1
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Kim J, Woo KC, Kang M, Kim SK. Dynamic Role of the Intramolecular Hydrogen Bonding in the S 1 State Relaxation Dynamics Revealed by the Direct Measurement of the Mode-Dependent Internal Conversion Rate of 2-Chlorophenol and 2-Chlorothiophenol. J Phys Chem Lett 2023; 14:8428-8436. [PMID: 37712655 DOI: 10.1021/acs.jpclett.3c02208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
The dynamic role of the intramolecular hydrogen bond in the S1 relaxation of cis-2-chlorophenol (2-CP) or cis-2-chlorothiophenol (2-CTP) has been investigated in a state-specific manner. Whereas ultrafast internal conversion is dominant for 2-CP, the H-tunneling competes with internal conversion for 2-CTP even at the S1 origin. The S0-S1 internal conversion rate of 2-CTP could be directly measured from the S1 lifetimes of 2-CTP-d1 (Cl-C6H4-SD) as the D-tunneling is kinetically blocked, allowing distinct estimations of tunneling and internal conversion rates with increasing the energy. The internal conversion rate of 2-CTP increases by two times at the out-of-plane torsional mode excitation, suggesting that the internal conversion is facilitated at the nonplanar geometry. It then sharply increases at ∼600 cm-1, indicating that the S1/S0 conical intersection is readily accessible at the extended C-Cl bond length. The strength of the intramolecular hydrogen bond should be responsible for the distinct dynamic behaviors of 2-CP and 2-CTP.
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Affiliation(s)
- Junggil Kim
- Department of Chemistry, KAIST, Daejeon 34141, Republic of Korea
| | - Kyung Chul Woo
- Department of Chemistry, KAIST, Daejeon 34141, Republic of Korea
| | - Minseok Kang
- Department of Chemistry, KAIST, Daejeon 34141, Republic of Korea
| | - Sang Kyu Kim
- Department of Chemistry, KAIST, Daejeon 34141, Republic of Korea
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2
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Knoor LH, Hoogewerf LP, Jonker IB, Doty EA, Du Laney GR, Blankespoor RL, Muyskens MA. Spectral properties and modeling of knightletin, a novel aminocoumarin with intramolecular hydrogen bonding. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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3
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Redox-active ligands for chemical, electrochemical, and photochemical molecular conversions. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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4
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Kim J, Woo KC, Kim KK, Kang M, Kim SK. Tunneling dynamics dictated by the multidimensional conical intersection seam in the πσ*‐mediated photochemistry of heteroaromatic molecules. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Junggil Kim
- Department of Chemistry, KAIST Daejeon Republic of Korea
| | - Kyung Chul Woo
- Department of Chemistry, KAIST Daejeon Republic of Korea
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences Nanyang Technological University Singapore Singapore
| | - Kuk Ki Kim
- Department of Chemistry, KAIST Daejeon Republic of Korea
| | - Minseok Kang
- Department of Chemistry, KAIST Daejeon Republic of Korea
| | - Sang Kyu Kim
- Department of Chemistry, KAIST Daejeon Republic of Korea
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5
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Abe K, Nakada A, Matsumoto T, Uchijyo D, Mori H, Chang HC. Functional Group-Directed Photochemical Reactions of Aromatic Alcohols, Amines, and Thiols Triggered by Excited-State Hydrogen Detachment: Additive-free Oligomerization, Disulfidation, and C(sp 2)-H Carboxylation with CO 2. J Org Chem 2021; 86:959-969. [PMID: 33211498 DOI: 10.1021/acs.joc.0c02456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Exploring new types of photochemical reactions is of great interest in the field of synthetic chemistry. Although excited-state hydrogen detachment (ESHD) represents a promising prospective template for additive-free photochemical reactions, applications of ESHD in a synthetic context remains scarce. Herein, we demonstrate the expansion of this photochemical reaction toward oligomerization, disulfidation, and regioselective C(sp2)-H carboxylation of aromatic alcohols, thiols, and amines. In the absence of any radical initiators in tetrahydrofuran upon irradiation with UV light (λ = 280 or 300 nm) under an atmosphere of N2 or CO2, thiols and catechol afforded disulfides and oligomers, respectively, as main products. Especially, the photochemical disulfidation proceeded highly selectively with the NMR and quantum yields of up to 69 and 0.46%, respectively. In stark contrast, the photolysis of phenylenediamines and aminophenols results in photocarboxylation in the presence of CO2 (1 atm). p-Aminophenol was quantitatively carboxylated by photolysis for 17 h with a quantum yield of 0.45%. Furthermore, the photocarboxylation of phenylenediamines and aminophenols proceeds in a highly selective fashion on the aromatic C(sp2)-H bond next to a functional group, which is directed by the site-selective ESHD of the functional groups for the formation of aminyl and hydroxyl radicals.
