51
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Mikheev YA, Ershov YA. Fragmentation of Protonated Dimethylaminoazobenzene during Laser Pulsed Photolysis in a Cryogenic Atmosphere of Rarefied Helium. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2020. [DOI: 10.1134/s0036024420110254] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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52
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Castellani ME, Avagliano D, González L, Verlet JRR. Site-Specific Photo-oxidation of the Isolated Adenosine-5'-triphosphate Dianion Determined by Photoelectron Imaging. J Phys Chem Lett 2020; 11:8195-8201. [PMID: 32886886 DOI: 10.1021/acs.jpclett.0c02089] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Photoelectron imaging of the isolated adenosine-5'-triphosphate dianion excited to the 1ππ* states reveals that electron emission is predominantly parallel to the polarization axis of the light and arises from subpicosecond electron tunneling through the repulsive Coulomb barrier (RCB). The computed RCB shows that the most probable electron emission site is on the amino group of adenine. This is consistent with the photoelectron imaging: excitation to the 1ππ* states leads to an aligned ensemble distributed predominantly parallel to the long axis of adenine; the subsequent electron tunneling site is along this axis; and the negatively charged phosphate groups guide the outgoing electron mostly along this axis at long range. Imaging of electron tunneling from polyanions combined with computational chemistry may offer a general route for probing the intrinsic photo-oxidation site and dynamics as well as the overall structure of complex isolated species.
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Affiliation(s)
| | - Davide Avagliano
- Institute of Theoretical Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 17, 1090 Vienna, Austria
| | - Leticia González
- Institute of Theoretical Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 17, 1090 Vienna, Austria
| | - Jan R R Verlet
- Department of Chemistry, Durham University, Durham DH1 3LE, United Kingdom
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53
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Kang DH, An S, Kim SK. Real-Time Autodetachment Dynamics of Vibrational Feshbach Resonances in a Dipole-Bound State. PHYSICAL REVIEW LETTERS 2020; 125:093001. [PMID: 32915603 DOI: 10.1103/physrevlett.125.093001] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/13/2020] [Accepted: 08/06/2020] [Indexed: 06/11/2023]
Abstract
Feshbach resonances corresponding to metastable vibrational states of the dipole-bound state (DBS) have been interrogated in real time for the first time. The state-specific autodetachment rates of the DBS of the phenoxide anion in the cryogenically cooled ion trap have been directly measured, giving τ∼33.5 ps for the lifetime of the most prominent 11^{'1} mode (519 cm^{-1}). Overall, the lifetime of the individual DBS state is strongly mode dependent to give τ∼5 ps for the 18^{'1} mode (632 cm^{-1}) and τ∼12 ps for the 11^{'2} mode (1036 cm^{-1}). The qualitative trend of the experiment could be successfully explained by the Fermi's golden rule. Autodetachment of the 11^{'1}18^{'1} combination mode is found to be much accelerated (τ≤1.4 ps) than expected, and its bifurcation dynamics into either the 11^{1}18^{0} or 11^{0}18^{1} state of the neutral core radical, according to the propensity rule of Δv=-1, could be distinctly differentiated through the photoelectron images to provide the unprecedented deep insights into the interaction between electronic and nuclear dynamics of the DBS, challenging the most sophisticated theoretical calculations.
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Affiliation(s)
- Do Hyung Kang
- Department of Chemistry, KAIST, Daejeon 34141, Republic of Korea
| | - Sejun An
- 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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54
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Qin Z, Hou GL, Yang Z, Valiev M, Wang XB. Distonic radical anion species in cysteine oxidation processes. Phys Chem Chem Phys 2020; 22:17554-17558. [PMID: 32716467 DOI: 10.1039/d0cp02165b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Oxidation of cysteine residues constitutes an important regulatory mechanism in the function of biological systems. Much of this behavior is controlled by the specific chemical properties of the thiol side-chain group, where reactions with reactive oxygen species take place. Herein, we investigated the entire cysteine oxidation cycle Cys-SH → Cys-SOnH (n = 1, 2, and 3) using cryogenic negative ion photoelectron spectroscopy and quantum-chemical calculations. The conventional view of the first reversible oxidation step (n = 1) is associated with sulfenate species. Yet our results indicate that an alternative option exists in the form of a novel distonic radical anion, ˙OS-CH2CH(NH2)-COO-, with an unpaired electron on the thiol group and excess negative charge on the carboxylate group. Higher order oxidation states (n = 2 and 3) are thought to be associated with irreversible oxidative damage, and our results show that excess negative charge in those cases migrates to the -SOn- group. Furthermore, these species are stable towards 1e oxidation, as opposed to the n = 1 case that undergoes intra-molecular proton transfer. The molecular level insights reported in this work provide direct spectroscopic evidence of the unique chemical versatility of Cys-sulfenic acid (Cys-SOH) in post-translational modifications of protein systems.
