparala
- The Institute of Mathematical Sciences, C. I. T. Campus Taramani Chennai 600113 India
- Homi Bhabha National Institute, Training School Complex Anushakti Nagar Mumbai 400094 India
| | - Kenichi Kuroda
- Department of Biologic and Materials Sciences & Prosthodontics, School of Dentistry, University of Michigan Ann Arbor Michigan 48109 USA
- Macromolecular Science and Engineering Center, University of Michigan Ann Arbor Michigan 48109 USA
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14
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Wrzesińska K, Wawrzkiewicz M, Szymczyk K. Physicochemical interactions in C.I. Acid Green 16 – Lewatit S 6368 A systems – kinetic, equilibrium, auxiliaries addition and thermodynamic aspects. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115748] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Wang J, Waltmann C, Umana-Kossio H, Olvera de la Cruz M, Torkelson JM. Heterogeneous Charged Complexes of Random Copolymers for the Segregation of Organic Molecules. ACS CENTRAL SCIENCE 2021; 7:882-891. [PMID: 34079903 PMCID: PMC8161480 DOI: 10.1021/acscentsci.1c00119] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Indexed: 05/29/2023]
Abstract
Nature harnesses the disorder of intrinsically disordered proteins to organize enzymes and biopolymers into membraneless organelles. The heterogeneous nature of synthetic random copolymers with charged, polar, and hydrophobic groups has been exploited to mimic intrinsically disordered proteins, forming complexes with enzymatically active proteins and delivering them into nonbiological environments. Here, the properties of polyelectrolyte complexes composed of two random copolymer polyelectrolytes are studied experimentally and via simulation with the aim of exploiting such complexes for segregating organic molecules from water. The anionic polyelectrolyte contains hydrophilic and hydrophobic side chains and forms self-assembled hydrophobic domains. The cationic polymer is a high-molecular-weight copolymer of hydrophilic and charged side groups and acts as a flocculant. We find that the polyelectrolyte complexes obtained with this anionic and cationic random copolymer system are capable of absorbing small cationic, anionic, and hydrophobic organic molecules, including perfluorooctanoic acid, a compound of great environmental and toxicologic concern. Importantly, these macroscopic complexes can be easily removed from water, thereby providing a simple approach for organic contaminant removal in aqueous media. MARTINI and coarse-grained molecular dynamics simulations explore how the microscale heterogeneity of these random copolymer complexes relates to their segregation functionality.
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Affiliation(s)
- Jeremy Wang
- Dept.
of Materials Science and Engineering, Dept. of Chemical and Biological
Engineering, Dept. of Chemistry, and Dept. of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, United States
| | - Curt Waltmann
- Dept.
of Materials Science and Engineering, Dept. of Chemical and Biological
Engineering, Dept. of Chemistry, and Dept. of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, United States
| | - Han Umana-Kossio
- Dept.
of Materials Science and Engineering, Dept. of Chemical and Biological
Engineering, Dept. of Chemistry, and Dept. of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, United States
| | - Monica Olvera de la Cruz
- Dept.
of Materials Science and Engineering, Dept. of Chemical and Biological
Engineering, Dept. of Chemistry, and Dept. of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, United States
| | - John M. Torkelson
- Dept.
