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Quantum chemical studies of molecular structure, vibrational spectra and nonlinear optical properties of p-iodoaniline and p-bromoaniline. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128939] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Wang C, Chen W, Yang L, Wei R, Ni J, Yang Y. Insights into the roles of the morphological carbon structure and ash in the sorption of aromatic compounds to wood-derived biochars. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 693:133455. [PMID: 31362225 DOI: 10.1016/j.scitotenv.2019.07.261] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 06/23/2019] [Accepted: 07/17/2019] [Indexed: 05/18/2023]
Abstract
Currently, it is still lack of systematic and in-depth knowledge regarding the co-effect of carbon-based fractions and ash in the sorption behavior of biochars. Therefore, pristine wood-derived biochars (PBCs) produced at different temperatures and their corresponding de-ashed versions (DBCs) were used to determine the roles of carbon's morphological structure and ash in sorption of aromatic compounds (toluene, m-toluidine, and m-nitrotoluene) to biochars. The results showed that biochars produced at 300-400 °C (mainly uncarbonized organic matter, UCOM) and 900 °C (turbostratic carbon, TC) may have stronger partition effect and pore filling effect with π-π interaction, respectively, and thus have greater sorption coefficients (Lg Kd) than biochars produced at 600 °C (pyrogenic amorphous carbon, PAC), which are probably dominated by surface hydrophobic effect. Meanwhile, TC had a greater Lg Kd than UCOM at low adsorbate concentrations (Ce), but exhibited an opposite trend at high Ce. The Lg Kd values of DBCs are always greater than those of PBCs, indicating ash has an inhibitory effect on sorption of aromatic compounds to biochars. Furthermore, the role of ash in sorption behavior of PBCs would vary with solution pH. At a neutral pH, PBCs have the maximum sorption quantity for aromatic compounds due to the formed cation-π bond between cations of ash and aromatic compounds. However, the acidic pH enhanced the dissolution of cations in ash and the basic pH enhanced the hydroxylation of cations in ash. Therefore, both acidic and basic pH weakened the cation-π bond between ash and aromatic compounds and decreased the sorption of aromatic compounds on PBCs. The results suggest that de-ashed biochars with more UCOM or TC are effective sorbents for sequestration of aromatic compounds, and provide a well-designed method for improving the sorption efficiency of biochars.
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Affiliation(s)
- Caiting Wang
- Ministry of Education Key Laboratory of Humid Subtropical Eco-Geographical Process, Fujian Provincial Key Laboratory for Plant Eco-Physiology, College of Geographical Science, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Weifeng Chen
- Ministry of Education Key Laboratory of Humid Subtropical Eco-Geographical Process, Fujian Provincial Key Laboratory for Plant Eco-Physiology, College of Geographical Science, Fujian Normal University, Fuzhou, Fujian 350007, China.
| | - Liuming Yang
- Ministry of Education Key Laboratory of Humid Subtropical Eco-Geographical Process, Fujian Provincial Key Laboratory for Plant Eco-Physiology, College of Geographical Science, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Ran Wei
- Ministry of Education Key Laboratory of Humid Subtropical Eco-Geographical Process, Fujian Provincial Key Laboratory for Plant Eco-Physiology, College of Geographical Science, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Jinzhi Ni
- Ministry of Education Key Laboratory of Humid Subtropical Eco-Geographical Process, Fujian Provincial Key Laboratory for Plant Eco-Physiology, College of Geographical Science, Fujian Normal University, Fuzhou, Fujian 350007, China.
| | - Yusheng Yang
- Ministry of Education Key Laboratory of Humid Subtropical Eco-Geographical Process, Fujian Provincial Key Laboratory for Plant Eco-Physiology, College of Geographical Science, Fujian Normal University, Fuzhou, Fujian 350007, China
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Choi HW, Kim KK, Jeong BG, Song JK, Park SM. Structures and infrared photodissociation of [(aniline)-(methanol)-(water) 2] . SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 220:117119. [PMID: 31141781 DOI: 10.1016/j.saa.2019.05.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 04/30/2019] [Accepted: 05/10/2019] [Indexed: 06/09/2023]
Abstract
The structures of [(aniline)-(methanol)-(water)2]+ were investigated by infrared spectroscopy coupled with linear tandem mass spectrometry. We suggest the most stable structure of [(aniline)-(methanol)-(water)2]+ through infrared photodissociation spectra supported by the density functional theory calculations at the level of ωB97X-D/cc-pVQZ. Methanol and one water molecule formed hydrogen bonding with the amino group of aniline, while the other water formed hydrogen bonding with methanol. Upon infrared excitation of [(aniline)-(methanol)-(water)2]+, the water molecule connected to methanol turned out to be preferentially ejected, although the total internal energy in the cluster ion was large enough to dissociate other solvent molecules. This unique dissociation feature was attributed to the significant difference in the dissociation rates as obtained by the Rice-Ramsperger-Kassel-Marcus theory calculations as well as structural restriction.
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Affiliation(s)
- Hyun Wook Choi
- Department of Chemistry, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Kuk Ki Kim
- Department of Chemistry, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Bong Gyu Jeong
- Department of Chemistry, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Jae Kyu Song
- Department of Chemistry, Kyung Hee University, Seoul 02447, Republic of Korea.
| | - Seung Min Park
- Department of Chemistry, Kyung Hee University, Seoul 02447, Republic of Korea.
