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Zhang YR, Yuan DF, Qian CH, Zhu GZ, Wang LS. Role of Polarization Interactions in the Formation of Dipole-Bound States. J Am Chem Soc 2023. [PMID: 37368495 DOI: 10.1021/jacs.3c04740] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
Even though there is a critical dipole moment required to support a dipole-bound state (DBS), how molecular polarizability may influence the formation of DBSs is not well understood. Pyrrolide, indolide, and carbazolide provide an ideal set of anions to systematically examine the role of polarization interactions in the formation of DBSs. Here, we report an investigation of carbazolide using cryogenic photodetachment spectroscopy and high-resolution photoelectron spectroscopy (PES). A polarization-assisted DBS is observed at 20 cm-1 below the detachment threshold for carbazolide, even though the carbazolyl neutral core has a dipole moment (2.2 D) smaller than the empirical critical value (2.5 D) to support a dipole-bound state. Photodetachment spectroscopy reveals nine vibrational Feshbach resonances of the DBS, as well as three intense and broad shape resonances. The electron affinity of carbazolyl is measured accurately to be 2.5653 ± 0.0004 eV (20,691 ± 3 cm-1). The combination of photodetachment spectroscopy and resonant PES allows fundamental frequencies for 14 vibrational modes of carbazolyl to be measured. The three shape resonances are due to above-threshold excitation to the three low-lying electronic states (S1-S3) of carbazolide. Resonant PES of the shape resonances is dominated by autodetachment processes. Ultrafast relaxation from the S2 and S3 states to S1 is observed, resulting in constant kinetic energy features in the resonant PES. The current study provides decisive information about the role that polarization plays in the formation of DBSs, as well as rich spectroscopic information about the carbazolide anion and the carbazolyl radical.
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Affiliation(s)
- Yue-Rou Zhang
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Dao-Fu Yuan
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Chen-Hui Qian
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Guo-Zhu Zhu
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Lai-Sheng Wang
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
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2
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Qian CH, Zhu GZ, Zhang YR, Wang LS. Photodetachment spectroscopy and resonant photoelectron imaging of the 2-naphthoxide anion via dipole-bound excited states. J Chem Phys 2020; 152:214307. [DOI: 10.1063/5.0011234] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Affiliation(s)
- Chen-Hui Qian
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA
| | - Guo-Zhu Zhu
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA
| | - Yue-Rou Zhang
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA
| | - Lai-Sheng Wang
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA
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Takemoto Y, Mao D, Punzalan LL, Götze S, Sato SI, Uesugi M. Discovery of a Small-Molecule-Dependent Photolytic Peptide. J Am Chem Soc 2020; 142:1142-1146. [PMID: 31899620 DOI: 10.1021/jacs.9b09178] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We accidentally found that YM-53601, a known small-molecule inhibitor of squalene synthase (SQS), selectively depletes SQS from mammalian cells upon UV irradiation. Further analyses indicated that the photodepletion of SQS requires its short peptide segment located at the COOH terminus. Remarkably, when the 27 amino acid peptide was fused to green fluorescent protein or unrelated proteins at either the NH2 or COOH terminus, such fusion proteins were selectively depleted when the cells were treated with both YM-53601 and UV exposure. Product analysis and electron spin resonance experiments suggested that the UV irradiation promotes homolytic C-O bond cleavage of the aryl ether group in YM-53601. It is likely that the radical species generated from UV-activated YM-53601 abstract hydrogen atoms from the SQS peptide, leading to the photolysis of the entire protein. The pair of the SQS peptide and YM-53601 discovered in the present study paves the way for the design of a new small-molecule-controlled optogenetic tool.
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Affiliation(s)
- Yasushi Takemoto
- Institute for Chemical Research , Kyoto University , Uji , Kyoto 611-0011 , Japan
| | - Di Mao
- Institute for Chemical Research , Kyoto University , Uji , Kyoto 611-0011 , Japan
| | - Louvy Lynn Punzalan
- Institute for Chemical Research , Kyoto University , Uji , Kyoto 611-0011 , Japan
| | - Sebastian Götze
- Institute for Chemical Research , Kyoto University , Uji , Kyoto 611-0011 , Japan
| | - Shin-Ichi Sato
- Institute for Chemical Research , Kyoto University , Uji , Kyoto 611-0011 , Japan
| | - Motonari Uesugi
- Institute for Chemical Research , Kyoto University , Uji , Kyoto 611-0011 , Japan.,Institute for Integrated Cell-Material Sciences (WPI-iCeMS) , Kyoto University , Uji , Kyoto 611-0011 , Japan.,School of Pharmacy , Fudan University , Shanghai 201203 , China
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4
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Kregel SJ, Garand E. Ground and low-lying excited states of phenoxy, 1-naphthoxy, and 2-naphthoxy radicals via anion photoelectron spectroscopy. J Chem Phys 2018; 149:074309. [DOI: 10.1063/1.5045685] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Steven J. Kregel
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Ave., Madison, Wisconsin 53706, USA
| | - Etienne Garand
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Ave., Madison, Wisconsin 53706, USA
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Reva I, Lapinski L, Lopes Jesus AJ, Nowak MJ. Photoinduced transformations of indole and 3-formylindole monomers isolated in low-temperature matrices. J Chem Phys 2017; 147:194304. [DOI: 10.1063/1.5003326] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Igor Reva
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Leszek Lapinski
- Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw, Poland
| | - A. J. Lopes Jesus
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
- CQC, Faculty of Pharmacy, University of Coimbra, 3004-295 Coimbra, Portugal
| | - Maciej J. Nowak
- Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw, Poland
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Nowak MJ, Reva I, Rostkowska H, Lapinski L. UV-induced hydrogen-atom transfer and hydrogen-atom detachment in monomeric 7-azaindole isolated in Ar and n-H2 matrices. Phys Chem Chem Phys 2017; 19:11447-11454. [DOI: 10.1039/c7cp01363a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Upon UV excitation, the N1H form of 7-azaindole isolated in an Ar matrix transforms into N7H, C3H tautomers and the 7-azaindolyl radical; whereas only C3H and 7-azaindolyl radical products are photogenerated in solid H2 environment.