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Affiliation(s)
- Zhengbo Qin
- Anhui Province Key Laboratory of Optoelectric Materials Science and Technology, Anhui Normal University, Wuhu, 241000, China.
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55
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Yuan DF, Liu Y, Qian CH, Zhang YR, Rubenstein BM, Wang LS. Observation of a π-Type Dipole-Bound State in Molecular Anions. PHYSICAL REVIEW LETTERS 2020; 125:073003. [PMID: 32857546 DOI: 10.1103/physrevlett.125.073003] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 06/07/2020] [Accepted: 07/28/2020] [Indexed: 06/11/2023]
Abstract
We report the observation of a π-type dipole-bound state (π-DBS) in cryogenically cooled deprotonated 9-anthrol molecular anions (9AT^{-}) by resonant two-photon photoelectron imaging. A DBS is observed 191 cm^{-1} (0.0237 eV) below the detachment threshold, and the existence of the π-DBS is revealed by a distinct (s+d)-wave photoelectron angular distribution. The π-DBS is stabilized by the large anisotropic in-plane polarizability of 9AT. The population of the dipole-forbidden π-DBS is proposed to be via a nonadiabatic coupling with the dipole-allowed σ-type DBS mediated by molecular rotations.
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Affiliation(s)
- Dao-Fu Yuan
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA
| | - Yuan Liu
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA
| | - Chen-Hui Qian
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA
| | - Yue-Rou Zhang
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA
| | - Brenda M Rubenstein
- 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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56
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Mikheev YA, Ershov YA. Phenylaminyl Cations in the Liquid and Gas-Phase Phototransformation of Protonated Azobenzene. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2020. [DOI: 10.1134/s0036024420080208] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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57
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Murashima H, Fujihara A. Wavelength dependence of chiral recognition using ions between photoexcited tryptophan and sugars. Chem Phys 2020. [DOI: 10.1016/j.chemphys.2020.110818] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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58
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Rohdenburg M, Yang Z, Su P, Bernhardt E, Yuan Q, Apra E, Grabowsky S, Laskin J, Jenne C, Wang XB, Warneke J. Properties of gaseous closo-[B 6X 6] 2- dianions (X = Cl, Br, I). Phys Chem Chem Phys 2020; 22:17713-17724. [PMID: 32728676 DOI: 10.1039/d0cp02581j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Electronic structure, collision-induced dissociation (CID) and bond properties of closo-[B6X6]2- (X = Cl-I) are investigated in direct comparison with their closo-[B12X12]2- analogues. Photoelectron spectroscopy (PES) and theoretical investigations reveal that [B6X6]2- dianions are electronically significantly less stable than the corresponding [B12X12]2- species. Although [B6Cl6]2- is slightly electronically unstable, [B6Br6]2- and [B6I6]2- are intrinsically stable dianions. Consistent with the trend in the electron detachment energy, loss of an electron (e- loss) is observed in CID of [B6X6]2- (X = Cl, Br) but not for [B6I6]2-. Halogenide loss (X- loss) is common for [B6X6]2- (X = Br, I) and [B12X12]2- (X = Cl, Br, I). Meanwhile, X˙ loss is only observed for [B12X12]2- (X = Br, I) species. The calculated reaction enthalpies of the three competing dissociation pathways (e-, X- and X˙ loss) indicated a strong influence of kinetic factors on the observed fragmentation patterns. The repulsive Coulomb barrier (RCB) determines the transition state for the e- and X- losses. A significantly lower RCB for X- loss than for e- loss was found in both experimental and theoretical investigations and can be rationalized by the recently introduced concept of electrophilic anions. The positive reaction enthalpies for X- losses are significantly lower for [B6X6]2- than for [B12X12]2-, while enthalpies for X˙ losses are higher. These observations are consistent with a difference in bond character of the B-X bonds in [B6X6]2- and [B12X12]2-. A complementary bonding analysis using QTAIM, NPA and ELI-D based methods suggests that B-X bonds in [B12X12]2- have a stronger covalent character than in [B6X6]2-, in which X has a stronger halide character.
