1
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Yin Y, Ma L, Xu X, Tian Y, Wen S, Luo J. Thinning of glycerol in the presence of multi-walled carbon nanotubes. J Chem Phys 2019. [DOI: 10.1063/1.5098831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Yanchao Yin
- Department of Mechanical Engineering, State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
| | - Liran Ma
- Department of Mechanical Engineering, State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
| | - Xuefeng Xu
- School of Technology, Beijing Forestry University, Beijing 100083, China
| | - Yu Tian
- Department of Mechanical Engineering, State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
| | - Shizhu Wen
- Department of Mechanical Engineering, State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
| | - Jianbin Luo
- Department of Mechanical Engineering, State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
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2
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Geiger DK, Geiger HC, Moore SM. Inter-molecular inter-actions in a phenol-substituted benzimidazole. Acta Crystallogr E Crystallogr Commun 2019; 75:272-276. [PMID: 30800466 PMCID: PMC6362671 DOI: 10.1107/s2056989019001270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 01/23/2019] [Indexed: 11/10/2022]
Abstract
Hydrogen bonding plays an important role in the design of solid-state structures and gels with desirable properties. 1-(4-Hydroxybenzyl)-2-(4-hydroxyphenyl)-5,6-dimethyl-1H-benzimidazole was isolated as the acetone disolvate, C22H20N2O2·2C3H6O. O-H⋯N hydrogen bonding between benz-imidazole mol-ecules results in chains parallel to [010]. One of the acetone solvate mol-ecules participates in O-H⋯O hydrogen bonding with the benzimidazole derivative. C-H⋯π inter-actions are observed in the extended structure. Hirshfeld surface analysis was used to explore the inter-molecular inter-actions and density functional theory was used to estimate the strength of the hydrogen bonds.
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Affiliation(s)
- David K. Geiger
- Department of Chemistry, SUNY-College at Geneseo, Geneseo, NY 14454, USA
| | - H. Cristina Geiger
- Department of Chemistry, SUNY-College at Geneseo, Geneseo, NY 14454, USA
| | - Shawn M. Moore
- Department of Chemistry, SUNY-College at Geneseo, Geneseo, NY 14454, USA
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3
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Pfletscher M, Wysoglad J, Gutmann JS, Giese M. Polymorphism of hydrogen-bonded star mesogens – a combinatorial DFT-D and FT-IR spectroscopy study. RSC Adv 2019; 9:8444-8453. [PMID: 35518674 PMCID: PMC9061708 DOI: 10.1039/c8ra09458f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 03/01/2019] [Indexed: 12/13/2022] Open
Abstract
A comprehensive study combining detailed computational analyses with temperature-variable FT-IR experiments was performed in order to elucidate the structure of the hydrogen-bonded liquid crystals based on phloroglucinol and azopyridine in their mesophase. Conformational analysis revealed three relevant conformers: star, λ- and E-shape. The results demonstrate an entropy-driven unfolding mechanism of the assembly. The stability of the conformers is given by intermolecular π–π and dispersion interactions of the azopyridine side chains. Correlating the calculated vibrational frequency with experimental FT-IR spectra suggests a λ-folded conformation of the assemblies as the predominant species in the mesophase. The structure of hydrogen-bonded star mesogens is investigated using modern quantum chemistry methods in combination with infrared spectroscopy.![]()
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Affiliation(s)
- Michael Pfletscher
- Institute of Organic Chemistry
- University Duisburg-Essen
- 45141 Essen
- Germany
| | - Janek Wysoglad
- Institute of Physical Chemistry
- University Duisburg-Essen
- 45141 Essen
- Germany
| | - Jochen S. Gutmann
- Institute of Physical Chemistry
- CENIDE
- University Duisburg-Essen
- 45141 Essen
- Germany
| | - Michael Giese
- Institute of Organic Chemistry
- University Duisburg-Essen
- 45141 Essen
- Germany
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4
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Benassi E, Akhmetova K, Fan H. The impact on the ring related vibrational frequencies of pyridine of hydrogen bonds with haloforms – a topology perspective. Phys Chem Chem Phys 2019; 21:1724-1736. [DOI: 10.1039/c8cp04789h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An intermolecular ring structure is identified for the hydrogen bonding system of pyridine and haloforms.
