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Spange S, Seifert A. Solvatochromism in Mixtures of Hydrogen Bond Acceptor (HBA) Solvents with Water. Chemphyschem 2024:e202400077. [PMID: 38709643 DOI: 10.1002/cphc.202400077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/27/2024] [Indexed: 05/08/2024]
Abstract
The UV/Vis absorption energies νmax of Reichardt's dye B30 with respect to ET(30) and 4-nitroaniline (NA) are investigated as a function of the solvent composition Nav,z. in co-solvent/water mixtures. Nav,z. is the average molar concentration of the solvent mixture at a given solvent fraction z. The z can be the mole, the volume or the mass fraction. The co-solvents considered were acetonitrile, acetone, tetrahydrofuran, pyridine, piperidine and 2-(diethylamino)-ethanol. Acetone and acetonitrile can be expected to slightly enhance the water structure at low co-solvent concentrations. This interpretation is supported by the analysis of the refractive index as a function of the solvent composition. In general, it can be stated that the structural complexity of the binary solvent mixtures is mainly responsible for the evolution of the absorption energies ET(30) or νmax(NA) as a function of the mixture composition. In particular, the endothermic solvation of NA in co-solvent/water mixtures and its effect on the νmax(NA) is highlighted.
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Affiliation(s)
- Stefan Spange
- Department of Polymer Chemistry, Institute of Chemistry, University of Technology Chemnitz, Straße der Nationen 62, 09111, Chemnitz, Germany
| | - Andreas Seifert
- Department of Polymer Chemistry, Institute of Chemistry, University of Technology Chemnitz, Straße der Nationen 62, 09111, Chemnitz, Germany
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2
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Huang CI, Feng JY, Lee YP, Ebata T. Structures and Anharmonic Analyses of the O-H Stretching Vibrations of Jet-Cooled Benzoic Acid (BA), (BA)(H 2O) n, and (BA) 2(H 2O) n ( n = 1, 2) Clusters, and Their Ring-Deuterated Isotopologues Measured with IR-VUV Spectroscopy─Unraveling the Complex Anharmonic Couplings in the Cyclic Structures. J Phys Chem A 2023; 127:9550-9563. [PMID: 37930654 DOI: 10.1021/acs.jpca.3c06581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2023]
Abstract
The IR spectra of benzoic acid (BA), (BA)(H2O)n and (BA)2(H2O)n (n = 1, 2) clusters, and their ring-deuterated isotopologues in the 2800-3750 cm-1 region were measured with IR-vacuum ultraviolet spectroscopy under the jet-cooled condition. For (BA)(H2O) and (BA)(H2O)2, only a single isomer was observed for each species, whereas for (BA)2(H2O) and (BA)2(H2O)2, more than one isomers were present. The observed IR spectra were very complex and showed similar structures between (BA)m(H2O)n and their ring-deuterated isotopologues (BA-d5)m(H2O)n for specific values of m and n. The anharmonic analysis based on the vibrational second-order perturbation theory indicated that the complexity of the IR spectra in these clusters was due to the appearance of many bands of (i) the overtone and combination modes involving the O-H bend of H2O and the in-plane C-O-H bends and the C═O stretch of BA, and (ii) the combination modes involving the hydrogen-bonded O-H stretch and low-frequency intermolecular vibrations, with considerable intensities.
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Affiliation(s)
- Chia-I Huang
- Department of Applied Chemistry and Institute of Molecular Science, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan
| | - Jun-Ying Feng
- Department of Applied Chemistry and Institute of Molecular Science, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan
| | - Yuan-Pern Lee
- Department of Applied Chemistry and Institute of Molecular Science, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan
- Center for Emergent Functional Matter Science, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan
| | - Takayuki Ebata
- Department of Applied Chemistry and Institute of Molecular Science, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan
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3
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Feng JY, Lee YP, Hsu PJ, Kuo JL, Ebata T. Structures of (Pyrazine) 2 and (Pyrazine)(Benzene) Dimers Investigated with Infrared-Vacuum Ultraviolet Spectroscopy and Quantum-Chemical Calculations: Competition among π-π, CH···π, and CH···N Interactions. J Phys Chem A 2023; 127:4291-4301. [PMID: 37145887 DOI: 10.1021/acs.jpca.3c01767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The structures of a pyrazine dimer (pyrazine)2 and (pyrazine)(benzene) hetero-dimer cooled in a supersonic beam were investigated by the measurement of the infrared spectra in the C-H stretching region with infrared-vacuum ultraviolet (IR-VUV) spectroscopy and quantum-chemical calculations. The stabilization energy calculation at the CCSD(T)/aug-cc-pVTZ level of theory predicted three isomers for (pyrazine)2 and three for (pyrazine)(benzene) with energy within 6 kJ/mol. Among them, the cross-displaced π-π stacked structure is the most stable in both dimers. In the observed IR spectra, both dimers exhibited two intense bands near 3065 cm-1, with intervals of 8 cm-1 in (pyrazine)2 and 11 cm-1 in (pyrazine)(benzene), while only one band appeared in the monomer. For (pyrazine)(benzene), we also measured the IR spectrum of (pyrazine)(benzene-d6), where the interval of the two bands was unchanged. The analysis of the observed IR spectra with anharmonic calculations suggested the coexistence of three isomers of (pyrazine)2 and (pyrazine)(benzene) in a supersonic jet. For (pyrazine)2, the two isomers which were previously assigned to the H-bonded planar and the π-π stacked structures respectively were reassigned to the cross-displaced π-π stacked and T-shaped structures, respectively. In addition, the quantum chemical calculation and IR-VUV spectral measurement suggested the coexistence of the H-bonded planar isomer in the jet. For (pyrazine)(benzene), the IR spectrum of the (pyrazine) site showed a similar spectral pattern to that of (pyrazine)2, especially the split at ∼3065 cm-1. However, the anharmonic analysis suggested that they are assigned to the different vibrational motions of (pyrazine). The anharmonic vibrational analysis is essential to associate the observed IR spectra with the correct structures of the dimer.
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Affiliation(s)
- Jun-Ying Feng
- Department of Applied Chemistry and Institute for Molecular Science, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan
| | - Yuan-Pern Lee
- Department of Applied Chemistry and Institute for Molecular Science, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan
- Center for Emergent Functional Matter Sciences, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan
| | - Po-Jen Hsu
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106319, Taiwan
| | - Jer-Lai Kuo
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106319, Taiwan
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
- International Graduate Program of Molecular Science and Technology (NTU-MST), National Taiwan University, Taipei 10617 Taiwan
| | - Takayuki Ebata
- Department of Applied Chemistry and Institute for Molecular Science, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan
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4
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Kou M, Wang Y, Xu Y, Ye L, Huang Y, Jia B, Li H, Ren J, Deng Y, Chen J, Zhou Y, Lei K, Wang L, Liu W, Huang H, Ma T. Molecularly Engineered Covalent Organic Frameworks for Hydrogen Peroxide Photosynthesis. Angew Chem Int Ed Engl 2022; 61:e202200413. [PMID: 35166425 PMCID: PMC9305556 DOI: 10.1002/anie.202200413] [Citation(s) in RCA: 97] [Impact Index Per Article: 48.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Indexed: 01/24/2023]
Abstract
Synthesizing H2 O2 from water and air via a photocatalytic approach is ideal for efficient production of this chemical at small-scale. However, the poor activity and selectivity of the 2 e- water oxidation reaction (WOR) greatly restricts the efficiency of photocatalytic H2 O2 production. Herein we prepare a bipyridine-based covalent organic framework photocatalyst (denoted as COF-TfpBpy) for H2 O2 production from water and air. The solar-to-chemical conversion (SCC) efficiency at 298 K and 333 K is 0.57 % and 1.08 %, respectively, which are higher than the current reported highest value. The resulting H2 O2 solution is capable of degrading pollutants. A mechanistic study revealed that the excellent photocatalytic activity of COF-TfpBpy is due to the protonation of bipyridine monomer, which promotes the rate-determining reaction (2 e- WOR) and then enhances Yeager-type oxygen adsorption to accelerate 2 e- one-step oxygen reduction. This work demonstrates, for the first time, the COF-catalyzed photosynthesis of H2 O2 from water and air; and paves the way for wastewater treatment using photocatalytic H2 O2 solution.
