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Prakash M, Rudharachari Maiyelvaganan K, Lakshman NG, Mogren Al-Mogren M, Hochlaf M. Formation of Eigen or Zundel Features at Protonated Water Cluster-Aromatic Interfaces. Chemphyschem 2023; 24:e202300267. [PMID: 37283005 DOI: 10.1002/cphc.202300267] [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: 04/16/2023] [Revised: 05/27/2023] [Accepted: 06/02/2023] [Indexed: 06/08/2023]
Abstract
Interfacial interactions of protonated water clusters adsorbed at aromatic surfaces play an important role in biology, and in atmospheric, chemical and materials sciences. Here, we investigate the interaction of protonated water clusters ((H+ H2 O)n (where n=1-3)) with benzene (Bz), coronene (Cor) and dodecabenzocoronene (Dbc)). To study the structure, stability and spectral features of these complexes, computations are done using DFT-PBE0(+D3) and SAPT0 methods. These interactions are probed by AIM electron density topography and non-covalent interactions index (NCI) analyses. We suggest that the excess proton plays a crucial role in the stability of these model interfaces through strong inductive effects and the formation of Eigen or Zundel features. Also, computations reveal that the extension of the π-aromatic system and the increase of the number of water molecules in the H-bounded water network led to a strengthening of the interactions between the corresponding aromatic compound and protonated water molecules, except when a Zundel ion is formed. The present findings may serve to understand in-depth the role of proton localized at aqueous medium interacting with large aromatic surfaces such as graphene interacting with acidic liquid water. Besides, we give the IR and UV-Vis spectra of these complexes, which may help for their identification in laboratory.
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Affiliation(s)
- Muthuramalingam Prakash
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603203, Chengalpattu District, Tamil Nadu, India
| | - K Rudharachari Maiyelvaganan
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603203, Chengalpattu District, Tamil Nadu, India
| | - N Giri Lakshman
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603203, Chengalpattu District, Tamil Nadu, India
| | - Muneerah Mogren Al-Mogren
- Department of Chemistry, College of Sciences, King Saud University, PO Box 2455, Riyadh, 11451, Saudi Arabia
| | - Majdi Hochlaf
- Université Gustave Eiffel, COSYS/IMSE, 5 Bd Descartes, 77454, Champs Sur Marne, France
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2
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Su J, Zhang S, Zheng Z, Xue L. Application of biogenic iron precipitation by strain H117 for tetracycline removal: mechanism of adsorption and activation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:4815-4826. [PMID: 32949365 DOI: 10.1007/s11356-020-10857-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 09/14/2020] [Indexed: 06/11/2023]
Abstract
To date, biogenic metals have opened up a window for new applications in adsorption of contaminants. But there is still little attention to be paid in the removal of tetracycline (TC) by biogenic iron precipitation (BIP). In this paper, the BIP, from iron-based mixotrophic denitrification batch reactor, was estimated for its adsorption property of TC under various parameters to simulate the behavior in aquatic environment. The maximum adsorption capacity for TC was 195.336 mg g-1. Analyses of spectrum verified the existence of Fe3O4 and FeOOH in BIP, which was the main reason for the removal of TC. The adsorption kinetic and isotherm of TC were well fitted to Elovich and Langmuir isotherm models, respectively, indicating that the adsorption process was mainly controlled by chemical adsorption. Furthermore, we proposed a potential mechanism of adsorption: a combination of cation-π, hydrogen bonding (H-bonding), and electrostatic interaction. Additionally, the activation experiment showed that BIP could enhance the degradation of TC (more than 98.00% removal within 1.0 h) by advanced oxidation process (AOP), due to the existence of FeOOH and Fe3O4. Considering its effectiveness in both adsorption and activation performance, BIP is highlighted as an economical and eco-friendly material for TC removal and offers a promising method to resolve sludge disposal in biological treatment of iron-rich groundwater.
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Affiliation(s)
- Junfeng Su
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
| | - Shuai Zhang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Zhijie Zheng
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Lei Xue
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
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3
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Abdolahi Jonghani S, Biglari Z, Gholipour A. NMR investigation of substituent effects on strength of π-π stacking and hydrogen bonding interactions to supports the formation of [2 + 2] photodimerization in (para-X-ba):::(bpe)||(bpe):::(para-X-ba) complexes. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.05.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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4
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López R, Díaz N, Suárez D. Alkali and Alkaline-Earth Cations in Complexes with Small Bioorganic Ligands: Ab Initio Benchmark Calculations and Bond Energy Decomposition. Chemphyschem 2020; 21:99-112. [PMID: 31674092 DOI: 10.1002/cphc.201900877] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 10/15/2019] [Indexed: 12/20/2022]
Abstract
Herein, we report a computational database for the complexes of alkali [Li(I), Na(I), K(I)] and alkaline-earth [Be(II), Mg(II) and Ca(II)] cations with 25 small ligands with varying charge and donor atoms ("O", "N", and "S") that provides geometries and accurate bond energies useful to analyze metal-ligand interactions in proteins and nucleic acids. The role of the ligand→metal charge transfer, the equilibrium bond distance, the electronegativity of the donor atom, the ligand polarizability, and the relative stability of the complexes are discussed in detail. The interacting quantum atoms (IQA) method is used to decompose the binding energy into electrostatic and quantum mechanical contributions. In addition, bond energies are also estimated by means of multipolar electrostatic calculations. No simple correlation exists between bond energies and structural/electronic descriptors unless the data are segregated by the type of ligand or metal. The electrostatic attraction of some molecules (H2 O, NH3 , CH3 OH) towards the metal cations is well reproduced using their (unrelaxed) atomic multipoles, but the same comparison is much less satisfactory for other ligands (e. g. benzene, thiol/thiolate groups, etc.). Besides providing reference structures and bond energies, the database can contribute to validate molecular mechanics potentials capable of yielding a balanced description of alkali and alkaline-earth metals binding to biomolecules.
