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Ipte PR, Kumar S, Satpati AK. Electrochemical synthesis of carbon nano spheres and its application for detection of ciprofloxacin. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2019; 55:142-150. [PMID: 31594467 DOI: 10.1080/10934529.2019.1674591] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 09/26/2019] [Accepted: 09/26/2019] [Indexed: 06/10/2023]
Abstract
Carbon nano spheres (CNSs) were synthesized by single step electrochemical synthesis route in ultra-pure water as a medium of synthesis. Characterization of synthesized CNSs was carried out using atomic force microscope (AFM), particle size analyzer, zeta potential analyzer and Fourier Transform Infrared (FTIR) measurements, from which the information about the morphology and functional groups present on the surface of the particles are obtained. The particle size of the CNSs was found to be 6 nm. FTIR spectrum shows the presence of functional groups such as -OH, C≡C, C = C and on the CNSs. Electrochemical and spectroscopic experiments were conducted to determine the interaction of the drug molecule ciprofloxacin (Cf) with CNSs, strong interaction between Cf and CNSs leads to the development of analytical method of detection of Cf using CNSs as the pre-concentrating agent. The detection of limit of the present method is obtained as 0.15 μM at (S/N) ratio of 3. CNSs can be considered as a potential candidate for the fabrication of sensor for high sensitive determination of Cf.
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Affiliation(s)
- Priyanka R Ipte
- Analytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
| | - Sriram Kumar
- Analytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
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3
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Xie S, Manuguri S, Ramström O, Yan M. Impact of Hydrogen Bonding on the Fluorescence of N-Amidinated Fluoroquinolones. Chem Asian J 2019; 14:910-916. [PMID: 30762939 DOI: 10.1002/asia.201801916] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 02/13/2019] [Indexed: 12/27/2022]
Abstract
The fluorescence properties of AIE-active N-amidinated fluoroquinolones, efficiently obtained by a perfluoroaryl azide-aldehyde-amine reaction, have been studied. The fluorophores were discovered to elicit a highly sensitive fluorescence quenching response towards guest molecules with hydrogen-bond-donating ability. This effect was evaluated in a range of protic/aprotic solvents with different H-bonding capabilities, and also in aqueous media. The influence of acid/base was furthermore addressed. The hydrogen-bonding interactions were studied by IR, NMR, UV/Vis and time-resolved fluorescence decay, revealing their roles in quenching of the fluorescence emission. Due to the pronounced quenching property of water, the N-amidinated fluoroquinolones could be utilized as fluorescent probes for quantifying trace amount of water in organic solvents.
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Affiliation(s)
- Sheng Xie
- Department of Chemistry, KTH-Royal Institute of Technology, Teknikringen 30, 10044, Stockholm, Sweden.,College of Chemistry and Chemical Engineering, Hunan University, 410082, Changsha, China
| | - Sesha Manuguri
- Department of Chemistry, KTH-Royal Institute of Technology, Teknikringen 30, 10044, Stockholm, Sweden
| | - Olof Ramström
- Department of Chemistry, KTH-Royal Institute of Technology, Teknikringen 30, 10044, Stockholm, Sweden.,Department of Chemistry, University of Massachusetts Lowell, 1 University Ave., Lowell, MA, 01854, USA.,Department of Chemistry and Biomedical Sciences, Linnaeus University, 39182, Kalmar, Sweden
| | - Mingdi Yan
- Department of Chemistry, KTH-Royal Institute of Technology, Teknikringen 30, 10044, Stockholm, Sweden.,Department of Chemistry, University of Massachusetts Lowell, 1 University Ave., Lowell, MA, 01854, USA
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4
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Lotfy HM, Saleh SS, Hassan NY, Salem H. Computation of geometric representation of novel spectrophotometric methods used for the analysis of minor components in pharmaceutical preparations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 151:628-643. [PMID: 26163786 DOI: 10.1016/j.saa.2015.06.103] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 06/09/2015] [Accepted: 06/25/2015] [Indexed: 06/04/2023]
Abstract
Novel spectrophotometric methods were applied for the determination of the minor component tetryzoline HCl (TZH) in its ternary mixture with ofloxacin (OFX) and prednisolone acetate (PA) in the ratio of (1:5:7.5), and in its binary mixture with sodium cromoglicate (SCG) in the ratio of (1:80). The novel spectrophotometric methods determined the minor component (TZH) successfully in the two selected mixtures by computing the geometrical relationship of either standard addition or subtraction. The novel spectrophotometric methods are: geometrical amplitude modulation (GAM), geometrical induced amplitude modulation (GIAM), ratio H-point standard addition method (RHPSAM) and compensated area under the curve (CAUC). The proposed methods were successfully applied for the determination of the minor component TZH below its concentration range. The methods were validated as per ICH guidelines where accuracy, repeatability, inter-day precision and robustness were found to be within the acceptable limits. The results obtained from the proposed methods were statistically compared with official ones where no significant difference was observed. No difference was observed between the obtained results when compared to the reported HPLC method, which proved that the developed methods could be alternative to HPLC techniques in quality control laboratories.