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Affiliation(s)
- Markus Rohdenburg
- Institut für Angewandte und Physikalische Chemie, Universität Bremen, Fachbereich 2-Biologie/Chemie, 28359 Bremen, Germany
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59
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Wang YT, Ning CG, Liu HT, Wang LS. High-Resolution Photoelectron Imaging and Photodetachment Spectroscopy of Cryogenically Cooled IO –. J Phys Chem A 2020; 124:5720-5726. [DOI: 10.1021/acs.jpca.0c04080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yong-Tian Wang
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Chuan-Gang Ning
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, P. R. China
| | - Hong-Tao Liu
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, P. R. China
| | - Lai-Sheng Wang
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
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60
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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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61
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Tang R, Fu X, Lu Y, Ning C. Accurate electron affinity of Ga and fine structures of its anions. J Chem Phys 2020; 152:114303. [PMID: 32199425 DOI: 10.1063/1.5144962] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report the high-resolution photoelectron spectra of negative gallium anions obtained via the slow-electron velocity-map imaging method. The electron affinity of Ga is determined to be 2429.07(12) cm-1 or 0.301 166(14) eV. The fine structures of Ga are well resolved: 187.31(22) cm-1 or 23.223(27) meV for 3P1 and 502.70(28) cm-1 or 62.327(35) meV for 3P2 above the ground state 3P0, respectively. The photoelectron angular distribution for photodetachment from Ga-(4s24p2 3P0) to Ga(4s25s 2S1/2) is measured. An unexpected perpendicular distribution instead of an isotropic distribution is observed, which is due to a resonance near 3.3780 eV.
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Affiliation(s)
- Rulin Tang
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China
| | - Xiaoxi Fu
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China
| | - Yuzhu Lu
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China
| | - Chuangang Ning
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China
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62
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Wang L, Yuan Q, Cao W, Han J, Zhou X, Liu S, Wang XB. Probing Orientation-Specific Charge-Dipole Interactions between Hexafluoroisopropanol and Halides: A Joint Photoelectron Spectroscopy and Theoretical Study. J Phys Chem A 2020; 124:2036-2045. [PMID: 32077296 DOI: 10.1021/acs.jpca.0c00024] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The interactions between hexafluoroisopropanol (HFIP) and halogen anions X- (F-, Cl-, Br-, and I-) have been investigated using negative ion photoelectron (NIPE) spectroscopy and ab initio calculations. The measured NIPE spectrum of each [HFIP·X]- (X = Cl, Br, and I) complex shows a pattern identical to the corresponding X- by shifting to the high electron binding energy side, indicative of the formation of the [HFIP···X-] structure in which X- interacts with HFIP via charge-dipole interactions. However, the spectrum of [HFIP·F]- appears completely different from that of F- and is more similar to the spectrum of the deprotonated HFIP anion (HFIP-H-). The geometry and electron density calculations indicate that a neutral HF molecule is formed upon HFIP interacting with F- via proton transfer, rendering a stable structure of [HFIP-H···HF]-. Two conformers of [HFIP-H·HF]- with HFIP being in synperiplanar and antiperiplanar configurations, respectively, are observed, providing direct experimental evidences to show the distinctly different and orientation-specific interactions between HFIP and halide anions.
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Affiliation(s)
- Lei Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Qinqin Yuan
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Wenjin Cao
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Jia Han
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Xiaoguo Zhou
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Shilin Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Xue-Bin Wang
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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63
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Yuan Q, Cao W, Wang XB. Cryogenic and temperature-dependent photoelectron spectroscopy of metal complexes. INT REV PHYS CHEM 2020. [DOI: 10.1080/0144235x.2020.1719699] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Qinqin Yuan
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Wenjin Cao
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Xue-Bin Wang
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA, USA
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64
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Lu Y, Zhao J, Tang R, Fu X, Ning C. Measurement of electron affinity of iridium atom and photoelectron angular distributions of iridium anion. J Chem Phys 2020; 152:034302. [DOI: 10.1063/1.5134535] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Yuzhu Lu
- Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China
| | - Jing Zhao
- Security Printing Institute of People’s Bank of China, Beijing 100070, China
| | - Rulin Tang
- Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China
| | - Xiaoxi Fu
- Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China
| | - Chuangang Ning
- Department of Physics, State Key Laboratory of Low Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China
- Collaborative Innovation Center of Quantum Matter, Beijing, China
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65
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Zhang J, Yang Y, Sun Z, Wang XB. Determinants for proton location and electron coupled proton transfer in hydrogen bonded pentafluorophenol–anion clusters. Phys Chem Chem Phys 2020; 22:16712-16720. [DOI: 10.1039/d0cp02892d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work reveals the determinant factors for proton locations and electron coupled proton transfer (ECPT) in biologically relevant hydrogen bonded systems.