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Affiliation(s)
- Maciej J. Nowak
- Institute of Physics
- Polish Academy of Sciences
- 02-668 Warsaw
- Poland
| | - Igor Reva
- CQC
- Department of Chemistry
- University of Coimbra
- 3004-535 Coimbra
- Portugal
| | - Hanna Rostkowska
- Institute of Physics
- Polish Academy of Sciences
- 02-668 Warsaw
- Poland
| | - Leszek Lapinski
- Institute of Physics
- Polish Academy of Sciences
- 02-668 Warsaw
- Poland
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Degradation mechanism of γ-irradiated polytetrafluoroethylene (PTFE) powder by low-temperature matrix-isolation infrared spectroscopy and chemiluminescence spectroscopy. Polym J 2016. [DOI: 10.1038/pj.2015.139] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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8
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Kuş N, Sagdinc S, Fausto R. Infrared Spectrum and UV-Induced Photochemistry of Matrix-Isolated 5-Hydroxyquinoline. J Phys Chem A 2015; 119:6296-308. [PMID: 26024730 DOI: 10.1021/acs.jpca.5b03942] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The structure, infrared spectrum, and photochemistry of 5-hydroxyquinoline (5HQ) were studied by matrix isolation infrared spectroscopy, complemented by theoretical calculations performed at the DFT(B3LYP)/6-311++G(d,p) level of approximation. According to the calculations, the trans conformer of 5HQ (with the OH group pointing to the opposite direction of the pyridine ring of the molecule) is more stable than the cis form (by ∼8.8 kJ mol(-1)). The main factors determining the relative stability of the two conformers were rationalized through natural bond orbital (NBO) and charge density analyses. The compound was trapped in solid nitrogen at 10 K, and its infrared spectra registered and interpreted, showing the sole presence in the matrix of the more stable trans conformer. Broadband in situ UV irradiations (λ ≥ 288 nm and λ ≥ 235 nm) allowed for the observation of different chemical transformations, which started by excitation to the S1 state of 5HQ, followed by homolytic cleavage of the O-H bond, and subsequent reattachment of the H atom to the 5HQ radical to form quinolin-5(6H)-one and quinolin-5(8H)-one. The first of these two quinolinones was found to convert to open-ring isomeric ketenes, especially when irradiation was performed at higher energy, whereas the second is rather stable under the used experimental conditions. As a whole, the observed photochemistry of matrix-isolated 5HQ closely matches those previously reported for phenol and thiophenol. A detailed mechanistic interpretation for the observed photochemical processes is here proposed, which received support from time-dependent DFT calculations.
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Affiliation(s)
- Nihal Kuş
- †CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal.,‡Department of Physics, Anadolu University, 26470 Eskişehir, Turkey
| | - Seda Sagdinc
- †CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal.,§Department of Physics, Kocaeli University, Kocaeli, Turkey
| | - Rui Fausto
- †CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
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9
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Reva I, Nowak MJ, Lapinski L, Fausto R. Hydrogen atom transfer reactions in thiophenol: photogeneration of two new thione isomers. Phys Chem Chem Phys 2015; 17:4888-98. [DOI: 10.1039/c4cp04125a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photochemistry of thiophenol monomers confined in cryogenic argon matrices is dominated by hydrogen atom transfer reactions and leads to the formation of two new thione isomers, which were characterized in this work by infrared spectroscopy and theoretical calculations.
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Affiliation(s)
- Igor Reva
- Department of Chemistry
- University of Coimbra
- 3004-535 Coimbra
- Portugal
| | - Maciej J. Nowak
- Institute of Physics
- Polish Academy of Sciences
- 02-668 Warsaw
- Poland
| | - Leszek Lapinski
- Institute of Physics
- Polish Academy of Sciences
- 02-668 Warsaw
- Poland
| | - Rui Fausto
- Department of Chemistry
- University of Coimbra
- 3004-535 Coimbra
- Portugal
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