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Roy M, Alauddin M, Song JK, Park SM. Structures of aniline(pyrrole) +, aniline(ethanol) +, and aniline-(benzene) . SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 204:665-669. [PMID: 29982157 DOI: 10.1016/j.saa.2018.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 06/14/2018] [Accepted: 07/01/2018] [Indexed: 06/08/2023]
Abstract
Molecular structures of aniline(pyrrole)+, aniline(ethanol)+, and aniline(benzene)+ produced via resonance two-photon ionization at 266 nm were analyzed by infrared predissociation spectroscopy coupled with tandem mass spectrometry. Structural optimization and frequency calculation using density functional theory were carried out to suggest the most probable isomers which are in good agreement with the observed infrared absorption spectra. Intermolecular bonds in the cluster ions were formed such that the electronegative oxygen atom of the solvent molecule or the pi electron of the aromatic ring forms a hydrogen bonding to NH of aniline.
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Affiliation(s)
- Madhusudan Roy
- Department of Chemistry, Kyung Hee University, Seoul 02447, South Korea
| | - Mohammad Alauddin
- Department of Chemistry, Kyung Hee University, Seoul 02447, South Korea
| | - Jae Kyu Song
- Department of Chemistry, Kyung Hee University, Seoul 02447, South Korea
| | - Seung Min Park
- Department of Chemistry, Kyung Hee University, Seoul 02447, South Korea.
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Lengyel J, Poterya V, Fárník M. Proton transfer and isotope-induced reaction in aniline cluster ions. JOURNAL OF MASS SPECTROMETRY : JMS 2015; 50:643-649. [PMID: 25800202 DOI: 10.1002/jms.3572] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 12/09/2014] [Accepted: 01/12/2015] [Indexed: 06/04/2023]
Abstract
The proton transfer (PT) and other intraclusters reactions occurring after electron ionization of aniline clusters (PhNH2)N are investigated by the time-of-flight mass spectrometry. The mass spectra are recorded for different expansion conditions leading to the generation of different cluster sizes. Several fragment ions are shown to originate from intracluster reactions, namely, [Ph](+), [PhNH3](+) and [Ph-N-Ph](+). Reaction schemes are proposed for these ions starting with the PT process. The mass region beyond the monomer mass is dominated by cluster ions (PhNH2)n(+) accompanied by satellites with ±H and +2H. In experiments with deuterated species, new fragment ions are identified. The aniline isotopomer d5-PhNH2 yields the fragment ions (PhNH2)n⋅(N-Ph-NH2)(+). Analogical series is observed in experiments with d7-PhND2, and additional fragments occur corresponding to (PhND2)n⋅(D2N-ND-Ph-ND-ND2)(+) ions. The possible reaction pathways to these ions and the unusual isotope effects are discussed.
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Affiliation(s)
- Jozef Lengyel
- J. Heyrovský Institute of Physical Chemistry v.v.i., Academy of Sciences of the Czech Republic, Dolejškova 3, 18223, Prague, Czech Republic; Department of Physical Chemistry, University of Chemistry and Technology, Technická 5, 16628, Prague, Czech Republic
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Reid SA, Nyambo S, Muzangwa L, Uhler B. π-Stacking, C–H/π, and Halogen Bonding Interactions in Bromobenzene and Mixed Bromobenzene–Benzene Clusters. J Phys Chem A 2013; 117:13556-63. [DOI: 10.1021/jp407544c] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Scott A. Reid
- Department of Chemistry, Marquette University,
P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, United States
| | - Silver Nyambo
- Department of Chemistry, Marquette University,
P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, United States
| | - Lloyd Muzangwa
- Department of Chemistry, Marquette University,
P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, United States
| | - Brandon Uhler
- Department of Chemistry, Marquette University,
P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, United States
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Muzangwa L, Nyambo S, Uhler B, Reid SA. On π-stacking, C-H/π, and halogen bonding interactions in halobenzene clusters: Resonant two-photon ionization studies of chlorobenzene. J Chem Phys 2012; 137:184307. [DOI: 10.1063/1.4765102] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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Zhang X, Brauer NB, Berden G, Rijs AM, Drabbels M. Mid-infrared spectroscopy of molecular ions in helium nanodroplets. J Chem Phys 2012; 136:044305. [DOI: 10.1063/1.3678011] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yamamoto N, Miyoshi E. Classical trajectory calculations of intramolecular vibrational energy redistribution. II. Phenol-water complex. J Chem Phys 2004; 121:2067-70. [PMID: 15260760 DOI: 10.1063/1.1767812] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Ab initio classical trajectory calculations have been applied to the intramolecular vibrational energy redistribution process of an O-H stretching vibration for phenol cation, [phenol]+, and its hydrogen-bonded water complex, [phenol-water]+. In phenol cation, a single narrow peak in the power spectrum, obtained by Fourier transformation of the autocorrelation function of its total momentum, indicates that the initial energy given to the O-H stretching oscillator of the phenol moiety is conserved and no energy flow occurs. On the other hand, for phenol-water cation, the calculated broadened power spectrum implies that the initial energy is not conserved and the energy flow causes an energy redistribution among various vibrational modes.
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Affiliation(s)
- Norifumi Yamamoto
- Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-Park, Fukuoka 816-8580, Japan
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Honkawa Y, Inokuchi Y, Ohashi K, Nishi N, Sekiya H. Infrared spectra and structures of aniline+–furan and aniline+–phenol. Preference between π-type and σ-type hydrogen-bonded structures. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)00985-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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