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Synthesis, structure, NBO, Hirshfeld surface, NMR, HOMO-LUMO, UV, photoluminescence, z scan, vibrational and thermal analysis of piperazinedi-ium tetrakis (μ2‑chloro)-diaqua-dichloro-di-cadmium single crystal. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132685] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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2
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Chen F, Fan J, Chen X, Li Y, Liang C, Ren S, Xue R. Polymorph control of 5-fluorouracil during a ball milling process. CrystEngComm 2021. [DOI: 10.1039/d1ce01211h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Polymorph control of 5-fluorouracil was achieved by ball milling. Forms II and III were prepared separately through ball milling with different amounts of ethanol as an additive at the same period without influencing each other.
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Affiliation(s)
- Fenghua Chen
- School of Resources and Chemical Engineering, Sanming University, Sanming 365004, Fujian, China
- Fujian Engineering Research Center for Advanced Fluorine-containing Materials, Sanming 365004, Fujian, China
| | - Jie Fan
- School of Resources and Chemical Engineering, Sanming University, Sanming 365004, Fujian, China
| | - Xiuzhi Chen
- School of Resources and Chemical Engineering, Sanming University, Sanming 365004, Fujian, China
| | - Yanping Li
- School of Resources and Chemical Engineering, Sanming University, Sanming 365004, Fujian, China
| | - Chengfeng Liang
- School of Resources and Chemical Engineering, Sanming University, Sanming 365004, Fujian, China
| | - Shizhao Ren
- School of Resources and Chemical Engineering, Sanming University, Sanming 365004, Fujian, China
| | - Rongrong Xue
- School of Resources and Chemical Engineering, Sanming University, Sanming 365004, Fujian, China
- Fujian Engineering Research Center for Advanced Fluorine-containing Materials, Sanming 365004, Fujian, China
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3
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Rzepiela K, Buczek A, Kupka T, Broda MA. Factors Governing the Chemical Stability and NMR Parameters of Uracil Tautomers and Its 5-Halogen Derivatives. Molecules 2020; 25:E3931. [PMID: 32872098 PMCID: PMC7504704 DOI: 10.3390/molecules25173931] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 08/21/2020] [Accepted: 08/26/2020] [Indexed: 01/10/2023] Open
Abstract
We report on the density functional theory (DFT) modelling of structural, energetic and NMR parameters of uracil and its derivatives (5-halogenouracil (5XU), X = F, Cl, Br and I) in vacuum and in water using the polarizable continuum model (PCM) and the solvent model density (SMD) approach. On the basis of the obtained results, we conclude that the intramolecular electrostatic interactions are the main factors governing the stability of the six tautomeric forms of uracil and 5XU. Two indices of aromaticity, the harmonic oscillator model of aromaticity (HOMA), satisfying the geometric criterion, and the nuclear independent chemical shift (NICS), were applied to evaluate the aromaticity of uracil and its derivatives in the gas phase and water. The values of these parameters showed that the most stable tautomer is the least aromatic. A good performance of newly designed xOPBE density functional in combination with both large aug-cc-pVQZ and small STO(1M)-3G basis sets for predicting chemical shifts of uracil and 5-fluorouracil in vacuum and water was observed. As a practical alternative for calculating the chemical shifts of challenging heterocyclic compounds, we also propose B3LYP calculations with small STO(1M)-3G basis set. The indirect spin-spin coupling constants predicted by B3LYP/aug-cc-pVQZ(mixed) method reproduce the experimental data for uracil and 5-fluorouracil well.
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Affiliation(s)
| | | | - Teobald Kupka
- Department of Physical Chemistry and Molecular Modeling, Faculty of Chemistry, University of Opole, 48 Oleska Street, 45−052 Opole, Poland; (K.R.); (A.B.)
| | - Małgorzata A. Broda
- Department of Physical Chemistry and Molecular Modeling, Faculty of Chemistry, University of Opole, 48 Oleska Street, 45−052 Opole, Poland; (K.R.); (A.B.)
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4
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Banerjee P, Mondal D, Ghosh M, Mukherjee D, Nandi PK, Maiti TK, Sarkar N. Selective Self-Assembly of 5-Fluorouracil through Nonlinear Solvent Response Modulates Membrane Dynamics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2707-2719. [PMID: 32097563 DOI: 10.1021/acs.langmuir.9b03544] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Controllable self-assembly and understanding of the interaction between single metabolite fibrils and live-cell membranes have paramount importance in providing minimal treatment in several neurodegenerative disorders. Here, utilizing the nonlinear nature and peculiar hydrogen bonding behavior of the dimethyl sulfoxide (DMSO)-water mixture, the selective self-assembly of a single metabolite 5-fluorouracil (5-FU) is achieved. A direct correlation between water availability and selective self-assembly of 5-FU is ratified from the excited-state dynamics. The specific fibrillar structures of 5-FU exhibit a great potential to modulate live cell membrane fluidity and model membrane lipid distribution. After 5-FU fibril addition, a disorder of H-bonded water molecules arises several layers beyond the first hydration shell of the polar headgroups, which essentially modifies interfacial water structure and dynamics. Overall, our results shed light on the role of solvent to govern specific self-assembly and also lay the foundation accounting for the earlier stage of several diseases and multidrug resistance.