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Affiliation(s)
- Hayam M Lotfy
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr-El Aini, 11562 Cairo, Egypt; Pharmaceutical Chemistry department, Faculty of Pharmaceutical sciences & Pharmaceutical industries, Future University in Egypt (FUE), 12311 Cairo, Egypt
| | - Sarah S Saleh
- Analytical Chemistry Department, Faculty of Pharmacy, October University for Modern Sciences and Arts (MSA), 11787 6th October, Egypt.
| | - Nagiba Y Hassan
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr-El Aini, 11562 Cairo, Egypt
| | - Hesham Salem
- Analytical Chemistry Department, Faculty of Pharmacy, Deraya University, Minia, Egypt
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5
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Salem H, Lotfy HM, Hassan NY, El-Zeiny MB, Saleh SS. A comparative study of different aspects of manipulating ratio spectra applied for ternary mixtures: derivative spectrophotometry versus wavelet transform. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 135:1002-1010. [PMID: 25171050 DOI: 10.1016/j.saa.2014.07.078] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Revised: 07/21/2014] [Accepted: 07/28/2014] [Indexed: 06/03/2023]
Abstract
This work represents a comparative study of different aspects of manipulating ratio spectra, which are: double divisor ratio spectra derivative (DR-DD), area under curve of derivative ratio (DR-AUC) and its novel approach, namely area under the curve correction method (AUCCM) applied for overlapped spectra; successive derivative of ratio spectra (SDR) and continuous wavelet transform (CWT) methods. The proposed methods represent different aspects of manipulating ratio spectra of the ternary mixture of Ofloxacin (OFX), Prednisolone acetate (PA) and Tetryzoline HCl (TZH) combined in eye drops in the presence of benzalkonium chloride as a preservative. The proposed methods were checked using laboratory-prepared mixtures and were successfully applied for the analysis of pharmaceutical formulation containing the cited drugs. The proposed methods were validated according to the ICH guidelines. A comparative study was conducted between those methods regarding simplicity, limitation and sensitivity. The obtained results were statistically compared with those obtained from the reported HPLC method, showing no significant difference with respect to accuracy and precision.
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Affiliation(s)
- Hesham Salem
- Analytical Chemistry Department, Faculty of Pharmacy, October University for Modern Sciences and Arts (MSA), 11787 6th October City, Egypt
| | - Hayam M Lotfy
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr-El Aini Street, 11562 Cairo, Egypt
| | - Nagiba Y Hassan
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr-El Aini Street, 11562 Cairo, Egypt
| | - Mohamed B El-Zeiny
- Analytical Chemistry Department, Faculty of Pharmacy, Modern University for Technology and Information (MTI), 12582 Al Hadaba Al Wosta, Cairo, Egypt
| | - Sarah S Saleh
- Analytical Chemistry Department, Faculty of Pharmacy, October University for Modern Sciences and Arts (MSA), 11787 6th October City, Egypt.