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Affiliation(s)
- Enrico Benassi
- Department of Chemistry
- School of Science and Technology
- Nazarbayev University
- 010000 Astana
- Kazakhstan
| | - Kamila Akhmetova
- Department of Chemistry
- School of Science and Technology
- Nazarbayev University
- 010000 Astana
- Kazakhstan
| | - Haiyan Fan
- Department of Chemistry
- School of Science and Technology
- Nazarbayev University
- 010000 Astana
- Kazakhstan
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5
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Tabatabaei Rezaei SJ, Hesami A, Khorramabadi H, Amani V, Malekzadeh AM, Ramazani A, Niknejad H. Pt(II) complexes immobilized on polymer-modified magnetic carbon nanotubes as a new platinum drug delivery system. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4401] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Seyed Jamal Tabatabaei Rezaei
- Laboratory of Novel Drug Delivery Systems, Department of Chemistry; Faculty of Science, University of Zanjan; PO Box 45195-313 Zanjan Iran
| | - Ali Hesami
- Laboratory of Novel Drug Delivery Systems, Department of Chemistry; Faculty of Science, University of Zanjan; PO Box 45195-313 Zanjan Iran
| | - Hossein Khorramabadi
- Laboratory of Novel Drug Delivery Systems, Department of Chemistry; Faculty of Science, University of Zanjan; PO Box 45195-313 Zanjan Iran
| | - Vahid Amani
- Department of Chemistry; Farhangian University; Tehran Iran
| | - Asemeh Mashhadi Malekzadeh
- Laboratory of Novel Drug Delivery Systems, Department of Chemistry; Faculty of Science, University of Zanjan; PO Box 45195-313 Zanjan Iran
| | - Ali Ramazani
- Laboratory of Novel Drug Delivery Systems, Department of Chemistry; Faculty of Science, University of Zanjan; PO Box 45195-313 Zanjan Iran
| | - Hassan Niknejad
- Department of Pharmacology, School of Medicine; Shahid Beheshti University of Medical Sciences; Tehran Iran
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6
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Bratskaya S, Voit A, Privar Y, Ziatdinov A, Ustinov A, Marinin D, Pestov A. Metal ion binding by pyridylethyl-containing polymers: experimental and theoretical study. Dalton Trans 2018; 45:12372-83. [PMID: 27417529 DOI: 10.1039/c6dt01435f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Binding of Cu(2+), Ni(2+) and Ag(+) ions to polyallylamine (PAA), polyethylenimine (PEI), poly(N-2-(2-pyridyl)ethylallylamine) (PEPAA), poly(N-2-(2-pyridyl)ethylethylenimine) (PEPEI), and N-2-(2-pyridyl)ethylchitosan (PEC) has been investigated using batch sorption experiments, spectrophotometric titration, ESR, and XPS to elucidate how the structure of polymer precursors affects the ion binding efficiency of their pyridylethylated derivatives. It has been shown that pyridylethylation increases the sorption capacities of PAA and PEI cross-linked with epichlorohydrin toward Ag(+) and Ni(2+) ions, but does not improve or decrease that toward Cu(2+) ions. PEC was the most efficient material for Ag(+) ion sorption with the sorption capacity of 1.21 mmol g(-1). The highest sorption capacity for Ni(2+) (0.62 mmol g(-1)) was found for PEPEI. According to density functional theory (DFT) calculations, lower Cu(2+) binding efficiency to PEPEI results from the "looser" structure of this complex in comparison with unmodified PEI. DFT calculations have also suggested that the Cu(2+) ion is four-coordinated in the complexes with PEPAA and PAA and five-coordinated in all other complexes, which have the structures of distorted square pyramids with Cu-N bond lengths varying significantly depending on the ligand nature. The results of the theoretical investigations of the Cu(2+) complex structures were supported by the ESR data, which revealed the decrease of A‖ and the increase of g‖ values with increasing deviation from the square planar geometry of complexes in the ligands in the order PEI < PEPEI < PEPAA.