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Affiliation(s)
- Pavel Banerjee
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Dipankar Mondal
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Meghna Ghosh
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Devdeep Mukherjee
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Pratyush Kiran Nandi
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Tapas Kumar Maiti
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Nilmoni Sarkar
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
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5
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Zhang J, Li X. The effect of water-mediated catalysis on the intramolecular proton-transfer reactions of the isomers of 5-chlorouracil: a theoretical study. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2019; 75:554-561. [PMID: 31062712 DOI: 10.1107/s2053229619004856] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 04/09/2019] [Indexed: 11/10/2022]
Abstract
The geometrical structures and thermal energies (E), enthalpies (H) and Gibbs free energies (G) of 13 isomers of 5-chlorouracil (5ClU) in the gas and water phases were investigated using the density functional theory (DFT) method at the M06-2X/6-311++g(3df,3pd) level. The isomers of 5ClU can be microhydrated at different molecular target sites. The mono- and dihydrated forms are the most stable in both the gas and water phases, and, because of the intermolecular interactions, the hydrations lead to a degree of change in the stability trend. Two types of isomerizations were considered: the internal H-O bond rotations in which the H atom rotates 180° around the C-O bond and the intramolecular proton-transfer reactions in which an H atom is transferred between an O atom and a neighbouring N atom. The forward and backward energy barriers for isomerizations of nonhydrated 5ClU were calculated. In addition, 16 optimized transition-state structures for water-mediated catalysis on isomerizations of 5ClU were investigated. The forward and backward proton-transfer energy barriers of water-mediated catalysis on isomerizations of 5ClU were obtained. The results indicate that the catalytic effect of two H2O molecules is much greater than that of one H2O molecule in isomerizations of 5ClU.
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Affiliation(s)
- Jian Zhang
- School of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, People's Republic of China
| | - Xiu Li
- School of Chemistry and Material Science, Shanxi Normal University, Linfen 041004, People's Republic of China
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6
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Abdrakhimova G, Ovchinnikov M, Lobov A, Spirikhin L, Khursan S, Ivanov S. 5-Chlorouracil and 5-bromouracil acid-base equilibrium study in water and DMSO by NMR spectroscopy. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.01.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Alcolea Palafox M, Rastogi VK, Singh SP. FT-IR and FT-Raman spectra of 5-chlorocytosine: Solid state simulation and tautomerism. Effect of the chlorine substitution in the Watson-Crick base pair 5-chlorodeoxycytidine-deoxyguanosine. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 188:418-435. [PMID: 28756258 DOI: 10.1016/j.saa.2017.07.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 04/26/2017] [Accepted: 07/13/2017] [Indexed: 06/07/2023]
Abstract
The laser Raman and IR spectra of 5-chlorocytosine have been recorded and accurately assigned in the solid state using Density functional calculations (DFT) together with the linear scaling equation procedure (LSE) and the solid state simulation of the crystal unit cell through a tetramer form. These results remarkably improve those reported previously by other authors. Several new scaling equations were proposed to be used in related molecules. The six main tautomers of the biomolecule 5-chlorocytosine were determined and optimized at the MP2 and CCSD levels, using different basis sets. The relative stabilities were compared with those obtained in cytosine and their 5-halo derivatives. Several relationships between energies, geometric parameters and NBO atomic charges were established. The effect of the chlorine substitution in the fifth position was evaluated through the stability of the Watson-Crick (WC) base pair of 5-chlorodeoxycytidine with deoxyguanosine, and through their vibrational spectra.
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Affiliation(s)
- M Alcolea Palafox
- Nofima AS - the Norwegian Institute of Food, Fisheries and Aquaculture Research, PB 210, N-1431 Ås, Norway; Departamento de Química-Física I, Facultad de Ciencias Químicas, Universidad Complutense, Ciudad Universitaria, Madrid 28040, Spain.
| | - V K Rastogi
- Internet Lab, R.D. Foundation Group of Institutions, NH-58, Kadrabad, Modinagar, Ghaziabad, India; Indian Spectroscopy Society, KC 68/1, Old Kavinagar, Ghaziabad 201 002, India.