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Affiliation(s)
- Kanae Abe
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Akinobu Nakada
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan.,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Takeshi Matsumoto
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan.,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Daiki Uchijyo
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
| | - Hirotoshi Mori
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan.,Department of Theoretical and Computational Molecular Science, Institute for Molecular Science, Okazaki 444-8585, Japan
| | - Ho-Chol Chang
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan
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6
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Nakada A, Koike T, Matsumoto T, Chang HC. Excited-state hydrogen detachment from a tris-(o-phenylenediamine) iron(ii) complex in THF at room temperature. Chem Commun (Camb) 2020; 56:15414-15417. [PMID: 33284915 DOI: 10.1039/d0cc06219g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We previously reported that a tris-(o-phenylenediamine) iron(ii) complex promotes photochemical H2 generation and C-H carboxylation of o-phenylenediamine without any additives under N2 and CO2 atmospheres, respectively, in tetrahydrofuran at room temperature. Herein, the key mechanistic process, namely, excited-state hydrogen detachment from the o-phenylendiamine moiety, is demonstrated under an N2 atmosphere.
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Affiliation(s)
- Akinobu Nakada
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan.
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7
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Woo KC, Kim SK. Real-Time Tunneling Dynamics through Adiabatic Potential Energy Surfaces Shaped by a Conical Intersection. J Phys Chem Lett 2020; 11:6730-6736. [PMID: 32787219 DOI: 10.1021/acs.jpclett.0c01892] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Dynamic shaping of the adiabatic tunneling barrier in the S-H bond extension coordinate of several ortho-substituted thiophenols has been found to be mediated by low-frequency out-of-plane vibrational modes, which are parallel to the coupling vector of the branching plane comprising the conical intersection. The S-H predissociation tunneling rate (k) measured when exciting to the S1 zero-point level of 2-methoxythiophenol (44 ps)-1 increases abruptly, to k ≈ (22 ps)-1, at the energy corresponding to excitation of the 152 cm-1 out-of-plane vibrational mode and then falls back to k ≈ (40 ps)-1 when the in-plane mode is excited at 282 cm-1. Similar resonance-like peaks in plots of S1 tunneling rate versus internal energy are observed when exciting the corresponding low-frequency out-of-plane modes in the S1 states of 2-fluorothiophenol and 2-chlorothiophenol. This experiment provides clear-cut evidence for dynamical "shaping" of the lower-lying adiabatic potential energy surfaces by the higher-lying conical intersection seam, which dictates the multidimensional tunneling dynamics.
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Affiliation(s)
- Kyung Chul Woo
- Department of Chemistry, KAIST, Daejeon 34141, Republic of Korea
| | - Sang Kyu Kim
- Department of Chemistry, KAIST, Daejeon 34141, Republic of Korea
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8
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Lim JS, You HS, Kim SY, Kim SK. Experimental observation of nonadiabatic bifurcation dynamics at resonances in the continuum. Chem Sci 2019; 10:2404-2412. [PMID: 30881669 PMCID: PMC6385646 DOI: 10.1039/c8sc04859b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 01/04/2019] [Indexed: 11/23/2022] Open
Abstract
In the strong vibronic state mixing regime, both Herzberg type-I and type-II predissociations coexist and proceed in a competitive way.
