1
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Raksat A, Atanu MSH, Mendez S, Zerda RDL, Sun R, Cheenpracha S, Wall M, Simmons CJ, Williams PG, Tan GT, Wongwiwatthananukit S, Chang LC. Bioassay-Guided Isolation and Identification of Cytotoxic Compounds from Melaleuca quinquenervia Fruits. ACS OMEGA 2024; 9:18516-18525. [PMID: 38680310 PMCID: PMC11044245 DOI: 10.1021/acsomega.4c00769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/22/2024] [Accepted: 03/28/2024] [Indexed: 05/01/2024]
Abstract
The fruit extract of Melaleuca quinquenervia yielded a total of 19 compounds, including two novel spiro-biflavonoid enantiomers (1a and 1b) and a chalcone derivative (3). Their structures were determined through spectroscopic analysis. The enantiomers of the racemic mixture of compound 1 were successfully resolved into (+)-1 and (-)-1 using chiral-phase HPLC. Single-crystal X-ray diffraction analysis was also used to confirm the structure of 1. The enantiomeric configurations of 1 and 2 were determined through a comparison of the calculated and experimental electronic circular dichroism spectra. Compounds 2 (melanervin), 14 (methyl betulinate), 15 (3-O-acetylbetulinic acid), and 16 (pyracrenic acid) were found to be highly cytotoxic, with compound 16 showing superior growth inhibition of nonsmall cell lung cancer cells (A549 cells) (IC50 2.8 ± 0.1 μM) compared to cisplatin (IC50 3.3 ± 0.0 μM), a positive control chemotherapeutic drug. Both compound 16 and cisplatin were significantly more cytotoxic toward A549 lung cancer cells compared to nontumorigenic Vero E6 cells.
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Affiliation(s)
- Achara Raksat
- Department
of Pharmaceutical Sciences, The Daniel K. Inouye College of Pharmacy, University of Hawai‘i at Hilo, Hilo, Hawaii 96720, United States
| | - Md Samiul Huq Atanu
- Department
of Pharmaceutical Sciences, The Daniel K. Inouye College of Pharmacy, University of Hawai‘i at Hilo, Hilo, Hawaii 96720, United States
| | - Sheyanne Mendez
- X-ray
Diffraction Laboratory, Department of Chemistry, University of Hawai‘i at Hilo, 200 West Kawili Street, Hilo, Hawai‘i 96720, United States
| | - Rafael de la Zerda
- Department
of Chemistry, University of Hawai‘i
at Manoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Rui Sun
- Department
of Chemistry, University of Hawai‘i
at Manoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Sarot Cheenpracha
- Division
of Chemistry, School of Science, University
of Phayao, Phayao 56000, Thailand
| | - Marisa Wall
- Daniel
K. Inouye U.S. Pacific Basin Agricultural Research Center, Hilo, Hawaii 96720, United States
| | - Charles J. Simmons
- X-ray
Diffraction Laboratory, Department of Chemistry, University of Hawai‘i at Hilo, 200 West Kawili Street, Hilo, Hawai‘i 96720, United States
| | - Philip G. Williams
- Department
of Chemistry, University of Hawai‘i
at Manoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Ghee T. Tan
- Department
of Pharmaceutical Sciences, The Daniel K. Inouye College of Pharmacy, University of Hawai‘i at Hilo, Hilo, Hawaii 96720, United States
| | - Supakit Wongwiwatthananukit
- Department
of Pharmacy Practice, The Daniel K. Inouye College of Pharmacy, University of Hawai‘i at Hilo, Hilo, Hawaii 96720, United States
| | - Leng Chee Chang
- Department
of Pharmaceutical Sciences, The Daniel K. Inouye College of Pharmacy, University of Hawai‘i at Hilo, Hilo, Hawaii 96720, United States
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2
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Fedunov RG, Pozdnyakov IP, Mikheylis AV, Melnikov AA, Chekalin SV, Glebov EM. Primary photophysical and photochemical processes for cerium ammonium nitrate (CAN) in acetonitrile. Photochem Photobiol Sci 2024; 23:781-792. [PMID: 38546955 DOI: 10.1007/s43630-024-00554-1] [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: 12/20/2023] [Accepted: 02/12/2024] [Indexed: 04/16/2024]
Abstract
Cerium ammonium nitrate (CAN) is an important photolytic source of NO3• radicals in aqueous nitric acid solutions and in acetonitrile. In this work we performed the study of primary photochemical processes for CAN in acetonitrile by means of ultrafast TA spectroscopy and quantum chemical calculations. Photoexcitation of CAN is followed by ultrafast (< 100 fs) intersystem crossing; the vibrationally cooled triplet state decays to pentacoordinated Ce(III) intermediate and NO3• radical with the characteristic time of ca. 40 ps. Quantum chemical (QM) calculations satisfactorily describe the UV-vis spectrum of the triplet state. An important feature of CAN photochemistry in CH3CN is the partial stabilization of the radical complex (RC) [(NH4)2CeIII(NO3)5…NO3•], which lifetime is ca. 2 μs. The possibility of the RC stabilization is supported by the QM calculations.
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Affiliation(s)
- Roman G Fedunov
- Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 3 Institutskaya Str., 630090, Novosibirsk, Russian Federation
- Novosibirsk State University, 2 Pirogova Str., 630090, Novosibirsk, Russian Federation
| | - Ivan P Pozdnyakov
- Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 3 Institutskaya Str., 630090, Novosibirsk, Russian Federation
| | - Aleksander V Mikheylis
- Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 3 Institutskaya Str., 630090, Novosibirsk, Russian Federation
| | - Alexei A Melnikov
- Institute of Spectroscopy, Russian Academy of Sciences, 5 Fizicheskaya Str., Troitsk, 119333, Moscow, Russian Federation
| | - Sergei V Chekalin
- Institute of Spectroscopy, Russian Academy of Sciences, 5 Fizicheskaya Str., Troitsk, 119333, Moscow, Russian Federation
| | - Evgeni M Glebov
- Voevodsky Institute of Chemical Kinetics and Combustion, Siberian Branch of the Russian Academy of Sciences, 3 Institutskaya Str., 630090, Novosibirsk, Russian Federation.
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3
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Shiroudi A, Czub J, Altarawneh M. Chemical Investigation on the Mechanism and Kinetics of the Atmospheric Degradation Reaction of Trichlorofluoroethene by OH⋅ and Its Subsequent Fate in the Presence of O 2 /NOx. Chemphyschem 2024; 25:e202300665. [PMID: 37983906 DOI: 10.1002/cphc.202300665] [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: 09/17/2023] [Revised: 11/17/2023] [Accepted: 11/20/2023] [Indexed: 11/22/2023]
Abstract
The M06-2X/6-311++G(d,p) level of theory was used to examine the degradation of Trichlorofluoroethene (TCFE) initiated by OH⋅ radicals. Additionally, the coupled-cluster single-double with triple perturbative [CCSD(T)] method was employed to refine the single-point energies using the complete basis set extrapolation approach. The results indicated that OH-addition is the dominant pathway. OH⋅ adds to both the C1 and C2 carbons, resulting in the formation of the C(OH)Cl2 -⋅CClF and ⋅CCl2 -C(OH)ClF species. The associated barrier heights were determined to be 1.11 and -0.99 kcal mol-1 , respectively. Furthermore, the energetic and thermodynamic parameters show that pathway 1 exhibits greater exothermicity and exergonicity compared to pathway 2, with differences of 8.11 and 8.21 kcal mol-1 , correspondingly. The primary pathway involves OH addition to the C2 position, with a rate constant of 6.2×10-13 cm3 molecule-1 sec-1 at 298 K. This analysis served to estimate the atmospheric lifetime, along with the photochemical ozone creation potential (POCP) and ozone depletion potential (ODP). It yielded an atmospheric lifetime of 8.49 days, an ODP of 4.8×10-4 , and a POCP value of 2.99, respectively. Radiative forcing efficiencies were also estimated at the M06-2X/6-311++G(d,p) level. Global warming potentials (GWPs) were calculated for 20, 100, and 500 years, resulting in values of 9.61, 2.61, and 0.74, respectively. TCFE is not expected to make a significant contribution to the radiative forcing of climate change. The results obtained from the time-dependent density functional theory (TDDFT) indicated that TCFE and its energized adducts are unable to photolysis under sunlight in the UV and visible spectrum. Secondary reactions involve the [TCFE-OH-O2 ]⋅ peroxy radical, leading subsequently to the [TCFE-OH-O]⋅ alkoxy radical. It was found that the alkoxy radical resulting from the peroxy radical can lead to the formation of phosgene (COCl2 ) and carbonyl chloride fluoride (CClFO), with phosgene being the primary product.
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Affiliation(s)
- Abolfazl Shiroudi
- Department of Physical Chemistry, Gdańsk University of Technology, Narutowicza 11/12, Gdańsk, 80-233, Poland
- BioTechMed Center, Gdańsk University of Technology, Gdańsk, 80-233, Poland
| | - Jacek Czub
- Department of Physical Chemistry, Gdańsk University of Technology, Narutowicza 11/12, Gdańsk, 80-233, Poland
- BioTechMed Center, Gdańsk University of Technology, Gdańsk, 80-233, Poland
| | - Mohammednoor Altarawneh
- United Arab Emirates University, Department of Chemical and Petroleum Engineering, Sheikh Khalifa bin Zayed Street, Al-Ain, 15551, United Arab Emirates
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4
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Scott M, Delcey MG. Complex Linear Response Functions for a Multiconfigurational Self-Consistent Field Wave Function in a High Performance Computing Environment. J Chem Theory Comput 2023; 19:5924-5937. [PMID: 37596971 PMCID: PMC10500980 DOI: 10.1021/acs.jctc.3c00317] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Indexed: 08/21/2023]
Abstract
We present novel developments for the highly efficient evaluation of complex linear response functions of a multiconfigurational self-consistent field (MCSCF) wave function as implemented in MultiPsi. Specifically, expressions for the direct evaluation of linear response properties at given frequencies using the complex polarization propagator (CPP) approach have been implemented, within both the Tamm-Dancoff approximation (TDA) and the random phase approximation (RPA). Purely real algebra with symmetric and antisymmetric trial vectors in a shared subspace is used wherein the linear response equations are solved. Two bottlenecks of large scale MC-CPP calculations, namely, the memory footprint and computational time, are addressed. The former is addressed by limiting the size of the subspace of trial vectors by using singular value decomposition (SVD) on either orbital or CI subspaces. The latter is addressed using an efficient parallel implementation as well as the strategy of dynamically adding linear response equations at near-convergence to neighboring roots. Furthermore, a novel methodology for decomposing MC-CPP spectra in terms of intuitive orbital excitations in an approximate fashion is presented. The performance of the code is illustrated with several numerical examples, including the X-ray spectrum of a molecule with nearly one hundred atoms. Additionally, for X-ray spectroscopy, the effect of including or excluding the core orbital in the active space on small covalent metal complexes is discussed.