of Materials Science and Engineering, Dept. of Chemical and Biological
Engineering, Dept. of Chemistry, and Dept. of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, United States
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16
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Islam M, Hossain M, Mahbub S, Hoque MA, Kumar D, Wabaidur SM, Habila MA, AL-Anazy MM, Kabir M. Influences of alcohol and diol on the aggregation behaviour, modes of interaction and the thermodynamic properties of the mixture of bromocresol green dye and sodium dodecyl sulphate at numerous temperatures. Mol Phys 2021. [DOI: 10.1080/00268976.2021.1925364] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Mohaiminul Islam
- Department of Chemistry, Jahangirnagar University, Dhaka, Bangladesh
| | - Mezbah Hossain
- Department of Chemistry, Hajee Mohammad Danesh Science & Technology University, Dinajpur, Bangladesh
| | - Shamim Mahbub
- Department of Chemistry & Physics, Gono Bishwabidyalay, Dhaka, Bangladesh
| | - Md. Anamul Hoque
- Department of Chemistry, Jahangirnagar University, Dhaka, Bangladesh
| | - Dileep Kumar
- Division of Computational Physics, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam
- Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Saikh M. Wabaidur
- Advanced Materials Research Chair, Chemistry Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Mohamed A. Habila
- Advanced Materials Research Chair, Chemistry Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Murefah Mana AL-Anazy
- Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Mahbub Kabir
- Department of Chemistry, Jahangirnagar University, Dhaka, Bangladesh
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17
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18
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Yusaf A, Usman M, Mansha A, Saeed M, Ahmad M, Siddiq M. Micellar-enhanced ultrafiltration (MEUF) for removal of rhodamine B (RhB) from aqueous system. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2020.1841002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Amnah Yusaf
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | - Muhammad Usman
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | - Asim Mansha
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | - Muhammad Saeed
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | - Matloob Ahmad
- Department of Chemistry, Government College University, Faisalabad, Pakistan
| | - Muhammad Siddiq
- Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan
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19
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Application of Functionalized DVB- co-GMA Polymeric Microspheres in the Enhanced Sorption Process of Hazardous Dyes from Dyeing Baths. Molecules 2020; 25:molecules25225247. [PMID: 33187111 PMCID: PMC7696988 DOI: 10.3390/molecules25225247] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 11/03/2020] [Accepted: 11/04/2020] [Indexed: 12/21/2022] Open
Abstract
Intensive development of many industries, including textile, paper, plastic or food, generate huge amounts of wastewaters containing not only toxic dyes but also harmful auxiliaries such as salts, acid, bases, surfactants, oxidants, heavy metal ions. The search for effective pollutant adsorbents is a huge challenge for scientists. Synthesis of divinylbenzene copolymer with glycidyl methacrylate functionalized with triethylenetetramine (DVB-co-GMA-TETA) resin was performed and the obtained microspheres were evaluated as a potential adsorbent for acid dye removal from dyeing effluents. The sorption capacities were equal to 142.4 mg/g for C.I. Acid Green 16 (AG16), 172 mg/g for C.I. Acid Violet 1 (AV1) and 216.3 mg/g for C.I. Acid Red 18 (AR18). Non-linear fitting of the Freundlich isotherm to experimental data was confirmed rather than the Langmuir, Temkin and Dubinin-Radushkevich. The kinetic studies revealed that intraparticle diffusion is the rate-limiting step during dye adsorption. Auxiliaries such as Na2SO4 (5–25 g/L), CH3COOH (0.25–1.5 g/L) and anionic surfactant (0.1–0.5 g/L) present in the dyeing baths enhance the dye adsorption by the resin in most cases. Regeneration of DVB-co-GMA-TETA is possible using 1 M NaCl-50% v/v CH3OH.
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20
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Aryanti N, Nafiunisa A, Kusworo TD, Wardhani DH. Micellar-Enhanced Ultrafiltration Using a Plant-Derived Surfactant for Dye Separation in Wastewater Treatment. MEMBRANES 2020; 10:membranes10090220. [PMID: 32887244 PMCID: PMC7557959 DOI: 10.3390/membranes10090220] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/20/2020] [Accepted: 08/25/2020] [Indexed: 11/16/2022]
Abstract
Micellar-enhanced ultrafiltration (MEUF) is one of several membrane methods used for the removal of trace organic pollutants from aqueous streams. In this process, a surfactant is added to a polluted aqueous solution at a concentration higher than its critical micelle concentration (CMC). Unlike synthetic surfactants, natural surfactants, from plants such as the saponin, while ecologically adaptable as surfactants in MEUF systems, are also biodegradable, renewable, and environmentally safe. This study applied Sapindus rarak extract as the natural surfactant in MEUF for Remazol dye separation. It was found that the presence of Sapindus rarak extract increased separation of Remazol red and blue dyes by up to 97.02% and 99.42%, respectively. However, the addition of surfactant decreased permeate fluxes due to membrane fouling and concentration polarization. In addition, loading micelle (Lm), representing the performance of the surfactant micelle for dye separation, as well as the blocking mechanism, was investigated. Lm was found to be in the range of 0.002-0.068 mM dyes/mM saponin. Ultrafiltration blocking mechanisms, as confirmed by the Hermia model, were: standard blocking, for cases without the addition of surfactant; cake formation, for cases with surfactant below the CMC; and complete blocking, for cases with surfactant above the CMC.