| | - S P Singh
- Department of Physics, Dr B R Ambedkar Govt Degree College, Mainpuri 205 001, India
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8
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Moisescu-Goia C, Muresan-Pop M, Simon V. New solid state forms of antineoplastic 5-fluorouracil with anthelmintic piperazine. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.08.076] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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9
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Astolfi P, Giorgini E, Gambini V, Rossi B, Vaccari L, Vita F, Francescangeli O, Marchini C, Pisani M. Lyotropic Liquid-Crystalline Nanosystems as Drug Delivery Agents for 5-Fluorouracil: Structure and Cytotoxicity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:12369-12378. [PMID: 29023126 DOI: 10.1021/acs.langmuir.7b03173] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Lyotropic cubic liquid-crystalline systems have received increasing attention due to their unique microstructural and physicochemical properties as efficient nanocarriers for drug delivery. We report the preparation and characterization of bulk phases and cubosome dispersions of phytantriol loaded with the anticancer drug 5-fluorouracil, in neutral and anionic forms. In both cases, a Pn3m cubic phase was observed. The phytantriol phase behavior can be influenced by the addition of ionic agents, and, to this purpose, a positively charged lipid, such as N-[1-(2,3-dioleoyloxy)propyl]-N,N,N-trimethylammonium chloride salt (DOTAP), was included in the studied formulations. It was found to induce a variation of the spontaneous membrane curvature of the phytantriol lipid bilayer, generating a transition from the Pn3m to the Im3m cubic phase. When 5-fluorouracil, in its anionic form (5-FUs), was encapsulated in these latter systems, a further transition to the HII hexagonal phase was observed as a consequence of the formation of a complex phytantriol/DOTAP/5-FUs. The physicochemical characterization was performed with various complementary techniques including synchrotron small-angle X-ray scattering, dynamic light scattering, and attenuated total reflection Fourier transform infrared and UV resonance Raman spectroscopies. Encapsulation of 5-fluorouracil in the corresponding nanodispersions was evaluated, and their in vitro cytotoxicity was assessed in MDA-MB-231 cell line. Phytantriol cubosomes containing 5-fluorouracil showed a higher toxicity compared with the bare drug solution, and hence they represent potential nanocarriers in the delivery of 5-fluorouracil for cancer therapy.
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Affiliation(s)
- Paola Astolfi
- Dipartimento SIMAU, Università Politecnica delle Marche , via Brecce Bianche, 60131 Ancona, Italy
| | - Elisabetta Giorgini
- Dipartimento DISVA, Università Politecnica delle Marche , via Brecce Bianche, 60131 Ancona, Italy
| | - Valentina Gambini
- Dipartimento di Bioscienze e Biotecnologie, Università di Camerino , Via Gentile III da Varano, 62032 Camerino, Macerata, Italy
| | - Barbara Rossi
- Elettra - Sincrotrone Trieste S.C.p.A. , S.S. 14 - km 163.5, 34149 Basovizza, Trieste, Italy
| | - Lisa Vaccari
- Elettra - Sincrotrone Trieste S.C.p.A. , S.S. 14 - km 163.5, 34149 Basovizza, Trieste, Italy
| | - Francesco Vita
- Dipartimento SIMAU, Università Politecnica delle Marche , via Brecce Bianche, 60131 Ancona, Italy
| | - Oriano Francescangeli
- Dipartimento SIMAU, Università Politecnica delle Marche , via Brecce Bianche, 60131 Ancona, Italy
| | - Cristina Marchini
- Dipartimento di Bioscienze e Biotecnologie, Università di Camerino , Via Gentile III da Varano, 62032 Camerino, Macerata, Italy
| | - Michela Pisani
- Dipartimento SIMAU, Università Politecnica delle Marche , via Brecce Bianche, 60131 Ancona, Italy
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Banerjee P, Mukherjee D, Maiti TK, Sarkar N. Unveiling the Self-Assembling Behavior of 5-Fluorouracil and its N,N'-Dimethyl Derivative: A Spectroscopic and Microscopic Approach. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:10978-10988. [PMID: 28930474 DOI: 10.1021/acs.langmuir.7b02378] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Under physiological conditions, 5-fluorouracil (5-FU), an anticancer drug, self-assembles into fibrils by strong hydrogen-bonding network, whereas its N,N'-dimethyl derivative, 5-fluoro-1,3-dimethyluracil (5-FDMU), does not make fibrils due to lack of strong hydrogen-bonding motif. In vitro, 5-FU self-assembly is sensitive to physicochemical conditions like the pH and ionic strength of the solution, which tune the strength of the noncovalent driving forces. Here we report a surprising finding that the buffer, which is necessary to control the pH and is typically considered to be inert, also significantly influences 5-FU self-assembly, which indicates an important role of counterions in the fibril formation. We have also monitored concentration- and time-dependent fibrillar growth of 5-FU. Again, fibril growth process is probed under dynamic conditions using microfluidic platform. The self-assembly of 5-FU compared with its N,N'-dimethyl derivative shows lower cytotoxicity to the cultured human erythroleukemic cells (K562 cells), which plausibly states the reason behind the greater effectiveness of 5-FU derivative drugs than 5-FU itself.