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Affiliation(s)
- Mikael Scott
- Division
of Theoretical Chemistry and Biology, School of Engineering Sciences
in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-106 91 Stockholm, Sweden
| | - Mickael G. Delcey
- Division
of Theoretical Chemistry and Biology, School of Engineering Sciences
in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-106 91 Stockholm, Sweden
- Division
of Theoretical Chemistry, Department of Chemistry, Lund University, SE-221 00 Lund, Sweden
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5
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Kumar P, Pérez-Escribano M, van Raamsdonk DME, Escudero D. Phosphorescent Properties of Heteroleptic Ir(III) Complexes: Uncovering Their Emissive Species. J Phys Chem A 2023; 127:7241-7255. [PMID: 37597243 DOI: 10.1021/acs.jpca.3c04205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/21/2023]
Abstract
In this contribution, we assess the computational machinery to calculate the phosphorescence properties of a large pool of heteroleptic [Ir(C^N)2(N^N)]+ complexes (where N^N is an ancillary ligand and C^N is a cyclometalating ligand) including their phosphorescent rates and their emission spectra. Efficient computational protocols are next proposed. Specifically, different flavors of DFT functionals were benchmarked against DLPNO-CCSD(T) for the phosphorescence energies. The transition density matrix and decomposition analysis of the emitting triplet excited state enable us to categorize the studied complexes into different cases, from predominant triplet ligand-centered (3LC) character to predominant charge-transfer (3CT) character, either of metal-to-ligand charge transfer (3MLCT), ligand-to-ligand charge transfer (3LLCT), or a combination of the two. We have also calculated the vibronically resolved phosphorescent spectra and rates. Ir(III) complexes with predominant 3CT character are characterized by less vibronically resolved bands as compared to those with predominant 3LC character. Furthermore, some of the complexes are characterized by close-lying triplet excited states so that the calculation of their phosphorescence properties poses additional challenges. In these scenarios, it is necessary to perform geometry optimizations of higher-lying triplet excited states (i.e., Tn). We demonstrate that in the latter scenarios all of the close-lying triplet species must be considered to recover the shape of the experimental emission spectra. The global analysis of computed emission energies, shape of the computed emission spectra, computed rates, etc. enable us to unambiguously pinpoint for the first time the triplet states involved in the emission process and to provide a general classification of Ir(III) complexes with regard to their phosphorescence properties.
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Affiliation(s)
- Prashant Kumar
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | | | | | - Daniel Escudero
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
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6
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Tyutereva YE, Snytnikova OA, Fedunov RG, Yanshole VV, Plyusnin VF, Xu J, Pozdnyakov IP. Direct UV photodegradation of nalidixic acid in aqueous solutions: A mechanistic study. CHEMOSPHERE 2023; 334:138952. [PMID: 37201608 DOI: 10.1016/j.chemosphere.2023.138952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 05/04/2023] [Accepted: 05/14/2023] [Indexed: 05/20/2023]
Abstract
Mechanism of direct UV photolysis of nalidixic acid (NA), a model quinolone antibiotic, was revealed using a combination of steady-state photolysis coupled with high resolution LC-MS and DFT quantum-chemical calculations. Both quantum yields of photodegradation and detailed identification of final products were performed for the first time for two main forms of NA: neutral and anionic. The quantum yield of NA photodegradation is 0.024 and 0.0032 for the neutral and anionic forms in the presence of dissolved oxygen and 0.016/0.0032 in deoxygenated solutions, respectively. The main process is photoionization with the formation of a cation radical, which undergoes transformation into three different neutral radicals and further into final photoproducts. It is shown that the triplet state does not play a role in the photolysis of this compound. The main products of photolysis are the products of the loss of carboxyl, methyl and ethyl groups in the NA molecule, as well as the dehydrogenation of the ethyl group. The results obtained may be important for understanding the fate of pyridine herbicides in the processes of disinfection by UV and in natural waters under the action of sunlight.
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Affiliation(s)
- Yuliya E Tyutereva
- Novosibirsk State University, 630090, 2 Pirogova Str., Novosibirsk, Russian Federation; Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, 630090, 3 Institutskaya Str., Novosibirsk, Russian Federation
| | - Olga A Snytnikova
- Novosibirsk State University, 630090, 2 Pirogova Str., Novosibirsk, Russian Federation; International Tomography Center SB RAS, 630090, 3a Institutskaya Str., Novosibirsk, Russian Federation
| | - Roman G Fedunov
- Novosibirsk State University, 630090, 2 Pirogova Str., Novosibirsk, Russian Federation; Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, 630090, 3 Institutskaya Str., Novosibirsk, Russian Federation
| | - Vadim V Yanshole
- Novosibirsk State University, 630090, 2 Pirogova Str., Novosibirsk, Russian Federation; International Tomography Center SB RAS, 630090, 3a Institutskaya Str., Novosibirsk, Russian Federation
| | - Victor F Plyusnin
- Novosibirsk State University, 630090, 2 Pirogova Str., Novosibirsk, Russian Federation; Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, 630090, 3 Institutskaya Str., Novosibirsk, Russian Federation
| | - Jing Xu
- State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, 430072, Wuhan, PR China
| | - Ivan P Pozdnyakov
- Novosibirsk State University, 630090, 2 Pirogova Str., Novosibirsk, Russian Federation; Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, 630090, 3 Institutskaya Str., Novosibirsk, Russian Federation.
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7
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Dar D, Roy S, Maitra NT. Curing the Divergence in Time-Dependent Density Functional Quadratic Response Theory. J Phys Chem Lett 2023; 14:3186-3192. [PMID: 36971411 DOI: 10.1021/acs.jpclett.3c00122] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
The adiabatic approximation in time-dependent density functional theory is known to give an incorrect pole structure in the quadratic response function, leading to unphysical divergences in excited state-to-state transition probabilities and hyperpolarizabilties. We find the form of the exact quadratic response kernel and derive a practical and accurate approximation that cures the divergence. We demonstrate our results on excited state-to-state transition probabilities of a model system and of the LiH molecule.
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Affiliation(s)
- Davood Dar
- Department of Physics, Rutgers University, Newark, New Jersey 07102, United States
| | - Saswata Roy
- Department of Physics, Rutgers University, Newark, New Jersey 07102, United States
| | - Neepa T Maitra
- Department of Physics, Rutgers University, Newark, New Jersey 07102, United States
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8
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Liu F, O'Donnell TJ, Park EJ, Kovacs S, Nakamura K, Dave A, Luo Y, Sun R, Wall M, Wongwiwatthananukit S, Silva DK, Williams PG, Pezzuto JM, Chang LC. Anti-inflammatory Quinoline Alkaloids from the Roots of Waltheria indica. JOURNAL OF NATURAL PRODUCTS 2023; 86:276-289. [PMID: 36746775 DOI: 10.1021/acs.jnatprod.2c00861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Sixteen new quinoline alkaloids (1a-7, 8a, 9, 10, 13-15, 17, and 21) and 10 known analogs (8b, 11, 12, 16, 18-20, and 22-24), along with three known cyclopeptide alkaloids (25-27), were isolated from the roots of Waltheria indica. The structures of the new compounds were elucidated by detailed NMR and circular dichroism with computational support and mass spectrometry data interpretation. Anti-inflammatory potential of isolates was evaluated based on inhibition of lipopolysaccharide (LPS)-induced nitric oxide (NO) production and tumor necrosis factor-alpha (TNF-α)-induced nuclear factor kappa B (NF-κB) activity with cell culture models. In the absence of cell growth inhibition, compounds 6, 8a, 9-11, 13, 21, and 24 reduced TNF-α-induced NF-κB activity with IC50 values ranging from 7.1 to 12.1 μM, comparable to the positive control (BAY 11-7082, IC50 = 9.7 μM). Compounds 6, 8a, 8b, and 11 showed significant NO-inhibitory activity with IC50 values ranging from 11.0 to 12.8 μM, being more active than the positive control (l-NMMA, IC50 = 22.7 μM). Structure-activity relationships indicated that NO inhibitory activity was significantly affected by C-8 substitution. Inhibition of LPS-induced nitric oxide synthase (iNOS) by 8b [(5S)-waltherione M, IC50 11.7 ± 0.8 μM] correlated with inhibition of iNOS mRNA expression. The biological potential of W. indica metabolites supports the traditional use of this plant for the treatment of inflammatory-related disorders.
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Affiliation(s)
- Feifei Liu
- School of Life Sciences, Jiangsu Normal University, Xuzhou, Jiangsu 221116, People's Republic of China
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai'i at Hilo, Hilo, Hawaii 96720, United States
| | - Timothy J O'Donnell
- Department of Chemistry, University of Hawai'i at Manoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Eun-Jung Park
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai'i at Hilo, Hilo, Hawaii 96720, United States
- Arnold and Marine Schwartz College of Pharmacy and Health Sciences, Long Island University, Brooklyn, New York 11201, United States
| | - Sasha Kovacs
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai'i at Hilo, Hilo, Hawaii 96720, United States
| | - Kenzo Nakamura
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai'i at Hilo, Hilo, Hawaii 96720, United States
| | - Asim Dave
- Arnold and Marine Schwartz College of Pharmacy and Health Sciences, Long Island University, Brooklyn, New York 11201, United States
| | - Yuheng Luo
- Department of Chemistry, University of Hawai'i at Manoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Rui Sun
- Department of Chemistry, University of Hawai'i at Manoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Marisa Wall
- Daniel K. Inouye U.S. Pacific Basin Agricultural Research Center, USDA-ARS, Hilo, Hawaii 96720, United States
| | - Supakit Wongwiwatthananukit
- Department of Pharmacy Practice, Daniel K. Inouye College of Pharmacy, University of Hawai'i at Hilo, Hilo, Hawaii 96720, United States
| | | | - Philip G Williams
- Department of Chemistry, University of Hawai'i at Manoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - John M Pezzuto
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai'i at Hilo, Hilo, Hawaii 96720, United States
- College of Pharmacy and Health Sciences, Western New England University, Springfield, Massachusetts 10119, United States
| | - Leng Chee Chang
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai'i at Hilo, Hilo, Hawaii 96720, United States
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9
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Tamer Ö, Şimşek M, Avcı D, Atalay Y. Static/dynamic first and second order hyperpolarizabilities, optimized structures, IR, UV-Vis, 1H and 13C NMR spectra for effective charge transfer compounds: A DFT study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 286:122005. [PMID: 36302281 DOI: 10.1016/j.saa.2022.122005] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/13/2022] [Accepted: 10/14/2022] [Indexed: 06/16/2023]
Abstract
The effective charge transfer compounds, 4-N,N-dimethylamino-4'-N'-methyl-stilbazolium m-trifluoromethylbenzene-sulfonate (DSMFS) and 4-N,N-dimethylamino-4'-N'-methyl-stilbazolium p-trifluoromethylbenzene-sulfonate (DSPFS), were simulated in terms of geometric structure, IR, UV-Vis, 1H NMR and 13C NMR spectra. UV-vis spectra for both molecules give two peaks at 290 and 436 nm assigned as n-π* and π-π* transitions. The HOMO-LUMO energy gap for DSMFS (2.8174 eV) was calculated as lower than that of DSPFS (4.6649 eV). The detailed frontier molecular orbital analysis also indicated that the intra- and inter-molecular charge transfers occur in DSMFS and DSPFS. The static and dynamic (ω = 532 and 1064 nm) nonlinear optical properties were also investigated by using B3LYP/6-311++G(d,p) level. Static first and second order hyperpolarizabilities (β and γ) of DSMFS were obtained 1.5726 × 10-28 esu and 271.63 × 10-36 esu, and those for DSPFS were obtained as 1.5528 × 10-28 esu and 303.31 × 10-36 esu. The dynamic β and γ were obtained as higher than the static corresponding parameters. However, the increasing wavelength in dynamic NLO calculations led to a decrease in β and γ parameters.