The surface crossing of bound and unbound electronic states in multidimensional space often gives rise to resonances in the continuum. This situation happens in the πσ*-mediated photodissociation reaction of 2-fluorothioanisole; optically-bright bound S1 (ππ*) vibrational states of 2-fluorothioanisole are strongly coupled to the optically-dark S2 (πσ*) state, which is repulsive along the S–CH3 elongation coordinate. It is revealed here that the reactive flux prepared at such resonances in the continuum bifurcates into two distinct reaction pathways with totally different dynamics in terms of energy disposal and nonadiabatic transition probability. This indicates that the reactive flux in the Franck–Condon region may either undergo nonadiabatic transition funneling through the conical intersection from the upper adiabat, or follow a low-lying adiabatic path, along which multiple dynamic saddle points may be located. Since 2-fluorothioanisole adopts a nonplanar geometry in the S1 minimum energy, the quasi-degenerate S1/S2 crossing seam in the nonplanar geometry, which lies well below the planar S1/S2 conical intersection, is likely responsible for the efficient vibronic coupling, especially in the low S1 internal energy region. As the excitation energy increases, bound-to-continuum coupling is facilitated with the aid of intramolecular vibrational redistribution, along many degrees of freedom spanning the large structural volume. This leads to the rapid domination of the continuum character of the reactive flux. This work reports direct and robust experimental observations of the nonadiabatic bifurcation dynamics of the reactive flux occurring at resonances in the continuum of polyatomic molecules.
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Affiliation(s)
- Jean Sun Lim
- Department of Chemistry , KAIST , Daejeon 34141 , Republic of Korea .
| | - Hyun Sik You
- Department of Chemistry , KAIST , Daejeon 34141 , Republic of Korea .
| | - So-Yeon Kim
- Department of Chemistry , KAIST , Daejeon 34141 , Republic of Korea .
| | - Sang Kyu Kim
- Department of Chemistry , KAIST , Daejeon 34141 , Republic of Korea .
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9
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Miyazaki M, Washio N, Fujii M. Electron-proton transfer mechanism of excited-state hydrogen transfer in phenol−(NH3) (n = 5) studied by delayed ionization detected femtosecond time-resolved NIR spectroscopy. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.08.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Lin GSM, Xie C, Xie D. Nonadiabatic Effect in Photodissociation Dynamics of Thiophenol via the 1ππ* State. J Phys Chem A 2018; 122:5375-5382. [DOI: 10.1021/acs.jpca.8b03460] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Guang-Shuang-Mu Lin
- Institute of Theoretical and Computational Chemistry, Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Changjian Xie
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Daiqian Xie
- Institute of Theoretical and Computational Chemistry, Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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11
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Capello MC, Hernández FJ, Broquier M, Dedonder-Lardeux C, Jouvet C, Pino GA. Hydrogen bonds vs. π-stacking interactions in the p-aminophenolp-cresol dimer: an experimental and theoretical study. Phys Chem Chem Phys 2018; 18:31260-31267. [PMID: 27819104 DOI: 10.1039/c6cp06352g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The gas phase structure and excited state lifetime of the p-aminophenolp-cresol heterodimer have been investigated by REMPI and LIF spectroscopy with nanosecond laser pulses and pump-probe experiments with picosecond laser pulses as a model system to study the competition between π-π and H-bonding interactions in aromatic dimers. The excitation is a broad and unstructured band. The excited state of the heterodimer is long lived (2.5 ± 0.5) ns with a very broad fluorescence spectrum red-shifted by 4000 cm-1 with respect to the excitation spectrum. Calculations at the MP2/RI-CC2 and DFT-ωB97X-D levels indicate that hydrogen-bonded (HB) and π-stacked isomers are almost isoenergetic in the ground state while in the excited state only the π-stacked isomer exists. This suggests that the HB isomer cannot be excited due to negligible Franck-Condon factors and therefore the excitation spectrum is associated with the π-stacked isomer that reaches vibrationally excited states in the S1 state upon vertical excitation. The excited state structure is an exciplex responsible for the fluorescence of the complex. Finally, a comparison was performed between the π-stacked structure observed for the p-aminophenolp-cresol heterodimer and the HB structure reported for the (p-cresol)2 homodimer indicating that the differences are due to different optical properties (oscillator strengths and Franck-Condon factors) of the isomers of both dimers and not to the interactions involved in the ground state.