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Affiliation(s)
- Svetlana Bratskaya
- Institute of Chemistry, Far East Branch of RAS, 159, prosp.100-letiya Vladivostoka, Vladivostok 690022, Russia.
| | - Alexey Voit
- Institute of Chemistry, Far East Branch of RAS, 159, prosp.100-letiya Vladivostoka, Vladivostok 690022, Russia.
| | - Yuliya Privar
- Institute of Chemistry, Far East Branch of RAS, 159, prosp.100-letiya Vladivostoka, Vladivostok 690022, Russia.
| | - Albert Ziatdinov
- Institute of Chemistry, Far East Branch of RAS, 159, prosp.100-letiya Vladivostoka, Vladivostok 690022, Russia.
| | - Alexander Ustinov
- Institute of Chemistry, Far East Branch of RAS, 159, prosp.100-letiya Vladivostoka, Vladivostok 690022, Russia.
| | - Dmitry Marinin
- Institute of Chemistry, Far East Branch of RAS, 159, prosp.100-letiya Vladivostoka, Vladivostok 690022, Russia.
| | - Alexander Pestov
- Institute of Chemistry, Far East Branch of RAS, 159, prosp.100-letiya Vladivostoka, Vladivostok 690022, Russia. and I. Ya. Postovsky Institute of Organic Synthesis, Ural Branch of RAS, 20, S. Kovalevskoy str., Yekaterinburg 620990, Russia
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7
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Tabatabaei Rezaei SJ, Khorramabadi H, Hesami A, Ramazani A, Amani V, Ahmadi R. Chemoselective Reduction of Nitro and Nitrile Compounds with Magnetic Carbon Nanotubes-Supported Pt(II) Catalyst under Mild Conditions. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b02795] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
| | - Hossein Khorramabadi
- Department
of Chemistry, Faculty of Science, University of Zanjan, P.O. Box 45195-313, Zanjan, Iran
| | - Ali Hesami
- Department
of Chemistry, Faculty of Science, University of Zanjan, P.O. Box 45195-313, Zanjan, Iran
| | - Ali Ramazani
- Department
of Chemistry, Faculty of Science, University of Zanjan, P.O. Box 45195-313, Zanjan, Iran
| | - Vahid Amani
- Department
of Chemistry, Farhangian University, Tehran, Iran
| | - Roya Ahmadi
- Department
of Chemistry, Yadegar-e-Imam Khomeini (RAH) Branch, Islamic Azad University, Tehran, Iran
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8
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Fedorov MS, Giricheva NI, Shpilevaya KE, Lapykina EA, Syrbu SA. Potential mesogens based on pyridine derivatives: The geometric structure, conformational properties and characteristics of intermolecular hydrogen bonds. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.10.094] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Xie F, Huang C, Wang F, Huang L, Weiss RA, Leng J, Liu Y. Carboxyl-Terminated Polybutadiene–Poly(styrene-co-4-vinylpyridine) Supramolecular Thermoplastic Elastomers and Their Shape Memory Behavior. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01785] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fang Xie
- Department of Astronautical Science and
Mechanics, Harbin Institute of Technology, Harbin 150001, China
- Department of Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Chongwen Huang
- Department of Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Fei Wang
- Department of Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Longnan Huang
- Department of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China
| | - R. A. Weiss
- Department of Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Jinsong Leng
- Center for Composite Materials and Structures, Harbin Institute of Technology, Harbin 150080, China
| | - Yanju Liu
- Department of Astronautical Science and
Mechanics, Harbin Institute of Technology, Harbin 150001, China
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10
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Pratik SM, Datta A. Nonequimolar Mixture of Organic Acids and Bases: An Exception to the Rule of Thumb for Salt or Cocrystal. J Phys Chem B 2016; 120:7606-13. [PMID: 27400140 DOI: 10.1021/acs.jpcb.6b05830] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Saied Md Pratik
- Department
of Spectroscopy, Indian Association for the Cultivation of Science, Jadavpur-700032, West Bengal, India
| | - Ayan Datta
- Department
of Spectroscopy, Indian Association for the Cultivation of Science, Jadavpur-700032, West Bengal, India
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11
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Spada L, Gou Q, Giuliano BM, Caminati W. Interactions between Carboxylic Acids and Heteroaromatics: A Rotational Study of Formic Acid–Pyridine. J Phys Chem A 2016; 120:5094-8. [DOI: 10.1021/acs.jpca.6b00387] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Lorenzo Spada
- Dipartimento
di Chimica, “G. Ciamician” dell’Università, Via Selmi 2, I-40126 Bologna, Italy
| | - Qian Gou
- Dipartimento
di Chimica, “G. Ciamician” dell’Università, Via Selmi 2, I-40126 Bologna, Italy
- College
of Chemistry and Chemical Engineering, Chongqing University, Daxuechengnan
Road 55, Chongqing, 401331, China
| | - Barbara M. Giuliano
- Dipartimento
di Chimica, “G. Ciamician” dell’Università, Via Selmi 2, I-40126 Bologna, Italy
| | - Walther Caminati
- Dipartimento
di Chimica, “G. Ciamician” dell’Università, Via Selmi 2, I-40126 Bologna, Italy
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12
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Li Y, Samet C. Polymer Soft-Landing Isolation of Acetylene on Polystyrene and Poly(vinylpyridine): A Novel Approach to Probing Hydrogen Bonding in Polymers. J Phys Chem B 2015; 119:12336-44. [PMID: 26317266 DOI: 10.1021/acs.jpcb.5b06600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hydrogen-bonded complexes of acetylene (Ac) with the polymers polystyrene (PS), poly(4-vinylpyridine) (P4VP), and poly(2-vinylpyridine) (P2VP) have been characterized for the first time at 16 K in a "polymer soft-landing isolation" experiment which is being pioneered in our research laboratory. In particular, changes in vibrational modes of Ac provide ample evidence for hydrogen-bonded complexes between Ac and the phenyl groups of PS or the pyridyl groups of P4VP and P2VP. With PS, the proton on the top Ac molecule of the classic T-shaped Ac dimer interacts with the π cloud of the benzene (Bz) ring to form a C-H---π interaction, while the π cloud of the lower Ac forms a second C-H---π interaction with a proton on the Bz ring. An analogous (ring)1-(Ac)2 double interaction occurs between an Ac dimer and the pyridine (Pyr) rings on both P2VP and P4VP, yielding a C-H---N and C-H---π interaction. With P4VP and P2VP a second bridged (ring)2-(Ac)2 product is formed, with the Ac dimer forming nearly collinear C-H---N hydrogen bonds to adjacent Pyr rings. On P2VP this bridged product is the only one after extensive annealing. These complexes in which Ac acts as both proton donor and acceptor have not previously been observed in conventional matrix isolation experiments. This study is the second from our laboratory employing this method, which represents a slight modification of the traditional matrix isolation technique.
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Affiliation(s)
- Yike Li
- Department of Chemistry, Dickinson College , Carlisle, Pennsylvania 17013, United States
| | - Cindy Samet
- Department of Chemistry, Dickinson College , Carlisle, Pennsylvania 17013, United States
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13
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Bavykina AV, Goesten MG, Kapteijn F, Makkee M, Gascon J. Efficient production of hydrogen from formic acid using a covalent triazine framework supported molecular catalyst. CHEMSUSCHEM 2015; 8:809-812. [PMID: 25677344 DOI: 10.1002/cssc.201403173] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Indexed: 06/04/2023]
Abstract
A heterogeneous molecular catalyst based on Ir(III) Cp* (Cp*=pentamethylcyclopentadienyl) attached to a covalent triazine framework (CTF) is reported. It catalyses the production of hydrogen from formic acid with initial turnover frequencies (TOFs) up to 27,000 h(-1) and turnover numbers (TONs) of more than one million in continuous operation. The CTF support, with a Brunauer-Emmett-Teller (BET) surface area of 1800 m(2) g(-1), was constructed from an optimal 2:1 ratio of biphenyl and pyridine carbonitrile building blocks. Biphenyl building blocks induce mesoporosity and, therefore, facilitate diffusion of reactants and products whereas free pyridinic sites activate formic acid towards β-hydride elimination at the metal, rendering unprecedented rates in hydrogen production. The catalyst is air stable, produces CO-free hydrogen, and is fully recyclable. Hydrogen production rates of more than 60 mol L(-1) h(-1) were obtained at high catalyst loadings of 16 wt % Ir, making it attractive towards process intensification.
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Affiliation(s)
- A V Bavykina
- Catalysis Engineering-ChemE, Delft University of Technology, Julianalaan 136, 2628BL, Delft (The Netherlands)
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14
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Yin YY, Zhao YL, Ma JG, Cao XC, Cheng P. Synthesis and Chirality Control of Bulk Crystals and Nanocrystals: From a Right-Handed Nonpolar Chain to a Left-Handed Polar Chain. Inorg Chem 2013; 52:3738-43. [DOI: 10.1021/ic302711b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Yan-Yan Yin
- Department
of Chemistry, Key Laboratory of Advanced
Energy Material Chemistry (MOE) and TKL of Metal and Molecule Based
Material Chemistry, Nankai University,
Tianjin 300071, People’s Republic of China
| | - Yan-Li Zhao
- Department
of Chemistry, Key Laboratory of Advanced
Energy Material Chemistry (MOE) and TKL of Metal and Molecule Based
Material Chemistry, Nankai University,
Tianjin 300071, People’s Republic of China
| | - Jian-Gong Ma
- Department
of Chemistry, Key Laboratory of Advanced
Energy Material Chemistry (MOE) and TKL of Metal and Molecule Based
Material Chemistry, Nankai University,
Tianjin 300071, People’s Republic of China
| | - Xiao-Chang Cao
- Department
of Chemistry, Key Laboratory of Advanced
Energy Material Chemistry (MOE) and TKL of Metal and Molecule Based
Material Chemistry, Nankai University,
Tianjin 300071, People’s Republic of China
| | - Peng Cheng
- Department
of Chemistry, Key Laboratory of Advanced
Energy Material Chemistry (MOE) and TKL of Metal and Molecule Based
Material Chemistry, Nankai University,
Tianjin 300071, People’s Republic of China
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15
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A theoretical study on the red- and blue-shift hydrogen bonds of cis-trans formic acid dimer in excited states. OPEN CHEM 2013. [DOI: 10.2478/s11532-012-0143-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AbstractThe excited states of cis-trans formic acid dimer and its monomers have been investigated by time-dependent density functional theory (TDDFT) method. The formation of intermolecular hydrogen bonds O1-H1...O2=C2 and C2-H2...O4=C1 induces bond length lengthening of the groups related to the hydrogen bond, while that of the C2-H2 group is shortened. It is demonstrated that the red-shift hydrogen bond O1-H1...O2=C2 and blue-shift hydrogen bond C2-H2...O4=C1 are both weakened when excited to the S1 state. Moreover, it is found that the groups related to the formation of red-shift hydrogen bond O1-H1...O2=C2 are both strengthened in the S1 state, while the groups related to the blue-shift hydrogen bond C2-H2...O4=C1 are both weakened. This will provide information for the photochemistry and photophysical study of red- and blue-shift hydrogen bond.
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16
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Lifschitz AM, Rodgers JM, Samet C. Matrix and Polymer Soft-Landing Isolation of Selected Acids with Pyridine and Poly(4-vinylpyridine): A Comparative Infrared Spectroscopic Study of Hydrogen Bonding. J Phys Chem B 2011; 116:211-20. [DOI: 10.1021/jp2080012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Alejo M. Lifschitz
- Department of Chemistry, Dickinson College, Carlisle, Pennsylvania 17013, United States
| | - Jeffrey M. Rodgers
- Department of Chemistry, Dickinson College, Carlisle, Pennsylvania 17013, United States
| | - Cindy Samet
- Department of Chemistry, Dickinson College, Carlisle, Pennsylvania 17013, United States
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17
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LANKAU TIMM, WU YUCHUNG, ZOU JIANWEI, YU CHINHUI. THE COOPERATIVITY BETWEEN HYDROGEN AND HALOGEN BONDS. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2011. [DOI: 10.1142/s0219633608003563] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The cooperativity between hydrogen bonds and halogen bonds in X–HCN–Y ( X: C2H2, H2O, NH3, HCI, HCN, HF; Y: HF, BrF, Br2 is analyzed with MP2/6-311++G(d, p) and DFT/6-311++G(d, p) calculations using the B3LYP and mPW1PW91 hybrid functionals. The results from the quantum chemical calculations are typically clustered in groups according to the Y-ligand. By choosing the X–HCN–HF group as reference it is possible to describe the interaction between the hydrogen and the halogen bond with a two-parameter model. The value of the first parameter of the model describes the contribution of the X -ligand to the interbond cooperativity in the reference cluster. The second parameter of our model quantifies the changes in interbond cooperativity upon varying the Y -ligand. This simple model can be used to predict the cooperativity in X–HCN–Y trimers with reasonable accuracy and thereby to organize the results systematically. It is further shown that the conclusions drawn from this ordering scheme are independent from the computational method and thereby generally applicable.