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Affiliation(s)
- Roberto López
- Departamento de Química y Física Aplicadas, Universidad de León, Campus de Vegazana, s/n., 24071, León (Castilla y León, Spain
| | - Natalia Díaz
- Departamento de Química Física y Analítica, Universidad de Oviedo, Julián Clavería 8, 33006, Oviedo (Asturias, Spain
| | - Dimas Suárez
- Departamento de Química Física y Analítica, Universidad de Oviedo, Julián Clavería 8, 33006, Oviedo (Asturias, Spain
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5
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Afonin AV, Rusinska-Roszak D. A molecular tailoring approach – a new guide to quantify the energy of push–pull effects: a case study on (E)-3-(1H-pyrrol-2-yl)prop-2-enones. Phys Chem Chem Phys 2020; 22:22190-22194. [DOI: 10.1039/d0cp04432f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We report a new approach to quantify the push–pull effect in molecules with internal charge transfer.
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Affiliation(s)
- Andrei V. Afonin
- A. E. Favorsky Irkutsk Institute of Chemistry
- Siberian Division of Russian Academy of Sciences
- Irkutsk 664033
- Russian Federation
| | - Danuta Rusinska-Roszak
- Institute of Chemical Technology and Engineering
- Poznan University of Technology
- Poznan 60-965
- Poland
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6
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The association of π–π stacking and hydrogen bonding interactions in substituted Rebek imide with 2,6-di(isobutyramido)pyridine rings: theoretical insight into X-Rebek imide||pyr complexes. Struct Chem 2019. [DOI: 10.1007/s11224-019-01450-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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7
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Chen N, Huang M, Liu C, Fang G, Liu G, Sun Z, Zhou D, Gao J, Gu C. Transformation of tetracyclines induced by Fe(III)-bearing smectite clays under anoxic dark conditions. WATER RESEARCH 2019; 165:114997. [PMID: 31470282 DOI: 10.1016/j.watres.2019.114997] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 08/13/2019] [Accepted: 08/17/2019] [Indexed: 06/10/2023]
Abstract
Smectite clays are widely found in subsurface soils and waters. Although they strongly sequester tetracyclines (TCs), little is known about their reactions with these antibiotics under dark anoxic conditions. This study investigated the interactions between TCs and Fe-bearing smectite clays and the influences of environmental factors. Fe-bearing smectite clays were shown to significantly induce the transformation of TCs, including tautomerization, dechlorination, and dehydration. Moreover, the adsorbed TCs reduced the structural Fe(III) in clay particles to structural Fe(II) through electron transfer. The transformation of TCs was more readily induced by smectite clays with a higher rather than a lower Fe content. Tetrahedral Fe(III), and distorted cis- or trans-octahedral Fe(III), were more reactive as an electron acceptor than cis-octahedral Fe(III), as observed on the Mössbauer and FTIR spectra. A lower pH facilitated the adsorption of TCs through dimethyl-amino, amide, and conjugated -OH functional groups and induced a higher rate of TCs transformation. The transformation of chlortetracycline (CTC) was faster than that of oxytetracycline or tetracycline (TTC) due to -Cl substitution. The major transformation CTC products included keto-CTC, epi-CTC, iso-CTC, anhydro-CTC and TTC. Mixtures of these transformed products were found to have a higher acute toxicity than their parent compounds to Photobacterium phosphoreum T3. Our study revealed several previously overlooked interactions between TCs and clay particles that could cause these antibiotics to become unstable in the subsurface environment, with negative effects on the soil-borne microbial community.
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Affiliation(s)
- Ning Chen
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, CAS, Nanjing, Jiangsu Province, 210008, China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu Province, 210023, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Meiying Huang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, CAS, Nanjing, Jiangsu Province, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Cun Liu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, CAS, Nanjing, Jiangsu Province, 210008, China
| | - Guodong Fang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, CAS, Nanjing, Jiangsu Province, 210008, China
| | - Guangxia Liu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu Province, 210023, China
| | - Zhaoyue Sun
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, CAS, Nanjing, Jiangsu Province, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Dongmei Zhou
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, CAS, Nanjing, Jiangsu Province, 210008, China; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu Province, 210023, China
| | - Juan Gao
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, CAS, Nanjing, Jiangsu Province, 210008, China.
| | - Cheng Gu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu Province, 210023, China.