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Affiliation(s)
- Jian Zhang
- Key Laboratory of Science and Technology of Eco-Textiles
- Ministry of Education
- College of Chemistry
- Chemical Engineering and Biotechnology
- Dong Hua University
| | - Yan Yang
- State Key Laboratory of Precision Spectroscopy, and Department of Physics
- East China Normal University
- Shanghai 200062
- China
| | - Zhenrong Sun
- State Key Laboratory of Precision Spectroscopy, and Department of Physics
- East China Normal University
- Shanghai 200062
- China
| | - Xue-Bin Wang
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland
- USA
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66
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Li Z, Jiang Y, Yuan Q, Warneke J, Hu Z, Yang Y, Sun H, Sun Z, Wang XB. Photoelectron spectroscopy and computational investigations of the electronic structures and noncovalent interactions of cyclodextrin-closo-dodecaborate anion complexes χ-CD·B12X122− (χ = α, β, γ; X = H, F). Phys Chem Chem Phys 2020; 22:7193-7200. [DOI: 10.1039/d0cp00700e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We report a joint negative ion photoelectron spectroscopy and computational study on the electronic structures and noncovalent interactions of a series of cyclodextrin-closo-dodecaborate dianion complexes, χ-CD·B12X122− (χ = α, β, γ; X = H, F).
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Affiliation(s)
- Zhipeng Li
- State Key Laboratory of Precision Spectroscopy
- East China Normal University
- Shanghai 200062
- China
- Physical Sciences Division
| | - Yanrong Jiang
- State Key Laboratory of Precision Spectroscopy
- East China Normal University
- Shanghai 200062
- China
| | - Qinqin Yuan
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Jonas Warneke
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie
- Universität Leipzig
- 04103 Leipzig
- Germany
| | - Zhubin Hu
- State Key Laboratory of Precision Spectroscopy
- East China Normal University
- Shanghai 200062
- China
| | - Yan Yang
- State Key Laboratory of Precision Spectroscopy
- East China Normal University
- Shanghai 200062
- China
| | - Haitao Sun
- State Key Laboratory of Precision Spectroscopy
- East China Normal University
- Shanghai 200062
- China
- Collaborative Innovation Center of Extreme Optics
| | - Zhenrong Sun
- State Key Laboratory of Precision Spectroscopy
- East China Normal University
- Shanghai 200062
- China
- Collaborative Innovation Center of Extreme Optics
| | - Xue-Bin Wang
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland
- USA
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67
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Zhang H, Cao W, Yuan Q, Wang L, Zhou X, Liu S, Wang XB. Spectroscopic evidence for intact carbonic acid stabilized by halide anions in the gas phase. Phys Chem Chem Phys 2020; 22:19459-19467. [DOI: 10.1039/d0cp02338h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The whole series of halide anions can stabilize elusive carbonic acid in the gas phase through dual hydrogen bonds.