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Affiliation(s)
- TIMM LANKAU
- Department of Chemistry, National Tsing Hua University, 101 Kuang Fu Road Sec. 2, Hsin Chu 30013, Taiwan
| | - YU-CHUNG WU
- Department of Chemistry, National Tsing Hua University, 101 Kuang Fu Road Sec. 2, Hsin Chu 30013, Taiwan
| | - JIAN-WEI ZOU
- Department of Chemistry, National Tsing Hua University, 101 Kuang Fu Road Sec. 2, Hsin Chu 30013, Taiwan
| | - CHIN-HUI YU
- Department of Chemistry, National Tsing Hua University, 101 Kuang Fu Road Sec. 2, Hsin Chu 30013, Taiwan
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18
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Chen YZ, Liu TY, Qu GN, Sun S, Gao SQ, Zhou M, Sun CL, Li ZW. Investigation of hydrogen bond in binary mixture (pyridine+propionic acid) by spectroscopy and DFT calculations. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2011.10.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Cimas Á, Mó O, Yáñez M, Martín N, Corral I. Hydrogen bonding in electronically excited states: a comparison between formic acid dimer and its mono-substituted thioderivatives. Phys Chem Chem Phys 2010; 12:13037-46. [DOI: 10.1039/c0cp00772b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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20
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Atorngitjawat P, Klein RJ, McDermott AG, Masser KA, Painter PC, Runt J. Dynamics of concentrated solutions of low molecular weight phenolics and poly(2-vinylpyridine): Role of intermolecular hydrogen bonding. POLYMER 2009. [DOI: 10.1016/j.polymer.2009.02.049] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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21
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Atorngitjawat P, Runt J. Ion Conduction and Polymer Dynamics of Poly(2-vinylpyridine)-Lithium Perchlorate Mixtures. J Phys Chem B 2007; 111:13483-90. [DOI: 10.1021/jp0734068] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pornpen Atorngitjawat
- Department of Materials Science and Engineering and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, and Department of Chemistry, Faculty of Science, Burapha University, Chonburi 20131, Thailand
| | - James Runt
- Department of Materials Science and Engineering and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, and Department of Chemistry, Faculty of Science, Burapha University, Chonburi 20131, Thailand
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Gündoğdu K, Bandaria J, Nydegger M, Rock W, Cheatum CM. Relaxation and anharmonic couplings of the O-H stretching vibration of asymmetric strongly hydrogen-bonded complexes. J Chem Phys 2007; 127:044501. [PMID: 17672701 DOI: 10.1063/1.2753840] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
We present infrared transient grating measurements of complexes of formic acid with pyridine and pyrazine at four excitation frequencies within the broad proton-stretching band. These experiments investigate the mechanism of the line broadening of the O-H stretching vibration. The transients show coherent oscillations that decay within a few hundred femtoseconds and population relaxation on two time scales. We fit the data using a simple model of three coupled oscillators that relax via sequential kinetics through an intermediate state. Based on this model, we conclude that the coherent oscillations result from superpositions of Fermi-resonance-coupled states involving formic acid overtone and combination states.
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Affiliation(s)
- Kenan Gündoğdu
- Chemistry Department, The University of Iowa, Iowa City, Iowa 52242, USA
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O'Neal KL, Geib S, Weber SG. Extraction of Pyridines into Fluorous Solvents Based on Hydrogen Bond Complex Formation with Carboxylic Acid Receptors. Anal Chem 2007; 79:3117-25. [PMID: 17375900 DOI: 10.1021/ac062287+] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A molecular receptor embedded in a 'poor-solvent' receiving phase, such as a fluorous phase, should offer the ideal medium for selective extraction and sensing. The limited solubility of most solutes in fluorous phases enhances selectivity by reducing the extraction of unwanted matrix components. Thus, receptor-doped fluorous phases may be ideal extraction media. Unfortunately, sufficient data do not exist to judge the capability of this approach. The solubilities of very few nonfluorous solutes are known. As far as we are aware, such important quantities as the strength of a hydrogen bond in a fluorous environment are not known. Thus, it is currently impossible to predict whether a particular receptor/solute complex based on a particular set of noncovalent interactions will provide enough thermodynamic stabilization to extract the solute into the fluorous phase. In this work, fluorous carboxylic acids (a carboxylic acid-terminated perfluoropolypropylene oxide called Krytox and perfluorodecanoic acid (PFDA)) were used as receptors and substituted pyridines as solutes to show that the fluorous receptor dramatically enhances the liquid-liquid extraction of the polar substrates from chloroform into perfluorohexanes. The method of continuous variations was used to determine the receptor-pyridine complex stoichiometry of 3:1. The free energies of formation of the 3:1 complexes from one pyridine and 3/2 H-bonded cyclic dimers of the fluorous carboxylic acid are -30.4 (Krytox) and -37.3 kJ mol-1 (PFDA). The free energy required to dissociate the dimer in perfluorohexanes is +16.5 kJ mol-1 (Krytox). The crystal structure of the complex showed a 1:1 stoichiometry with a mixed strong-weak hydrogen-bonded motif. Based on the stoichiometry, crystal structure, and UV and IR spectroscopic shifts, we propose that the 3:1 complex has four hydrogen bonds and the carboxylic acid transfers a proton to pyridine. The resulting pyridinium carboxylate N+H-O- hydrogen bond is accompanied by a weak pyridine ring CH-O bond and is supported by two more carboxylic acid H-bond donors. We estimate that the free energy of formation of this complex from a free acid, pyridine, and a carboxylic acid dimer to be approximately -39 kJ mol-1; this is the first reported hydrogen bond strength in a fluorous environment.
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Affiliation(s)
- Kristi L O'Neal
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260-3900, USA
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Balevicius V, Bariseviciute R, Aidas K, Svoboda I, Ehrenberg H, Fuess H. Proton transfer in hydrogen-bonded pyridine/acid systems: the role of higher aggregation. Phys Chem Chem Phys 2007; 9:3181-9. [PMID: 17612741 DOI: 10.1039/b701775h] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work the role of higher molecular aggregation in the proton transfer processes within hydrogen bond (H-bond) is investigated. The H-bonded complex consisting of 4-cyanopyridine (CyPy) with trichloroacetic acid (TCA) has been studied in the solutions of acetonitrile, carbon tetrachloride, chloroform and dichloroethane as solvent by FTIR spectroscopy and quantum chemical DFT calculations. In order to illustrate the effect of increasing H-bond strength FTIR investigations have also been performed on solutions of CyPy with H(2)O, acetic-, trifluoroacetic- and methanesulfonic acids. Proton states in the H-bond have been monitored using vibrational CyPy ring modes in FTIR spectra. The stabilization of the CyPy/TCA complex in its protonated form upon increasing polarity of the solvent has been evidenced. It was shown that formation of the CyPy/(TCA)(2) aggregates in the solutions favors the proton transfer process. An X-ray diffraction study has been performed on a single 1 : 2 co-crystal of pyridine/3,5-dinitrobenzoic acid. The H-bond motif found in this system exhibits the same connectivity by strong hydrogen bonds N-H(+)[dot dot dot]O(-) and O-H[dot dot dot]O as that in the CyPy/(TCA)(2) complex predicted by DFT calculation. Certain discrepancies are observed in C-H[dot dot dot]O connectivity only. The networks of H-bonds in both assemblies differ from those usually pictured for 1 : 2 base/carboxylic acid complexes in the literature.
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The interplay of hydrogen-bonding and metal-coordination motifs in the formation of supramolecular patterns: Copper/zinc malonates–aminopyrimidine complexes. INORG CHEM COMMUN 2006. [DOI: 10.1016/j.inoche.2006.07.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Zhai G. pH- and temperature-sensitive microfiltration membranes from blends of poly(vinylidene fluoride)-graft-poly(4-vinylpyridine) and poly(N-isopropylacrylamide). J Appl Polym Sci 2006. [DOI: 10.1002/app.23286] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Sicilia MC, Niño A, Muñoz-Caro C. Mechanism of Pyridine Protonation in Water Clusters of Increasing Size. J Phys Chem A 2005; 109:8341-7. [PMID: 16834225 DOI: 10.1021/jp050530n] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This work presents a theoretical mechanistic study of the protonation of pyridine in water clusters, at the B3LYP/cc-pVDZ theory level. Clusters from one to five water molecules were used. Starting from previously determined structures, the reaction paths for the protonation process were identified. For complexes of pyridine with water clusters of up to three water molecules just one transition state (TS) links the solvated and protonated forms. It is found that the activation energy decreases with the number of water molecules. For complexes of four and five water molecules two transition states are found. For four water molecules, the first TS links the starting solvated structure with a new, less stable, solvated form through a concerted proton transfer between a ring of water molecules. The second TS links the new solvated structure to the protonated form. Thus, protonation is a two-step process. For the five water molecules cluster, the new solvated structure is more stable than the starting one. This structure exhibits two double hydrogen bonds involving the pyridinic nitrogen and several water molecules. The second TS links the new structure with the protonated form. Now the process occurs in one step. In all cases considered, the proton transfers involve an interconversion between covalent and hydrogen bonds. For four and five water molecules, the second TS is structurally and energetically very close to the protonated form. As evidenced by the vibration frequencies, this is due to a flat potential energy hypersurface in the direction of the reaction coordinate. Determination of DeltaG at 298.15 K and 1 atm shows that the protonation of pyridine needs at least four water molecules to be spontaneous. The complex with five water molecules exhibits a large DeltaG. This value yields a pKa of 2.35, relatively close to the reported 5.21 for pyridine in water.
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Affiliation(s)
- M Carmen Sicilia
- Grupo de Química Computacional y Computación de Alto Rendimiento (QCyCAR), E. S. Informatica, Universidad de Castilla-La Mancha, Paseo de la Universidad, 4. 13071 Ciudad Real, Spain
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Choi HJ, Park YS, Song J, Youn SJ, Kim HS, Kim SH, Koh K, Paek K. Structural Properties of Benzimidazole Cavitand and Its Selective Recognition toward 4-Methylbenzamide over 4-Methylanilide. J Org Chem 2005; 70:5974-81. [PMID: 16018693 DOI: 10.1021/jo0506478] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The conformations and properties of cavitand 5 with four benzimidazole flaps are studied by (1)H NMR. The benzimidazole cavitand 5 can form very stable vase structures with an enforced concave cavity by intermolecular hydrogen bonding with four hydroxyl-containing molecules, X-OH, such as methanol (X = Me), acetic acid (X = CH(3)CO), and trifluoroacetic acid (X = CF(3)CO). The stronger hydrogen bond donor strengths of X-OH are, the stronger hydrogen bonds are formed between the NH and N atoms of the neighboring benzimidazole fragments and the more vase structures of 5.4HOX are stable. The annular tautomerism of 5 in CDCl(3)/CD(3)OD (9:1, v/v) due to the proton exchange between NH and N atoms of the neighboring benzimidazole fragments is observed by 400 MHz (1)H NMR, and the free energy of activation is measured as DeltaG++(210) = 10.2 kcal/mol at a coalescence temperature of 210 K. Cavitand 5 forms inclusion complexes with 4-methylbezamide guests such as 4-methyl-N-p-tolylbenzamide 6 and N,4-dimethylbenzamide 7 in water-saturated CDCl(3). However, an isomorphic 4-methylanilide guest such as N-4-tolylacetamide 8 cannot be recognized in the concave cavity of 5. This high selectivity toward 4-methylbenzamide over 4-methylanilide seems attributable to the hydrogen-binding interaction between the NH proton of 4-methylbezamide guest 7 and the oxygen atom of the closest water molecule.
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Affiliation(s)
- Heung-Jin Choi
- Department of Applied Chemistry, Kyungpook National University, Daegu 702-701, Korea.
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30
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Structures and interactions in N-methylacetamide-water mixtures studied by IR spectra and density functional theory. J Mol Struct 2004. [DOI: 10.1016/j.molstruc.2004.01.035] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Nishiyama S, Tajima M, Yoshida Y. Luminescence and Absorption Spectra of Poly(4-vinylpyridine) Thin Films and Their Surface Modification. J PHOTOPOLYM SCI TEC 2004. [DOI: 10.2494/photopolymer.17.87] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wu DY, Ren B, Xu X, Liu GK, Yang ZL, Tian ZQ. Periodic trends in the bonding and vibrational coupling: Pyridine interacting with transition metals and noble metals studied by surface-enhanced Raman spectroscopy and density-functional theory. J Chem Phys 2003. [DOI: 10.1063/1.1580102] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Nishiyama S, Tajima M, Yoshida Y. Chemical Modification and Luminescence Measurement of Nitrogen-containing Polymer Surface. J PHOTOPOLYM SCI TEC 2003. [DOI: 10.2494/photopolymer.16.173] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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