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8
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Zhang J, Li X. Intramolecular hydrogen bonding, π-π stacking interactions, and substituent effects of 8-hydroxyquinoline derivative supermolecular structures: a theoretical study. J Mol Model 2019; 25:241. [DOI: 10.1007/s00894-019-4140-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 07/14/2019] [Indexed: 10/26/2022]
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9
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Lu C, Htan B, Fu S, Ma C, Gan Q. Substituent effects on the isomerization of hydrazone switches driven by the intramolecular hydrogen bond. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.06.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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10
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Ghafari Nikoo Jooneghani S, Gholipour A. Mutual cooperation of π-π stacking and pnicogen bond interactions of substituted monomeric Lawesson’s reagent and pyridine rings: Theoretical insight into Pyr||X-PhPS2⊥pyr complexes. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.02.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Chen N, Fang G, Liu G, Zhou D, Gao J, Gu C. The effects of Fe-bearing smectite clays on OH formation and diethyl phthalate degradation with polyphenols and H 2O 2. JOURNAL OF HAZARDOUS MATERIALS 2018; 357:483-490. [PMID: 29936346 DOI: 10.1016/j.jhazmat.2018.06.030] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 05/19/2018] [Accepted: 06/13/2018] [Indexed: 06/08/2023]
Abstract
The natural formation of hydroxyl radicals (OH) is important for the attenuation of organic contaminants. In this study, seven model polyphenols were selected to react with four types of smectite clays with varied Fe contents in the presence of H2O2. Diethyl phthalate (DEP) was selected as a model organic contaminant due to its wide distribution in environment. The results show the appearance of Fe-bearing smectite clays can significantly promote ·OH formation with polyphenols and H2O2 under anoxic conditions; clay particle size, the content and location of lattice Fe in smectite clays greatly affect OH formation. Hydrogen bond between phenolic group and smectite surfaces, and cation assisted hydrogen bond between carboxylic group and clay surfaces are important types of complexation. Electrons can be transferred from coordinated polyphenols to structural Fe(III) atoms in tetrahedral layers or at broken edges to form structural Fe(II) and/or semiquinone radicals, both of which can induce H2O2 decomposition to OH. DEP can be degraded by OH attack, and the main products are proposed as phthalic acid, monomethyl phthalate, hydroxyl-diethyl phthalates. Our findings suggest that Fe(III)-bearing smectite clay can be reduced by polyphenol and produce OH in anoxic environments, which can induce organic contaminants transformation.
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Affiliation(s)
- Ning Chen
- Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science, CAS, Nanjing, Jiangsu Province, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Guodong Fang
- Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science, CAS, Nanjing, Jiangsu Province, 210008, China
| | - Guangxia Liu
- Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science, CAS, Nanjing, Jiangsu Province, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Dongmei Zhou
- Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science, CAS, Nanjing, Jiangsu Province, 210008, China
| | - Juan Gao
- Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science, CAS, Nanjing, Jiangsu Province, 210008, China.
| | - Cheng Gu
- State Key Laboratory of Pollution Control and Resource Reuse School of the Environment, Nanjing University, Nanjing, Jiangsu Province, 210023, China.
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12
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Zhang Y, Chen S, Ying F, Su P, Wu W. Valence Bond Based Energy Decomposition Analysis Scheme and Its Application to Cation−π Interactions. J Phys Chem A 2018; 122:5886-5894. [DOI: 10.1021/acs.jpca.8b04201] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Yang Zhang
- The State Key Laboratory of Physical Chemistry of Solid Surfaces, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, iChEM, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Sifeng Chen
- The State Key Laboratory of Physical Chemistry of Solid Surfaces, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, iChEM, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Fuming Ying
- The State Key Laboratory of Physical Chemistry of Solid Surfaces, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, iChEM, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Peifeng Su
- The State Key Laboratory of Physical Chemistry of Solid Surfaces, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, iChEM, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Wei Wu
- The State Key Laboratory of Physical Chemistry of Solid Surfaces, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, iChEM, and College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
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13
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Mutual interplay between pnicogen–π and tetrel bond in PF3⊥X–Pyr…SiH3CN complexes: NMR, SAPT, AIM, NBO, and MEP analysis. Struct Chem 2018. [DOI: 10.1007/s11224-018-1106-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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14
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Yang L, Qian X, Wang Z, Li Y, Bai H, Li H. Steel slag as low-cost adsorbent for the removal of phenanthrene and naphthalene. ADSORPT SCI TECHNOL 2018. [DOI: 10.1177/0263617418756407] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This study investigates the removal effectiveness and characteristics of phenanthrene and naphthalene using low-cost steel slag with batch experiments. The adsorption characteristics of steel slag were measured and analysed using X-ray fluorescence, X-ray diffraction, and Fourier transform infrared spectroscopy. The batch experiments investigated the effect of the time gradient, pH, and steel slag dosage gradient on the adsorption of the steel slag. The results show that with time and dosage of steel slag increased, the adsorption capacity of phenanthrene and naphthalene increased and gradually became balanced, but pH had no obvious effect on the adsorption of phenanthrene and naphthalene. The Langmuir isotherm model best describes the phenanthrene and naphthalene removal by the steel slag, which shows the adsorption occurring in a monolayer. The maximum adsorption capacity of the steel slag to phenanthrene and naphthalene is 0.043 and 0.041 mg/g, respectively. A pseudo-first-order kinetic model can better represent the adsorption of phenanthrene and naphthalene by steel slag. The research demonstrates that the steel slag has a certain adsorption capacity for phenanthrene and naphthalene.