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Affiliation(s)
- M C Capello
- Instituto de Investigaciones en Físico Química de Córdoba (INFIQC) CONICET - UNC. Dpto. de Fisicoquímica - Facultad de Ciencias Químicas - Centro Láser de Ciencias Moleculares - Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Argentina.
| | - F J Hernández
- Instituto de Investigaciones en Físico Química de Córdoba (INFIQC) CONICET - UNC. Dpto. de Fisicoquímica - Facultad de Ciencias Químicas - Centro Láser de Ciencias Moleculares - Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Argentina.
| | - M Broquier
- Centre Laser de l'Université Paris Sud (CLUPS/LUMAT), Univ. Paris-Sud, CNRS, Institut d'Optique Graduate School, Univ. Paris-Saclay, F-91405 Orsay, France and Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Univ. Paris-Sud, Univ. Paris-Saclay, F-91405 Orsay, France
| | | | - C Jouvet
- Aix Marseille Université, CNRS, PIIM UMR 7345, Marseille, 13397, France
| | - G A Pino
- Instituto de Investigaciones en Físico Química de Córdoba (INFIQC) CONICET - UNC. Dpto. de Fisicoquímica - Facultad de Ciencias Químicas - Centro Láser de Ciencias Moleculares - Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Argentina.
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12
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Two-color resonance enhanced multi-photon ionization and mass analyzed threshold ionization spectroscopy of 2-aminobenzonitrile and the CN substitution effect. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2017.12.073] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Abstract
The response of nucleobases to UV radiation depends on structure in subtle ways, as revealed by gas-phase experiments.
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Affiliation(s)
- Samuel Boldissar
- Department of Chemistry and Biochemistry University of California Santa Barbara
- USA
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14
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Miyazaki M, Ohara R, Dedonder C, Jouvet C, Fujii M. Electron-Proton Transfer Mechanism of Excited-State Hydrogen Transfer in Phenol-(NH 3 ) n (n=3 and 5). Chemistry 2017; 24:881-890. [PMID: 29032637 DOI: 10.1002/chem.201704129] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Indexed: 11/11/2022]
Abstract
Excited-state hydrogen transfer (ESHT) is responsible for various photochemical processes of aromatics, including photoprotection of nuclear basis. Its mechanism is explained by internal conversion from the aromatic ππ* to πσ* states via conical intersection. This means that the electron is transferred to a diffuse Rydberg-like σ* orbital apart from proton migration. This picture means the electron and the proton do not move together and the dynamics are different in principle. Here, we have applied picosecond time-resolved near-infrared (NIR) and infrared (IR) spectroscopy to the phenol-(NH3 )5 cluster, the benchmark system of ESHT, and monitored the electron transfer and proton motion independently. The electron transfer monitored by the NIR transition rises within 3 ps, while the overall H transfer detected by the IR absorption of NH vibration appears with a lifetime of about 20 ps. This clearly proves that the electron motion and proton migration are decoupled. Such a difference of the time-evolutions between the NIR absorption and the IR transition has not been detected in a cluster with three ammonia molecules. We will report our full observation together with theoretical calculations of the potential energy surfaces of the ππ* and πσ* states, and will discuss the ESHT mechanism and its cluster size-dependence between n=3 and 5. It is suggested that the presence and absence of a barrier in the proton transfer coordinate cause the different dynamics.
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Affiliation(s)
- Mitsuhiko Miyazaki
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, R1-15, 4259, Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan
| | - Ryuhei Ohara
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, R1-15, 4259, Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan
| | - Claude Dedonder
- CNRS, Physique des Interactions Ioniques et Moleculaires, Aix Marseille Université, (PIIM) UMR 7345, 13397, Marseille cedex, France
| | - Christophe Jouvet
- CNRS, Physique des Interactions Ioniques et Moleculaires, Aix Marseille Université, (PIIM) UMR 7345, 13397, Marseille cedex, France
| | - Masaaki Fujii
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, R1-15, 4259, Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan
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15
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Dehydrogenation of anhydrous methanol at room temperature by o-aminophenol-based photocatalysts. Nat Commun 2016; 7:12333. [PMID: 27457731 PMCID: PMC4963534 DOI: 10.1038/ncomms12333] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 06/22/2016] [Indexed: 12/21/2022] Open
Abstract
Dehydrogenation of anhydrous methanol is of great importance, given its ubiquity as an intermediate for the production of a large number of industrial chemicals. Since dehydrogenation of methanol is an endothermic reaction, heterogeneous or homogeneous precious-metal-based catalysts and high temperatures are usually required for this reaction to proceed. Here we report the photochemical dehydrogenation of anhydrous methanol at room temperature catalysed by o-aminophenol (apH2), o-aminophenolate (apH(-)) and the non-precious metal complex trans-[Fe(II)(apH)2(MeOH)2]. Under excitation at 289±10 nm and in the absence of additional photosensitizers, these photocatalysts generate hydrogen and formaldehyde from anhydrous methanol with external quantum yields of 2.9±0.15%, 3.7±0.19% and 4.8±0.24%, respectively, which are the highest values reported so far to the best of our knowledge. Mechanistic investigations reveal that the photo-induced formation of hydrogen radicals triggers the reaction.
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16
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Yatsyna V, Bakker DJ, Feifel R, Rijs AM, Zhaunerchyk V. Aminophenol isomers unraveled by conformer-specific far-IR action spectroscopy. Phys Chem Chem Phys 2016; 18:6275-83. [DOI: 10.1039/c5cp07426f] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Far-infrared action spectroscopy of aminophenol in the gas-phase revealed isomer- and conformer-specific vibrational signatures and provided the heights of NH2 inversion barrier.
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Affiliation(s)
- Vasyl Yatsyna
- University of Gothenburg
- Department of Physics
- 412 96 Gotheburg
- Sweden
- Radboud University
| | - Daniël J. Bakker
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525 ED Nijmegen
- The Netherlands
| | - Raimund Feifel
- University of Gothenburg
- Department of Physics
- 412 96 Gotheburg
- Sweden
| | - Anouk M. Rijs
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525 ED Nijmegen
- The Netherlands
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17
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Hernández FJ, Capello MC, Naito A, Manita S, Tsukada K, Miyazaki M, Fujii M, Broquier M, Gregoire G, Dedonder-Lardeux C, Jouvet C, Pino GA. Trapped Hydronium Radical Produced by Ultraviolet Excitation of Substituted Aromatic Molecule. J Phys Chem A 2015; 119:12730-5. [PMID: 26637013 DOI: 10.1021/acs.jpca.5b10142] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The gas phase structure and excited state dynamics of o-aminophenol-H2O complex have been investigated using REMPI, IR-UV hole-burning spectroscopy, and pump-probe experiments with picoseconds laser pulses. The IR-UV spectroscopy indicates that the isomer responsible for the excitation spectrum corresponds to an orientation of the OH bond away from the NH2 group. The water molecule acts as H-bond acceptor of the OH group of the chromophore. The complexation of o-aminophenol with one water molecule induced an enhancement in the excited state lifetime on the band origin. The variation of the excited state lifetime of the complex with the excess energy from 1.4 ± 0.1 ns for the 0-0 band to 0.24 ± 0.3 ns for the band at 0-0 + 120 cm(-1) is very similar to the variation observed in the phenol-NH3 system. This experimental result suggests that the excited state hydrogen transfer reaction is the dominant channel for the non radiative pathway. Indeed, excited state ab initio calculations demonstrate that H transfer leading to the formation of the H3O(•) radical within the complex is the main reactive pathway.
