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Turlakov G, Arias E, Moggio I, Rodríguez G, Ziolo RF, Rodríguez-Fernández OS, Mikhaylov A, Uudsemaa M, Cooper T, Rebane A. Photophysical and Electrochemical Properties of Push-Pull Oligo(ferrocenyl-phenyleneethynylene)s: Supramolecular Orders in Molecular Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:4077-4089. [PMID: 35316062 DOI: 10.1021/acs.langmuir.2c00121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
We report on the optoelectronic properties of a series of unsymmetrical π-conjugated phenyleneethynylene macromolecules bearing ferrocene (Fc) as the electron-donor group (D), (benzyl) benzoate (Bz) or benzoic acid (Ac) as the electron attractor group (A) and connected through 2,5-di(alcoxy) phenyleneethynylene(s) (nPE) with n = 1, 2, 3 as π-conjugated bridges. In the series, by increasing the distance between the electron-attracting and electron-donor groups, the push-pull effect decreases. The intramolecular charge transfer (D → π → A) was evaluated by static and dynamic spectroscopy, electrochemistry, and density functional theory (DFT) theoretical calculations. The longest oligomer Fc3PEBz formed the best optical quality films. A study at the atomic level by scanning tunneling microscopy (STM) revealed that the molecules self-assemble on highly ordered pyrolytic graphite (HOPG) in domains with a short-range order. Films are mesoporous and the molecules arrange in a lamellar-like pattern, with an edge-on conformation with respect to HOPG, where the conjugated backbones lie parallel to the surface. Two different assemblies were identified in the monoatomic film, which depends on the ferrocene-ferrocene or benzyl-benzyl interactions.
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Affiliation(s)
- Gleb Turlakov
- Centro de Investigación en Química Aplicada (CIQA), Boulevard Enrique Reyna 140, Saltillo 25294, México
| | - Eduardo Arias
- Centro de Investigación en Química Aplicada (CIQA), Boulevard Enrique Reyna 140, Saltillo 25294, México
| | - Ivana Moggio
- Centro de Investigación en Química Aplicada (CIQA), Boulevard Enrique Reyna 140, Saltillo 25294, México
| | - Geraldina Rodríguez
- Centro de Investigación en Química Aplicada (CIQA), Boulevard Enrique Reyna 140, Saltillo 25294, México
| | - Ronald F Ziolo
- Centro de Investigación en Química Aplicada (CIQA), Boulevard Enrique Reyna 140, Saltillo 25294, México
| | | | - Alexander Mikhaylov
- Physics Department, Montana State University, Bozeman, Montana 59717, United States
| | - Merle Uudsemaa
- National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia
| | - Thomas Cooper
- Materials and Manufacturing Directorate, Air Force Research Laboratory, 3005 Hobson Way, Wright-Patterson Air Force Base, Ohio 45433, United States
| | - Aleksander Rebane
- Physics Department, Montana State University, Bozeman, Montana 59717, United States
- National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia
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El Qami A, Jismy B, Akssira M, Jacquemin J, Tikad A, Abarbri M. A Ag 2CO 3/TFA-catalyzed intramolecular annulation approach to imidazo[1,2- c][1,3]oxazin-5-one derivatives. Org Biomol Chem 2022; 20:1518-1531. [PMID: 35112683 DOI: 10.1039/d1ob02352g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of 2,7-disubstituted 3-methylimidazo[1,2-c][1,3]oxazin-5-ones were synthesized in good yields via Ag2CO3/TFA-mediated intramolecular annulation of N-Boc-2-alkynyl-4-bromo(alkynyl)-5-methylimidazoles. This methodology was carried out in the presence of a catalytic amount of silver carbonate and trifluoroacetic acid in dichloroethane at 60 °C. In all experiments, only the six-membered ring product was obtained since the possible five-membered compound was not observed, proving the high regioselectivity of this approach. A complementary computational study was performed in order to rationalize the mechanism of 6-endo-dig heterocycle formation. In addition, 2-bromo-3-methyl-7-phenylimidazo[1,2-c][1,3]oxazin-5-one was used as a building block to synthesize a small library of new 2-substituted imidazo[1,2-c][1,3]oxazin-5-one derivatives through the Suzuki, Sonogashira and Heck cross coupling reactions.
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Affiliation(s)
- Abdelkarim El Qami
- Laboratoire de Physico-Chimie des Matériaux et des Electrolytes pour l'Energie (PCM2E), EA 6299, Université de Tours, Faculté des Sciences et Techniques, Avenue Monge Faculté des Sciences, Parc de Grandmont, 37200 Tours, France. .,Laboratoire de Chimie Physique et de Chimie Bioorganique, URAC 22. Université Hassan II de Casablanca, Faculté des Sciences et Techniques de Mohammedia, B.P. 146, 28800 Mohammedia, Morocco
| | - Badr Jismy
- Laboratoire de Physico-Chimie des Matériaux et des Electrolytes pour l'Energie (PCM2E), EA 6299, Université de Tours, Faculté des Sciences et Techniques, Avenue Monge Faculté des Sciences, Parc de Grandmont, 37200 Tours, France.
| | - Mohamed Akssira
- Laboratoire de Chimie Physique et de Chimie Bioorganique, URAC 22. Université Hassan II de Casablanca, Faculté des Sciences et Techniques de Mohammedia, B.P. 146, 28800 Mohammedia, Morocco
| | - Johan Jacquemin
- Laboratoire de Physico-Chimie des Matériaux et des Electrolytes pour l'Energie (PCM2E), EA 6299, Université de Tours, Faculté des Sciences et Techniques, Avenue Monge Faculté des Sciences, Parc de Grandmont, 37200 Tours, France.
| | - Abdellatif Tikad
- Laboratoire de Chimie Moléculaire et Substances Naturelles. Université Moulay Ismail, Faculté des Sciences, B.P. 11201, Zitoune, Meknès, Morocco
| | - Mohamed Abarbri
- Laboratoire de Physico-Chimie des Matériaux et des Electrolytes pour l'Energie (PCM2E), EA 6299, Université de Tours, Faculté des Sciences et Techniques, Avenue Monge Faculté des Sciences, Parc de Grandmont, 37200 Tours, France.
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Computationally approached inhibition potential of Tinospora cordifolia towards COVID-19 targets. Virusdisease 2021; 32:65-77. [PMID: 33778129 PMCID: PMC7980128 DOI: 10.1007/s13337-021-00666-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 02/02/2021] [Indexed: 12/23/2022] Open
Abstract
The recent emergence of novel coronavirus (SARS-CoV-2) has been a major threat to human society, as the challenge of finding suitable drug or vaccine is not met till date. With increasing morbidity and mortality, the need for novel drug candidates is under great demand. The investigations are progressing towards COVID-19 therapeutics. Among the various strategies employed, the use of repurposed drugs is competing along with novel drug inventions. Based on the therapeutic significance, the chemical constituents from the extract of Tinospora cordifolia belonging to various classes like alkaloids, lignans, steroids and terpenoids are investigated as potential drug candidates for COVID-19. The inhibition potential of the proposed compounds against viral spike protein and human receptor ACE2 were evaluated by computational molecular modeling (Auto dock), along with their ADME/T properties. Prior to docking, the initial geometry of the compounds were optimized by Density functional theory (DFT) method employing B3LYP hybrid functional and 6-311 + + G (d,p) basis set. The results of molecular docking and ADME/T studies have revealed 6 constituents as potential drug candidates that can inhibit the binding of SARS-CoV-2 spike protein with the human receptor ACE2 protein. The narrowed down list of constituents from Tinospora cordifolia paved way for further tuning their ability to inhibit COVID-19 by modifying the chemical structures and by employing computational geometry optimization and docking methods. Supplementary Information The online version contains supplementary material available at 10.1007/s13337-021-00666-7.
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Arumugam N, Almansour AI, Kumar RS, Soliman SM, Viswanathan E, Dege N, Karuppiah P, Al-Dhabi NA. Synthesis, X-ray structural determination and biological evaluation of novel ferrocene grafted spiroquinoxalinopyrrolidine. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129348] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Zatsikha Y, Shamova LI, Schaffner JW, Healy AT, Blesener TS, Cohen G, Wozniak B, Blank DA, Nemykin VN. Probing Electronic Communication and Excited-State Dynamics in the Unprecedented Ferrocene-Containing Zinc MB-DIPY. ACS OMEGA 2020; 5:28656-28662. [PMID: 33195918 PMCID: PMC7658947 DOI: 10.1021/acsomega.0c03764] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 10/15/2020] [Indexed: 05/08/2023]
Abstract
The electronic communication between two ferrocene groups in the electron-deficient expanded aza-BODIPY analogue of zinc manitoba-dipyrromethene (MB-DIPY) was probed by spectroscopic, electrochemical, spectroelectrochemical, and theoretical methods. The excited-state dynamics involved sub-ps formation of the charge-separated state in the organometallic zinc MB-DIPYs, followed by recovery of the ground state via charge recombination in 12 ps. The excited-state behavior was contrasted with that observed in the parent complex that lacked the ferrocene electron donors and has a much longer excited-state lifetime (670 ps for the singlet state). Much longer decay times observed for the parent complex without ferrocene confirm that the main quenching mechanism in the ferrocene-containing 4 is reflective of the ultrafast ferrocene-to-MB-DIPY core charge transfer (CT).
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Affiliation(s)
- Yuriy
V. Zatsikha
- Department
of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Liliya I. Shamova
- Department
of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Jacob W. Schaffner
- Department
of Chemistry, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Andrew T. Healy
- Department
of Chemistry, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Tanner S. Blesener
- Department
of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Gabriel Cohen
- Department
of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - Brandon Wozniak
- Department
of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - David A. Blank
- Department
of Chemistry, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Victor N. Nemykin
- Department
of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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Saikia P, Gogoi S. Isocoumarins: General Aspects and Recent Advances in their Synthesis. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800019] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Pallabi Saikia
- Department of Chemistry; Assam Kaziranga University; Jorhat - 785006 Assam India
| | - Sanjib Gogoi
- Chemical Sciences & Technology Division, CSIR - North East Institute of Science and Technology; AcSIR; Jorhat - 785006 Assam India
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Mg co-ordination with potential carcinogenic molecule acrylamide: Spectroscopic, computational and cytotoxicity studies. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.10.095] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Ketkov SY, Rychagova EA, Tzeng SY, Tzeng WB. TD DFT insights into unusual properties of excited sandwich complexes: structural transformations and vibronic interactions in Rydberg-state bis(η 6-benzene)chromium. Phys Chem Chem Phys 2018; 20:23988-23997. [DOI: 10.1039/c8cp04845b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
TD DFT calculations reveal specific features of the Jahn–Teller effect in the lowest Rydberg p state of a prototypical sandwich molecule.
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Affiliation(s)
- Sergey Y. Ketkov
- G.A. Razuvaev Institute of Organometallic Chemistry of the Russian Academy of Sciences
- Nizhny Novgorod 603950
- Russian Federation
| | - Elena A. Rychagova
- G.A. Razuvaev Institute of Organometallic Chemistry of the Russian Academy of Sciences
- Nizhny Novgorod 603950
- Russian Federation
| | | | - Wen-Bih Tzeng
- Institute of Atomic and Molecular Sciences
- Taipei 10617
- Taiwan
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