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Affiliation(s)
- Liyun Yang
- University of Science and Technology Beijing, China
| | | | - Zhi Wang
- University of Science and Technology Beijing, China
| | - Yuan Li
- University of Science and Technology Beijing, China
| | - Hao Bai
- University of Science and Technology Beijing, China
| | - Hong Li
- University of Science and Technology Beijing, China
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15
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NMR investigation of substituent effects on strength the intramolecular hydrogen bonding interaction in X–phenylhydrazones switches: A theoretical study. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2017.03.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Tsuzuki S, Mandai T, Suzuki S, Shinoda W, Nakamura T, Morishita T, Ueno K, Seki S, Umebayashi Y, Dokko K, Watanabe M. Effect of the cation on the stability of cation–glyme complexes and their interactions with the [TFSA]− anion. Phys Chem Chem Phys 2017; 19:18262-18272. [DOI: 10.1039/c7cp02779f] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The interactions of glymes with alkali or alkaline earth metal cations depend strongly on the metal cations.
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17
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Carreño A, Schott E, Zarate X, Manriquez JM, Vega JC, Mardones M, Cowley AH, Chavez I, Hinestroza JP, Arratia-Perez R. DFT studies on coordination models for adsorption essays of Cu(II) and Ni(II) solutions in modified silica gel with iminodiacetic groups. CHEMICAL PAPERS 2016. [DOI: 10.1007/s11696-016-0022-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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18
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Gholipour A, Farhadi S, Neyband RS. Theoretical investigation of the nature and strength of simultaneous interactions of π–π stacking and halogen bond including NMR, SAPT, AIM and NBO analysis. Struct Chem 2016. [DOI: 10.1007/s11224-016-0784-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Azizi A, Ebrahimi A. The X−···benzohydrazide complexes: the interplay between anion-π and H-bond interactions. Struct Chem 2016. [DOI: 10.1007/s11224-016-0839-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Momeni Z, Ebrahimi A. The influence of CH…π interaction on hydrogen bonding ability of –CONH2 functional group of benzamide. Struct Chem 2016. [DOI: 10.1007/s11224-016-0745-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Simultaneous interactions of pyrimidine ring with BeF2 and BF3 in BeF2⋅⋅⋅X–Pyr⋅⋅⋅BF3 complexes: non-cooperativity. J Mol Model 2015; 21:253. [DOI: 10.1007/s00894-015-2795-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Accepted: 08/23/2015] [Indexed: 12/21/2022]
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22
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Momeni Z, Ebrahimi A. Investigation of the effect of π–π stacking interaction on the properties of –CONH2 functional group of benzamide. Struct Chem 2015. [DOI: 10.1007/s11224-015-0615-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Affiliation(s)
- J. Richard Premkumar
- Centre for Molecular Modelling, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - G. Narahari Sastry
- Centre for Molecular Modelling, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India
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24
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Bania KK, Guha AK, Bhattacharyya PK, Sinha S. Effect of substituent and solvent on cation-π interactions in benzene and borazine: a computational study. Dalton Trans 2014; 43:1769-84. [PMID: 24248426 DOI: 10.1039/c3dt52081a] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A DFT and ab initio quantum chemical study has been carried out at different theoretical levels to delve into the role of the cation-π interaction within the main group metal cations (Li(+), Na(+) and K(+)), substituted benzene and borazine. The effects of electron withdrawing and electron donating groups on these non-covalent forces of interaction were also studied. The excellent correlation between Hammett constants and binding energy values indicates that the cation-π interaction is influenced by both inductive and resonance effects. Electron donating groups (EDG) such as -CH3 and -NH2 attached to benzene at the 1, 3 and 5 position and the three boron atoms of borazine were found to strengthen these interactions, while electron withdrawing groups (EWG) such as -NO2 did the reverse. These results were further substantiated by topological analysis using the quantum theory of atoms in molecules (QTAIM). The polarized continuum model (PCM) and the discrete solvation model were used to elucidate the effect of solvation on the cation-π interaction. The size of the cations and the nature of the substituents were found to influence the enthalpy and binding energy of the systems (or complex). In the gas phase, the cation-π interaction was found to be exothermic, whereas in the presence of a polar solvent the interaction was highly endothermic. Thermochemical analysis predicts the presence of thermodynamic driving forces for borazine and benzene substituted with EDG. DFT based reactivity descriptors, such as global hardness (η), chemical potential (μ) and the electrophilicity index (ω) were used to elucidate the effect of the substituent on the reactivity of the cation-π complexes.
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25
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Wireduaah S, Parker TM, Bagwill C, Kirkpatrick CC, Lewis M. Predicting the cation–π binding of substituted benzenes: energy decomposition calculations and the development of a cation–π substituent constant. RSC Adv 2014. [DOI: 10.1039/c4ra08638d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This work proposes a new substituent constant,Π+, to describe cation–π binding using computational methods at the MP2(full)/6-311++G** level of theory with Symmetry Adapted Perturbation Theory (SAPT) calculations on selected cation–π complexes.