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Affiliation(s)
- Ömer Tamer
- Sakarya University, Faculty of Science, Department of Physics, Sakarya 54050, Turkey.
| | - Merve Şimşek
- Sakarya University, Faculty of Science, Department of Physics, Sakarya 54050, Turkey
| | - Davut Avcı
- Sakarya University, Faculty of Science, Department of Physics, Sakarya 54050, Turkey
| | - Yusuf Atalay
- Sakarya University, Faculty of Science, Department of Physics, Sakarya 54050, Turkey
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10
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Ningthoujam A, Shimray SA, Singh KDK, Chipem FA. A Theoretical Exploration of Different π-π Stacking Dimers of Coronenes and its Substituted Analogues. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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11
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Ermakova EA, Ivanova AV, Kurbanov RK, Shurpik DN, Stoikov II, Zuev YF, Khairutdinov BI. Stereochemical inversion of pillar[5]arene. NMR and DFT studies. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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12
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Liu F, Mallick S, O’Donnell TJ, Rouzimaimaiti R, Luo Y, Sun R, Wall M, Wongwiwatthananukit S, Date A, Silva DK, Williams PG, Chang LC. Coumarinolignans with Reactive Oxygen Species (ROS) and NF-κB Inhibitory Activities from the Roots of Waltheria indica. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27103270. [PMID: 35630746 PMCID: PMC9147481 DOI: 10.3390/molecules27103270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 05/15/2022] [Accepted: 05/16/2022] [Indexed: 11/29/2022]
Abstract
Seven new coumarinolignans, walthindicins A–F (1a, 1b, 2–5, 7), along with five known analogs (6, 8–11), were isolated from the roots of Waltheria indica. The structures of the new compounds are determined by detailed nuclear magnetic resonance (NMR), circular dichroism (CD) with extensive computational support, and mass spectroscopic data interpretation. Compounds were tested for their antioxidant activity in Human Cervical Cancer cells (HeLa cells). Compounds 1a and 6 showed higher reactive oxygen species (ROS) inhibitory activity at 20 μg/mL when compared with other natural compound-based antioxidants such as ascorbic acid. Considering the role of ROS in nuclear-factor kappa B (NF-κB) activation, compounds 1a and 6 were evaluated for NF-κB inhibitory activity and showed a concentration-dependent inhibition in Human Embryonic Kidney 293 cells (Luc-HEK-293).
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Affiliation(s)
- Feifei Liu
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai‘i at Hilo, Hilo, HI 96720, USA; (F.L.); (S.M.); (R.R.); (A.D.)
- School of Life Sciences, Jiangsu Normal University, Xuzhou 221116, China
| | - Sudipta Mallick
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai‘i at Hilo, Hilo, HI 96720, USA; (F.L.); (S.M.); (R.R.); (A.D.)
| | - Timothy J. O’Donnell
- Department of Chemistry, 2545 McCarthy Mall, University of Hawai‘i at Manoa, Honolulu, HI 96822, USA; (T.J.O.); (Y.L.); (R.S.); (P.G.W.)
| | - Ruxianguli Rouzimaimaiti
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai‘i at Hilo, Hilo, HI 96720, USA; (F.L.); (S.M.); (R.R.); (A.D.)
| | - Yuheng Luo
- Department of Chemistry, 2545 McCarthy Mall, University of Hawai‘i at Manoa, Honolulu, HI 96822, USA; (T.J.O.); (Y.L.); (R.S.); (P.G.W.)
| | - Rui Sun
- Department of Chemistry, 2545 McCarthy Mall, University of Hawai‘i at Manoa, Honolulu, HI 96822, USA; (T.J.O.); (Y.L.); (R.S.); (P.G.W.)
| | - Marisa Wall
- Daniel K. Inouye U.S. Pacific Basin Agricultural Research Center, USDA-ARS, Hilo, HI 96720, USA;
| | - Supakit Wongwiwatthananukit
- Department of Pharmacy Practice, Daniel K. Inouye College of Pharmacy, University of Hawai‘i at Hilo, Hilo, HI 96720, USA;
| | - Abhijit Date
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai‘i at Hilo, Hilo, HI 96720, USA; (F.L.); (S.M.); (R.R.); (A.D.)
- Department of Pharmacology and Toxicology, R. K. Coit College of Pharmacy, University of Arizona, Tucson, AZ 85715, USA
| | | | - Philip G. Williams
- Department of Chemistry, 2545 McCarthy Mall, University of Hawai‘i at Manoa, Honolulu, HI 96822, USA; (T.J.O.); (Y.L.); (R.S.); (P.G.W.)
| | - Leng Chee Chang
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai‘i at Hilo, Hilo, HI 96720, USA; (F.L.); (S.M.); (R.R.); (A.D.)
- Correspondence: ; Tel.: +1-(808)-981-8018
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13
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Francese T, Kundu A, Gygi F, Galli G. Quantum simulations of thermally activated delayed fluorescence in an all-organic emitter. Phys Chem Chem Phys 2022; 24:10101-10113. [PMID: 35416814 DOI: 10.1039/d2cp01147f] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We investigate the prototypical NAI-DMAC thermally activated delayed fluorescence (TADF) emitter in the gas phase- and high-packing fraction limits at finite temperature, by combining first principles molecular dynamics with a quantum thermostat to account for nuclear quantum effects (NQE). We find a weak dependence of the singlet-triplet energy gap (ΔEST) on temperature in both the solid and the molecule, and a substantial effect of packing. While the ΔEST vanishes in the perfect crystal, it is of the order of ∼0.3 eV in the molecule, with fluctuations ranging from 0.1 to 0.4 eV at 300 K. The transition probability between the HOMOs and LUMOs has a stronger dependence on temperature than the singlet-triplet gap, with a desirable effect for thermally activated fluorescence; such temperature effect is weaker in the condensed phase than in the molecule. Our results on ΔEST and oscillator strengths, together with our estimates of direct and reverse intersystem crossing rates, show that optimization of packing and geometrical conformation is critical to increase the efficiency of TADF compounds. Our findings highlight the importance of considering thermal fluctuations and NQE to obtain robust predictions of the electronic properties of NAI-DMAC.
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Affiliation(s)
- Tommaso Francese
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL 60637, USA.
| | - Arpan Kundu
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL 60637, USA.
| | - Francois Gygi
- Department of Computer Science, University of California, Davis, CA 95616, USA
| | - Giulia Galli
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL 60637, USA. .,Materials Science Division and Center for Molecular Engineering, Argonne National Laboratory, Lemont, IL 60439, USA.,Department of Chemistry, University of Chicago, Chicago, IL 60637, USA
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14
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A theoretical and experimental analysis of the luminescent properties of Europium(III) complex sensitized by tryptophan. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.113875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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15
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O'Donnell TJ, Luo Y, Yoshida WY, Suzuki S, Sun R, Williams PG. Spirovetivane- and Eudesmane-Type Sesquiterpenoids Isolated from the Culture Media of Two Cyanobacterial Strains. JOURNAL OF NATURAL PRODUCTS 2022; 85:415-425. [PMID: 35142496 DOI: 10.1021/acs.jnatprod.1c01014] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
As part of a study examining polar metabolites produced by cyanobacterial strains, we examined media extracts of a Calothrix sp. (strain R-3-1) and a Scytonema sp. (strain U-3-3). The cell mass of each was separated from the media, and HP20 resin was added for adsorption of secreted metabolites, a relatively unexplored area of cyanobacterial chemistry. HPLC-UV-LCMS-guided isolation led to the discovery of seven sesquiterpenoid compounds with five new, one known, and one previously isolated as the methyl ester. Through a complement of 1D and 2D NMR spectroscopic techniques, the planar structures and relative configurations of the seven compounds were elucidated. Spironostoic acid (1), 11,12-didehydrospironostoic acid (2), and 12-hydroxy-2-oxo-11-epi-hinesol (4) are spirovetivane-type compounds from R-3-1, while stigolone (5), 11R,12-dihydroxystigolone (6), and 11S,12-dihydroxystigolone (7) are three eudesmane-type compounds from U-3-3. Circular dichroism was utilized to decipher the absolute configurations of new compounds 1, 2, 4, 5, 6, and 7. Due to the structural variety observed among the spirovetivane- and eudesmane-type compounds in the literature and often a lack of clarity in how determinations were made, computational spectra and model compounds were used to support the interpretation of ECD and NMR spectra. A straightforward process to determine the configuration of these systems is presented.
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Affiliation(s)
- Timothy J O'Donnell
- Department of Chemistry, University of Hawai'i at Manoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Yuheng Luo
- Department of Chemistry, University of Hawai'i at Manoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Wesley Y Yoshida
- Department of Chemistry, University of Hawai'i at Manoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Sayuri Suzuki
- Center for Biomedical Research, The Queen's Medical Center, Honolulu, Hawaii 96813, United States
| | - Rui Sun
- Department of Chemistry, University of Hawai'i at Manoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Philip G Williams
- Department of Chemistry, University of Hawai'i at Manoa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
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16
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Orasugh JT, Ray SS. Prospect of DFT Utilization in Polymer-Graphene Composites for Electromagnetic Interference Shielding Application: A Review. Polymers (Basel) 2022; 14:polym14040704. [PMID: 35215617 PMCID: PMC8880781 DOI: 10.3390/polym14040704] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 01/02/2022] [Accepted: 01/10/2022] [Indexed: 01/27/2023] Open
Abstract
The improvement in current materials science has prompted a developing need to capture the peculiarities that determine the properties of materials and how they are processed on an atomistic level. Quantum mechanics laws control the interface among atoms and electrons; thus, exact and proficient techniques for fixing the major quantum-mechanical conditions for complex many-particle, many-electron frameworks should be created. Density functional theory (DFT) marks an unequivocal advance in these endeavours. DFT has had a rapid influence on quintessential and industrial research during the last decade. The DFT system describes periodic structural systems of 2D or 3D electronics with the utilization of Bloch’s theorem in the direction of Kohn–Sham wavefunctions for the significant facilitation of these schemes. This article introduces and discusses the infinite systems modelling approach required for graphene-based polymer composites or their hybrids. Aiming to understand electronic structure computations as per physics, the impressions of band structures and atomic structure envisioned along with orbital predicted density states are beneficial. Convergence facets coupled with the basic functions number and the k-points number are necessary to explain for every physicochemical characteristic in these materials. Proper utilization of DFT in graphene-based polymer composites for materials in EMI SE presents the potential of taking this niche to unprecedented heights within the next decades. The application of this system in graphene-based composites by researchers, along with their performance, is reviewed.
