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  1. Article ; Online: High-Resolution Photoelectron Imaging of Cryogenically Cooled BiB

    Gao, Han-Wen / Choi, Hyun Wook / Hui, Jie / Wang, Lai-Sheng

    The journal of physical chemistry. A

    2024  

    Abstract: We report a high-resolution photoelectron imaging study of cryogenically cooled ... ...

    Abstract We report a high-resolution photoelectron imaging study of cryogenically cooled BiB
    Language English
    Publishing date 2024-04-25
    Publishing country United States
    Document type Journal Article
    ISSN 1520-5215
    ISSN (online) 1520-5215
    DOI 10.1021/acs.jpca.4c01672
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Probing Dipole-Bound States Using Photodetachment Spectroscopy and Resonant Photoelectron Imaging of Cryogenically Cooled Anions.

    Zhang, Yue-Rou / Yuan, Dao-Fu / Wang, Lai-Sheng

    The journal of physical chemistry letters

    2023  Volume 14, Issue 33, Page(s) 7368–7381

    Abstract: Molecular anions with polar neutral cores can support highly diffuse dipole-bound states below their detachment thresholds due to the long-range charge-dipole interaction. Such nonvalence states constitute a special class of excited electronic states for ...

    Abstract Molecular anions with polar neutral cores can support highly diffuse dipole-bound states below their detachment thresholds due to the long-range charge-dipole interaction. Such nonvalence states constitute a special class of excited electronic states for anions and were observed in early photodetachment experiments to measure the electron affinities of organic radicals. Recent experimental advances, in particular, the ability to create cold anions using a cryogenically cooled Paul trap, have allowed the investigation of dipole-bound excited states at a new level. For the first time, the zero-point level of dipole-bound excited states can be observed via resonant two-photon detachment, and resonant photoelectron spectroscopy can be performed via the above-threshold vibrational levels (Feshbach resonances) of the dipole-bound states. This Perspective describes recent progress in the investigation of dipole-bound states in the authors' lab using an electrospray photoelectron spectroscopy apparatus equipped with a cryogenically cooled Paul trap and high-resolution photoelectron imaging.
    Language English
    Publishing date 2023-08-11
    Publishing country United States
    Document type Journal Article ; Review
    ISSN 1948-7185
    ISSN (online) 1948-7185
    DOI 10.1021/acs.jpclett.3c01994
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Observation of a long-lived triplet excited state and strong electron correlation effects in the copper oxide anion (CuO-) using cryogenic photoelectron imaging.

    Kocheril, G Stephen / Gao, Han-Wen / Wang, Lai-Sheng

    The Journal of chemical physics

    2023  Volume 158, Issue 23

    Language English
    Publishing date 2023-06-15
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3113-6
    ISSN 1089-7690 ; 0021-9606
    ISSN (online) 1089-7690
    ISSN 0021-9606
    DOI 10.1063/5.0151516
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 4' 49/16: Show issues

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  4. Article ; Online: Observation of an electron-precise metal boryne complex: [BiBH]

    Gao, Han-Wen / Hui, Jie / Wang, Lai-Sheng

    Chemical communications (Cambridge, England)

    2023  Volume 59, Issue 83, Page(s) 12431–12434

    Abstract: Metal-boron triple bonds are rare due to the electron deficiency of boron. This study uncovers a simple electron-precise metal boryne complex, [BiBH] ...

    Abstract Metal-boron triple bonds are rare due to the electron deficiency of boron. This study uncovers a simple electron-precise metal boryne complex, [BiBH]
    Language English
    Publishing date 2023-10-17
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/d3cc04235a
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Electronic Control of the Position of the Pb Atom on the Surface of B

    Chen, Wei-Jia / Choi, Hyun Wook / Cavanagh, Joseph / Yuan, Dao-Fu / Wang, Lai-Sheng

    The journal of physical chemistry. A

    2024  

    Abstract: Spontaneous symmetry-breaking is common in chemical and physical systems. Here, we show that by adding an electron to ... ...