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Affiliation(s)
| | | | | | | | - Michael Lewis
- Department of Chemistry
- Saint Louis University
- St. Louis, USA
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Ebrahimi A, Karimi P, Akher FB, Behazin R, Mostafavi N. Investigation of the π–π stacking interactions without direct electrostatic effects of substituents: the aromatic∥aromatic and aromatic∥anti-aromatic complexes. Mol Phys 2013. [DOI: 10.1080/00268976.2013.830784] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Wireduaah S, Parker TM, Lewis M. Effects of the aromatic substitution pattern in cation-π sandwich complexes. J Phys Chem A 2013; 117:2598-604. [PMID: 23452189 DOI: 10.1021/jp309740r] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A computational study investigating the effects of the aromatic substitution pattern on the structure and binding energies of cation-π sandwich complexes is reported. The correlation between the binding energies (Ebind) and Hammett substituent constants is approximately the same as what is observed for cation-π half-sandwich complexes. For cation-π sandwich complexes where both aromatics contain substituents the issue of relative conformation is a possible factor in the strength of the binding; however, the work presented here shows the Ebind values are approximately the same regardless of the relative conformation of the two substituted aromatics. Finally, recent computational work has shown conflicting results on whether cation-π sandwich Ebind values (Ebind,S) are approximately equal to twice the respective half-sandwich Ebind values (Ebind,HS), or if cation-π sandwich Ebind,S values are less than double the respective half-sandwich Ebind,HS values. The work presented here shows that for cation-π sandwich complexes involving substituted aromatics the Ebind,S values are less than twice the respective half-sandwich Ebind,HS values, and this is termed nonadditive. The extent to which the cation-π sandwich complexes investigated here are nonadditive is greater for B3LYP calculated values than for MP2 calculated values and for sandwich complexes with electron-donating substituents than those with electron-withdrawing groups.
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Affiliation(s)
- Selina Wireduaah
- Department of Chemistry, Saint Louis University, 3501 Laclede Avenue, Saint Louis, Missouri 63103, USA
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Solimannejad M, Gholipour A. Revealing substituent effects on the concerted interaction of pnicogen, chalcogen, and halogen bonds in substituted s-triazine ring. Struct Chem 2013. [DOI: 10.1007/s11224-013-0211-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Mahadevi AS, Sastry GN. Cation-π interaction: its role and relevance in chemistry, biology, and material science. Chem Rev 2012; 113:2100-38. [PMID: 23145968 DOI: 10.1021/cr300222d] [Citation(s) in RCA: 719] [Impact Index Per Article: 59.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- A Subha Mahadevi
- Molecular Modeling Group, CSIR-Indian Institute of Chemical Technology Tarnaka, Hyderabad 500 607, Andhra Pradesh, India
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Sredojević DN, Vojislavljević DZ, Tomić ZD, Zarić SD. Parallel stacking interactions in square-planar transition-metal complexes containing fused chelate and C6-aromatic rings. ACTA CRYSTALLOGRAPHICA SECTION B: STRUCTURAL SCIENCE 2012; 68:261-5. [DOI: 10.1107/s0108768112012281] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2011] [Accepted: 03/21/2012] [Indexed: 11/10/2022]
Abstract
Stacking interactions in the crystal structures of square-planar transition metal complexes from the Cambridge Structural Database with five- and six-membered chelate rings fused with C6-arom rings (arom = aromatic) were analyzed. The distribution of distances between the closest C6-arom–C6-arom and C6-arom–chelate contacts shows that in a large fraction of the intermolecular interactions the C6-arom ring of one molecule is closer to the chelate than to the C6-arom ring of the other molecule. These results indicate a possible preference of the C6-arom ring to form stacking contacts with the chelate rings. The preference is ubiquitous and does not depend on the metal type.
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Lewis M, Bagwill C, Hardebeck LKE, Wireduaah S. The use of hammett constants to understand the non-covalent binding of aromatics. Comput Struct Biotechnol J 2012; 1:e201204004. [PMID: 24688634 PMCID: PMC3962106 DOI: 10.5936/csbj.201204004] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Revised: 02/15/2012] [Accepted: 02/16/2012] [Indexed: 11/22/2022] Open
Abstract
Non-covalent interactions of aromatics are important in a wide range of chemical and biological applications. The past two decades have seen numerous reports of arene-arene binding being understood in terms Hammett substituent constants, and similar analyses have recently been extended to cation-arene and anion-arene binding. It is not immediately clear why electrostatic Hammett parameters should work so well in predicting the binding for all three interactions, given that different intermolecular forces dominate each interaction. This review explores such anomalies, and summarizes how Hammett substituent constants have been employed to understand the non-covalent binding in arene-arene, cation-arene and anion-arene interactions.