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Affiliation(s)
- Nita Aryanti
- Department of Chemical Engineering, Diponegoro University, Semarang 50275, Indonesia; (A.N.); (T.D.K.); (D.H.W.)
- Membrane Research Centre (MeR-C), Diponegoro University, Semarang 50275, Indonesia
- Correspondence:
| | - Aininu Nafiunisa
- Department of Chemical Engineering, Diponegoro University, Semarang 50275, Indonesia; (A.N.); (T.D.K.); (D.H.W.)
| | - Tutuk Djoko Kusworo
- Department of Chemical Engineering, Diponegoro University, Semarang 50275, Indonesia; (A.N.); (T.D.K.); (D.H.W.)
- Membrane Research Centre (MeR-C), Diponegoro University, Semarang 50275, Indonesia
| | - Dyah Hesti Wardhani
- Department of Chemical Engineering, Diponegoro University, Semarang 50275, Indonesia; (A.N.); (T.D.K.); (D.H.W.)
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21
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Povedailo VA, Lysenko IL, Tikhomirov SA, Yakovlev DL, Tsybulsky DA, Kruhlik AS, Fan F, Martynenko-Makaev YV, Sharko OL, Duong PV, Minh PH, Shmanai VV. Fluorescent Properties of Carboxyfluorescein Bifluorophores. J Fluoresc 2020; 30:629-635. [PMID: 32300977 DOI: 10.1007/s10895-020-02535-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 04/02/2020] [Indexed: 11/24/2022]
Abstract
Bright fluorescent probes with enhanced intensities in the fluorescein channel are of great value for plenty of biological applications. To design effective probes one should introduce as many as possible fluorophores to the biomolecule while leaving its native structure as intact as possible. To reach this compromise, we designed and synthesized fluorescein bifluorophores on the 3,5-diaminobenzoic acid scaffold, which allows for insertion of two fluorophores at one modification site of a biomolecule. Rigid structure of the branching linker group allows to minimize self-quenching the fluorophores. However, despite the structure similarities of fluorescein isomers (5-FAM and 6-FAM), different photophysical behavior was observed for the corresponding bifluorophores. Here we made efforts to get insight into these effects with the focus on the media viscosity impact.
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Affiliation(s)
- Vladimir A Povedailo
- B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimost' Ave, Minsk, 220072, Belarus
| | - Ivan L Lysenko
- Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, 13 Surganova str, 220072, Minsk, Belarus
| | - Sergei A Tikhomirov
- B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimost' Ave, Minsk, 220072, Belarus
| | - Dmitrii L Yakovlev
- B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimost' Ave, Minsk, 220072, Belarus
| | - Dmitry A Tsybulsky
- Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, 13 Surganova str, 220072, Minsk, Belarus
| | - Aliaksandr S Kruhlik
- Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, 13 Surganova str, 220072, Minsk, Belarus
| | - Fan Fan
- Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, 13 Surganova str, 220072, Minsk, Belarus
| | - Yury V Martynenko-Makaev
- Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, 13 Surganova str, 220072, Minsk, Belarus
| | - Olga L Sharko
- Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, 13 Surganova str, 220072, Minsk, Belarus
| | - Pham V Duong
- Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam
| | - Pham H Minh
- Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam
| | - Vadim V Shmanai
- Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, 13 Surganova str, 220072, Minsk, Belarus.