    Abstract Spontaneous symmetry-breaking is common in chemical and physical systems. Here, we show that by adding an electron to the
    Language English
    Publishing date 2024-04-27
    Publishing country United States
    Document type Journal Article
    ISSN 1520-5215
    ISSN (online) 1520-5215
    DOI 10.1021/acs.jpca.4c01282
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Observation of a Polarization-Assisted Dipole-Bound State.

    Yuan, Dao-Fu / Liu, Yuan / Zhang, Yue-Rou / Wang, Lai-Sheng

    Journal of the American Chemical Society

    2023  Volume 145, Issue 9, Page(s) 5512–5522

    Abstract: The critical dipole moment to bind an electron was empirically determined to be 2.5 debye, even though smaller values were predicted theoretically. Herein, we report the first observation of a polarization-assisted dipole-bound state (DBS) for a molecule ...

    Abstract The critical dipole moment to bind an electron was empirically determined to be 2.5 debye, even though smaller values were predicted theoretically. Herein, we report the first observation of a polarization-assisted dipole-bound state (DBS) for a molecule with a dipole moment below 2.5 debye. Photoelectron and photodetachment spectroscopies are conducted for cryogenically cooled indolide anions, where the neutral indolyl radical has a dipole moment of 2.4 debye. The photodetachment experiment reveals a DBS only 6 cm
    Language English
    Publishing date 2023-02-21
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3155-0
    ISSN 1520-5126 ; 0002-7863
    ISSN (online) 1520-5126
    ISSN 0002-7863
    DOI 10.1021/jacs.3c00246
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 4' 55/32: Show issues
    Z 7.3: Show issues

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  7. Article ; Online: Probing the Nature of the Transition-Metal-Boron Bonds and Novel Aromaticity in Small Metal-Doped Boron Clusters Using Photoelectron Spectroscopy.

    Chen, Teng-Teng / Cheung, Ling Fung / Wang, Lai-Sheng

    Annual review of physical chemistry

    2022  Volume 73, Page(s) 233–253

    Abstract: Photoelectron spectroscopy combined with quantum chemistry has been a powerful approach to elucidate the structures and bonding of size-selected boron clusters ( ... ...

    Abstract Photoelectron spectroscopy combined with quantum chemistry has been a powerful approach to elucidate the structures and bonding of size-selected boron clusters (B
    Language English
    Publishing date 2022-01-19
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 1470474-2
    ISSN 1545-1593 ; 0066-426X
    ISSN (online) 1545-1593
    ISSN 0066-426X
    DOI 10.1146/annurev-physchem-082820-113041
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  8. Article ; Online: Probing the electronic structure and spectroscopy of pyrrolyl and imidazolyl radicals using high-resolution photoelectron imaging of cryogenically cooled anions.

    Zhang, Yue-Rou / Yuan, Dao-Fu / Wang, Lai-Sheng

    Physical chemistry chemical physics : PCCP

    2022  Volume 24, Issue 11, Page(s) 6505–6514

    Abstract: High-resolution photoelectron imaging and photodetachment spectroscopy of cryogenically cooled pyrrolide and imidazolide anions are used to probe the electronic structure and spectroscopy of pyrrolyl and imidazolyl radicals. The high-resolution data ... ...