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Affiliation(s)
- Pavel Banerjee
- Department of Chemistry, Indian Institute of Technology , Kharagpur 721302, West Bengal, India
| | - Devdeep Mukherjee
- Department of Biotechnology, Indian Institute of Technology , Kharagpur 721302, West Bengal, India
| | - Tapas Kumar Maiti
- Department of Biotechnology, Indian Institute of Technology , Kharagpur 721302, West Bengal, India
| | - Nilmoni Sarkar
- Department of Chemistry, Indian Institute of Technology , Kharagpur 721302, West Bengal, India
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11
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Mohamed HS, Dahy AA, Hassan GS, Eid SSM, Mahfouz RM. Quantum-chemical investigation on 5-fluorouracil anticancer drug. Struct Chem 2017. [DOI: 10.1007/s11224-017-0913-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Towards interference free HPLC-SERS for the trace analysis of drug metabolites in biological fluids. J Pharm Biomed Anal 2016; 136:38-43. [PMID: 28063334 DOI: 10.1016/j.jpba.2016.12.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 12/05/2016] [Accepted: 12/07/2016] [Indexed: 11/21/2022]
Abstract
Sofosbuvir metabolite, 2'-deoxy-2'-fluoro-2'-C-methyluridine (PSI-6206) was studied for the first time by surface enhanced Raman spectroscopy (SERS) using the paper-based SERS substrate. The quantification limit of PSI-6206 by SERS was found to be 13ngL-1 (R2 value=0.959, RSD=5.23%). For the structural and quantitative analysis of PSI-6206 in blood plasma, an interference-free HPLC-SERS method was developed and compared to HPLC-DAD and HPLC-MS methods. The SERS quantification of the drug by the paper substrate was 4 orders of magnitude more sensitive than that by the diode array detector. In addition, the SERS detection provided unique structural identification of the drug in blood plasma, similar to Mass spectroscopy detector. Due to the disposable nature of the SERS substrate, the new method does not suffer from the known "memory effect" which is known to lead to false positive identification in traditional HPLC-SERS methods. Therefore, the presented HPLC-paper SERS platform holds great potential for the sensitive and cost effective determination of drugs and their metabolites in biological fluids.
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13
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A DFT analysis of the molecular structure, vibrational spectra and other molecular properties of 5-nitrouracil and comparison with uracil. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.10.096] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Al-Shalalfeh MM, Saleh TA, Al-Saadi AA. Silver colloid and film substrates in surface-enhanced Raman scattering for 2-thiouracil detection. RSC Adv 2016. [DOI: 10.1039/c6ra14832h] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Surface-enhanced Raman scattering-based silver substrates were designed and fabricated for the detection of 2-thiouracil (2-TU).
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Affiliation(s)
- Mutasem M. Al-Shalalfeh
- Department of Chemistry
- King Fahd University of Petroleum & Minerals
- Dhahran 31261
- Saudi Arabia
| | - Tawfik A. Saleh
- Department of Chemistry
- King Fahd University of Petroleum & Minerals
- Dhahran 31261
- Saudi Arabia
| | - Abdulaziz A. Al-Saadi
- Department of Chemistry
- King Fahd University of Petroleum & Minerals
- Dhahran 31261
- Saudi Arabia
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15
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Spectroscopic and electronic structure calculation of a potential chemotherapeutic agent 5-propyl-6-(p-tolylsulfanyl)pyrimidine-2,4(1H,3H)-dione using first principles. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.07.042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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16
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Sun S, Brown A. Simulation of the Resonance Raman Spectra for 5-Halogenated (F, Cl, and Br) Uracils. J Phys Chem A 2015; 119:3961-71. [DOI: 10.1021/acs.jpca.5b01052] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shuai Sun
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Alex Brown
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
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17
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Cuellar A, Alcolea Palafox M, Rastogi VK, Kiefer W, Schlücker S, Rathor SK. FT-IR and FT-Raman spectra of 5-fluoroorotic acid with solid state simulation by DFT methods. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 132:430-445. [PMID: 24887505 DOI: 10.1016/j.saa.2014.04.107] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Revised: 04/11/2014] [Accepted: 04/22/2014] [Indexed: 06/03/2023]
Abstract
FT-Raman and FT-IR studies of the biomolecule 5-fluoroorotic acid in the solid state were carried out. The unit cell found in the crystal was simulated as a tetramer form by density functional calculations. They were performed to clarify wavenumber assignments of the experimental observed bands in the spectra. Correlations with the molecule of uracil were made, and specific scale equations were employed to scale the wavenumbers of 5-fluoroorotic acid. Good reproduction of the experimental wavenumbers is obtained and the % error is very small in the majority of the bands. This fact confirms our simplified solid state model. The molecular structure was fully optimized using DFT and MP2 methods. The relative stability of both the syn and anti conformations was investigated, and the anti-form was found to be slightly more stable, by 7.49 kJ/mol at the MP2 level. The structures of all possible tautomeric forms were determined. The keto-form appeared as the most stable one. The NBO atomic charges and several thermodynamic parameters were also calculated.