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22
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Rehman A, Usman M, Bokhari TH, Haq AU, Saeed M, Rahman HMAU, Siddiq M, Rasheed A, Nisa MU. The application of cationic-nonionic mixed micellar media for enhanced solubilization of Direct Brown 2 dye. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112408] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Chemometrics-spectroscopic study of the effect of temperature and pre-micellar to post-micellar forms of various surfactants on the dimerization of nickel and copper phthalocyanines. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112350] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Rehman A, Usman M, Bokhari TH, Rahman HMAU, Mansha A, Siddiq M, Rasheed A, Nisa MU. Effects of nonionic surfactant (TX-100) on solubilizing power of cationic surfactants (CTAB and CPC) for Direct Red 13. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124241] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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25
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Younis S, Usman M, Atta ul Haq, Akram N, Saeed M, Raza S, Siddiq M, Bukhtawar F. Solubilization of reactive dyes by mixed micellar system: Synergistic effect of nonionic surfactant on solubilizing power of cationic surfactant. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2019.136890] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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26
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Study on surface properties of sodiumdodecyl sulfate and dodecyltrimethylammonium bromide mixed surfactants and their interaction with dyes. Heliyon 2019; 5:e01510. [PMID: 31194183 PMCID: PMC6554738 DOI: 10.1016/j.heliyon.2019.e01510] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 02/28/2019] [Accepted: 04/09/2019] [Indexed: 11/27/2022] Open
Abstract
The antagonistic as well as synergetic interaction for dodecyltrimethylammonium bromide (DTAB) and sodiumdodecyl sulfate (SDS) mixed surfactants by using surface tension are investigated on the basis of the results obtained earlier, the efficiency of adsorption (pC20), aggregation number (N), ΓΓmax, effective Gibbs free energy (ΔGeffo) and CMCC20 are calculated additionally with three different temperatures at T = 293.15, 298.15 and 303.15 K as the detailed surface properties. The binding constants and standard free energy change of SDS and DTAB mixture with the interaction of (2.5× 10−5 mol L–1 of methyl orange, MO and methylene blue, MB) are carried out by using UV-Vis spectroscopy at room temperature by using different models. The closer values of the binding constants and standard free energy change for SDS and DTAB mixture with the interaction of MO and MB are included in our investigations.
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27
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Lombardo D, Munaò G, Calandra P, Pasqua L, Caccamo MT. Evidence of pre-micellar aggregates in aqueous solution of amphiphilic PDMS-PEO block copolymer. Phys Chem Chem Phys 2019; 21:11983-11991. [PMID: 31134980 DOI: 10.1039/c9cp02195g] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The self-assembly process in a water solution of an amphiphilic polydimethylsiloxane-b-polyethyleneoxide (PDMS-PEO) diblock copolymer was investigated by means of small-angle X-ray scattering (SAXS) experiments in the concentration region below (and near) the critical micellar concentration (c.m.c. = 0.007 g cm-3). In the highly diluted region, at the copolymer concentration of c = 0.002 g cm-3, the early stage of the self-assembly process was characterized by the formation of small (primary) micellar units (with a radius of R = 2.7 nm) with core-shell morphology, which coexisted with larger supramolecular aggregates of entangled micelles (with an average radius of R = 9.5 nm). The increase in the copolymer concentration (to c = 0.005 and c = 0.01 g cm-3) caused increase in the sizes of both the small micelles and supra-micellar aggregates. Interestingly, at the concentration of c = 0.005 g cm-3, both the size and micelle aggregation number (Nagg) were found to increase on increasing the temperature in the range of 10 ≤ T ≤ 55 °C. This phenomenon was characterised by the dehydration process of the ethylene oxide (EO) segments, as evidenced by the calculation of excess water in the hydrophilic shell of the micelles. The more compact (less hydrated) structure of the hydrophilic PEO chains, which strongly influenced the spontaneous curvature of the amphiphile hydrophilic region, turned out to be the driving factor that favoured the increase in the micelle aggregation number with the increase in temperature. The obtained results evidence that the self-assembly process of PDMS-PEO copolymer amphiphiles is a gradual process that is already present at the very low concentration region (far below the macroscopically determined c.m.c.); moreover, it is characterised by a multi-stage organization process, where the primary building blocks self-assemble into more complex secondary structures that encompass multiple length scales.