    Abstract High-resolution photoelectron imaging and photodetachment spectroscopy of cryogenically cooled pyrrolide and imidazolide anions are used to probe the electronic structure and spectroscopy of pyrrolyl and imidazolyl radicals. The high-resolution data allow the ground state vibronic structures of the two radicals to be completely resolved, yielding accurate electron affinities of 2.1433 ± 0.0008 eV and 2.6046 ± 0.0006 eV for pyrrolyl and imidazolyl radicals, respectively. Fundamental frequencies for eight vibrational modes of pyrrolyl and ten vibrational modes of imidazolyl are measured, including several nonsymmetric Franck-Condon-forbidden modes. Two electronic excited states are also observed for the two radicals, displaying diffuse spectral features in both systems. The observations of nonsymmetric vibrational modes in the ground states and the diffuse excited state features provide strong evidence for vibronic couplings between the ground state and the two close-by excited states. The 2-pyrrolide isomer is also observed as a minor species from the electrospray ionization source and the electron affinity of 2-pyrrolyl is measured to be 1.6690 ± 0.0030 eV along with five vibrational frequencies. Even though the HOMOs of both pyrrolide and imidazolide anions are p orbitals, photodetachment spectroscopy reveals completely different threshold behaviors for the two anions: a d-wave-dominated spectrum for pyrrolide and an s-wave-dominated spectrum for imidazolide. The current study provides a wealth of electronic and spectroscopic information, which is ideal to compare with more accurate vibronic coupling calculations for these two important radicals, as well as interesting information about the photodetachment dynamics of the two anions.
    Language English
    Publishing date 2022-03-16
    Publishing country England
    Document type Journal Article
    ZDB-ID 1476244-4
    ISSN 1463-9084 ; 1463-9076
    ISSN (online) 1463-9084
    ISSN 1463-9076
    DOI 10.1039/d2cp00189f
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Investigation of the Electronic and Vibrational Structures of the 2-Furanyloxy Radical Using Photoelectron Imaging and Photodetachment Spectroscopy via the Dipole-Bound State of the 2-Furanyloxide Anion.

    Zhang, Yue-Rou / Yuan, Dao-Fu / Wang, Lai-Sheng

    The journal of physical chemistry letters

    2022  , Page(s) 11481–11488

    Abstract: The 2-furanyloxy radical is an important chemical reaction intermediate in the combustion of biofuels and aromatic compounds. We report an investigation of its electronic and vibrational structures using photoelectron and photodetachment spectroscopy and ...

    Abstract The 2-furanyloxy radical is an important chemical reaction intermediate in the combustion of biofuels and aromatic compounds. We report an investigation of its electronic and vibrational structures using photoelectron and photodetachment spectroscopy and resonant photoelectron imaging (PEI) of cryogenically cooled 2-furanyloxide anion. The electron affinity of 2-furanyloxy is measured to be 1.7573(8) eV. Two excited electronic states are observed at excitation energies of 2.14 and 2.82 eV above the ground state. Photodetachment spectroscopy reveals a dipole-bound state 0.0143 eV below the detachment threshold and 25 vibrational Feshbach resonances for the 2-furanyloxide anion. The combination of photodetachment spectroscopy and resonant PEI yields frequencies for 18 out of a total of 21 vibrational modes for the 2-furanyloxy radical, including all six of its bending modes. The rich electronic and vibrational information will be valuable for further understanding the role of 2-furanyloxy as a key reaction intermediate of combustion and atmospheric interests.
    Language English
    Publishing date 2022-12-05
    Publishing country United States
    Document type Journal Article
    ISSN 1948-7185
    ISSN (online) 1948-7185
    DOI 10.1021/acs.jpclett.2c03382
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Observation of Core-Excited Dipole-Bound States.

    Zhang, Yue-Rou / Yuan, Dao-Fu / Wang, Lai-Sheng

    The journal of physical chemistry letters

    2022  Volume 13, Issue 9, Page(s) 2124–2129

    Abstract: Polar molecules can bind an electron in a diffuse orbital due to the charge-dipole interaction. Electronic excited states of polar molecules can also bind an electron to form core-excited dipole-bound states (DBSs), analogous to core-excited Rydberg ... ...

    Abstract Polar molecules can bind an electron in a diffuse orbital due to the charge-dipole interaction. Electronic excited states of polar molecules can also bind an electron to form core-excited dipole-bound states (DBSs), analogous to core-excited Rydberg states. However, core-excited DBSs have not been observed because of the complicated electronic structure of molecular systems. Here, we report the observation of a core-excited DBS in the pyrazolide anion as a result of the favorable electronic structure of the neutral pyrazolyl core, which has a low-lying excited state (Ã
    Language English
    Publishing date 2022-02-28
    Publishing country United States
    Document type Journal Article
    ISSN 1948-7185
    ISSN (online) 1948-7185
    DOI 10.1021/acs.jpclett.2c00275
    Database MEDical Literature Analysis and Retrieval System OnLINE

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