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Affiliation(s)
- Hanhui Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale
- Department of Chemical Physics
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Wenjin Cao
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Qinqin Yuan
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Lei Wang
- Hefei National Laboratory for Physical Sciences at the Microscale
- Department of Chemical Physics
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Xiaoguo Zhou
- Hefei National Laboratory for Physical Sciences at the Microscale
- Department of Chemical Physics
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Shilin Liu
- Hefei National Laboratory for Physical Sciences at the Microscale
- Department of Chemical Physics
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Xue-Bin Wang
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland
- USA
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68
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Tang R, Si R, Fei Z, Fu X, Lu Y, Brage T, Liu H, Chen C, Ning C. Candidate for Laser Cooling of a Negative Ion: High-Resolution Photoelectron Imaging of Th^{-}. PHYSICAL REVIEW LETTERS 2019; 123:203002. [PMID: 31809070 DOI: 10.1103/physrevlett.123.203002] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Revised: 08/14/2019] [Indexed: 06/10/2023]
Abstract
Laser cooling is a well-established technique for the creation of ensembles of ultracold neutral atoms or positive ions. This ability has opened many exciting new research fields over the past 40 years. However, no negatively charged ions have been directly laser cooled because a cycling transition is very rare in atomic anions. Efforts of more than a decade currently have La^{-} as the most promising candidate. We report on experimental and theoretical studies supporting Th^{-} as a new promising candidate for laser cooling. The measured and calculated electron affinities of Th are, respectively, 4901.35(48) cm^{-1} and 4832 cm^{-1}, or 0.607 690(60) and 0.599 eV, almost a factor of 2 larger than the previous theoretical value of 0.368 eV. The ground state of Th^{-} is determined to be 6d^{3}7s^{2} ^{4}F_{3/2}^{e} rather than 6d^{2}7s^{2}7p ^{4}G_{5/2}^{o}. The consequence of this is that there are several strong electric dipole transitions between the bound levels arising from configurations 6d^{3}7s^{2} and 6d^{2}7s^{2}7p in Th^{-}. The potential laser-cooling transition is ^{2}S_{1/2}^{o}↔^{4}F_{3/2}^{e} with a wavelength of 2.6 μm. The zero nuclear spin and hence lack of hyperfine structure in Th^{-} reduces the potential complications in laser cooling as encountered in La^{-}, making Th^{-} a new and exciting candidate for laser cooling.
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Affiliation(s)
- Rulin Tang
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China
| | - Ran Si
- Lund University, Department of Physics, P.O. Box 118, 221 00 Lund, Sweden
- Shanghai EBIT Lab, Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Department of Nuclear Science and Technology, Fudan University, Shanghai 200433, China
| | - Zejie Fei
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Xiaoxi Fu
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China
| | - Yuzhu Lu
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China
| | - Tomas Brage
- Lund University, Department of Physics, P.O. Box 118, 221 00 Lund, Sweden
- Shanghai EBIT Lab, Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Department of Nuclear Science and Technology, Fudan University, Shanghai 200433, China
| | - Hongtao Liu
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Chongyang Chen
- Shanghai EBIT Lab, Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Department of Nuclear Science and Technology, Fudan University, Shanghai 200433, China
| | - Chuangang Ning
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 100084, China
- Collaborative Innovation Center of Quantum Matter, Beijing 100084, China
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69
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Qian CH, Zhu GZ, Wang LS. Probing the Critical Dipole Moment To Support Excited Dipole-Bound States in Valence-Bound Anions. J Phys Chem Lett 2019; 10:6472-6477. [PMID: 31589447 DOI: 10.1021/acs.jpclett.9b02679] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We report photodetachment spectroscopy and high-resolution photoelectron imaging of para-halogen substituted phenoxide anions, p-XC6H4O- (X = F, Cl, Br, I). The dipole moments of the p-XC6H4O neutral radicals increase from 2.56 to 3.19 D for X = F to I, providing a series of similar molecules to allow the examination of charge-dipole interactions by minimizing molecule-dependent effects. Excited DBSs ([XC6H4O]*-) are observed for the four anions with binding energies of 8, 11, 24, and 53 cm-1, respectively, for X = F to I, below their respective detachment thresholds. The binding energies exhibit a linear correlation with the dipole moments of the neutral radicals, extrapolating to a critical dipole moment of 2.5 D for zero binding energy. Because of the small binding energy of the excited DBS of [FC6H4O]*-, rotational autodetachment is observed to compete with vibrational autodetachment in the resonant photoelectron spectra, resulting in electrons with near zero kinetic energies.