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Affiliation(s)
- Jonathan Tersur Orasugh
- Department of Chemical Sciences, University of Johannesburg, Doorfontein, Johannesburg 2028, South Africa;
- Centre for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology Innovation Centre, Council for Scientific and Industrial Research, Pretoria 0001, South Africa
| | - Suprakash Sinha Ray
- Department of Chemical Sciences, University of Johannesburg, Doorfontein, Johannesburg 2028, South Africa;
- Centre for Nanostructures and Advanced Materials, DSI-CSIR Nanotechnology Innovation Centre, Council for Scientific and Industrial Research, Pretoria 0001, South Africa
- Correspondence: ; Tel.: +27-12-841-2388
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17
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Tamoxifen charge transfer complexes with 2, 3-dichloro-5, 6-dicyano-1, 4-benzoquinone and 7, 7, 8, 8-tetracyanoquinodimethan: Synthesis, spectroscopic characterization and theoretical study. Bioorg Chem 2022; 120:105603. [DOI: 10.1016/j.bioorg.2022.105603] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 12/30/2021] [Accepted: 01/05/2022] [Indexed: 11/21/2022]
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18
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Fan L, Wang J, Huang Y, Su L, Li C, Zhao YH, Martyniuk CJ. Comparative analysis on the photolysis kinetics of four neonicotinoid pesticides and their photo-induced toxicity to Vibrio Fischeri: Pathway and toxic mechanism. CHEMOSPHERE 2022; 287:132303. [PMID: 34562705 DOI: 10.1016/j.chemosphere.2021.132303] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 09/13/2021] [Accepted: 09/18/2021] [Indexed: 06/13/2023]
Abstract
Neonicotinoids are widely used pesticides all over the world and pose severe water pollution. Although they can be degraded via absorbing sunlight, few attentions have been paid to the environmental risks of their photolysis products. In this paper, the photo-toxicity was investigated for four neonicotinoids (dinotefuran, nitenpyram, thiamethoxam and clothianidin) based on a series of experiments (i.e., photolysis kinetics, radical scavenging, bioluminescent inhibition test to Vibrio Fischeri and intermediate identification) and in-silico calculation of photolysis pathway. The results show that direct photolysis dominates the photolysis of the four neonicotinoids under simulated sunlight radiation. The bioluminescent inhibition kinetics shows that all four neonicotinoids have photo-induced toxicity to V. fischeri, but with different light-induced responses. Scavenging radicals (·OH and 1O2) will decrease the photo-induced toxicity of all the four neonicotinoids, indicating radicals play important roles to the photo-chemical reactions of intermediates. Dissolved organic matters exhibit slightly shading effect to the photolysis rates of four parent compounds. However, the ROSs generated by DOM can accelerate the photo-chemical reactions of intermediates, leading to different photo-induced toxicity in present of DOM. According to the detected intermediates and Gaussian calculations, there are different photolysis pathways and mechanisms for the four neonicotinoids. The calculation for photo-sensitization reactions with 3O2 indicates that both energy transfer reactions and electron transfer reactions can be produced under simulated sunlight radiation, which further consolidate that reactive oxygen species are involved in the photolysis process. A theoretical model has been developed to explain the toxicity variations of four neonicotinoids in different aqueous conditions.
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Affiliation(s)
- Lingyun Fan
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, 130117, PR China
| | - Jia Wang
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, 130117, PR China
| | - Ying Huang
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, 130117, PR China
| | - Limin Su
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, 130117, PR China
| | - Chao Li
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, 130117, PR China
| | - Yuan Hui Zhao
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, School of Environment, Northeast Normal University, Changchun, 130117, PR China.
| | - Christopher J Martyniuk
- Center for Environmental and Human Toxicology, Department of Physiological Sciences, College of Veterinary Medicine, UF Genetics Institute, Interdisciplinary Program in Biomedical Sciences Neuroscience, University of Florida, Gainesville, FL, 32611, USA
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19
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Zhang C, Chen G, Si Y, Liu M. Surface modeling of photocatalytic materials for water splitting. Phys Chem Chem Phys 2021; 24:1237-1261. [PMID: 34935801 DOI: 10.1039/d1cp04352h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The photocatalyst surface is central to photocatalytic reactions. However, it has been a challenge to explicitly understand both the surface configuration and the structure-dependent photocatalytic properties at the atomic level. First-principles density functional theory (DFT) calculations provide a versatile method that makes up for the lack of experimental surface studies. In DFT calculations, the initial surface model greatly affects the accuracy of the calculation results. Consequently, establishing a more realistic and more reliable material surface models is undoubtedly the first step and the most important link in theoretical calculations. The aim of this Perspective is to provide a general understanding of the methods for the surface modeling of photocatalytic materials in recent years. We begin with a discussion of the basic theories applied in photocatalytic surface research, followed by an explanation of the importance of surface modeling in photocatalysis. We then elaborate on the advantages and disadvantages of the basic surface model and briefly describe the latest surface modeling methods. Finally, we evaluate the rationality of current surface modeling methods. We summarize this Perspective by prospecting the developing directions of photocatalytic surface research in the future. It is believed that a reasonable surface model should be verified by both experimental characterization and theoretical computation with negative feedback.
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Affiliation(s)
- Chunyang Zhang
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P. R. China.
| | - Guijun Chen
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P. R. China.
| | - Yitao Si
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P. R. China.
| | - Maochang Liu
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, P. R. China. .,Suzhou Academy of Xi'an Jiaotong University, Suzhou, Jiangsu 215123, P. R. China
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20
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Manonmani G, Sandhiya L, Senthilkumar K. Mechanism, Kinetics, and Ecotoxicity Assessment of ·OH-Initiated Oxidation Reactions of Sulfoxaflor. J Phys Chem A 2021; 125:10052-10064. [PMID: 34755512 DOI: 10.1021/acs.jpca.1c05030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The ·OH-initiated reaction mechanism and kinetics of sulfoxaflor were investigated by using electronic structure calculations. The possible hydrogen atom and cyano group abstraction reaction pathways were studied, and the calculated thermochemical parameters show that the hydrogen atom abstraction from the C7 carbon atom is the more favorable reaction pathway. The subsequent reactions for the favorable intermediate (I4) with other atmospheric reactive species, such as O2, H2O, HO2·, and NOx· (x = 1, 2), were studied in detail. The products identified from the subsequent reactions could contribute to secondary organic aerosol (SOA) formation in the atmosphere. The intermediates and products formed from the initial and subsequent reactions are equally as toxic as the parent sulfoxaflor. At 298 K, the rate constant calculated for the formation of the favorable intermediate I4 is 2.54 × 10-12 cm3 molecule-1 s-1, which shows that the lifetime of sulfoxaflor is 54 h. The excited-state calculation performed through time-dependent density functional theory shows that the photolysis of the title molecule is unlikely in the atmosphere. The global warming potentials (GWPs) for different time horizons, photochemical ozone creation potential (POCP), and ecotoxicity analysis were also studied for the insecticide sulfoxaflor.
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Affiliation(s)
- G Manonmani
- Department of Physics, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India
| | - L Sandhiya
- Council of Scientific and Industrial Research-National Institute of Science, Technology and Development Studies, New Delhi 110012, India
| | - K Senthilkumar
- Department of Physics, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India
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21
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Kumar P, Escudero D. Computational Protocol to Calculate the Phosphorescence Energy of Pt(II) Complexes: Is the Lowest Triplet Excited State Always Involved in Emission? A Comprehensive Benchmark Study. Inorg Chem 2021; 60:17230-17240. [PMID: 34702026 DOI: 10.1021/acs.inorgchem.1c02562] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The reliable calculation of phosphorescence energies of phosphor materials is at the core of designing efficient phosphorescent organic light-emitting diodes (PhOLEDs). Therefore, it is of paramount importance to have a robust computational protocol to perform those calculations in a black-box manner. In this work, we use Domain-Based Local Pair Natural Orbital Coupled Cluster theory with single, double, and perturbative triple excitation (DLPNO-CCSD(T)) calculations to attain the phosphorescence energies of a large pool of Pt(II) complexes. Several approaches to incorporate relativistic effects in our calculations were tested. In addition, we have used the DLPNO-CCSD(T) values (i.e., our best theoretical values) to assess the performance of different flavors of density functional theory including pure, hybrid, meta-hybrid, and range-separated functionals. Among the tested functionals, the M06HF functional provides the best values compared with the DLPNO-CCSD(T) ones, with a mean absolute deviation (MAD) value of 0.14 eV. In its turn, and thanks to the increased accuracy achieved in the calculation of phosphorescence energies, we also demonstrate that not all of the investigated complexes emit from their lowest-lying triplet state (T1). The outlier complexes include different complex photophysical scenarios and both Kasha and anti-Kasha types of complexes. Finally, we provide a general computational protocol to pre-screen whether T1 is actually the emissive state and to accurately calculate the phosphorescence energies of Pt(II) complexes.
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Affiliation(s)
- Prashant Kumar
- Quantum Chemistry and Physical Chemistry Section, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Daniel Escudero
- Quantum Chemistry and Physical Chemistry Section, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
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22
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23
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Hurley JM, Meisner QJ, Huang C, Zhu L. Hydroxyaromatic Fluorophores. ACS OMEGA 2021; 6:3447-3462. [PMID: 33585731 PMCID: PMC7876677 DOI: 10.1021/acsomega.0c04611] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Accepted: 01/15/2021] [Indexed: 06/12/2023]
Abstract
Many fluorophores that are widely used in analytical biochemistry and in biological microscopy contain a hydroxyaromatic component. One could also find fascinating chemistries of hydroxyaromatic dyes, especially those capable of excited state proton transfer (ESPT) to produce dual emission, in the literature of materials and physical chemistry. The ESPT-capable compounds have attracted interest based on their fundamental intellectual values in molecular photophysics and their potential utilities as light emitters in organic light-emitting diodes (LEDs) or fluorescent sensors. The hydroxyaromatic dyes could undergo either intra- or intermolecular proton transfer in either electronic ground or excited states. Although having long been applied for various purposes, some of their absorption and emission properties have not always been clearly described because of the insufficient attention given to proton transfer equilibria in either the ground or excited state and the challenges in computationally modeling the true emitters of these dyes under any given conditions. In this article, an attempt is made to summarize the spectroscopic properties of a few common hydroxyaromatic dyes that have been studied for both fundamental and practical purposes, with the help from quantum chemical calculations of the absorption and emission energies of these dyes in neutral and anion forms. The goal of this article is to provide readers some clarity in the optical properties of these compounds and the tools to understand and to predict the photon-initiated behaviors of hydroxyaromatic fluorophores.