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Affiliation(s)
- Mingpu Kou
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, 443002, China
| | - Yongye Wang
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, 443002, China
| | - Yixue Xu
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, 443002, China.,Hubei Three Gorges Laboratory, 443007, Yichang, China
| | - Liqun Ye
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, 443002, China.,Hubei Three Gorges Laboratory, 443007, Yichang, China
| | - Yingping Huang
- Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Yichang, 443002, China
| | - Baohua Jia
- Centre for Translational Atomaterials, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.,School of Science, RMIT University, Melbourne, VIC 3000, Australia
| | - Hui Li
- Centre for Translational Atomaterials, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.,School of Science, RMIT University, Melbourne, VIC 3000, Australia
| | - Jiaqi Ren
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, 443002, China
| | - Yu Deng
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, 443002, China
| | - Jiahao Chen
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, School of Oil & Natural Gas Engineering, Southwest Petroleum University, 610500, Chengdu, China
| | - Ying Zhou
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, School of Oil & Natural Gas Engineering, Southwest Petroleum University, 610500, Chengdu, China
| | - Kai Lei
- Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, Wuhan National Laboratory for Optoelectronics, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Luoyu Road, Wuhan, 430074, China
| | - Li Wang
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, 443002, China
| | - Wei Liu
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, 443002, China.,Hubei Three Gorges Laboratory, 443007, Yichang, China
| | - Hongwei Huang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, School of Materials Science and Technology, China University of Geosciences, Beijing, 100083, P. R. China
| | - Tianyi Ma
- Centre for Translational Atomaterials, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.,School of Science, RMIT University, Melbourne, VIC 3000, Australia
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5
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Kou M, Wang Y, Xu Y, Ye L, Huang Y, Jia B, Li H, Ren J, Deng Y, Chen J, Zhou Y, Lei K, Wang L, Liu W, Huang H, Ma T. Molecularly Engineered Covalent Organic Frameworks for Hydrogen Peroxide Photosynthesis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Mingpu Kou
- College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Yichang 443002 China
| | - Yongye Wang
- College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Yichang 443002 China
| | - Yixue Xu
- College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Yichang 443002 China
- Hubei Three Gorges Laboratory 443007 Yichang China
| | - Liqun Ye
- College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Yichang 443002 China
- Hubei Three Gorges Laboratory 443007 Yichang China
| | - Yingping Huang
- Engineering Research Center of Eco-environment in Three Gorges Reservoir Region Ministry of Education China Three Gorges University Yichang 443002 China
| | - Baohua Jia
- Centre for Translational Atomaterials Swinburne University of Technology Hawthorn VIC 3122 Australia
- School of Science RMIT University Melbourne VIC 3000 Australia
| | - Hui Li
- Centre for Translational Atomaterials Swinburne University of Technology Hawthorn VIC 3122 Australia
- School of Science RMIT University Melbourne VIC 3000 Australia
| | - Jiaqi Ren
- College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Yichang 443002 China
| | - Yu Deng
- College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Yichang 443002 China
| | - Jiahao Chen
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation School of Oil & Natural Gas Engineering Southwest Petroleum University 610500 Chengdu China
| | - Ying Zhou
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation School of Oil & Natural Gas Engineering Southwest Petroleum University 610500 Chengdu China
| | - Kai Lei
- Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service Failure Wuhan National Laboratory for Optoelectronics School of Chemistry and Chemical Engineering Huazhong University of Science and Technology (HUST) Luoyu Road Wuhan 430074 China
| | - Li Wang
- College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Yichang 443002 China
| | - Wei Liu
- College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Yichang 443002 China
- Hubei Three Gorges Laboratory 443007 Yichang China
| | - Hongwei Huang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes School of Materials Science and Technology China University of Geosciences Beijing 100083 P. R. China
| | - Tianyi Ma
- Centre for Translational Atomaterials Swinburne University of Technology Hawthorn VIC 3122 Australia
- School of Science RMIT University Melbourne VIC 3000 Australia
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