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Affiliation(s)
- Michael Lewis
- Saint Louis University, 3501 Laclede Avenue, Saint Louis, Missouri, USA 63130
| | - Christina Bagwill
- Saint Louis University, 3501 Laclede Avenue, Saint Louis, Missouri, USA 63130
| | - Laura K E Hardebeck
- Saint Louis University, 3501 Laclede Avenue, Saint Louis, Missouri, USA 63130
| | - Selina Wireduaah
- Saint Louis University, 3501 Laclede Avenue, Saint Louis, Missouri, USA 63130
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Dinadayalane TC, Hassan A, Leszczynski J. A theoretical study of cation--π interactions: Li+, Na+, K+, Be2+, Mg2+ and Ca2+ complexation with mono- and bicyclic ring-fused benzene derivatives. Theor Chem Acc 2012. [DOI: 10.1007/s00214-012-1131-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Premkumar JR, Vijay D, Sastry GN. The significance of the alkene size and the nature of the metal ion in metal–alkene complexes: a theoretical study. Dalton Trans 2012; 41:4965-75. [DOI: 10.1039/c2dt30119a] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Yoshida T, Shimizu M, Harada M, Hitaoka S, Chuman H. Reassessment of Hammett σ as an effective parameter representing intermolecular interaction energy-links between traditional and modern QSAR approaches. Bioorg Med Chem Lett 2011; 22:124-8. [PMID: 22172696 DOI: 10.1016/j.bmcl.2011.11.047] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2011] [Revised: 11/11/2011] [Accepted: 11/14/2011] [Indexed: 11/29/2022]
Abstract
The Hammett σ constant has for a long time been known to be one of most important linear free-energy related parameters that correlate with biological activity. It is a conventionally used electronic parameter in studies of enzymatic quantitative structure-activity relationships (QSAR). However, it is not necessarily obvious why σ represents variations in the free-energy change associated with the complex formation between a congeneric series of ligands with their target protein. So far, several powerful molecular calculations, such as the ab initio fragment molecular orbital (FMO) one, that are directly applicable to ligand-protein complexes have emerged. In this study, we comprehensively reevaluate experimentally derived parameter σ confirming it represents intermolecular interaction energy terms, by applying molecular orbital (MO) calculations to a simple ligand-protein complex model. The current results provide a rational and quantitative basis for bridging the gap between the traditional QSAR approach and 'the modern QSAR one', which involves the molecular calculations to evaluate the overall free-energy change for complex formation.
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Affiliation(s)
- Tatsusada Yoshida
- Institute of Health Biosciences, The University of Tokushima Graduate School, 1-78 Shomachi, Tokushima 770-8505, Japan
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Gholipour AR, Saydi H, Neiband MS, Neyband RS. Simultaneous interactions of pyridine with substituted benzene ring and H–F in X-ben⊥pyr···H–F complexes: a cooperative study. Struct Chem 2011. [DOI: 10.1007/s11224-011-9882-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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Peña-Gallego A, Rodríguez-Otero J, Cabaleiro-Lago EM. A MP2 and DFT study of the influence of complexation on the aromatic character of phosphole. J Mol Model 2011; 18:765-70. [PMID: 21594760 DOI: 10.1007/s00894-011-1107-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2011] [Accepted: 04/20/2011] [Indexed: 11/25/2022]
Abstract
This work is focused in three topical subjects: intermolecular interactions, metal ions, and aromaticity. A comprehensive MP2/6-31 + G and B3LYP/6-31 + G study of the influence of cation-π interactions on the aromatic character of phosphole was conducted. For this purpose, the structures of complexes were optimized at both theoretical level and different magnetic properties were evaluated. The main conclusion is the increase of the aromatic character of the phosphole when complexes with Li(+), Be(2+), and Al(3+) are formed.
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Affiliation(s)
- Angeles Peña-Gallego
- Departamento de Química Física, Facultade de Química, Universidade de Santiago de Compostela, Avda. das Ciencias s/n, 15782 Santiago de Compostela, Spain.
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Abstract
AbstractThe interplay between two important noncovalent interactions involving different aromatic rings is studied by means of ab initio calculations (MP2/6-31++G**) computing the non-additivity energies. In this study we demonstrate the existence of cooperativity effects when cation-π and lone pair-π interactions coexist in the same system. These effects are studied theoretically using energetic and geometric features of the complexes. In addition we use Bader’s theory of atoms-in-molecules and Molecular Interaction Potential with polarization (MIPp) partition scheme to characterize the interactions. Experimental evidence for this combination of interactions has been obtained from the Cambridge Structural Database.