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Affiliation(s)
- Domenico Lombardo
- CNR-IPCF, Istituto per i Processi Chimico Fisici - (Sez. Messina) Viale, F. Stagno D'Alcontres, 37, I-98158, Messina, Italy.
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28
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Shapovalov S, Ponomariov V, Mosharenkova O, Butenko S. Studies of the Association of Dyes with Surfactants in Aqueous Solutions: Spectrophotometry and Computer Simulation. FRENCH-UKRAINIAN JOURNAL OF CHEMISTRY 2019. [DOI: 10.17721/fujcv7i2p9-19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The association of cationic dye (pinacyanol, PC) with anionic dyes (ethyleosin, EE, or rhodamine 200 C, R200C), and also the interaction “dye+surfactant” has been investigated in aqueous solutions by visible spectroscopy and computer simulation. Cetylpyridinium bromide (CPB), sodium dodecylsulfate (SDS) and triton X-100 (TX) were used as cationic, anionic and non-ionic surfactants respectively. The formation of “dye+surfactant” associates takes place at low dye concentrations (≥10‑6 M) and concentrations of surfactant, which are much smaller than the critical micelle concentrations (CMC). In contrast, similar concentrations (10‑6 – 10‑4 M) of small cations of tetramethylammonium or tetraethylammonium have no noticeable effect on the absorption spectra of the dye in the “dye+tetraalkylammonium salt” systems; it indicates the absence of formation of new compound between the dye and salt. The standard enthalpy of formation of “dye+dye” or “dye+surfactant” associates has been determined by AM1 and PM3 semiempirical methods. The computer simulation confirms that the formation of these associates is energetically beneficial.
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29
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Chunhachaichana C, Srichana T. Efficiency of sildenafil encapsulation in poloxamer micelles. J DISPER SCI TECHNOL 2018. [DOI: 10.1080/01932691.2018.1518142] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Charisopon Chunhachaichana
- Department of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat Yai, Songkhla, Thailand
| | - Teerapol Srichana
- Department of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat Yai, Songkhla, Thailand
- Drug Delivery System Excellence Center, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat Yai, Songkhla, Thailand
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30
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Gujar V, Sangale V, Ottoor D. A Selective Turn off Fluorescence Sensor Based on Propranolol-SDS Assemblies for Fe 3+ Detection. J Fluoresc 2018; 29:91-100. [PMID: 30361859 DOI: 10.1007/s10895-018-2313-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Accepted: 10/15/2018] [Indexed: 11/24/2022]
Abstract
A fluorophore modulation with sodium dodecyl sulphate (SDS) assemblies for the selective and sensitive sensing of Fe3+ ions in aqueous solution is illustrated in this work. Emission spectral characteristics of fluorescent molecule, propranolol (PPH) was intact in presence of metal ions. While on modulation with SDS assemblies, PPH was transformed into a tuneable sensor for Fe3+ ions. This sensor ensemble was not only highly sensitive towards Fe3+ ions in aqueous solution with detection limits lower than 3 μM but also possess high discriminating efficiency in presence of other metal ions like Cu2+, Pb2+, Zn2+, Ni2+, Fe2+, Cd2+, Co2+, Al3+, Mg2+, Hg2+ and Mn2+. The electrostatic interaction of the anionic group of surfactants with the metal cations significantly increases the communication between metal ions and PPH moiety which results in the quenching of PPH fluorescence. We have employed fluorescence steady state and lifetime studies to understand the metal sensing behaviour of the PPH-SDS sensor system. Principal component analysis (PCA) was used to evaluate the discriminative ability of the developed sensor system towards Fe3+ ions.
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Affiliation(s)
- Varsha Gujar
- Department of Chemistry, Savitribai Phule Pune University, Ganeshkhind Road, Pune, 411007, India
| | - Vijay Sangale
- Department of Chemistry, Savitribai Phule Pune University, Ganeshkhind Road, Pune, 411007, India
| | - Divya Ottoor
- Department of Chemistry, Savitribai Phule Pune University, Ganeshkhind Road, Pune, 411007, India.
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31
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Wang J, Zhang Y, Dou H, Pei L. Influence of Ethylene Oxide Content in Nonionic Surfactant to the Hydrolysis of Reactive Dye in Silicone Non-Aqueous Dyeing System. Polymers (Basel) 2018; 10:E1158. [PMID: 30961083 PMCID: PMC6403939 DOI: 10.3390/polym10101158] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 10/08/2018] [Accepted: 10/14/2018] [Indexed: 11/17/2022] Open
Abstract
Silicone reverse dyeing technology provides an important means of saving water and salts-free in the textile dyeing industry. The interactions between dyes and surfactants may influence the hydrolysis of dye during dyeing. In this investigation, the effect of ethylene oxide content in nonionic surfactant on the hydrolytic reaction of reactive dye was firstly investigated in a siloxane reverse emulsion dyeing system. Compared with no surfactants, the hydrolytic reaction of vinyl sulfone reactive dye was a slowdown when some nonionic surfactants were used during dyeing. Usually, the hydrophobic groups in nonionic surfactants were dodecyl chains but their polar head groups were different. The hydrolytic reaction of vinyl sulfone dye showed that the longer of EO (ethylene oxide) chains, the faster the hydrolytic reaction of vinyl sulfone dye. From the absorption spectrum of dye, it could be concluded that more of dyes would be solubilized into the formed micelles, and dye-surfactant complexes were adhered to the surface of micelles if the molecular structure of surfactant had a shorter EO chains. Furthermore, the intramolecular or intermolecular hydrogen bond could be formed between dye and surfactant, which would further influence the hydrolytic reaction of vinyl sulfone dye. However, the solubility of surfactant in siloxane non-aqueous media would decrease with the increase of EO chains. Meanwhile, the dispersion of dye was enhanced as well as the hydrolytic reaction of dye. From this investigation, some surfactant can be used to improve the fixation of reactive dye during dyeing. Furthermore, washing times after dyeing and the ecological problems can be decreased.
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Affiliation(s)
- Jiping Wang
- Engineering Research Center for Eco-Dyeing and Finishing of Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China.
- National Base for International Science & Technology Cooperation in Textiles and Consumer-Goods Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China.
| | - Yongbo Zhang
- Engineering Research Center for Eco-Dyeing and Finishing of Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China.
- National Base for International Science & Technology Cooperation in Textiles and Consumer-Goods Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China.
| | - Huashu Dou
- Key Laboratory of Fluid Transmission Technology of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China.
| | - Liujun Pei
- Engineering Research Center for Eco-Dyeing and Finishing of Textiles, Zhejiang Sci-Tech University, Hangzhou 310018, China.
- National Base for International Science & Technology Cooperation in Textiles and Consumer-Goods Chemistry, Zhejiang Sci-Tech University, Hangzhou 310018, China.
- Key Laboratory of Fluid Transmission Technology of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China.
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32
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Muhammad MT, Nasiruddin Khan M. Oppositely charged dye surfactant interactions: Extent and selectivity of ion pair formation. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.06.108] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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33
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Mishra K, Kumar Singh S, Singh B. A Liquid-Crystal-Based System for Differentiating Structurally Related Analytes. ChemistrySelect 2018. [DOI: 10.1002/slct.201800492] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kirtika Mishra
- Department of Chemistry; Institute of Science; Banaras Hindu University; Varanasi-221005 India
| | - Sachin Kumar Singh
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati-781039 India
| | - Bachcha Singh
- Department of Chemistry; Institute of Science; Banaras Hindu University; Varanasi-221005 India
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34
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Nuclear Magnetic Resonance Spectroscopy Investigations of Naphthalene-Based 1,2,3-Triazole Systems for Anion Sensing. MAGNETOCHEMISTRY 2018. [DOI: 10.3390/magnetochemistry4010015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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