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Affiliation(s)
- Joseph
J. M. Hurley
- Department
of Chemistry and Biochemistry, Florida State
University, 95 Chieftan Way, Tallahassee, Florida 32306-4390, United States
| | - Quinton J. Meisner
- Department
of Chemistry and Biochemistry, Florida State
University, 95 Chieftan Way, Tallahassee, Florida 32306-4390, United States
| | - Chen Huang
- Department
of Scientific Computing, Materials Science and Engineering Program,
National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32306, United States
| | - Lei Zhu
- Department
of Chemistry and Biochemistry, Florida State
University, 95 Chieftan Way, Tallahassee, Florida 32306-4390, United States
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Pang X, Zhou X, Lin X, Yang B, Tian X, Wang J, Xu S, Liu Y. Structurally various sorbicillinoids from the deep-sea sediment derived fungus Penicillium sp. SCSIO06871. Bioorg Chem 2020; 107:104600. [PMID: 33453645 DOI: 10.1016/j.bioorg.2020.104600] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 11/24/2020] [Accepted: 12/24/2020] [Indexed: 10/22/2022]
Abstract
Two new hybrid sorbicillinoids (1 and 5), three new bisorbicillinoids (2-4), and three monomeric sorbicillinoids (6-8), along with eighteen known sorbicillinoids (9-26) were isolated from cultures of the deep-sea sediment derived fungus Penicillium sp. SCSIO06871. Their structures and absolute configurations were elucidated based upon the extensive spectroscopic analysis, X-ray crystallography analysis and the comparison of the experimental and calculated ECD data. Bisorbicillpyrone A (4) is the first example of bisorbicillinoid containing an α-pyrone derivative unit. All of the isolated compounds were evaluated for their antibacterial, antifungal and enzyme inhibitory activities against α-glycosidase and acetylcholinesterase (AChE) in vitro. Compound 6 displayed more potent inhibitory activity against α-glycosidase than acarbose with IC50 value of 36.0 μM and compounds 4, 12, 18, 22, 23 exhibited moderate inhibitory activity with IC50 values ranging from 115.8 to 208.5 μM. Compounds 10 and 22 showed weak enzyme inhibitory activities against AChE with 55.1% and 51.1% inhibitions at concentration of 50 μg/mL, respectively. Besides, compounds 11 and 12 exhibited significant antibacterial activities against Staphylococcus aureus with MIC values of 10.0 and 5.0 μg/mL, respectively. The hypothetical biosynthetic pathway of the isolated sorbicillinoids with three different structural types was discussed.
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Affiliation(s)
- Xiaoyan Pang
- College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, China; CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Xuefeng Zhou
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
| | - Xiuping Lin
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
| | - Bin Yang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
| | - Xinpeng Tian
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
| | - Junfeng Wang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China.
| | - Shihai Xu
- College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, China.
| | - Yonghong Liu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China.
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25
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Balakina MY, Shalin NI, Sharipova AV, Fominykh OD. The effect of cyano-containing acceptor moieties on the photoisomerisation mechanisms and UV/vis spectra of azochromophores with switchable nonlinear optical activity. Mol Phys 2020. [DOI: 10.1080/00268976.2020.1800851] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Marina Yu. Balakina
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Kazan, Russian Federation
- Kazan Federal University, Alexander Butlerov Institute of Chemistry, Kazan, Russian Federation
| | - Nikita I. Shalin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Kazan, Russian Federation
- Kazan Federal University, Alexander Butlerov Institute of Chemistry, Kazan, Russian Federation
| | - Anastasiya V. Sharipova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Kazan, Russian Federation
| | - Olga D. Fominykh
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Kazan, Russian Federation
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26
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Mizuno H, Oosterbaan KJ, Menzl G, Smith J, Rizzuto AM, Geissler PL, Head-Gordon M, Saykally RJ. Revisiting the π → π* transition of the nitrite ion at the air/water interface: A combined experimental and theoretical study. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137516] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Del Galdo S, Fusè M, Barone V. The ONIOM/PMM Model for Effective Yet Accurate Simulation of Optical and Chiroptical Spectra in Solution: Camphorquinone in Methanol as a Case Study. J Chem Theory Comput 2020; 16:3294-3306. [PMID: 32250614 PMCID: PMC7222099 DOI: 10.1021/acs.jctc.0c00124] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
![]()
This paper deals
with the development and first validation of a
composite approach for the simulation of chiroptical spectra in solution
aimed to strongly reduce the number of full QM computations without
any significant accuracy loss. The approach starts from the quantum
mechanical computation of reference spectra including vibrational
averaging effects and taking average solvent effects into account
by means of the polarizable continuum model. Next, the snapshots of
classical molecular dynamics computations are clusterized and one
reference configuration from each cluster is used to compute a reference
spectrum. Local fluctuation effects within each cluster are then taken
into account by means of the perturbed matrix model. The performance
of the proposed approach is tested on the challenging case of the
optical and chiroptical spectra
of camphorquinone in methanol solution. Although further validations
are surely needed, the results of this first study are quite promising
also taking into account that agreement with experimental data is
reached by just a couple of full quantum mechanical geometry optimizations
and frequency computations.
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Affiliation(s)
- Sara Del Galdo
- Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy
| | - Marco Fusè
- Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy
| | - Vincenzo Barone
- Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy
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Zhang J, Li B, Qin Y, Karthik L, Zhu G, Hou C, Jiang L, Liu M, Ye X, Liu M, Hsiang T, Dai H, Zhang L, Liu X. A new abyssomicin polyketide with anti-influenza A virus activity from a marine-derived Verrucosispora sp. MS100137. Appl Microbiol Biotechnol 2020; 104:1533-1543. [PMID: 31894364 DOI: 10.1007/s00253-019-10217-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 10/16/2019] [Accepted: 10/22/2019] [Indexed: 12/29/2022]
Abstract
Marine microorganisms live in dramatically different environments and have attracted much attention for their structurally unique natural products with potential strong biological activity. Based on the one strain-many compounds (OSMAC) strategy and liquid chromatography mass spectrometry (LC-MS) methods, our continuing efforts on the investigation of novel active compounds from marine Verrucosispora sp. MS100137 has led to the identification of a new polycyclic metabolite, abyssomicin Y (1), together with six known abyssomicin and proximicin analogs (2-7). Abyssomicin Y is a type I abyssomicin with an epoxide group at C-8 and C-9. Compounds 1-3 showed potent inhibitory effects against the influenza A virus; their observed inhibition rates were 97.9%, 98.3%, and 95.9%, respectively, at a concentration of 10 μM, and they displayed lower cytotoxicity than 4. The structures were determined by different NMR techniques and HRMS experiments. This investigation revealed that OSMAC could serve as a useful method for enabling the activation of the silent genes in the microorganism and for the formation of previously unreported active secondary metabolites.
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Affiliation(s)
- Jingyu Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Bixiao Li
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China.,Institute of Physical Science and Information Technology, Anhui University, Hefei, 230601, Anhui Province, China.,Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Yujie Qin
- Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Loganathan Karthik
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China.,Sri Shakthi Institute of Engineering and Technology (Autonomous), Coimbatore, Tamil Nadu, India
| | - Guoliang Zhu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Chengjian Hou
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Lan Jiang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China
| | - Miaomiao Liu
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, QLD, 4111, Australia
| | - Xin Ye
- Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Mei Liu
- Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Tom Hsiang
- School of Environmental Sciences, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
| | - Huanqin Dai
- Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Lixin Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China.
| | - Xueting Liu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China.
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Gauriot N, Véniard V, Luppi E. Long-range corrected exchange-correlation kernels to describe excitons in second-harmonic generation. J Chem Phys 2019; 151:234111. [PMID: 31864278 DOI: 10.1063/1.5126501] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We investigate the role of excitons in second-harmonic generation (SHG) through the long-range corrected (LRC) exchange-correlation kernels: empirical LRC, Bootstrap, and jellium-with-a-gap model. We calculate the macroscopic second-order frequency-dependent susceptibility χ(2). We also present the frequency-dependent macroscopic dielectric function ϵM which is a fundamental quantity in the theoretical derivation of χ(2). We assess the role of the long-range kernels in describing excitons in materials with different symmetry types: cubic zincblende, hexagonal wurtzite, and tetragonal symmetry. Our studies indicate that excitons play an important role in χ(2) bringing a strong enhancement of the SHG signal. Moreover, we found that the SHG enhancement follows a simple trend determined by the magnitude of the long-range corrected α-parameter. This trend is material dependent.
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Affiliation(s)
- Nicolas Gauriot
- Laboratoire de Chimie Théorique, Sorbonne Université and CNRS, F-75005 Paris, France
| | - Valérie Véniard
- Laboratoire des Solides Irradiés, CNRS, CEA/DRF/IRAMIS, Ecole polytechnique, Institut Polytechnique de Paris, Route de Saclay, F-91128 Palaiseau and European Theoretical Spectroscopy Facility (ETSF), Paris, France
| | - Eleonora Luppi
- Laboratoire de Chimie Théorique, Sorbonne Université and CNRS, F-75005 Paris, France
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32
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Holtomo O, Motapon O, Nsangou M. DFT Study of Photochemical Properties and Radiative Forcing Efficiency Features of the Stereoisomers cis- and trans-CHCl═CH-CF 3. J Phys Chem A 2019; 123:10437-10445. [PMID: 31697499 DOI: 10.1021/acs.jpca.9b08089] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The accurate assessment of radiative forcing efficiency (RFE) of a greenhouse gas is based on the precise knowledge of its structure and infrared absorption spectrum. The present work investigates the UV-vis absorption spectra and IR absorption spectra that are used for the determination of RFE of the short-lived compounds, cis- and trans-CHCl═CHCF3 (CTFP). These investigations were carried out with six different density functional theory (DFT) methods B3LYP, CAM-B3LYP, M06, M06-2X, TPSS0, and ωB97X-D associated to the basis set 6-31G(3df). Therefrom, the relative populations of the two states cis and trans for temperatures over the range 220-370 K at 1 atm and along the atmospheric altitude were assessed. It turns out that trans-CTFP is the abundant component between the two states. This review reveals that B3LYP and M06 reproduce well the experimental results of UV-vis spectra of trans-CTFP. As for cis-CTFP, EOM-CCSD is not well fitted by DFT methods. The cis- to trans-CTFP isomerization leads to the red shift for DFT methods and to the blue shift in regard to EOM-CCSD and experimental results. The IR absorption spectra are well fitted by B3LYP over the range 500-1600 cm-1 and TPSS0 over 1300-2000 cm-1 for both stereoisomers. Moreover, the root-mean-square errors (RMSEs) of frequencies from experimental data are lower for B3LYP and TPSS0 for both systems. The computed IR absorption band strengths over 500-2000 cm-1 for cis- and over 600-1800 cm-1 for trans-CTFP are consistent with the experiment. The relevant descriptor RFEs of the climate effect were calculated using a narrow band model for a constant vertical profile and then corrected with a lifetime factor for different computational methods. The computed values correlate well with the experimental results for both stereoisomers except M06-2X and TPSS0. It is worth noting that, for both systems, the intense radiative forcing spectra are located at frequencies ranging in 1000-1200 cm-1. The lower forcings of trans-CTFP lying in the atmospheric window region 800-1000 cm-1 are greater than those of cis-CTFP. Therefore, RFE(trans-CTFP) = 1.127 RFE(cis-CTFP).