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Salem H, Hassan NY, Lotfy HM, Saleh SS. Column performance study of different variants of liquid chromatographic technique: an application on pharmaceutical ternary mixtures containing tetryzoline. J Chromatogr Sci 2014; 53:708-15. [PMID: 25217705 DOI: 10.1093/chromsci/bmu109] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Indexed: 11/12/2022]
Abstract
High-performance liquid chromatography (HPLC), ultra-performance liquid chromatography (UPLC) and rapid resolution liquid chromatographic (RRLC) methods have been developed and validated for the separation and quantitation of both or either of two ternary mixtures present in ophthalmic solutions. The first mixture contains chloramphenicol, dexamethasone sodium phosphate and tetryzoline HCl (TZH); while the second one contains ofloxacin, prednisolone acetate and TZH. Both preparations contain benzalkonium chloride as a preservative. The columns used were a HPLC column (C18 5 µm particle size), a RRLC column (C18 2.6 µm particle size) and a UPLC column (C18 1.7 µm particle size). A comparative study was conducted to illustrate the effect of the change in column particle size and dimensions on the other chromatographic conditions, backpressure and the separation of both ternary mixtures. The methods were validated as per ICH guidelines where accuracy, repeatability, interday precision and robustness were found to be within the acceptable limits. The RRLC column provided shorter run time and better resolution than HPLC, while the UPLC column gave the shortest run time for all columns. The RRLC column resulted in minimum backpressure, so it could be used with any HPLC instrument, which makes the method more practical and economic. The results obtained from the proposed methods were statistically compared with official ones where no significant difference was observed.
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Affiliation(s)
- Hesham Salem
- Analytical Chemistry Department, Faculty of Pharmacy, October University for Modern Sciences and Arts (MSA), 6th October City 11787, Egypt
| | - Nagiba Y Hassan
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr-El Aini Street, Cairo 11562, Egypt
| | - Hayam M Lotfy
- Analytical Chemistry Department, Faculty of Pharmacy, Cairo University, Kasr-El Aini Street, Cairo 11562, Egypt
| | - Sarah S Saleh
- Analytical Chemistry Department, Faculty of Pharmacy, October University for Modern Sciences and Arts (MSA), 6th October City 11787, Egypt
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9
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Neelgund GM, Magadum SR, Budni ML. Electron donor-acceptor interaction of 3,4-dimethylaniline with 2,3-dicyano-1,4-naphthoquinone. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 78:480-487. [PMID: 21147022 DOI: 10.1016/j.saa.2010.11.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2010] [Revised: 10/23/2010] [Accepted: 11/15/2010] [Indexed: 05/30/2023]
Abstract
The electron donor-acceptor (EDA) interaction between 2,3-dicyano-1,4-naphthoquinone (DCNQ) and 3,4-dimethylaniline (3,4-DMA) is studied in chloroform, dichloromethane and 1:1 (v/v) mixture of chloroform and dichloromethane. The rate of formation of the product was measured as a function of time using UV-vis spectrophotometer. The formation constant (K) and molar extinction coefficient (ɛ) values for the formation of EDA complex were evaluated in the temperature range of 20-35°C. The pseudo-first-order rate constant (k1) and the second-order rate constant (k2) for the disappearance of EDA complex and for the formation of product were evaluated. The activation parameters (ΔH#, ΔS# and ΔG#) of the reaction were determined by temperature dependence of rate constants using the Arrhenius plots. The effect of relative permittivity of the medium on the reaction is discussed. The observed results indicate that formation of final product proceeds through initial formation of EDA complex as an intermediate. The product of the reaction was purified by column chromatography method and identified as 3-(N-3,4-dimethyl-phenylamino)-2-cyano-1,4-naphthoquinone by elemental analysis, IR and NMR spectroscopy. On the basis of kinetic, analytical and spectroscopic results, a plausible mechanism for the formation of EDA complex and its transformation into product is proposed.
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Affiliation(s)
- Gururaj M Neelgund
- P.G. Department of Studies in Chemistry, Karnatak University, Dharwad 580 003, India.
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Witlicki EH, Hansen SW, Christensen M, Hansen TS, Nygaard SD, Jeppesen JO, Wong EW, Jensen L, Flood AH. Determination of Binding Strengths of a Host−Guest Complex Using Resonance Raman Scattering. J Phys Chem A 2009; 113:9450-7. [DOI: 10.1021/jp905202x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Edward H. Witlicki
- Chemistry Department, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, Department of Physics and Chemistry, University of Southern Denmark, Odense University, Campusvej 55, 5230 Odense M, Denmark, Atomate Corporation, 2665-D Park Center Drive, Simi Valley, California 93065, and Department of Chemistry, The Pennsylvania State University, 104 Chemistry Building, University Park, Pennsylvania 16802
| | - Stinne W. Hansen
- Chemistry Department, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, Department of Physics and Chemistry, University of Southern Denmark, Odense University, Campusvej 55, 5230 Odense M, Denmark, Atomate Corporation, 2665-D Park Center Drive, Simi Valley, California 93065, and Department of Chemistry, The Pennsylvania State University, 104 Chemistry Building, University Park, Pennsylvania 16802
| | - Martin Christensen
- Chemistry Department, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, Department of Physics and Chemistry, University of Southern Denmark, Odense University, Campusvej 55, 5230 Odense M, Denmark, Atomate Corporation, 2665-D Park Center Drive, Simi Valley, California 93065, and Department of Chemistry, The Pennsylvania State University, 104 Chemistry Building, University Park, Pennsylvania 16802
| | - Thomas S. Hansen
- Chemistry Department, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, Department of Physics and Chemistry, University of Southern Denmark, Odense University, Campusvej 55, 5230 Odense M, Denmark, Atomate Corporation, 2665-D Park Center Drive, Simi Valley, California 93065, and Department of Chemistry, The Pennsylvania State University, 104 Chemistry Building, University Park, Pennsylvania 16802
| | - Sune D. Nygaard
- Chemistry Department, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, Department of Physics and Chemistry, University of Southern Denmark, Odense University, Campusvej 55, 5230 Odense M, Denmark, Atomate Corporation, 2665-D Park Center Drive, Simi Valley, California 93065, and Department of Chemistry, The Pennsylvania State University, 104 Chemistry Building, University Park, Pennsylvania 16802
| | - Jan O. Jeppesen
- Chemistry Department, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, Department of Physics and Chemistry, University of Southern Denmark, Odense University, Campusvej 55, 5230 Odense M, Denmark, Atomate Corporation, 2665-D Park Center Drive, Simi Valley, California 93065, and Department of Chemistry, The Pennsylvania State University, 104 Chemistry Building, University Park, Pennsylvania 16802
| | - Eric W. Wong
- Chemistry Department, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, Department of Physics and Chemistry, University of Southern Denmark, Odense University, Campusvej 55, 5230 Odense M, Denmark, Atomate Corporation, 2665-D Park Center Drive, Simi Valley, California 93065, and Department of Chemistry, The Pennsylvania State University, 104 Chemistry Building, University Park, Pennsylvania 16802
| | - Lasse Jensen
- Chemistry Department, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, Department of Physics and Chemistry, University of Southern Denmark, Odense University, Campusvej 55, 5230 Odense M, Denmark, Atomate Corporation, 2665-D Park Center Drive, Simi Valley, California 93065, and Department of Chemistry, The Pennsylvania State University, 104 Chemistry Building, University Park, Pennsylvania 16802
| | - Amar H. Flood
- Chemistry Department, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, Department of Physics and Chemistry, University of Southern Denmark, Odense University, Campusvej 55, 5230 Odense M, Denmark, Atomate Corporation, 2665-D Park Center Drive, Simi Valley, California 93065, and Department of Chemistry, The Pennsylvania State University, 104 Chemistry Building, University Park, Pennsylvania 16802
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