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Affiliation(s)
- A Cuellar
- Departamento de Química-Física I, Facultad de Ciencias Químicas, Universidad Complutense, Madrid 28040, Spain
| | - M Alcolea Palafox
- Departamento de Química-Física I, Facultad de Ciencias Químicas, Universidad Complutense, Madrid 28040, Spain.
| | - V K Rastogi
- R D Foundation Group of Institutions, NH-58, Kadrabad, Modinagar, Ghaziabad, India; Indian Spectroscopy Society, KC 68/1, Old Kavinagar, Ghaziabad 201 002, India.
| | - W Kiefer
- University of Würzburg, Institute for Physical and Theoretical Chemistry, Am Hubland, D-97074 Würzburg, Germany
| | - S Schlücker
- University of Duisburg-Essen, Faculty of Chemistry, Universitätsstr. 5, D-45141 Essen, Germany
| | - S K Rathor
- Indian Spectroscopy Society, KC 68/1, Old Kavinagar, Ghaziabad 201 002, India
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18
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Brovarets’ OO, Yurenko YP, Hovorun DM. The significant role of the intermolecular CH⋯O/N hydrogen bonds in governing the biologically important pairs of the DNA and RNA modified bases: a comprehensive theoretical investigation. J Biomol Struct Dyn 2014; 33:1624-52. [DOI: 10.1080/07391102.2014.968623] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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19
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Ortiz S, Alvarez-Ros MC, Palafox MA, Rastogi VK, Balachandran V, Rathor SK. FT-IR and FT-Raman spectra of 6-chlorouracil: molecular structure, tautomerism and solid state simulation. A comparison between 5-chlorouracil and 6-chlorouracil. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 130:653-668. [PMID: 24856263 DOI: 10.1016/j.saa.2014.04.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 03/27/2014] [Accepted: 04/01/2014] [Indexed: 06/03/2023]
Abstract
A Raman and IR study of the biomolecule 6-chlorouracil was carried out in the solid state. The unit cell found in the crystal was simulated as a tetramer form by density functional calculations. Specific scale factors and scaling equations deduced from uracil molecule were employed in the predicted wavenumbers of 6-chlorouracil. The scaled wavenumbers were used in the reassignment of the IR and Raman experimental bands. Good reproduction of the experimental wavenumbers is obtained and the % error is very small in the majority of cases. A comparison between the molecular structure and charge distribution of 6-chlorouracil and 5-chlorouracil molecules was presented. The effect of the hydration with the PCM model in the molecular structure and charges was discussed. The optimum tautomers of 6-chlorouracil were optimized and analyzed. Six of them were related to those of uracil molecule. The effect of the halogen substitution in the sixth position of the pyrimidine ring in the stability of the different tautomers was evaluated. HOMO and LUMO orbital energy analysis were carried out.
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Affiliation(s)
- S Ortiz
- Departamento de Química-Física-I, Facultad de Ciencias Químicas, UCM, Madrid 28040, Spain
| | - M C Alvarez-Ros
- Departamento de Química-Física-I, Facultad de Ciencias Químicas, UCM, Madrid 28040, Spain
| | - M Alcolea Palafox
- Departamento de Química-Física-I, Facultad de Ciencias Químicas, UCM, Madrid 28040, Spain.
| | - V K Rastogi
- R.D. Foundation Group of Institutions, NH-58, Kadrabad, Modinagar, Ghaziabad, India; Indian Spectroscopy Society, KC-68/1, Old Kavinagar, Ghaziabad 201 002, India.
| | - V Balachandran
- Department of Physics, Arignar Anna Government Arts College, Musiri, Tiruchirappalli 621211, India
| | - S K Rathor
- Indian Spectroscopy Society, KC-68/1, Old Kavinagar, Ghaziabad 201 002, India
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Díaz MS, Luiz MM. Photodegradation of antibiotic 5-sulfaminouracil in the presence of vitamin B2: a kinetic study. Redox Rep 2014; 20:17-25. [PMID: 25158978 DOI: 10.1179/1351000214y.0000000100] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
OBJECTIVE This paper studies the kinetics and mechanism of the sensitized photodegradation of 5-sulfaminouracil (SFU). This compound is a synthetic bacteriostatic belonging to the sulfa drugs, usually detected in surface water and effluent wastewater. METHODS SFU interacts with electronically excited singlet and triplet states of riboflavin (Rf), (1)Rf* and (3)Rf*, respectively. The rate constants for these processes were determined in MeOH-H2O by stationary fluorescence spectroscopy (for kQ(1)) and by laser flash photolysis (for kQ(3)). RESULTS SFU is photodegraded by visible light irradiation in the presence of the natural sensitizer (Rf). In competitive processes, (3)Rf* generates the reactive oxygen species superoxide radical anion (O2(•-)) and singlet molecular oxygen [O2((1)Δg)], which are involved in SFU photodegradation. In aqueous solutions, where SFU adopts different forms depending on the pH of the medium, the participation of O2((1)Δg) is predominant. Therefore, the O2((1)Δg)-mediated mechanism was evaluated at pHs 7 and 12, employing perinaphthenone as a synthetic photosensitizer. DISCUSSION The results indicate that SFU is photodegraded through a relatively efficient process in a neutral environment, whereas it is quickly degraded in alkaline media. This is attributed to the ionization of the sulfamino- group, a substituent in the uracil molecule that exerts an activating power on the molecule. Thus, sensitized photodegradation may be an important tool to reduce the environmental impact of SFU.
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Affiliation(s)
- Shuai Sun
- Department
of Chemistry, University of Alberta, 11227 Saskatchewan Drive NW, Edmonton, AB T6G
2G2, Canada
| | - Alex Brown
- Department
of Chemistry, University of Alberta, 11227 Saskatchewan Drive NW, Edmonton, AB T6G
2G2, Canada
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Muñoz Freán S, Alcolea Palafox M, Rastogi V. Effect of the microhydration on the tautomerism in the anticarcinogenic drug 5-fluorouracil and relationships with other 5-haloderivatives. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.09.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Alcolea Palafox M, Rastogi VK, Kumar S, Joe H. The biomolecule of 5-bromocytosine: FT-IR and FT-Raman spectra and DFT calculations. Identification of the tautomers in the isolated state and simulation the spectra in the solid state. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 111:104-122. [PMID: 23608134 DOI: 10.1016/j.saa.2013.03.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 02/18/2013] [Accepted: 03/03/2013] [Indexed: 06/02/2023]
Abstract
An accurate assignment of the IR spectrum in Ar matrix of 5-bromocytosine and of the IR and Raman spectra in the solid state was carried out. For this purpose Density functional calculations (DFTs) were performed to clarify wavenumber assignments of the experimental observed bands. The calculated values were scaled using scaling equations and they were compared with IR and Raman experimental data. Good reproduction of the experimental wavenumbers is obtained and the% error is very small in the majority of cases. In the isolated state all the tautomer forms of 5-bromocytosine were determined and optimized. The wavenumbers corresponding to C1 and C2b tautomers were identified and assigned in the IR experimental spectrum reported in Ar matrix. Our study confirms the existence of at least two tautomers, the amino-oxo and the amino-hydroxy in the isolated state. In the solid state the FT-IR and FT-Raman spectra of 5-bromocytosine in the powder form were recorded in the region 400-4000 cm(-1) and 50-3500 cm(-1), respectively. The unit cell found in the crystal was simulated as a tetramer form in three tautomers. Thus, it has been possible to assign all the 33 normal modes of vibration. The study indicates that the features, that are the characteristic of the vibrational spectra of cytosine, are retained by the spectra of 5-bromocytosine and it exists in the solid phase in the amino-oxo form.
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Affiliation(s)
- M Alcolea Palafox
- Departamento de Química-Física I, Facultad de Ciencias Químicas, Universidad Complutense, Madrid 28040, Spain.
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Singh VP, Tiwari K, Mishra M. Synthesis, spectral and thermal studies of some polymeric mixed ligand uracil–hydrazide complexes with transition metal ions. Des Monomers Polym 2012. [DOI: 10.1080/15685551.2012.747164] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Affiliation(s)
- Vinod P. Singh
- a Department of Chemistry , Banaras Hindu University , Varanasi , 221005 , India
| | - Karishma Tiwari
- a Department of Chemistry , Banaras Hindu University , Varanasi , 221005 , India
| | - Monika Mishra
- a Department of Chemistry , Banaras Hindu University , Varanasi , 221005 , India
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Ortiz S, Alcolea Palafox M, Rastogi VK, Tomer R. Solid state simulation of tetramer form of 5-aminoorotic acid: the vibrational spectra and molecular structure study by using MP2 and DFT calculations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 97:948-962. [PMID: 22922643 DOI: 10.1016/j.saa.2012.06.048] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Revised: 05/04/2012] [Accepted: 06/25/2012] [Indexed: 06/01/2023]
Abstract
The Raman and IR spectra of the biomolecule 5-aminoorotic acid in the solid state were simulated by a dimer and tetramer forms, with the special interest in the interactions that involve the NH and NH(2) groups. The unit cell expected in the crystal was simulated as a tetramer form by density functional calculations. They were performed to clarify wavenumber assignments of the experimentally observed bands in the spectra. Correlations with the molecule of uracil were made, and accurate scaling procedures deduced by us were employed in the calculated wavenumbers of 5-aminoorotic acid. Good reproduction of the experimental wavenumbers is obtained and the % error is very small in the majority of cases. This fact confirms our simplified solid state model. The scaling leads to a reassignment of the IR and Raman experimental bands. The NBO atomic charges and several thermodynamic parameters were also calculated.