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Affiliation(s)
- Olivier Holtomo
- Department of Physics, Faculty of Science , University of Bamenda , P.O. Box 39, Bambili , Cameroon.,Department of Physics, Faculty of Science , University of Maroua , P.O. Box 814, Maroua , Cameroon
| | - Ousmanou Motapon
- Department of Physics, Faculty of Science , University of Maroua , P.O. Box 814, Maroua , Cameroon
| | - Mama Nsangou
- Department of Physics, Higher Teachers Training College , University of Maroua , P.O. Box 46, Maroua , Cameroon
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Wang P, Chen X, Wang H, Huang S, Cai C, Yuan J, Zhu G, Xu X, Mei W, Dai H. Four New Picrotoxane-Type Sesquiterpenes From Dendrobium nobile Lindl. Front Chem 2019; 7:812. [PMID: 31850306 PMCID: PMC6895213 DOI: 10.3389/fchem.2019.00812] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 11/11/2019] [Indexed: 11/13/2022] Open
Abstract
Four picrotoxane-type sesquiterpenes, dendroterpene A–D (1–4), together with four known compounds (5–8), were isolated from the stems of Dendrobium nobile Lindl. Their structures were elucidated by spectroscopic analysis, X-ray diffraction analysis, analysis of the ECD data according to the Klyne's lactone sector rule, and quantum ECD calculation. Compounds 1 and 2 are two new picrotoxane-type sesquiterpenes with a new carbon skeleton containing a formamide group, which may be derived from the previously reported dendrobiumane B skeleton by the C(9)-C(11) carbon bond cleavage. Compounds 3, 5, 6, and 8 exhibited inhibitory activity against α-glycosidase. Compounds 5 and 6 were cytotoxic against SGC-7901, K562, A549, BEL-7402, and Hela cell lines.
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Affiliation(s)
- Pei Wang
- Hainan Key Laboratory of Research and Development of Natural Product From Li Folk Medicine, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Xin Chen
- Hainan Key Laboratory of Research and Development of Natural Product From Li Folk Medicine, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China.,Nanjing Agricultural University, Nanjing, China
| | - Hao Wang
- Hainan Key Laboratory of Research and Development of Natural Product From Li Folk Medicine, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Shengzhuo Huang
- Hainan Key Laboratory of Research and Development of Natural Product From Li Folk Medicine, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Caihong Cai
- Hainan Key Laboratory of Research and Development of Natural Product From Li Folk Medicine, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Jingzhe Yuan
- Hainan Key Laboratory of Research and Development of Natural Product From Li Folk Medicine, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Guoliang Zhu
- East China University of Science and Technology, Shanghai, China
| | - Xinglian Xu
- Nanjing Agricultural University, Nanjing, China
| | - Wenli Mei
- Hainan Key Laboratory of Research and Development of Natural Product From Li Folk Medicine, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
| | - Haofu Dai
- Hainan Key Laboratory of Research and Development of Natural Product From Li Folk Medicine, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, China
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Patkowski K. Recent developments in symmetry‐adapted perturbation theory. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2019. [DOI: 10.1002/wcms.1452] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Konrad Patkowski
- Department of Chemistry and Biochemistry Auburn University Auburn Alabama
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35
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Parrish SM, Neupane RP, Harper MK, Head J, Williams PG. Myrmenaphthol A, Isolated from a Hawaiian Sponge of the Genus Myrmekioderma. JOURNAL OF NATURAL PRODUCTS 2019; 82:2668-2671. [PMID: 31461285 PMCID: PMC6919962 DOI: 10.1021/acs.jnatprod.9b00665] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Four compounds (1-4) were isolated from a Hawaiian sponge of the genus Myrmekioderma. Myrmenaphthol A (1) incorporates two unusual elements into an oxidized steroidal core: a naphthyl AB-ring system and a hydroxy group at C-2. A comparison of the experimental and predicted electronic circular dichroism (ECD) spectra of 1 assigned an S configuration to the lone stereocenter (ΔESI = 0.75; similarity factor 0.8137). Known compounds, cinanthrenol A (2), 3,4-dihydroxypregna-5,17-diene-10,2-carbolactone (3), and 3,4-dihydroxypregna-5,20-diene-10,2-carbolactone (4), were also isolated. Despite literature reports of competitive inhibition at nanomolar levels for 2, neither 2 nor the structurally related 1 showed any activity against estrogen receptors at the concentrations tested.
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Affiliation(s)
- Stephen M. Parrish
- Department of Chemistry, University of Hawaii at Manoa, Honolulu Hawaii, 96822
| | - Ram P. Neupane
- Department of Chemistry, University of Hawaii at Manoa, Honolulu Hawaii, 96822
| | - Mary Kay Harper
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah, 84112
| | - John Head
- Department of Chemistry, University of Hawaii at Manoa, Honolulu Hawaii, 96822
| | - Philip G. Williams
- Department of Chemistry, University of Hawaii at Manoa, Honolulu Hawaii, 96822
- To whom correspondence should be addressed: Tel. 808-956-5720. Fax: 808-956-5908.
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Manonmani G, Sandhiya L, Senthilkumar K. Mechanism and Kinetics of Diuron Oxidation Initiated by Hydroxyl Radical: Hydrogen and Chlorine Atom Abstraction Reactions. J Phys Chem A 2019; 123:8954-8967. [DOI: 10.1021/acs.jpca.9b04800] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- G. Manonmani
- Department of Physics, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India
| | - L. Sandhiya
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
| | - K. Senthilkumar
- Department of Physics, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India
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Holtomo O, Nsangou M, Fifen JJ, Motapon O. Thermodynamic of solvation, solute - Solvent electron transfer and ionization potential of BSCAPE molecule and its UV-vis spectra in aqueous solution. J Mol Graph Model 2019; 92:100-111. [PMID: 31349123 DOI: 10.1016/j.jmgm.2019.06.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Revised: 05/24/2019] [Accepted: 06/20/2019] [Indexed: 01/19/2023]
Abstract
The molecular system 2-Phenylethyl (2E)-3-(1-benzenesulfonyl-4,5-dihydroxyphenyl) acrylate (BSCAPE) is a phenolic acid that covers a large spectrum of biological properties. The investigations of solvation and oxidation processes of BSCAPE molecule by computational means were the challenge of this present work. Water was required for solvation throughout the work. The explicit H2O were sequentially added to form the complexes BSCAPE(H2O)n=0-11. The discrete - continuum model was at the heart of this work. DFT and TD-DFT both associated to the continuum model SMD were required. Hence, the structures, the solvation energies, the energies of solute - solvent electron transfer (SSET), the ionisation potential (IP), and the UV-vis spectra were studied. It comes out that, the structure of the CAPE part included in BSCAPE agrees well with the available experimental values of CAPE but with a minor influence due to the presence of benzensulfonyl group. The enthalpy and free energy of solvation increase linearly with nH2O. The global reactivity indexes were assessed to appreciate the oxidation of BSCAPE. The latter quality was strongly assessed by the enthalpy and free energy of SSET and IP. The SSET potential increase with nH2O and the size of water clusters. The values 723.16 and 711.62 kJ/mol were found for enthalpy and free energy of IP respectively. Then in aqueous solution, the results fall down and upon addition of nH2O, they approach gas phase value for 11H2O and still are not stabilized. Therefore, the resistance to oxidation starts to raise at this level. Elsewhere, the UV-vis spectra of BSCAPE present four important peaks about 279.3, 234.8, 208.4 and 199.4 nm in gaseous state. The excitation shifts to the red as the number of H2O increase. Their oscillator strengths also increase with solvation.
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Affiliation(s)
- Olivier Holtomo
- Department of Physics, Faculty of Science, University of Bamenda, Bambili, P. O. Box 39, Cameroon; Laboratory of Fundamental Physics, Faculty of Science, University of Douala, Douala, P. O. Box 24157, Cameroon.
| | - Mama Nsangou
- Department of Physics, Higher Teacher's Training College, University of Maroua, Maroua, P. O. Box 46, Cameroon; Department of Physics, Faculty of Science, University of Ngaoundere, Ngaoundere, P. O. Box 454, Cameroon
| | - Jean Jules Fifen
- Department of Physics, Faculty of Science, University of Ngaoundere, Ngaoundere, P. O. Box 454, Cameroon
| | - Ousmanou Motapon
- Laboratory of Fundamental Physics, Faculty of Science, University of Douala, Douala, P. O. Box 24157, Cameroon; Department of Physics, Faculty of Science, University of Maroua, Maroua, P. O. Box 814, Cameroon
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High-resolution tip-enhanced Raman scattering probes sub-molecular density changes. Nat Commun 2019; 10:2567. [PMID: 31189893 PMCID: PMC6561954 DOI: 10.1038/s41467-019-10618-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 05/22/2019] [Indexed: 11/18/2022] Open
Abstract
Tip-enhanced Raman spectroscopy (TERS) exhibits new selection rule and sub-nanometer spatial resolution, which is attributed to the plasmonic near-field confinement. Despite recent advances in simulations of TERS spectra under highly confined fields, a simply physical mechanism has remained elusive. In this work we show that single-molecule TERS images can be explained by local sub-molecular density changes induced by the confined near-field during the Raman process. The local sub-molecular density changes determine the spatial resolution in TERS and the gradient-based selection rule. Using this approach we find that the four-fold symmetry of meso-tetrakis(3,5-di-tert-butylphenyl)porphyrin (H2TBPP) TERS images observed in experiments arises from the combination of degenerate normal modes localized in the functional side groups rather than the porphyrin ring as previously considered. As an illustration of the potential of the method, we demonstrate how this new theory can be applied to microscopic structure characterization. Despite recent advances in simulations of tip-enhanced Raman spectroscopy (TERS) under highly confined fields, a simply physical mechanism has remained elusive. Here, the authors show that single molecule TERS images can be explained by local sub-molecular density changes induced by the confined near-field during the Raman process.
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Ravi PV, Thangadurai DT, Nataraj D, Senthilkumar K, Manonmani G, Kalarikkal N, Thomas S, Govindh P. Graphene Nanobuds: A New Second-Generation Phosgene Sensor with Ultralow Detection Limit in Aqueous Solution. ACS APPLIED MATERIALS & INTERFACES 2019; 11:19339-19349. [PMID: 31050885 DOI: 10.1021/acsami.9b02911] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Selective and sensitive detection of highly toxic chemicals by a suitable, fast, inexpensive, and trustworthy method is vital due to its serious health threats to humankind and breach of public security caused by unexpected terrorist attacks and industrial accidents. Phosgene or carbonyl dichloride is widely employed in many chemical industries and pharmaceuticals, and in pesticide production, which is extremely toxic by severe (short-term) inhalation exposure. Because of the non-existence of a phosgene sensor in aqueous solution and the immense emphasis gained by nanomaterials, especially carbonaceous materials, augmented attention has been given to the development of a fluorophore-functionalized carbon-based method to detect this noxious substance. In this study, surfactant free 1,8-diaminonaphthalene (DAN)-functionalized graphene quantum dots (DAN-GQDs) were prepared to detect phosgene in aqueous solution. The FESEM (field emission scanning electron microscopy) and HRTEM (high-resolution transmission electron microscopy) analyses confirm the as-prepared DAN-GQD morphology as nanobuds (NBs) with an average diameter of ca. 35-40 nm. The crystalline nature, elemental composition, and chemical state of DAN-GQDs were analyzed by standard physiochemical techniques. The edge-termination at the carboxyl functional group of GQDs with DAN was examined by XPS, Raman, FT-IR, and 1H NMR spectroscopy analyses. The aqueous solution of DAN-GQDs (4.89 × 10-9 M) exhibits a strong emission peak at 423 nm upon excitation at 328 nm. The addition of the phosgene molecule (0 → 88 μL) quenches the initial fluorescence intensity of DAN-GQDs (ΦF 53.6 → 34.6%) through the formation of a stable six-membered cyclized product. The DAN-GQDs displayed excellent selectivity and sensitivity for phosgene ( Ka = 3.84 × 102 M-1 and LoD (limit of detection) = 2.26 ppb) over other competing toxic pollutants in water. The time-resolved fluorescence analysis confirms that the quenching of DAN-GQDs follows nonradiative relaxation of excited electrons. Furthermore, bioimaging experiments of phosgene in living human breast cancer (HeLa) cells and cell viability test successfully demonstrated the practicability of DAN-GQDs.
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Affiliation(s)
- Pavithra V Ravi
- Department of Nanoscience and Technology , Sri Ramakrishana Engineering College, Affiliated to Anna University , Coimbatore 641 022 , Tamilnadu , India
| | - Daniel T Thangadurai
- Department of Nanoscience and Technology , Sri Ramakrishana Engineering College, Affiliated to Anna University , Coimbatore 641 022 , Tamilnadu , India
| | - Devaraj Nataraj
- Department of Physics , Bharathiar University , Coimbatore 641 046 , Tamilnadu , India
| | | | - Gunasekaran Manonmani
- Department of Physics , Bharathiar University , Coimbatore 641 046 , Tamilnadu , India
| | - Nandakumar Kalarikkal
- International and Inter University Centre for Nanoscience and Nontechnology , Mahatma Gandhi University , Kottayam 686 650 , Kerala , India
| | - Sabu Thomas
- International and Inter University Centre for Nanoscience and Nontechnology , Mahatma Gandhi University , Kottayam 686 650 , Kerala , India
| | - Praveen Govindh
- International and Inter University Centre for Nanoscience and Nontechnology , Mahatma Gandhi University , Kottayam 686 650 , Kerala , India
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Trabelsi S, Kouki N, Seydou M, Maurel F, Tangour B. Intramolecular Path Determination of Active Electrons on Push-Pull Oligocarbazole Dyes-Sensitized Solar Cells. ChemistryOpen 2019; 8:580-588. [PMID: 31080701 PMCID: PMC6503813 DOI: 10.1002/open.201800224] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 03/25/2019] [Indexed: 11/11/2022] Open
Abstract
Several push‐pull oligocarbazole dye‐sensitizers have been studied using theoretical methods in order to better understand the relationship between structural electronic or optical properties and intramolecular path of active electrons during the ionization and injection processes. DFT/TD‐DFT calculations were performed on a series of five dye sensitizers. They differ by the presence of electron donating group (EDG) by inductive effect (noted+I) or electron releasing group (ERG) by mesomeric effect (noted+M) or electron withdrawing group by inductive effect (noted‐I) on the pushed part of the dyes studied. Our work focused on the internal distribution of electrons in the different parts of dye that are the push/pull moieties and the π‐bridge. The study concerned the ground state, the electronic transition process and the excited state. In each situation, the fragment acting in the ionization or transition phenomena were identified. In the ground state, the electrons of the push part appear to be the least bound because they have the highest probabilities of ionization. In the excited state, the ionized atoms are essentially positioned in the pushing part and some neighboring atoms of the bridge. In the electronic transition, the active atoms are located in the π‐conjugated part but only on the side adjacent to the acceptor group. To arrive to this conclusion, we optimized the structures of the five dyes in their ground and excited states. We calculated the atomic charges, the wavelengths and intensities of electronic transitions in the visible domain, the reorganization energies as well as the oxidation potential. It appears that +M donor ligands improve the performance of a dye because the great distribution of atoms to be ionized in the push parts.
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Affiliation(s)
- Salma Trabelsi
- University of Tunis El Manar Research Unity of Modeling in Fundamental Sciences and Didactics, IPEIEM, BP 254 El Manar 2 2096 Tunis Tunisia
| | - Nouha Kouki
- University of Tunis El Manar Research Unity of Modeling in Fundamental Sciences and Didactics, IPEIEM, BP 254 El Manar 2 2096 Tunis Tunisia
| | - Mahamadou Seydou
- University Paris Diderot Sorbonne Paris Cite, ITODYS. UMR 7086 CNRS 15 rue J. A. de Baïf 75205 Paris Cedex 13 France
| | - François Maurel
- University Paris Diderot Sorbonne Paris Cite, ITODYS. UMR 7086 CNRS 15 rue J. A. de Baïf 75205 Paris Cedex 13 France
| | - Bahoueddine Tangour
- University of Tunis El Manar Research Unity of Modeling in Fundamental Sciences and Didactics, IPEIEM, BP 254 El Manar 2 2096 Tunis Tunisia
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Lakshmanan S, Pratihar S, Hase WL. Direct Dynamics Simulations of the CH2 + O2 Reaction on the Ground- and Excited-State Singlet Surfaces. J Phys Chem A 2019; 123:4360-4369. [DOI: 10.1021/acs.jpca.9b02656] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sandhiya Lakshmanan
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
| | - Subha Pratihar
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
| | - William L. Hase
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
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Del Galdo S, Chandramouli B, Mancini G, Barone V. Assessment of Multi-Scale Approaches for Computing UV–Vis Spectra in Condensed Phases: Toward an Effective yet Reliable Integration of Variational and Perturbative QM/MM Approaches. J Chem Theory Comput 2019; 15:3170-3184. [DOI: 10.1021/acs.jctc.9b00120] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Sara Del Galdo
- Istituto di Chimica dei Composti OrganoMetallici (ICCOMCNR), UOS di Pisa, Area della Ricerca CNR, Consiglio Nazionale delle Ricerche, Via G. Moruzzi 1, I-56124 Pisa, Italy
- Scuola Normale Superiore di Pisa, Piazza dei Cavalieri 7, I-56126 Pisa, Italy
| | - Balasubramanian Chandramouli
- Scuola Normale Superiore di Pisa, Piazza dei Cavalieri 7, I-56126 Pisa, Italy
- Compunet, Istituto Italiano di Tecnologia (IIT), Via Morego 30, I-16163 Genova, Italy
| | - Giordano Mancini
- Scuola Normale Superiore di Pisa, Piazza dei Cavalieri 7, I-56126 Pisa, Italy
- Istituto Nazionale di Fisica Nucleare (INFN) sezione di Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
| | - Vincenzo Barone
- Scuola Normale Superiore di Pisa, Piazza dei Cavalieri 7, I-56126 Pisa, Italy
- Istituto Nazionale di Fisica Nucleare (INFN) sezione di Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy
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43
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Kumari I, Kaur N, Gupta S, Goel N. Nucleotide conjugated (ZnO) 3 cluster: Interaction and optical characteristics using TDDFT. J Mol Graph Model 2018; 87:211-219. [PMID: 30554067 DOI: 10.1016/j.jmgm.2018.12.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 11/06/2018] [Accepted: 12/03/2018] [Indexed: 11/18/2022]
Abstract
Binding of four DNA nucleotide units with (ZnO)3 cluster in an aqueous phase has been investigated using density functional theory (DFT) and time dependent-density functional theory (TDDFT) method and the stability order for (ZnO)3-nucleobases/sugar/phosphate systems is predicted as phosphate > C > A > S > T ∼ G. The order of binding energy for (ZnO)3-nucleotide hybrid systems is observed to be (ZnO)3 + nuc-C ˃ (ZnO)3 + nuc-A ˃ (ZnO)3 + nuc-G ˃ (ZnO)3 + nuc-T. The binding of nucleotide units with the cluster has been explained on the basis of molecular electrostatic potential (MEP) plots, hydrogen bonding, glycosidic torsion angles, density of state (DOS) plots. The photophysical properties of (ZnO)3-nucleotide complexes have been studied using TDDFT approach. Among all (ZnO)3-nucleotide complexes, the absorption spectra of (ZnO)3 + nuc-A and (ZnO)3 + nuc-C complexes are seen to undergo red shift with respect to their bare nucleotide units that would be useful in the optical sensing of the respective nucleotides of DNA. It is interesting to note that binding of the nucleotide unit with the cluster makes it fluorescent, the study reports the fluorescence activity of (ZnO)3 + nuc-T complex.
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Affiliation(s)
- Indu Kumari
- Theoretical & Computational Chemistry Group, Department of Chemistry, Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India
| | - Navjot Kaur
- Theoretical & Computational Chemistry Group, Department of Chemistry, Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India
| | - Shuchi Gupta
- Department of Applied Sciences, University Institute of Engineering and Technology, Panjab University, Chandigarh, 160014, India
| | - Neetu Goel
- Theoretical & Computational Chemistry Group, Department of Chemistry, Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India.