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39
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Towards physical interpretation of Hammett constants: charge transferred between active regions of substituents and a functional group. Struct Chem 2010. [DOI: 10.1007/s11224-010-9676-9] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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40
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Krieck S, Yu L, Reiher M, Westerhausen M. Subvalent Organometallic Compounds of the Alkaline Earth Metals in Low Oxidation States. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.200900966] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sven Krieck
- Institut für Anorganische und Analytische Chemie, Friedrich‐Schiller‐Universität Jena, August‐Bebel‐Str. 2, 07743 Jena, Germany, Fax: +49‐3641‐948102,
| | - Lian Yu
- Laboratorium für Physikalische Chemie, ETH Zurich Hönggerberg Campus, Wolfgang‐Pauli‐Str. 10, 8093 Zurich, Switzerland
| | - Markus Reiher
- Laboratorium für Physikalische Chemie, ETH Zurich Hönggerberg Campus, Wolfgang‐Pauli‐Str. 10, 8093 Zurich, Switzerland
| | - Matthias Westerhausen
- Institut für Anorganische und Analytische Chemie, Friedrich‐Schiller‐Universität Jena, August‐Bebel‐Str. 2, 07743 Jena, Germany, Fax: +49‐3641‐948102,
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Buchanan WD, Allis DG, Ruhlandt-Senge K. Synthesis and stabilization—advances in organoalkaline earth metal chemistry. Chem Commun (Camb) 2010; 46:4449-65. [DOI: 10.1039/c002600j] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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42
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Ebrahimi A, Habibi M, Sadat Neyband R, Reza Gholipour A. Cooperativity of π-stacking and hydrogen bonding interactions and substituent effects on X-ben‖pyr⋯H–F complexes. Phys Chem Chem Phys 2009; 11:11424-31. [DOI: 10.1039/b912419e] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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43
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Cation–π complexes formed between cyclooctatetraene and alkaline earth metals: Predicted and recorded NMR features. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.07.059] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Cheng J, Luo X, Yan X, Li Z, Tang Y, Jiang H, Zhu W. Research progress in cation-π interactions. ACTA ACUST UNITED AC 2008. [DOI: 10.1007/s11426-008-0082-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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45
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Vijay D, Sastry GN. Exploring the size dependence of cyclic and acyclic pi-systems on cation-pi binding. Phys Chem Chem Phys 2007; 10:582-90. [PMID: 18183319 DOI: 10.1039/b713703f] [Citation(s) in RCA: 133] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
MP2(FULL)/6-311++G** calculations are performed on the cation-pi complexes of Li+ and Mg2+ with the pi-face of linear (ethylene, butadiene, hexatriene, and octatetraene) and cyclic (benzene, naphthalene, anthracene, phenanthrene and naphthacene) unsaturated hydrocarbons. The interaction energy is found to increase systematically as the size of the pi-system increases. The higher interaction energy is in good correlation with the extent of charge transfer. The increase in the interaction energy is more dramatic in the case of acyclic systems. The computations reveal that larger pi-systems tend to have higher complexation energy with the metal ions, which will have important implications in our understanding of the structural and functional aspects of metal binding.
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Affiliation(s)
- Dolly Vijay
- Molecular Modeling Group, Indian Institute of Chemical Technology, Tarnaka, Hyderabad, -500 007
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Morris JJ, Noll BC, Honeyman GW, O'Hara CT, Kennedy AR, Mulvey RE, Henderson KW. Organometallic Polymers Assembled from Cation–π Interactions: Use of Ferrocene as a Ditopic Linker Within the Homologous Series [{(Me3Si)2NM}2⋅(Cp2Fe)]∞ (M=Na, K, Rb, Cs; Cp=cyclopentadienyl). Chemistry 2007; 13:4418-32. [PMID: 17455192 DOI: 10.1002/chem.200700219] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Addition of ferrocene to solutions of alkali metal hexamethyldisilazides M(HMDS) in arenes (in which M=Na, K, Rb, Cs) allows the subsequent crystallization of the homologous series of compounds [{(Me(3)Si)(2)NM}(2) (Cp(2)Fe)](infinity) (1-4). Similar reactions using LiHMDS led to the recrystallization of the starting materials. The crystal structures of 1-4 reveal the formation of one-dimensional chains composed of dimeric [{M(HMDS)}(2)] aggregates, which are bridged through neutral ferrocene molecules by eta(5)-cation-pi interactions. In addition, compounds 3 and 4 also contain interchain agostic M--C interactions, producing two-dimensional 4(4)-nets. Whereas 1 and 2 were prepared from toluene, the syntheses of 3 and 4 required the use of tert-butylbenzene as the reaction media. The attempted crystallization of 3 and 4 from toluene resulted in formation of the mixed toluene/ferrocene solvated complexes [{(Me(3)Si)(2)NM)(2)}(2) (Cp(2)Fe)(x)(Tol)(y)](infinity) (in which M=Rb, x=0.6, y=0.8, 5; M=Cs, x=0.5, y=1, 6). The extended solid-state structures of 5 and 6 are closely related to the 4(4)-sheets 3 and 4, but are now assembled from a combination of cation-pi, agostic, and pi-pi interactions. The charge-separated complex [K{(C(6)H(6))(2)Cr}(1.5)(Mes)][Mg(HMDS)(3)] (15) was also structurally characterized and found to adopt an anionic two-dimensional 6(3)-network through doubly eta(3)-coordinated bis(benzene)chromium molecules. DFT calculations at the B3 LYP/6-31G* level of theory indicate that the binding energies of both ferrocene and toluene to the M(HMDS) dimers increases in the sequence Li<Na<K. This pattern is a consequence of the larger metals allowing more open coordination spheres to support cation-pi contacts. By comparison, binding of the isolated metal cations to the aromatic groups follow the reverse order K<Na<Li. A combined analysis of theoretical and experimental data suggest that ferrocene is a stronger cation-pi donor than toluene for the lighter metals, but that this difference is eliminated on descending the group.