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Affiliation(s)
- S Ortiz
- Departamento de Química-Física I, Facultad de Ciencias Químicas, Universidad Complutense, Madrid 28040, Spain
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26
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Huynh TP, Pietrzyk-Le A, Bikram K C C, Noworyta KR, Sobczak JW, Sharma PS, D'Souza F, Kutner W. Electrochemically synthesized molecularly imprinted polymer of thiophene derivatives for flow-injection analysis determination of adenosine-5'-triphosphate (ATP). Biosens Bioelectron 2012; 41:634-41. [PMID: 23131778 DOI: 10.1016/j.bios.2012.09.038] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 09/16/2012] [Accepted: 09/21/2012] [Indexed: 12/18/2022]
Abstract
Two selective chemosensors for adenosine-5'-triphosphate (ATP) determination featuring molecularly imprinted polymer (MIP) film recognition units were fabricated. For imprinting, three different thiophene derivatives were used as functional monomers. That is, the uracil substituent of bis(2,2'-bithienyl)methane 2 complementarily H-bond paired the adenine moiety of ATP, the boronic acid substituent of thiophene 3 covalently bound vicinal diols of the ribofuranose moiety, and amide substituents of bis(2,2'-bithienyl)methanes 4 bound to the pyrophosphate moieties. Different binding motifs adopted for the ATP recognition and the structure of the supramolecular pre-polymerization complex were optimized with the DFT computing at the B3LYP/3-21G((*)) level. MIP films were prepared by potentiodynamic electropolymerization of this complex with the imprinting factor of 9.47±0.2. An analytical signal was transduced with a 10-MHz resonator of EQCM and a Pt electrode for the piezoelectric microgravimetry (PM) and capacitive impedometry (CI) determination of ATP, respectively, under FIA conditions. Analytical properties of the MIP film were unraveled by spectroscopic ellipsometry, XPS, IRRAS, and DPV. The limit of detection was 0.1 and 0.2 μM for the PM and CI chemosensor, respectively, being an order of magnitude lower than the ATP concentration in biological systems. Moreover, cross-selectivity was demonstrated with the adenosine-5'-diphosphate (ADP) imprinting and ATP discrimination.
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Affiliation(s)
- Tan-Phat Huynh
- Institute of Physical Chemistry (IPC PAS), Kasprzaka 44/52, 01-224 Warsaw, Poland
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Veeraiah A, Chaitanya K, Veeraiah V, Prasad MVS, Udaya Sri N. Vibrational and electronic spectra of 5-Acetyluracil - an experimental and theoretical study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 95:648-657. [PMID: 22579332 DOI: 10.1016/j.saa.2012.04.070] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 04/07/2012] [Accepted: 04/14/2012] [Indexed: 05/31/2023]
Abstract
The vibrational and electronic properties of 5-Acetyluracil have been investigated in the ground state using experimental techniques (FT-IR, FT-Raman and UV spectra) and density functional theory (DFT) employing B3LYP exchange correlation with the 6-31G(d,p) basis set. The theoretically calculated optimized parameters, vibrational frequencies, etc., were compared with the experimental values, which yield good agreement between the observed and calculated values. The complete assignments of fundamental modes were performed on the basis of the potential energy distribution (PED). UV-vis spectrum of the compound was recorded in the region of 300-700 nm and compared with the theoretical spectrum obtained from time-dependent DFT(TD-DFT). Fluorescence microscopic imaging studies proved that the compound can be used as one of the potential light sources in the green region.
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Affiliation(s)
- A Veeraiah
- Molecular Spectroscopy Laboratories, Department of Physics, Andhra University, Visakhapatnam, India.
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Bakkialakshmi S, Chandrakala D. A spectroscopic investigations of anticancer drugs binding to bovine serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 88:2-9. [PMID: 22226896 DOI: 10.1016/j.saa.2011.10.076] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2011] [Revised: 10/15/2011] [Accepted: 10/28/2011] [Indexed: 05/31/2023]
Abstract
The binding of anticancer drugs (i) Uracil (U), (ii) 5-Fluorouracil (5FU) and (iii) 5-Chlorouracil (5ClU), to bovine serum albumin (BSA) at two levels of temperature was studied by the fluorescence of quenching method. UV/Vis, time-resolved fluorescence, Fourier transform infrared spectroscopy (FTIR), proton nuclear magnetic resonance ((1)H NMR) and scanning electron microscope (SEM) analyses were also made. Binding constants (K(a)) and binding sites (n) at various levels of temperature were calculated. The obtained binding sites were found to be equal to one for all the three quenchers (U, 5FU and 5ClU) at two different temperature levels. Thermodynamic parameters ΔH, ΔG and ΔS have been calculated and were presented in tables. Change in FTIR absorption intensity shows strong binding of anticancer drugs to BSA. Changes in chemical shifts of NMR and fluorescence lifetimes of the drugs indicate the presence of interaction and binding of BSA to anticancer drugs. (1)H NMR spectra and SEM photographs also conform this binding.
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Affiliation(s)
- S Bakkialakshmi
- Department of Physics, Annamalai University, Annamalai nagar, Tamil Nadu, India.
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Carneiro CEA, Berndt G, de Souza Junior IG, de Souza CMD, Paesano A, da Costa ACS, di Mauro E, de Santana H, Zaia CTBV, Zaia DAM. Adsorption of adenine, cytosine, thymine, and uracil on sulfide-modified montmorillonite: FT-IR, Mössbauer and EPR spectroscopy and X-ray diffractometry studies. ORIGINS LIFE EVOL B 2011; 41:453-68. [PMID: 21717172 DOI: 10.1007/s11084-011-9244-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Accepted: 06/18/2011] [Indexed: 10/18/2022]
Abstract
In the present work the interactions of nucleic acid bases with and adsorption on clays were studied at two pHs (2.00, 7.00) using different techniques. As shown by Mössbauer and EPR spectroscopies and X-ray diffractometry, the most important finding of this work is that nucleic acid bases penetrate into the interlayer of the clays and oxidize Fe(2+) to Fe(3+), thus, this interaction cannot be regarded as a simple physical adsorption. For the two pHs the order of the adsorption of nucleic acid bases on the clays was: adenine ≈ cytosine > thymine > uracil. The adsorption of adenine and cytosine on clays increased with decreasing of the pH. For unaltered montmorillonite this result could be explained by electrostatic forces between adenine/cytosine positively charged and clay negatively charged. However for montmorillonite modified with Na(2)S, probably van der Waals forces also play an important role since both adenine/cytosine and clay were positively charged. FT-IR spectra showed that the interaction between nucleic acid bases and clays was through NH(+) or NH (2) (+) groups. X-ray diffractograms showed that nucleic acid bases adsorbed on clays were distributed into the interlayer surface, edge sites and external surface functional groups (aluminol, silanol) EPR spectra showed that the intensity of the line g ≈ 2 increased probably because the oxidation of Fe(2+) to Fe(3+) by nucleic acid bases and intensity of the line g = 4.1 increased due to the interaction of Fe(3+) with nucleic acid bases. Mössbauer spectra showed a large decreased on the Fe(2+) doublet area of the clays due to the reaction of nucleic acid bases with Fe(2+).
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Affiliation(s)
- Cristine E A Carneiro
- Laboratório de Química Prebiótica, Departamento de Química-CCE, Universidade Estadual de Londrina, PR, Brazil
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Rastogi VK, Palafox MA. Vibrational spectra, tautomerism and thermodynamics of anticarcinogenic drug: 5-fluorouracil. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 79:970-977. [PMID: 21664177 DOI: 10.1016/j.saa.2011.04.008] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2010] [Revised: 03/08/2011] [Accepted: 04/07/2011] [Indexed: 05/30/2023]
Abstract
The FT-IR and FT-Raman spectra of 5-Fluorouracil were recorded in the solid phase in the regions 400-4000 cm(-1) and 50-4000 cm(-1), respectively. The vibrational spectra were analysed and the observed fundamentals were assigned to different normal modes of vibration. The experimental wavenumbers were compared with the scaled vibrational values using DFT methods: the Ar matrix data were related to gas phase calculations, while the values of the solid state spectra were compared to those with dimer simulations. The study indicates that some features that are characteristic of vibrational spectra of uracil and its derivatives are retained in the spectrum of 5-fluorouracil and it exists in ketonic form in the solid phase. The tautomerism was also studied and the spectra of the two most stable forms were simulated. The calculated wavenumbers have been employed to yield thermodynamic properties.
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Affiliation(s)
- V K Rastogi
- Department of Physics, CCS University, Meerut 250 004, India.
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