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44
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Li B, Peng D, Gu FL, Zhu C. Facially Polarized Molecule for Alkalides and Superalkalides with Considerable Nonlinear Optical Response. ChemistrySelect 2018. [DOI: 10.1002/slct.201802769] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Bo Li
- MOE Key Laboratory of Theoretical Chemistry of EnvironmentSchool of Chemistry & Environment of South China Normal University Guangzhou 510006 China
| | - Daoling Peng
- MOE Key Laboratory of Theoretical Chemistry of EnvironmentSchool of Chemistry & Environment of South China Normal University Guangzhou 510006 China
| | - Feng Long Gu
- MOE Key Laboratory of Theoretical Chemistry of EnvironmentSchool of Chemistry & Environment of South China Normal University Guangzhou 510006 China
| | - Chaoyuan Zhu
- MOE Key Laboratory of Theoretical Chemistry of EnvironmentSchool of Chemistry & Environment of South China Normal University Guangzhou 510006 China
- Department of Applied ChemistryInstitute of Molecular Science and Center for Interdisciplinary Molecular ScienceNational Chiao-Tung University Hsinchu 30010 Taiwan
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45
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Pang X, Lin X, Yang J, Zhou X, Yang B, Wang J, Liu Y. Spiro-Phthalides and Isocoumarins Isolated from the Marine-Sponge-Derived Fungus Setosphaeria sp. SCSIO41009. JOURNAL OF NATURAL PRODUCTS 2018; 81:1860-1868. [PMID: 30091601 DOI: 10.1021/acs.jnatprod.8b00345] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Fourteen new polyketides classified as four phthalides, setosphalides A and B, 5- O-desmethylcolletotrialide, and ( S)-colletotrialide (1-4), three isocoumarin derivatives, exserolides I-K (5-7), four pyrones, setosphapyrones A-D (8-11), one furanone (12), and two depsidones (13 and 14), along with 17 known polyketides were isolated from cultures of the sponge-derived fungus Setosphaeria sp. SCSIO41009. The structures and absolute configurations of these new compounds (1-14) were determined by spectroscopic analyses, X-ray diffraction, chiral-phase HPLC analysis, modified Mosher's method, and comparison of ECD spectra to calculations. Setosphalides A (1) and B (2) are the first examples possessing a 5,5 spiroketal skeleton in phthalide derivatives. Botryorhodines I (13) and J (14) showed moderate antifungal activities against the phytopathogenic fungi Colletotrichum asianum and Colletotrichum acutatum. Compound 18 (7- O-demethylmonocerin) exhibited potent radical scavenging activity against DPPH.
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Affiliation(s)
- Xiaoyan Pang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/RNAM Center for Marine Microbiology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou 510220 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Xiuping Lin
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/RNAM Center for Marine Microbiology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou 510220 , China
| | - Jie Yang
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences , Southern Medical University , Guangzhou 510515 , China
| | - Xuefeng Zhou
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/RNAM Center for Marine Microbiology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou 510220 , China
| | - Bin Yang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/RNAM Center for Marine Microbiology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou 510220 , China
| | - Junfeng Wang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/RNAM Center for Marine Microbiology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou 510220 , China
| | - Yonghong Liu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/RNAM Center for Marine Microbiology , South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou 510220 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
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46
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Perylenequione Derivatives with Anticancer Activities Isolated from the Marine Sponge-Derived Fungus, Alternaria sp. SCSIO41014. Mar Drugs 2018; 16:md16080280. [PMID: 30110969 PMCID: PMC6117713 DOI: 10.3390/md16080280] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 08/06/2018] [Accepted: 08/08/2018] [Indexed: 12/13/2022] Open
Abstract
Seven new secondary metabolites classified as two perylenequinone derivatives (1 and 2), an altenusin derivative (3), two phthalide racemates (4 and 5), and two phenol derivatives (6 and 7), along with twenty-one known compounds (8–28) were isolated from cultures of the sponge-derived fungus, Alternaria sp. SCSIO41014. The structures and absolute configurations of these new compounds (1–7) were determined by spectroscopic analysis, X-ray single crystal diffraction, chiral-phase HPLC separation, and comparison of ECD spectra to calculations. Altertoxin VII (1) is the first example possessing a novel 4,8-dihydroxy-substituted perylenequinone derivative, while the phenolic hydroxy groups have commonly always substituted at C-4 and C-9. Compound 1 exhibited cytotoxic activities against human erythroleukemia (K562), human gastric carcinoma cells (SGC-7901), and hepatocellular carcinoma cells (BEL-7402) with IC50 values of 26.58 ± 0.80, 8.75 ± 0.13, and 13.11 ± 0.95 μg/mL, respectively. Compound 11 showed selectively cytotoxic activity against K562, with an IC50 value of 19.67 ± 0.19 μg/mL. Compound 25 displayed moderate inhibitory activity against Staphylococcus aureus with an MIC value of 31.25 μg/mL.
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Haack R, Schulz S, Jansen G. Dispersion interactions between neighboring Bi atoms in (BiH 3 ) 2 and Te(BiR 2 ) 2. J Comput Chem 2018. [PMID: 29533472 DOI: 10.1002/jcc.25209] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Triggered by the observation of a short Bi⋯Bi distance and a BiTeBi bond angle of only 86.6° in the crystal structure of bis(diethylbismuthanyl)tellurane quantum chemical computations on interactions between neighboring Bi atoms in Te(BiR2 )2 molecules (R = H, Me, Et) and in (BiH3 )2 were undertaken. Bi⋯Bi distances atoms were found to significantly shorten upon inclusion of the d shells of the heavy metal atoms into the electron correlation treatment, and it was confirmed that interaction energies from spin component-scaled second-order Møller-Plesset theory (SCS-MP2) agree well with coupled-cluster singles and doubles theory including perturbative triples (CCSD(T)). Density functional theory-based symmetry-adapted perturbation theory (DFT-SAPT) was used to study the anisotropy of the interplay of dispersion attraction and steric repulsion between the Bi atoms. Finally, geometries and relative stabilities of syn-syn and syn-anti conformers of Te(BiR2 )2 (R = H, Me, Et) and interconversion barriers between them were computed. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Rebekka Haack
- Faculty of Chemistry, University Duisburg-Essen, Universitätsstr. 5, Essen, 45117, Germany
| | - Stephan Schulz
- Faculty of Chemistry, University Duisburg-Essen, Universitätsstr. 5, Essen, 45117, Germany
| | - Georg Jansen
- Faculty of Chemistry, University Duisburg-Essen, Universitätsstr. 5, Essen, 45117, Germany
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Yan X, Li W, Zhang H, Cai W, Wang J, Shen W. DFT/TDDFT insight into the impact of ring size of the NHC chelating unit of high effective phosphorescent Platinum (II) complexes. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4467] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xi Yan
- School of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 China
| | - Wenqian Li
- School of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 China
| | - Huize Zhang
- School of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 China
| | - Wanlin Cai
- School of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 China
| | - Jian Wang
- School of Elementary Education; Chongqing Normal University; Chongqing 400715 China
| | - Wei Shen
- School of Chemistry and Chemical Engineering; Southwest University; Chongqing 400715 China
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Kumar P, Cabaj MK, Pazio A, Dominiak PM. Protonated nucleobases are not fully ionized in their chloride salt crystals and form metastable base pairs further stabilized by the surrounding anions. IUCRJ 2018; 5:449-469. [PMID: 30002846 PMCID: PMC6038959 DOI: 10.1107/s2052252518006346] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Accepted: 04/25/2018] [Indexed: 06/08/2023]
Abstract
This paper presents experimental charge-density studies of cytosinium chloride, adeninium chloride hemihydrate and guaninium dichloride crystals based on ultra-high-resolution X-ray diffraction data and extensive theoretical calculations. The results confirm that the cohesive energies of the studied systems are dominated by contributions from intermolecular electrostatic interactions, as expected for ionic crystals. Electrostatic interaction energies (Ees) usually constitute 95% of the total interaction energy. The Ees energies in this study were several times larger in absolute value when compared, for example, with dimers of neutral nucleobases. However, they were not as large as some theoretical calculations have predicted. This was because the molecules appeared not to be fully ionized in the studied crystals. Apart from charge transfer from chlorine to the protonated nucleobases, small but visible charge redistribution within the nucleobase cations was observed. Some dimers of singly protonated bases in the studied crystals, namely a cytosinium-cytosinium trans sugar/sugar edge pair and an adeninium-adeninium trans Hoogsteen/Hoogsteen edge pair, exhibited attractive interactions (negative values of Ees) or unusually low repulsion despite identical molecular charges. The pairs are metastable as a result of strong hydrogen bonding between bases which overcompensates the overall cation-cation repulsion, the latter being weakened due to charge transfer and molecular charge-density polarization.
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Affiliation(s)
- Prashant Kumar
- Biological and Chemical Research Center, Department of Chemistry, University of Warsaw, ul. Żwirki i Wigury 101, Warszawa 02-089, Poland
| | - Malgorzata Katarzyna Cabaj
- Biological and Chemical Research Center, Department of Chemistry, University of Warsaw, ul. Żwirki i Wigury 101, Warszawa 02-089, Poland
| | - Aleksandra Pazio
- Biological and Chemical Research Center, Department of Chemistry, University of Warsaw, ul. Żwirki i Wigury 101, Warszawa 02-089, Poland
| | - Paulina Maria Dominiak
- Biological and Chemical Research Center, Department of Chemistry, University of Warsaw, ul. Żwirki i Wigury 101, Warszawa 02-089, Poland
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50
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Fang W, Wang J, Wang J, Shi L, Li K, Lin X, Min Y, Yang B, Tang L, Liu Y, Zhou X. Cytotoxic and Antibacterial Eremophilane Sesquiterpenes from the Marine-Derived Fungus Cochliobolus lunatus SCSIO41401. JOURNAL OF NATURAL PRODUCTS 2018; 81:1405-1410. [PMID: 29786436 DOI: 10.1021/acs.jnatprod.8b00015] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Three new eremophilane sesquiterpenes, dendryphiellins H-J (1-3), and three new phthalide natural products (4-6) were isolated from the marine-derived fungus Cochliobolus lunatus SCSIO41401. Their structures including absolute configurations were determined by spectroscopic and calculated ECD analyses. Dendryphiellin I (2) showed cytotoxic and antibacterial activities against five cancer cell lines (IC50 1.4 to 4.3 μM) and three bacterial species (MIC 1.5 to 13 μg/mL), respectively. Dendryphiellin J (3), a rare naturally occurring aldoxime analogue, displayed cytotoxicities against ACHN and HepG-2 cells with IC50 values of 3.1 and 5.9 μM, respectively. Further studies indicated that 3 induced apoptosis in ACHN cells in a dose- and time-dependent manner.
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Affiliation(s)
- Wei Fang
- Hubei Biopesticide Engineering Research Center , Hubei Academy of Agricultural Science , Wuhan 430064 , China
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology , Chinese Academy of Sciences , Guangzhou 510301 , China
| | - Jianjiao Wang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology , Chinese Academy of Sciences , Guangzhou 510301 , China
| | - Junfeng Wang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology , Chinese Academy of Sciences , Guangzhou 510301 , China
| | - Liqiao Shi
- Hubei Biopesticide Engineering Research Center , Hubei Academy of Agricultural Science , Wuhan 430064 , China
| | - Kunlong Li
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology , Chinese Academy of Sciences , Guangzhou 510301 , China
| | - Xiuping Lin
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology , Chinese Academy of Sciences , Guangzhou 510301 , China
| | - Yong Min
- Hubei Biopesticide Engineering Research Center , Hubei Academy of Agricultural Science , Wuhan 430064 , China
| | - Bin Yang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology , Chinese Academy of Sciences , Guangzhou 510301 , China
| | - Lan Tang
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences , Southern Medical University , Guangzhou 510515 , China
| | - Yonghong Liu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology , Chinese Academy of Sciences , Guangzhou 510301 , China
| | - Xuefeng Zhou
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology , Chinese Academy of Sciences , Guangzhou 510301 , China
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