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Affiliation(s)
- 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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70
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Hou GL, Wang XB. Spectroscopic Signature of Proton Location in Proton Bound HSO 4-·H +·X - (X = F, Cl, Br, and I) Clusters. J Phys Chem Lett 2019; 10:6714-6719. [PMID: 31609627 DOI: 10.1021/acs.jpclett.9b02663] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Proton transfer plays a vital role in a variety of chemical and biological processes. The proton location in proton bound clusters, specifically, in the anions of HSO4-·H+·X- (X = F, Cl, Br, and I), has been studied by negative ion photoelectron spectroscopy and ab initio theoretical calculations. The measured photoelectron spectra of HSO4-·H+·X- (X = Cl, Br, and I) closely resemble those of X- by simply shifting to higher electron binding energies, suggesting that X- is the chromophore of the electron photodetachment, a fact clearly violating gas-phase acidity predictions. However, in the X = F case, the spectrum of HSO4-·H+·F- is more similar to that of HSO4-, indicating that H+ stays with F- and that the HSO4- moiety carries the extra electron. Accompanying theoretical analyses are in excellent agreement with the experimental measurements and observations. This work provides direct spectroscopic evidence of the proton locations, clearly showing cases in which proton affinities of the constituent bases cannot correctly predict the right chemistry involving proton transfer processes.
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Affiliation(s)
- Gao-Lei Hou
- Physical and Computational Sciences Directorate , Pacific Northwest National Laboratory , 902 Battelle Boulevard , P.O. Box 999, MS K8-88, Richland , Washington 99352 , United States
| | - Xue-Bin Wang
- Physical and Computational Sciences Directorate , Pacific Northwest National Laboratory , 902 Battelle Boulevard , P.O. Box 999, MS K8-88, Richland , Washington 99352 , United States
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71
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Zhu GZ, Wang LS. High-resolution photoelectron imaging and resonant photoelectron spectroscopy via noncovalently bound excited states of cryogenically cooled anions. Chem Sci 2019; 10:9409-9423. [PMID: 32055317 PMCID: PMC6984392 DOI: 10.1039/c9sc03861b] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Accepted: 09/16/2019] [Indexed: 01/12/2023] Open
Abstract
Valence-bound anions with polar neutral cores (μ > ∼2.5 D) can support dipole-bound excited states below the detachment threshold. These dipole-bound states (DBSs) are highly diffuse and the weakly bound electron in the DBS can be readily autodetached via vibronic coupling. Excited DBSs can be observed in photodetachment spectroscopy using a tunable laser. Tuning the detachment laser to above-threshold vibrational resonances yields vibrationally enhanced resonant photoelectron spectra, which are highly non-Franck-Condon with much richer vibrational information. This perspective describes recent advances in the studies of excited DBSs of cryogenically cooled anions using high-resolution photoelectron imaging (PEI) and resonant photoelectron spectroscopy (rPES). The basic features of dipole-bound excited states and highly non-Franck-Condon resonant photoelectron spectra will be discussed. The power of rPES to yield rich vibrational information beyond conventional PES will be highlighted, especially for low-frequency and Franck-Condon-inactive vibrational modes, which are otherwise not accessible from non-resonant conventional PES. Mode-selectivity and intra-molecular rescattering have been observed during the vibrationally induced autodetachment. Conformer-specific rPES is possible due to the different dipole-bound excited states of molecular conformers with polar neutral cores. For molecules with μ ≪ 2.5 D or without dipole moments, but large quadrupole moments, excited quadrupole-bound states can exist, which can also be used to conduct rPES.
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Affiliation(s)
- Guo-Zhu Zhu
- Department of Chemistry , Brown University , Providence , RI 02912 , USA .
| | - Lai-Sheng Wang
- Department of Chemistry , Brown University , Providence , RI 02912 , USA .
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72
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Racow EE, Kreinbihl JJ, Cosby AG, Yang Y, Pandey A, Boros E, Johnson CJ. General Approach to Direct Measurement of the Hydration State of Coordination Complexes in the Gas Phase: Variable Temperature Mass Spectrometry. J Am Chem Soc 2019; 141:14650-14660. [DOI: 10.1021/jacs.9b05874] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Emily E. Racow
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York 11790, United States
| | - John J. Kreinbihl
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York 11790, United States
| | - Alexia G. Cosby
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York 11790, United States
| | - Yi Yang
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York 11790, United States
| | - Apurva Pandey
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York 11790, United States
| | - Eszter Boros
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York 11790, United States
| | - Christopher J. Johnson
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York 11790, United States
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73
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Zhu GZ, Cheung LF, Liu Y, Qian CH, Wang LS. Resonant Two-Photon Photoelectron Imaging and Intersystem Crossing from Excited Dipole-Bound States of Cold Anions. J Phys Chem Lett 2019; 10:4339-4344. [PMID: 31314535 DOI: 10.1021/acs.jpclett.9b01743] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We report the observation of a dipole-bound state (DBS) 659 cm-1 below the electron detachment threshold of cryogenically cooled deprotonated 4,4'-biphenol anion (bPh-) and 19 of its lowest vibrational levels. Resonant two-photon photoelectron imaging (R2P-PEI) via the vibrational levels of the DBS displays a sharp peak with a constant binding energy. This observation indicates vertical detachment from the vibrational levels of the DBS to the corresponding neutral levels with the conservation of the vibrational energy, suggesting that the highly diffuse electron in the DBS has little effect on the neutral core. The R2P-PEI spectra also exhibit two features at lower binding energies, which come from intersystem crossings from the DBS to two lower-lying valence-bound triplet excited states of bPh-. The current study discloses the first R2P-PEI spectra from vibrational excited states of a DBS and direct spectroscopic evidence of transitions from a DBS to valence-bound states of anions.
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Affiliation(s)
- Guo-Zhu Zhu
- Department of Chemistry , Brown University , Providence , Rhode Island 02912 , United States
| | - Ling Fung Cheung
- Department of Chemistry , Brown University , Providence , Rhode Island 02912 , United States
| | - Yuan Liu
- Department of Chemistry , Brown University , Providence , Rhode Island 02912 , United States
| | - Chen-Hui Qian
- 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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74
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Li Z, Hu Z, Jiang Y, Yuan Q, Sun H, Wang XB, Sun Z. Electronic structures and binding motifs of sodium polysulfide clusters NaS n - (n = 5-9): A joint negative ion photoelectron spectroscopy and computational investigation. J Chem Phys 2019; 150:244305. [PMID: 31255059 DOI: 10.1063/1.5100733] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
We report a joint experimental and computational study on the electronic and geometric structures of a series of NaSn - (n = 5-9) clusters. Cryogenic, size-selective, negative ion photoelectron spectroscopy was employed to obtain their photoelectron spectra, in which distinctive spectral features with electron binding energy (EBE) up to 6.4 eV are unraveled. The EBE of the first peak in each spectrum for NaSn - (n = 5-9), assigned to the transition from the ground state of the anion to the ground state of each neutral radical, was observed to increase with cluster size. The vertical detachment energies (VDEs), measured from the first peak maximum, are 3.43 ± 0.02, 3.57 ± 0.02, 3.82 ± 0.03, 3.86 ± 0.02, and 4.00 ± 0.02 eV, and the adiabatic detachment energies (ADEs), determined from the onset of the first peak, are 3.27 ± 0.05, 3.44 ± 0.05, 3.65 ± 0.05, 3.75 ± 0.05, and 3.93 ± 0.05 eV, for n = 5-9, respectively. A number of low-lying isomers of the anions were screened and identified with density functional theory calculations, showing a structural preference of a chainlike polysulfide moiety electrostatically interacting with a sodium cation for all of the clusters. The CCSD(T)/aug-cc-pVTZ calculated VDEs and ADEs are in excellent agreement with the experimental results, confirming the identified isomers. Further analyses based on excited-state transitions, molecular orbitals, and natural population charges were performed, to assign and reveal the nature of all observed spectral bands. These computational results suggest that the electron detachment process and observed excitations are mainly derived from the polysulfide chain within each NaSn - cluster. This work provides a fundamental understanding of the intrinsic molecular properties of sodium polysulfide systems, which widely exist in life science and sodium-sulfur cells.
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Affiliation(s)
- Zhipeng Li
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
| | - Zhubin Hu
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
| | - Yanrong Jiang
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
| | - Qinqin Yuan
- Physical Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Boulevard, P.O. Box 999, Richland, Washington 99352, USA
| | - Haitao Sun
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
| | - Xue-Bin Wang
- Physical Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Boulevard, P.O. Box 999, Richland, Washington 99352, USA
| | - Zhenrong Sun
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
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75
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Zhu G, Qian C, Wang L. Tautomer‐Specific Resonant Photoelectron Imaging of Deprotonated Cytosine Anions. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201903444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Guo‐Zhu Zhu
- Department of Chemistry Brown University Providence RI 02912 USA
| | - Chen‐Hui Qian
- Department of Chemistry Brown University Providence RI 02912 USA
| | - Lai‐Sheng Wang
- Department of Chemistry Brown University Providence RI 02912 USA
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76
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Zhu G, Qian C, Wang L. