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Fonseca-López D, Ezenarro-Salcedo D, Zapata-Rivera J, Rojas RS, Hurtado JJ. Salophen-type Organocatalysts for the Cycloaddition of CO 2 and Epoxides under Solvent, Halide, and Metal-Free Conditions. ACS OMEGA 2024; 9:19385-19394. [PMID: 38708211 PMCID: PMC11064168 DOI: 10.1021/acsomega.4c00530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 02/23/2024] [Accepted: 03/26/2024] [Indexed: 05/07/2024]
Abstract
8-Formyl-7-hydroxycoumarin (A) and their derived salophen-type organocatalysts L1, L2, and L3 were used for the synthesis of cyclic carbonates from carbon dioxide (CO2) and epoxides under solvent-, halide-, and metal-free conditions. According to previous optimization tests, L1 and L2 had the best catalytic activity presenting 89 and 92% conversion toward the synthesis of 3-chloropropylene carbonate (2c) using 8 bar CO2, 100 °C at 9 h. Therefore, they were used as organocatalysts to complete the catalytic screening with 11 terminal epoxides (1a-k) exhibiting the highest TOF values of 20 and 22 h-1 using 1c and 1b, respectively. Similarly, they were tested with an internal epoxide, such as cyclohexene oxide (1l) exhibiting 72% conversion, becoming the first salophen organocatalyst to obtain cis-cyclohexane carbonate (2l) in the absence of a cocatalyst. In addition, a reaction mechanism was proposed for the formation of cyclic carbonates based on experimental data and computational techniques; these contributed in establishing a probable role of CO2 pressure along the catalysis and the hydrogen bonds that favor the stabilization of the different intermediates of the reaction.
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Affiliation(s)
- Daniela Fonseca-López
- Laboratorio
de Química Inorgánica, Catálisis y Bioinorgánica.
Departamento de Química, Facultad de Ciencias, Universidad de los Andes, Bogotá 111711, Colombia
| | - David Ezenarro-Salcedo
- Laboratorio
de Química Inorgánica, Catálisis y Bioinorgánica.
Departamento de Química, Facultad de Ciencias, Universidad de los Andes, Bogotá 111711, Colombia
| | - Jhon Zapata-Rivera
- Departamento
de Química, Facultad de Ciencias Naturales y Exactas, Universidad del Valle, Cali 760042, Colombia
| | - René S. Rojas
- Laboratorio
de Química Inorgánica, Facultad de Química y
de Farmacia, Pontificia Universidad Católica
de Chile, Santiago 6094411, Chile
| | - John J. Hurtado
- Laboratorio
de Química Inorgánica, Catálisis y Bioinorgánica.
Departamento de Química, Facultad de Ciencias, Universidad de los Andes, Bogotá 111711, Colombia
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Alkaoud AM, Alakhras AI, Ibrahim MA, Alghamdi SK, Hussein RK. In silico evaluation of a new compound incorporating 4(3H)-quinazolinone and sulfonamide as a potential inhibitor of a human carbonic anhydrase. BMC Chem 2024; 18:45. [PMID: 38433188 PMCID: PMC10910740 DOI: 10.1186/s13065-024-01150-1] [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: 01/10/2024] [Accepted: 02/21/2024] [Indexed: 03/05/2024] Open
Abstract
The present study investigates the potential of a new compound containing sulfonamide and 4(3H)-quinazolinone to inhibit the hCA-IIX enzyme using in silico methods. Density functional theory-based calculations of electronic properties have been addressed through the analysis of frontier molecular orbitals, molecule electrostatic potential, and IR and UV-vis spectroscopy data. A molecular electrostatic potential analysis predicts that the target protein will be most inhibited by the sulfonamide groups since it has the highest potential spots for electrophile and nucleophile attack. The investigated compound exhibited good ADMET properties and satisfied the Lipinski rule of drug likeness. The hCA-IIX protein binding affinity with the proposed compound was determined by molecular docking analysis, which revealed a stable conformation with more negative binding energy (-12.19 kcal/mol) than the standard AZA drug (-7.36 kcal/mol). Moreover, a molecular dynamics study confirmed the docking results through trajectory analysis. The RMSD and RMSF both showed convergence and no significant fluctuations during the simulation time, which revealed a stable interaction within the active domain of the target protein. According to these findings, the proposed compound has a good pharmacological nature and could potentially be an efficient drug against hCAIX enzymes.
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Affiliation(s)
- Ahmed M Alkaoud
- Physics Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), 11623, Riyadh, Saudi Arabia
| | - Abbas I Alakhras
- Chemistry Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), 11623, Riyadh, Saudi Arabia
| | - Moez A Ibrahim
- Physics Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), 11623, Riyadh, Saudi Arabia
| | - S K Alghamdi
- Department of Physics, Taibah University, Al-Madinah Al-Munawarah, Saudi Arabia
| | - Rageh K Hussein
- Physics Department, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), 11623, Riyadh, Saudi Arabia.
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Costa T, Cassin E, Moreirinha C, Mendo S, Caetano TS. Towards the Understanding of the Function of Lanthipeptide and TOMM-Related Genes in Haloferax mediterranei. BIOLOGY 2023; 12:biology12020236. [PMID: 36829513 PMCID: PMC9953058 DOI: 10.3390/biology12020236] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/13/2023] [Accepted: 01/20/2023] [Indexed: 02/05/2023]
Abstract
Research on secondary metabolites produced by Archaea such as ribosomally synthesized and post-translationally modified peptides (RiPPs) is limited. The genome of Haloferax mediterranei ATCC 33500 encodes lanthipeptide synthetases (medM1, medM2, and medM3) and a thiazole-forming cyclodehydratase (ycaO), possibly involved in the biosynthesis of lanthipeptides and the TOMMs haloazolisins, respectively. Lanthipeptides and TOMMs often have antimicrobial activity, and H. mediterranei has antagonistic activity towards haloarchaea shown to be independent of medM genes. This study investigated (i) the transcription of ycaO and medM genes, (ii) the involvement of YcaO in bioactivity, and (iii) the impact of YcaO and MedM-encoding genes' absence in the biomolecular profile of H. mediterranei. The assays were performed with biomass grown in agar and included RT-qPCR, the generation of knockout mutants, bioassays, and FTIR analysis. Results suggest that ycaO and medM genes are transcriptionally active, with the highest number of transcripts observed for medM2. The deletion of ycaO gene had no effect on H. mediterranei antihaloarchaea activity. FTIR analysis of medM and ycaO knockout mutants suggest that MedMs and YcaO activity might be directly or indirectly related t lipids, a novel perspective that deserves further investigation.
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Affiliation(s)
- Thales Costa
- CESAM and Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Elena Cassin
- CESAM and Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Catarina Moreirinha
- CESAM and Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
- Correspondence: (C.M.); (T.S.C.)
| | - Sónia Mendo
- CESAM and Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Tânia Sousa Caetano
- CESAM and Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal
- Correspondence: (C.M.); (T.S.C.)
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Shen SM, Li SW, Su MZ, Yao LG, Appendino G, Guo YW. Structurally Diverse Diterpenoids from the Sanya Bay Nudibranch Hexabranchus sanguineus and Its Sponge-Prey Chelonaplysilla sp. Chemistry 2023; 29:e202203858. [PMID: 36617497 DOI: 10.1002/chem.202203858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/05/2023] [Accepted: 01/06/2023] [Indexed: 01/10/2023]
Abstract
Investigation of the South China Sea nudibranch Hexabranchus sanguineus from Sanya Bay afforded, in addition to three known compounds, nine new diterpenoids of the 5,19-cycloclerodane- (sanyanolides A-D), clerodane- (sanyanolide E) and subersin- (sanyanolides F-I) type. Remarkably, six diterpenoids aforementioned from H. sanguineus were also isolated from the sponge Chelonaplysilla sp. from the same water region, suggesting a trophic relationship between H. sanguineus and Chelonaplysilla sp. The structure and absolute configuration of new compounds were established by a combination of spectroscopic data, X-ray diffraction analysis and/or time-dependent density functional theory/electronic circular dichroism calculations. A plausible biogenetic relationship between these diterpenoids, along with the chemo-ecological implications of their co-occurrence in the two organisms investigated, was proposed and discussed. In in vitro bioassays, echinoclerodane A exhibited a potent inhibitory effect (IC50 =2.81 μM) on LPS-induced inflammatory response in RAW 264.7 macrophage cells. In addition, echinoclerodane A and oculatolide showed considerable antibacterial activities with MIC values ranging from 1.0 to 8.0 μg/mL.
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Affiliation(s)
- Shou-Mao Shen
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, 201203, Shanghai, P. R. China.,School of Chinese Materia Medica, Nanjing University of Chinese Medicine, 210023, Nanjing, P. R. China
| | - Song-Wei Li
- College of Pharmaceutical Science and Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, 310014, Hangzhou, P. R. China
| | - Ming-Zhi Su
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, 264117, Yantai, Shandong, P. R. China
| | - Li-Gong Yao
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, 201203, Shanghai, P. R. China
| | - Giovanni Appendino
- Dipartimento di Scienze del Farmaco, Università del Piemonte Orientale, Largo Donegani 2, 28100, Novara, Italy
| | - Yue-Wei Guo
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Zhangjiang Hi-Tech Park, 201203, Shanghai, P. R. China.,School of Chinese Materia Medica, Nanjing University of Chinese Medicine, 210023, Nanjing, P. R. China.,Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, 264117, Yantai, Shandong, P. R. China
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Mustafa R, Fitian M, Hamilton NB, Li J, Silva WR, Punihaole D. Molecular Insights into the Binding of Linear Polyethylenimines and Single-Stranded DNA Using Raman Spectroscopy: A Quantitative Approach. J Phys Chem B 2022; 126:8404-8414. [PMID: 36222425 PMCID: PMC10413332 DOI: 10.1021/acs.jpcb.2c04939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Establishing how polymeric vectors such as polyethylenimine (PEI) bind and package their nucleic acid cargo is vital toward developing more efficacious and cost-effective gene therapies. To develop a molecular-level picture of DNA binding, we examined how the Raman spectra of PEIs report on their local chemical environment. We find that the intense Raman bands located in the 1400-1500 cm-1 region derive from vibrations with significant CH2 scissoring and NH bending character. The Raman bands that derive from these vibrations show profound intensity changes that depend on both the local dielectric environment and hydrogen bonding interactions with the secondary amine groups on the polymer. We use these bands as spectroscopic markers to assess the binding between low molecular weight PEIs and single-stranded DNA (ssDNA). Analysis of the Raman spectra suggest that PEI primarily binds via electrostatic interactions to the phosphate backbone, which induces the condensation of the ssDNA. We additionally confirm this finding by conducting molecular dynamics simulations. We expect that the spectral correlations determined here will enable future studies to investigate important gene delivery activities, including how PEI interacts with cellular membranes to facilitate cargo internalization into cells.
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Affiliation(s)
- Rusul Mustafa
- Department of Chemistry, University of Vermont, Burlington, Vermont05405, United States
| | - Maria Fitian
- Department of Chemistry and Biochemistry, Siena College, Loudonville, New York12211, United States
| | - Nicholas B Hamilton
- Department of Chemistry, University of Vermont, Burlington, Vermont05405, United States
| | - Jianing Li
- Department of Chemistry, University of Vermont, Burlington, Vermont05405, United States
| | - W Ruchira Silva
- Department of Chemistry and Biochemistry, Siena College, Loudonville, New York12211, United States
| | - David Punihaole
- Department of Chemistry, University of Vermont, Burlington, Vermont05405, United States
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6
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Whaley-Mayda L, Guha A, Tokmakoff A. Resonance conditions, detection quality, and single-molecule sensitivity in fluorescence-encoded infrared vibrational spectroscopy. J Chem Phys 2022; 156:174202. [DOI: 10.1063/5.0088435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Fluorescence-encoded Infrared (FEIR) spectroscopy is a vibrational spectroscopy technique that has recently demonstrated the capability of single-molecule sensitivity in solution without near-field enhancement. This work explores the practical experimental factors that are required for successful FEIR measurements in both the single-molecule and bulk regimes. We investigate the role of resonance conditions by performing measurements on a series of coumarin fluorophores of varying electronic transition frequencies. To analyze variations in signal strength and signal to background between molecules, we introduce an FEIR brightness metric that normalizes out measurement-specific parameters. We find that the effect of the resonance condition on FEIR brightness can be reasonably well described by the electronic absorption spectrum. We discuss strategies for optimizing detection quality and sensitivity in bulk and single-molecule experiments.
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Affiliation(s)
| | - Abhirup Guha
- The University of Chicago, United States of America
| | - Andrei Tokmakoff
- Department of Chemistry, University of Chicago, United States of America
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7
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Londero VS, Costa-Silva TA, Antar GM, Baitello JB, de Oliveira LVF, Camilo FF, Batista ANL, Batista JM, Tempone AG, Lago JHG. Antitrypanosomal Lactones from Nectandra barbellata. JOURNAL OF NATURAL PRODUCTS 2021; 84:1489-1497. [PMID: 33857368 DOI: 10.1021/acs.jnatprod.0c01303] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Twigs of Nectandra barbellata were extracted using a solution of the ionic liquid 1-butyl-3-methylimidazolium bromide (BMImBr) in H2O, assisted by microwave (MAE). After successive chromatographic steps, one sesquiterpene, costic acid, and three new related lactones, (R)-3(7)-Z-3-hexadec-21-enylidene-5-(hydroxymethyl)tetrahydrofuran-2-one (1), (R)-3(7)-Z-3-hexadecylidene-5-(hydroxymethyl)tetrahydrofuran-2-one (2), and (R)-3(7)-Z-3-docosylidene-5-(hydroxymethyl)tetrahydrofuran-2-one (3), were isolated. After structural elucidation using IR, UV, HRESIMS, NMR, ECD, and VCD, compounds 1-3 were tested against trypomastigote forms of Trypanosoma cruzi. The mechanism of action of bioactive isolated compounds was studied using different fluorescent-based approaches to investigate alterations of the plasma membrane, permeability/electric potential (ΔΨp), reactive oxygen species levels, mitochondria (electric membrane potential, ΔΨm/ATP levels), Ca2+ levels, and pH of the acidocalcisomes. In addition, in silico studies predicted no resemblance to pan assay interference compounds (PAINS).
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Affiliation(s)
- Vinicius S Londero
- Institute of Environmental, Chemical and Pharmaceutical Sciences, Federal University of São Paulo, São Paulo 05508-000, Brazil
| | - Thais A Costa-Silva
- Center for Natural and Human Sciences, Federal University of ABC, São Paulo 09210-170, Brazil
| | - Guilherme M Antar
- Department of Botany, Institute of Biosciences, University of São Paulo, São Paulo 05508-090, Brazil
| | - João B Baitello
- Dasonomy Division, Instituto Florestal, São Paulo 02377-000, Brazil
| | - Larissa V F de Oliveira
- Institute of Environmental, Chemical and Pharmaceutical Sciences, Federal University of São Paulo, São Paulo 05508-000, Brazil
| | - Fernanda F Camilo
- Institute of Environmental, Chemical and Pharmaceutical Sciences, Federal University of São Paulo, São Paulo 05508-000, Brazil
| | - Andrea N L Batista
- Institute of Chemistry, Fluminense Federal University, Rio de Janeiro 24220-900, Brazil
| | - Joao M Batista
- Institute of Science and Technology, Federal University of São Paulo, São Paulo 12231-280, Brazil
| | - Andre G Tempone
- Centre for Parasitology and Mycology, Instituto Adolfo Lutz, São Paulo 01246-902, Brazil
| | - Joao Henrique G Lago
- Center for Natural and Human Sciences, Federal University of ABC, São Paulo 09210-170, Brazil
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8
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Water-in-Oil-in-Water Nanoemulsions Containing Temulawak ( Curcuma xanthorriza Roxb) and Red Dragon Fruit ( Hylocereus polyrhizus) Extracts. Molecules 2021; 26:molecules26010196. [PMID: 33401775 PMCID: PMC7795868 DOI: 10.3390/molecules26010196] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 12/27/2020] [Accepted: 12/29/2020] [Indexed: 11/29/2022] Open
Abstract
Hydrophobic curcumin in temulawak extract and hydrophilic betacyanin in red dragon fruit extract are high-value bioactive compounds with extensive applications in functional food. In this study, these extracts were encapsulated in water-in-oil-in-water (w/o/w) nanoemulsions as a delivery system using a two-step high-energy emulsification method. PGPR and Span 20 were used as lipophilic emulsifiers for the primary w/o emulsion. The most stable w/o/w formulation with the least oil phase separation of 5% v/v consisted of w/o emulsion (15% w/w) and Tween 80 (1.5% w/w) as hydrophilic emulsifier. The formulation was characterized by a 189-nm mean droplet diameter, 0.16 polydispersity index, and –32 mV zeta potential. The freeze–thaw stability may be attributed to the combination of low w/o emulsion content and high Tween 80 concentration in the outer water phase of the w/o/w nanoemulsions used in this study. The IC50 values of the nanoemulsion and the red dragon fruit extract were similar. It means that the higher concentration of curcumin in the nanoemulsions and the lower IC50 value of temulawak extract ensured sufficient antioxidant activities of the w/o/w nanoemulsions.
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9
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Mestizo PD, Narváez DM, Pinzón-Ulloa JA, Di Bello DT, Franco-Ulloa S, Macías MA, Groot H, Miscione GP, Suescun L, Hurtado JJ. Novel complexes with ONNO tetradentate coumarin schiff-base donor ligands: x-ray structures, DFT calculations, molecular dynamics and potential anticarcinogenic activity. Biometals 2020; 34:119-140. [PMID: 33185808 DOI: 10.1007/s10534-020-00268-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 11/04/2020] [Indexed: 12/24/2022]
Abstract
The synthesis of eight novel Zn(II), Co(II), Cu(II), Ni(II) and Pt(II) complexes (2-9) derived from the ONNO tetradentate coumarin Schiff-Base donor ligands, L1 and the novel L2, was performed. All compounds were characterized by analytical, spectrometry and spectroscopy techniques. Complexes 2-4 were also characterized by DFT calculations and the structures of 5 and 6 were determined by single-crystal X-ray diffraction analysis. A cytotoxicity study was carried out through an MTT assay in the carcinogenic cell line HeLa and the noncarcinogenic cell lines HFF-1 and HaCaT. The results indicated that among all the evaluated compounds, 2 and 6 presented the best anticarcinogenic potential against HeLa cells with an IC50 of 3.5 and 4.1 µM, respectively. In addition, classical molecular dynamics simulations were performed on the synthesized coordination compounds bound to G4 DNA architectures in the scope of shedding light on their inhibition mode and the most conserved interactions that may lead to the biological activity of the compounds.
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Affiliation(s)
- Paula Daniela Mestizo
- Departamento de Química, Universidad de Los Andes, Carrera 1 No. 18A-12, 111711, Bogotá, Colombia
| | - Diana M Narváez
- Human Genetics Laboratory, Universidad de Los Andes, Carrera 1 No. 18A-12, 111711, Bogotá, Colombia
| | | | - Daniela Torres Di Bello
- Human Genetics Laboratory, Universidad de Los Andes, Carrera 1 No. 18A-12, 111711, Bogotá, Colombia
| | - Sebastian Franco-Ulloa
- COBO Computational Bio-Organic Chemistry, Chemistry Department, Universidad de Los Andes, Carrera 1 No. 18A-12, 111711, Bogotá, Colombia
| | - Mario A Macías
- Departamento de Química, Universidad de Los Andes, Carrera 1 No. 18A-12, 111711, Bogotá, Colombia
| | - Helena Groot
- Human Genetics Laboratory, Universidad de Los Andes, Carrera 1 No. 18A-12, 111711, Bogotá, Colombia
| | - Gian Pietro Miscione
- COBO Computational Bio-Organic Chemistry, Chemistry Department, Universidad de Los Andes, Carrera 1 No. 18A-12, 111711, Bogotá, Colombia
| | - Leopoldo Suescun
- Cryssmat-Lab/Cátedra de Física/DETEMA, Facultad de Química, Universidad de La República, Montevideo, Uruguay
| | - John J Hurtado
- Departamento de Química, Universidad de Los Andes, Carrera 1 No. 18A-12, 111711, Bogotá, Colombia.
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Kaewchangwat N, Thanayupong E, Jarussophon S, Niamnont N, Yata T, Prateepchinda S, Unger O, Han BH, Suttisintong K. Coumarin-Caged Compounds of 1-Naphthaleneacetic Acid as Light-Responsive Controlled-Release Plant Root Stimulators. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:6268-6279. [PMID: 32396350 DOI: 10.1021/acs.jafc.0c00138] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Six coumarin-caged compounds of 1-naphthaleneacetic acid (NAA) comprising different substituents on the coumarin moiety were synthesized and evaluated for their photophysical and chemical properties as light-responsive controlled-release plant root stimulators. The 1H NMR and HPLC techniques were used to verify the release of NAA from the caged compounds. After irradiation at 365 nm, the caged compounds exhibited the fastest release rate at t1/2 of 6.7 days and the slowest release rate at t1/2 of 73.7 days. Caged compounds at high concentrations (10-5 and 10-6 M) significantly stimulate secondary root germination while free NAA at the same level is toxic and leads to inhibition of secondary root germination. The cytotoxicity of the caged compounds against fibroblasts and vero cells were evaluated, and the results suggested that, at 10-5-10-6 M, caged compounds exhibited no significant cytotoxicity to the cells. Thus, the caged compounds of NAA in this study could be of great benefit as efficient agrochemicals.
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Affiliation(s)
- Narongpol Kaewchangwat
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Thanon Phahonyothin, Tumbon Khlong Nueng, Amphoe Khlong Luang, Pathum Thani 12120, Thailand
| | - Eknarin Thanayupong
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Thanon Phahonyothin, Tumbon Khlong Nueng, Amphoe Khlong Luang, Pathum Thani 12120, Thailand
| | - Suwatchai Jarussophon
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Thanon Phahonyothin, Tumbon Khlong Nueng, Amphoe Khlong Luang, Pathum Thani 12120, Thailand
| | - Nakorn Niamnont
- Organic Synthesis, Electrochemistry & Natural Product Research Unit, Department of Chemistry, Faculty of Science, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok 10140, Thailand
| | - Teerapong Yata
- Biochemistry Unit, Department of Physiology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Sagaw Prateepchinda
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Thanon Phahonyothin, Tumbon Khlong Nueng, Amphoe Khlong Luang, Pathum Thani 12120, Thailand
| | - Onuma Unger
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Thanon Phahonyothin, Tumbon Khlong Nueng, Amphoe Khlong Luang, Pathum Thani 12120, Thailand
| | - Bao-Hang Han
- National Center for Nanoscience and Technology (NCNST), 11 Beiyitiao Zhongguancun, 100190 Beijing, P. R. China
| | - Khomson Suttisintong
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Thanon Phahonyothin, Tumbon Khlong Nueng, Amphoe Khlong Luang, Pathum Thani 12120, Thailand
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11
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Aromatic butenolides produced by a soil ascomycete Auxarthron sp. KCB15F070 derived from a volcanic island. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151227] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Banerjee IA, Fath KR, Frayne SH, Hugo MM, Cohen B. Development of self-assembled phytosterol based nanoassemblies as vehicles for enhanced uptake of doxorubicin to HeLa cells. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 97:451-460. [DOI: 10.1016/j.msec.2018.12.037] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 11/15/2018] [Accepted: 12/11/2018] [Indexed: 02/04/2023]
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13
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Abdel-Khalek H, Shalaan E, El Salam MA, El-Sagheer AM, El-Mahalawy AM. Effect of thermal annealing on structural, linear and nonlinear optical properties of 1, 4, 5, 8-naphthalene tetracarboxylic dianhydride thin films. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.10.058] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Moreno M, Zacarias A, Porzel A, Velasquez L, Gonzalez G, Alegría-Arcos M, Gonzalez-Nilo F, Gross EKU. IR and NMR spectroscopic correlation of enterobactin by DFT. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 198:264-277. [PMID: 29550657 DOI: 10.1016/j.saa.2018.02.060] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Revised: 01/19/2018] [Accepted: 02/22/2018] [Indexed: 06/08/2023]
Abstract
Emerging and re-emerging epidemic diseases pose an ongoing threat to global health. Currently, Enterobactin and Enterobactin derivatives have gained interest, owing to their potential application in the pharmaceutical field. As it is known [J. Am. Chem. Soc (1979) 101, 20, 6097-6104], Enterobactin (H6EB) is an efficient iron carrier synthesized and secreted by many microbial species. In order to facilitate the elucidation of enterobactin and its analogues, here we propose the creation of a H6EB standard set using Density Functional Theory Infrared (IR) and NMR spectra. We used two exchange-correlation (xc) functionals (PBE including long-range corrections LC-PBE and mPW1), 2 basis sets (QZVP and 6-31G(d)) and 2 grids (fine and ultrafine) for most of the H6EB structures dependent of dihedral angles. The results show a significant difference between the OH and NH bands, while the CO amide and O(CO) IR bands are often found on top of each other. The NMR DFT calculations show a strong dependence on the xc functional, basis set, and grid used for the H6EB structure. Calculated 1H and 13C NMR spectra enable the effect of the solvent to be understood in the context of the experimental measurements. The good agreement between the experimental and the calculated spectra using LC-PBE/QZVP and ultrafine grid suggest the possibility of the systems reported here to be considered as a standard set. The dependence of electrostatic potential and frontier orbitals with the catecholamide dihedral angles of H6EB is described. The matrix-assisted laser desorption/ionization time of the flight mass spectrometry (MALDI-TOF MS) of H6EB is also reported of manner to enrich the knowledge about its reactivity.
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Affiliation(s)
- M Moreno
- University of the Basque Country, Barrio Sarriena, s/n, 48940 Leioa, Bizkaia, Spain.
| | - A Zacarias
- Max Planck Institute of Microstructure Physics, Weinberg 2, D 06120, Halle, Germany and ETSF
| | - A Porzel
- Leibniz Institute of Plant Biochemistry, Weinberg 3, D 06120 Halle, Germany
| | - L Velasquez
- Universidad Andres Bello, Facultad de Medicina, Center for Integrative Medicine and Innovative Science, Echaurren 183, Santiago, Chile
| | - G Gonzalez
- Center for Development of Nanoscience and Nanotechnology, CEDENNA, Casilla 653, Santiago, Chile; Universidad de Chile, Facultad de Ciencias, Departamento de Química, Laboratorio de Sintesis Inorganica y electroquímica, Las Palmeras 3425, Nuñoa, Santiago, Chile
| | - M Alegría-Arcos
- Universidad Andres Bello, Facultad de Ciencias Biologicas, Center for Bioinformatic and Integrative Biology, Av Republica 239, Santiago, Chile; Centro Interdisciplinario de Neurociencias de Valparaíso (CINV), Facultad de Ciencias, Universidad de Valparaíso, Valparaíso, Chile
| | - F Gonzalez-Nilo
- Universidad Andres Bello, Facultad de Ciencias Biologicas, Center for Bioinformatic and Integrative Biology, Av Republica 239, Santiago, Chile
| | - E K U Gross
- Max Planck Institute of Microstructure Physics, Weinberg 2, D 06120, Halle, Germany and ETSF
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15
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Esquivel B, Bustos-Brito C, Sánchez-Castellanos M, Nieto-Camacho A, Ramírez-Apan T, Joseph-Nathan P, Quijano L. Structure, Absolute Configuration, and Antiproliferative Activity of Abietane and Icetexane Diterpenoids from Salvia ballotiflora. Molecules 2017; 22:E1690. [PMID: 29057832 PMCID: PMC6151488 DOI: 10.3390/molecules22101690] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 09/29/2017] [Indexed: 01/22/2023] Open
Abstract
From the aerial parts of Salvia ballotiflora, eleven diterpenoids were isolated; among them, four icetexanes and one abietane (1-5) are reported for the first time. Their structures were established by spectroscopic means, mainly ¹H- and 13C-NMR, including 1D and 2D homo- and hetero-nuclear experiments. Most of the isolated diterpenoids were tested for their antiproliferative, anti-inflammatory, and radical scavenging activities using the sulforhodamine B assay on six cancer cell lines, the TPA-induced ear edema test in mice, and the reduction of the DPPH assay, respectively. Some diterpenoids showed anti-proliferative activity, these being icetexanes 6 and 3, which were the most active with IC50 (μM) = 0.27 ± 0.08 and 1.40 ± 0.03, respectively, for U251 (human glioblastoma) and IC50 (μM) = 0.0.46 ± 0.05 and 0.82 ± 0.06 for SKLU-1 (human lung adenocarcinoma), when compared with adriamycin (IC50 (μM) = 0.08 ± 0.003 and 0.05 ± 0.003, as the positive control), respectively. Compounds 3 and 10 showed significant reduction of the induced ear edema of 37.4 ± 2.8 and 25.4 ± 3.0% (at 1.0 μmol/ear), respectively. Compound 4 was the sole active diterpenoid in the antioxidant assay (IC50 = 98. 4 ± 3.3), using α-tocopherol as the positive control (IC50 (μM) = 31.7 ± 1.04). The diterpenoid profile found is of chemotaxonomic relevance and reinforces the evolutionary link of S. ballotiflora with other members of the section Tomentellae.
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Affiliation(s)
- Baldomero Esquivel
- Instituto de Química, Universidad Nacional Autónoma de México (UNAM), Circuito Exterior, Ciudad Universitaria, Mexico City 04510, Mexico.
| | - Celia Bustos-Brito
- Instituto de Química, Universidad Nacional Autónoma de México (UNAM), Circuito Exterior, Ciudad Universitaria, Mexico City 04510, Mexico.
| | - Mariano Sánchez-Castellanos
- Facultad de Química, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Mexico City 04510, Mexico.
| | - Antonio Nieto-Camacho
- Instituto de Química, Universidad Nacional Autónoma de México (UNAM), Circuito Exterior, Ciudad Universitaria, Mexico City 04510, Mexico.
| | - Teresa Ramírez-Apan
- Instituto de Química, Universidad Nacional Autónoma de México (UNAM), Circuito Exterior, Ciudad Universitaria, Mexico City 04510, Mexico.
| | - Pedro Joseph-Nathan
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, Mexico City 07000, Mexico.
| | - Leovigildo Quijano
- Instituto de Química, Universidad Nacional Autónoma de México (UNAM), Circuito Exterior, Ciudad Universitaria, Mexico City 04510, Mexico.
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16
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Zhu J, Yang M, Emre A, Bahng JH, Xu L, Yeom J, Yeom B, Kim Y, Johnson K, Green P, Kotov NA. Branched Aramid Nanofibers. Angew Chem Int Ed Engl 2017; 56:11744-11748. [DOI: 10.1002/anie.201703766] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 07/11/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Jian Zhu
- Department of Chemical Engineering University of Michigan Ann Arbor 48109 USA
- School of Materials Science and Engineering Nankai University Tianjin 300350 China
| | - Ming Yang
- Department of Chemical Engineering University of Michigan Ann Arbor 48109 USA
- Key Laboratory of Microsystems and Micronanostructures Manufacturing Harbin Institute of Technology Harbin 150080 China
| | - Ahmet Emre
- Department of Chemical Engineering University of Michigan Ann Arbor 48109 USA
| | - Joong Hwan Bahng
- Department of Chemical Engineering University of Michigan Ann Arbor 48109 USA
| | - Lizhi Xu
- Department of Chemical Engineering University of Michigan Ann Arbor 48109 USA
| | - Jihyeon Yeom
- Department of Chemical Engineering University of Michigan Ann Arbor 48109 USA
| | - Bongjun Yeom
- Department of Chemical Engineering University of Michigan Ann Arbor 48109 USA
| | - Yoonseob Kim
- Department of Chemical Engineering University of Michigan Ann Arbor 48109 USA
| | - Kyle Johnson
- Department of Materials Science University of Michigan Ann Arbor 48109 USA
| | - Peter Green
- Department of Materials Science University of Michigan Ann Arbor 48109 USA
- Biointerfaces Institute University of Michigan Ann Arbor 48109 USA
| | - Nicholas A. Kotov
- Department of Chemical Engineering University of Michigan Ann Arbor 48109 USA
- Department of Materials Science University of Michigan Ann Arbor 48109 USA
- Biointerfaces Institute University of Michigan Ann Arbor 48109 USA
- Department of Biomedical Engineering University of Michigan Ann Arbor 48109 USA
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17
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Zhu J, Yang M, Emre A, Bahng JH, Xu L, Yeom J, Yeom B, Kim Y, Johnson K, Green P, Kotov NA. Branched Aramid Nanofibers. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703766] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jian Zhu
- Department of Chemical Engineering University of Michigan Ann Arbor 48109 USA
- School of Materials Science and Engineering Nankai University Tianjin 300350 China
| | - Ming Yang
- Department of Chemical Engineering University of Michigan Ann Arbor 48109 USA
- Key Laboratory of Microsystems and Micronanostructures Manufacturing Harbin Institute of Technology Harbin 150080 China
| | - Ahmet Emre
- Department of Chemical Engineering University of Michigan Ann Arbor 48109 USA
| | - Joong Hwan Bahng
- Department of Chemical Engineering University of Michigan Ann Arbor 48109 USA
| | - Lizhi Xu
- Department of Chemical Engineering University of Michigan Ann Arbor 48109 USA
| | - Jihyeon Yeom
- Department of Chemical Engineering University of Michigan Ann Arbor 48109 USA
| | - Bongjun Yeom
- Department of Chemical Engineering University of Michigan Ann Arbor 48109 USA
| | - Yoonseob Kim
- Department of Chemical Engineering University of Michigan Ann Arbor 48109 USA
| | - Kyle Johnson
- Department of Materials Science University of Michigan Ann Arbor 48109 USA
| | - Peter Green
- Department of Materials Science University of Michigan Ann Arbor 48109 USA
- Biointerfaces Institute University of Michigan Ann Arbor 48109 USA
| | - Nicholas A. Kotov
- Department of Chemical Engineering University of Michigan Ann Arbor 48109 USA
- Department of Materials Science University of Michigan Ann Arbor 48109 USA
- Biointerfaces Institute University of Michigan Ann Arbor 48109 USA
- Department of Biomedical Engineering University of Michigan Ann Arbor 48109 USA
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18
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2 H -Pyran-2-ones and their annelated analogs as multifaceted building blocks for the fabrication of diverse heterocycles. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.02.028] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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19
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Basire M, Mouhat F, Fraux G, Bordage A, Hazemann JL, Louvel M, Spezia R, Bonella S, Vuilleumier R. Fermi resonance in CO2: Mode assignment and quantum nuclear effects from first principles molecular dynamics. J Chem Phys 2017; 146:134102. [DOI: 10.1063/1.4979199] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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21
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Premvardhan L, Robert B, Hiller RG. Pigment organisation in the membrane-intrinsic major light-harvesting complex of Amphidinium carterae: Structural characterisation of the peridinins and chlorophylls a and c2 by resonance Raman spectroscopy and from sequence analysis. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2015; 1847:1187-99. [DOI: 10.1016/j.bbabio.2015.05.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 05/05/2015] [Accepted: 05/06/2015] [Indexed: 01/05/2023]
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22
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Kish E, Mendes Pinto MM, Bovi D, Basire M, Guidoni L, Vuilleumier R, Robert B, Spezia R, Mezzetti A. Fermi Resonance as a Tool for Probing Peridinin Environment. J Phys Chem B 2014; 118:5873-81. [DOI: 10.1021/jp501667t] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Elizabeth Kish
- Institut de Biologie
et de Technologie de Saclay, CEA, and UMR 8221, CNRS, Bat 532, CEA Saclay, 91191 Gif/Yvette, France
| | - Maria Manuela Mendes Pinto
- Institut de Biologie
et de Technologie de Saclay, CEA, and UMR 8221, CNRS, Bat 532, CEA Saclay, 91191 Gif/Yvette, France
| | - Daniele Bovi
- Dipartemento
di Fisica, “La Sapienza” Università di Roma, P.le Aldo Moro
5, 00185 Rome, Italy
| | - Marie Basire
- Département
de Chimie, Ecole Normale Supérieure, 24, rue Lhomond, 75005 Paris, France
- UPMC Univ
Paris
06, UMR 8640 CNRS-ENS-UPMC, 4, Place Jussieu, 75005 Paris, France
| | - Leonardo Guidoni
- Dipartimento
di Scienze Fisiche e Chimiche, Università degli studi dell’Aquila, Via Vetoio, Coppito, 67100 L’Aquila, Italy
| | - Rodolphe Vuilleumier
- Département
de Chimie, Ecole Normale Supérieure, 24, rue Lhomond, 75005 Paris, France
- UPMC Univ
Paris
06, UMR 8640 CNRS-ENS-UPMC, 4, Place Jussieu, 75005 Paris, France
| | - Bruno Robert
- Institut de Biologie
et de Technologie de Saclay, CEA, and UMR 8221, CNRS, Bat 532, CEA Saclay, 91191 Gif/Yvette, France
| | - Riccardo Spezia
- CNRS, LAMBE UMR 8587, Université d’Evry-Val-d’Essonne, 91025 Evry Cedex, France
| | - Alberto Mezzetti
- Institut de Biologie
et de Technologie de Saclay, CEA, and UMR 8221, CNRS, Bat 532, CEA Saclay, 91191 Gif/Yvette, France
- LASIR UMR 8516, Université Lille I Bat. C5, Cité Scientifique, 59655 Villeneuve
d’Ascq, France
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23
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Wan H, Vitter A, Chaudhari RV, Subramaniam B. Kinetic investigations of unusual solvent effects during Ru/C catalyzed hydrogenation of model oxygenates. J Catal 2014. [DOI: 10.1016/j.jcat.2013.09.020] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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24
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Bovi D, Mezzetti A, Vuilleumier R, Gaigeot MP, Chazallon B, Spezia R, Guidoni L. Environmental effects on vibrational properties of carotenoids: experiments and calculations on peridinin. Phys Chem Chem Phys 2011; 13:20954-64. [PMID: 21946923 DOI: 10.1039/c1cp21985e] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Carotenoids are employed in light-harvesting complexes of dinoflagellates with the two-fold aim to extend the spectral range of the antenna and to protect it from radiation damage. We have studied the effect of the environment on the vibrational properties of the carotenoid peridinin in different solvents by means of vibrational spectroscopies and QM/MM molecular dynamics simulations. Three prototypical solvents were considered: cyclohexane (an apolar/aprotic solvent), deuterated acetonitrile (a polar/aprotic solvent) and methanol (a polar/protic solvent). Thanks to effective normal mode analysis, we were able to assign the experimental Raman and IR bands and to clarify the effect of the solvent on band shifts. In the 1500-1650 cm(-1) region, seven vibrational modes of the polyene chain were identified and assigned to specific molecular vibrations. In the 1700-1800 cm(-1) region a strong progressive down-shift of the lactonic carbonyl frequency is observed passing from cyclohexane to methanol solutions. This has been rationalized here in terms of solvent polarity and solute-solvent hydrogen bond interactions. On the basis of our data we propose a classification of non-equivalent peridinins in the Peridinin-Chlorophyll-Proteins, light-harvesting complexes of dinoflagellates.
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Affiliation(s)
- Daniele Bovi
- Dipartimento di Fisica, Università di Roma LA SAPIENZA, Rome, Italy
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25
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Ramoji A, Yenagi J, Tonannavar J, Jadhav VB, Kulkarni MV. Vibrational and ab initio studies of 3-acetyl-6-bromocoumarin and 3-acetyl-6-methylcoumarin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 77:1039-1047. [PMID: 20855229 DOI: 10.1016/j.saa.2010.08.070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2010] [Revised: 08/17/2010] [Accepted: 08/26/2010] [Indexed: 05/29/2023]
Abstract
Infrared absorption and Raman spectra (3500-50 cm(-1)) of 3-acetyl-6-bromocoumarin and 3-acetyl-6-methylcoumarin have been measured and interpreted, aided by electronic structure calculations at RHF and B3LYP using 6-31(d, p) basis set. It has been determined that the rotation of the acetyl group with respect to the coumarin ring results in three conformers--two trans and one cis--for each molecule, with one trans conformer being the most stable in both cases. There are significant changes in the vibrational structure as characterized by positions and intensities of certain modes in going from 3-acetyl-6-bromocoumarin to 3-acetyl-6-methylcoumarin. The carbonyl stretching mode of the pyrone ring is stable in both molecules whereas the same mode in acetyl groups is not. Ring stretching vibrations are coupled to C-H in-plane bending vibrations. Down-shifting of frequencies of methyl vibrations in acetyl group occurs vis-à-vis methyl vibrations in 3-acetyl-6-methylcoumarin. A strong Raman band at 126 cm(-1) in both molecules is structure-independent non-genuine mode, correlated to lattice vibrations in the solid phase.
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Affiliation(s)
- Anuradha Ramoji
- Institute for Physical Chemistry, Friedrich Schiller University, Jena, Germany
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26
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27
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Breda S, Reva I, Fausto R. Molecular structure and vibrational spectra of 2(5H)-furanone and 2(5H)-thiophenone isolated in low temperature inert matrix. J Mol Struct 2008. [DOI: 10.1016/j.molstruc.2008.02.034] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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28
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Al-Saadi AA, Laane J. Vibrational Spectra, Ab Initio Calculations, and Ring-Puckering Potential Energy Function for γ-Crotonolactone. J Phys Chem A 2007; 111:3302-5. [PMID: 17428040 DOI: 10.1021/jp068601l] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The infrared and Raman spectra of liquid and vapor gamma-crotonolactone have been collected. Both the experimental data and ab initio calculations show that the molecule is rigidly planar in its electronic ground state. This conclusion agrees with the previously reported microwave studies and is attributed to the conjugation between the C=C and C=O double bonds of the ring. The ring-puckering potential energy function was generated from ab initio calculations and was confirmed by the vapor-phase Raman spectra to be nearly harmonic. Density functional theory (DFT) calculations predict a harmonic ring-puckering frequency of 203 cm(-1) as compared to the observed vapor-phase Raman value of 208 cm(-1). The DFT calculations were also used to compute the infrared and Raman spectra of gamma-crotonolactone, and these agree very well with the experimental spectra.
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Affiliation(s)
- Abdulaziz A Al-Saadi
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, USA
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29
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Molecular structure of complexes with a bifurcated hydrogen bond. 5. Dimers of 3-hydroxy-2-methyl-4-pyrone in inert media. Chem Heterocycl Compd (N Y) 2006. [DOI: 10.1007/s10593-006-0256-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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30
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Sortur V, Yenagi J, Tonannavar J, Jadhav VB, Kulkarni MV. Fourier transform-infrared and Raman spectra, ab initio calculations and assignments for 6-methyl-4-bromomethylcoumarin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2006; 64:301-7. [PMID: 16644266 DOI: 10.1016/j.saa.2005.07.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2005] [Revised: 07/06/2005] [Accepted: 07/09/2005] [Indexed: 05/08/2023]
Abstract
Fourier transform-infrared (4000-400 cm-1) and Raman (3500-50 cm-1) spectral measurements have been made for 6-methyl-4-bromomethylcoumarin. Equilibrium structures, harmonic vibrational frequencies, infrared intensities, and depolarization ratios have been computed at RHF/6-31G* and B3LYP/6-31G* levels of theory. Twisting CH2Br moiety in the geometry optimization leads to the most stable conformer lacking symmetry (C1). This is reflected in the richness of bands in the experimental spectra. A complete assignments of the bands, aided by the ab initio calculations, has been proposed for the 6-methyl-4-bromomethylcoumarin. Due to lack of symmetry, several normal vibrations have been found to be mixed ones.
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31
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Lindig C. Partialsynthesen von Cardenoliden und Cardenolid-Analogen. X. Synthese 22-O-substituierter Cardenolide sowie Untersuchungen über den oxidativen Abbau von Cardenoliden mit Kaliumpermanganat. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/prac.19863280504] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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32
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Albers-Schönberg G, Schmid H. Über die Struktur von Plumericin, Isoplumericin, β-Dihydroplumericin und der β-Dihydroplumericinsäure. Helv Chim Acta 2004. [DOI: 10.1002/hlca.19610440604] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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34
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Edler J, Hamm P. Two-dimensional vibrational spectroscopy of the amide I band of crystalline acetanilide: Fermi resonance, conformational substates, or vibrational self-trapping? J Chem Phys 2003. [DOI: 10.1063/1.1586694] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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35
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Xue ZY, Schrader G. Transient FTIR Studies of the Reaction Pathway forn-Butane Selective Oxidiation over Vanadyl Pyrophosphate. J Catal 1999. [DOI: 10.1006/jcat.1999.2452] [Citation(s) in RCA: 20] [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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37
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Perlaki R, Markó L, Gervasio G, Sappa E, Pályi G. Synthesis and structure of diamine-substituted butene-2-olide-4-ylidene-4-cobalt carbonyl complexes. J Organomet Chem 1995. [DOI: 10.1016/0022-328x(95)05651-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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39
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Bowden K, Etemadi R, Ranson RJ. Reactions of carbonyl compounds in basic solutions. Part 17. The alkaline hydrolysis of substituted (E)-5,5′-diphenylbifuranylidenediones and 3,7-diphenylpyrano[4,3-c]pyran-1,5-diones. ACTA ACUST UNITED AC 1991. [DOI: 10.1039/p29910000743] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Kim S, Frech R. Coupling interaction between the sulfate ion ν2 modes and the lithium modes in LiKSO4. J Chem Phys 1988. [DOI: 10.1063/1.454054] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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41
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Courault K, Lindig C. Partialsynthesen von Cardenoliden und Cardenolid-Analogen. XIII. Synthese substituierter 14,21-Epoxy-5?,14?-card-20(22)-enolide. ACTA ACUST UNITED AC 1988. [DOI: 10.1002/prac.19883300316] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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42
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Do N, Baerns M. Effect of support material on the adsorption structures of furan and maleic anhydride on the surface of V2O5/P2O5 catalysts. ACTA ACUST UNITED AC 1988. [DOI: 10.1016/s0166-9834(00)82389-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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43
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Vibrational spectra, scaled quantum-mechanical (SQM) force field and assignments for 4H-pyran-4-one. ACTA ACUST UNITED AC 1986. [DOI: 10.1016/0584-8539(86)80043-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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