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Affiliation(s)
- J Jacob Morris
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556-5670, USA
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47
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Song Y, Guo C, Sun L, Wei G, Peng C, Wang L, Sun Y, Li Z. Effects of bridge ions, DNA species, and developing temperature on flat-lying DNA monolayers. J Phys Chem B 2007; 111:461-8. [PMID: 17214498 DOI: 10.1021/jp064176k] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Recently, we have successfully constructed flat-lying DNA monolayers on a mica surface (J. Phys. Chem. B 2006, 110, 10792-10798). In this work, the effects of various factors including bridge ions, DNA species, and developing temperature on the configuration of DNA monolayers have been investigated by atomic force microscopy (AFM) in detail. AFM results show that the species of bridge ions and developing temperature play a crucial role during the formation process. For example, the divalent cation Zn2+ resulted in many DNA chains stuck side by side in the monolayers due to the strong interactions between it and DNA's bases or the mica surface. Most DNA chain's conglutinations disappeared when the developing temperature was higher than 40 degrees C. Cd2+ and Ca2+ produced more compact DNA monolayers with some obvious aggregations, especially for the DNA monolayers constructed by using Ca2+ as the bridge ion. Co2+ produced well-ordered, flat-lying DNA monolayers similar to that of Mg2+. Furthermore, it was found that the flat-lying DNA monolayers could still form on a mica surface when plasmid DNA pBR 322 and linear DNA pBR 322/Pst I were used as the DNA source. Whereas, it was hard to form DNA monolayers on a (3-aminopropyl)triethoxysilane-mica surface because the strong interactions between DNA and substrate prevented the lateral movement of DNA molecules. These results suggested that the appropriate interactions between divalent cations and DNA or mica surface were important for the formation of flat-lying DNA monolayers. The obtained information is a necessary supplement to our previous studies on the formation kinetics of such monolayers and may be useful for practical application of the monolayers and further theoretical studies.
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Affiliation(s)
- Yonghai Song
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, Changchun 130022, Jilin Province, People's Republic of China
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Li X, Lee JS, Kraatz HB. Electrochemical detection of single-nucleotide mismatches using an electrode microarray. Anal Chem 2007; 78:6096-101. [PMID: 16944889 DOI: 10.1021/ac060533b] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Gold electrode arrays with electrode diameters of 10 mum were used for the detection of eight single-nucleotide mismatches in unlabeled and prehybridized DNA by electrochemical impedance spectroscopy (EIS). Because of the differences in the electrical properties of films of duplex DNA (normal duplex DNA in B-form) in the presence and absence of Zn(2+) at pH > or = 8.6, Randles equivalent circuits were employed to evaluate the EIS results. The difference in the charge-transfer resistance (DeltaR(CT)) between B-DNA (absence of Zn2+ at pH > or = 8.6) and M-DNA (presence of Zn2+ at pH > or = 8.6) allows unequivocal detection of all eight single-nucleotide mismatches within a 20-mer DNA sequence. After dehybridization/rehybridization with target DNA, DeltaR(CT) allows the discrimination of single-nucleotide mismatches with concentrations of the target strand as low as 10 fM. Although the presence of protein impurities (bovine serum albumin, 10 microg/mL) interferes with the detection of the target strand (1 pM detection limit), the presence of nontarget DNA (calf thymus DNA, 10(-8) M) does not interfere, and the detection limit for recognition of the target strand remains at 10 fM.
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Affiliation(s)
- Xiaohong Li
- Department of Biochemistry, University of Saskatchewan, 107 Wiggins Road, Saskatoon, Saskatchewan, Canada S7N 5E5
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49
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Li X, Zhou Y, Sutherland TC, Baker B, Lee JS, Kraatz HB. Chip-based microelectrodes for detection of single-nucleotide mismatch. Anal Chem 2007; 77:5766-9. [PMID: 16131094 DOI: 10.1021/ac050741o] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Microelectrode arrays having eight 10-microm-diameter gold microelectrodes arranged on a gold-covered Si chip were designed and characterized. The chips prove useful for the detection of single-nucleotide mismatches in unlabeled and prehybridized DNA by electrochemical impedance spectroscopy.
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Affiliation(s)
- Xiaohong Li
- Department of Biochemistry, University of Saskatchewan, 107 Wiggins Road, Saskatoon, SK, Canada S7N 5E5
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50
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Influence of metal and ligand types on stacking interactions of phenyl rings with square-planar transition metal complexes. OPEN CHEM 2007. [DOI: 10.2478/s11532-006-0068-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AbstractIn order to find out whether metal type influences the stacking interactions of phenyl rings in square-planar complexes, geometrical parameters for Cu, Ni, Pd and Pt complexes, with and without chelate rings, were analyzed and compared. By searching the Cambridge Structural Database, 220 structures with Cu complexes, 211 with Ni complexes, 285 with Pd complexes, and 220 with Pt complexes were found. The results show that the chelate ring has a tendency to make the stacking interaction with the phenyl ring independent of metal type in the chelate ring. However, there are some differences among metals for complexes without a chelate ring. There are a number of structures containing Pd and Pt complexes, without chelate rings, that have short carbon-metal distances and parallel orientations of the phenyl ring with respect to the coordination plane. It was found that some of these complexes have a common fragment, CN, as a part of the ligands. This indicates that the CN supports stacking interactions of square planar complexes with the phenyl ring.
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