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Affiliation(s)
- Federico J Hernández
- Instituto de Investigaciones en Físico Química de Córdoba (INFIQC) CONICET - UNC. Dpto. de Fisicoquímica - Facultad de Ciencias Químicas, Centro Láser de Ciencias Moleculares, Universidad Nacional de Córdoba, Ciudad Universitaria , X5000HUA Córdoba, Argentina
| | - Marcela C Capello
- Instituto de Investigaciones en Físico Química de Córdoba (INFIQC) CONICET - UNC. Dpto. de Fisicoquímica - Facultad de Ciencias Químicas, Centro Láser de Ciencias Moleculares, Universidad Nacional de Córdoba, Ciudad Universitaria , X5000HUA Córdoba, Argentina
| | - Ayumi Naito
- Chemical Resources Laboratory and Integrated Research Institute, Tokyo Institute of Technology , 4259 Nagatsuta , Midori-ku,Yokohama 226-8503, Japan
| | - Shun Manita
- Chemical Resources Laboratory and Integrated Research Institute, Tokyo Institute of Technology , 4259 Nagatsuta , Midori-ku,Yokohama 226-8503, Japan
| | - Kohei Tsukada
- Chemical Resources Laboratory and Integrated Research Institute, Tokyo Institute of Technology , 4259 Nagatsuta , Midori-ku,Yokohama 226-8503, Japan
| | - Mitsuhiko Miyazaki
- Chemical Resources Laboratory and Integrated Research Institute, Tokyo Institute of Technology , 4259 Nagatsuta , Midori-ku,Yokohama 226-8503, Japan
| | - Masaaki Fujii
- Chemical Resources Laboratory and Integrated Research Institute, Tokyo Institute of Technology , 4259 Nagatsuta , Midori-ku,Yokohama 226-8503, Japan
| | - Michel Broquier
- Centre Laser de l'Université Paris Sud (CLUPS/LUMAT), Université Paris-Sud, CNRS, Institut d'Optique Graduate School, Université Paris-Saclay , F-91405 Orsay, France.,Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Sud, Université Paris-Saclay , F-91405 Orsay, France
| | - Gilles Gregoire
- Centre Laser de l'Université Paris Sud (CLUPS/LUMAT), Université Paris-Sud, CNRS, Institut d'Optique Graduate School, Université Paris-Saclay , F-91405 Orsay, France.,Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Université Paris-Sud, Université Paris-Saclay , F-91405 Orsay, France
| | | | - Christophe Jouvet
- Aix Marseille Université, CNRS , PIIM UMR 7345, 13397, Marseille, France
| | - Gustavo A Pino
- Instituto de Investigaciones en Físico Química de Córdoba (INFIQC) CONICET - UNC. Dpto. de Fisicoquímica - Facultad de Ciencias Químicas, Centro Láser de Ciencias Moleculares, Universidad Nacional de Córdoba, Ciudad Universitaria , X5000HUA Córdoba, Argentina
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18
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Féraud G, Esteves-López N, Dedonder-Lardeux C, Jouvet C. UV spectroscopy of cold ions as a probe of the protonation site. Phys Chem Chem Phys 2015; 17:25755-60. [DOI: 10.1039/c5cp01122a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Where does the proton go?
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Affiliation(s)
- Géraldine Féraud
- CNRS, Aix Marseille Université
- PIIM
- Physique des Interactions Ioniques et Moléculaires (UMR-7345)
- 13397 Marseille Cedex 20
- France
| | - Natalia Esteves-López
- CNRS, Aix Marseille Université
- PIIM
- Physique des Interactions Ioniques et Moléculaires (UMR-7345)
- 13397 Marseille Cedex 20
- France
| | - Claude Dedonder-Lardeux
- CNRS, Aix Marseille Université
- PIIM
- Physique des Interactions Ioniques et Moléculaires (UMR-7345)
- 13397 Marseille Cedex 20
- France
| | - Christophe Jouvet
- CNRS, Aix Marseille Université
- PIIM
- Physique des Interactions Ioniques et Moléculaires (UMR-7345)
- 13397 Marseille Cedex 20
- France
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Yang KR, Xu X, Zheng J, Truhlar DG. Full-dimensional potentials and state couplings and multidimensional tunneling calculations for the photodissociation of phenol. Chem Sci 2014. [DOI: 10.1039/c4sc01967a] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Full-dimensional potentials and state couplings were developed for the photodissociation of phenol. We also present multidimensional tunneling calculations at the transition state on the shoulder of the first conical intersection.
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Affiliation(s)
- Ke R. Yang
- Department of Chemistry
- Chemical Theory Center
- Supercomputing Institute
- University of Minnesota
- Minneapolis, USA
| | - Xuefei Xu
- Department of Chemistry
- Chemical Theory Center
- Supercomputing Institute
- University of Minnesota
- Minneapolis, USA
| | - Jingjing Zheng
- Department of Chemistry
- Chemical Theory Center
- Supercomputing Institute
- University of Minnesota
- Minneapolis, USA
| | - Donald G. Truhlar
- Department of Chemistry
- Chemical Theory Center
- Supercomputing Institute
- University of Minnesota
- Minneapolis, USA
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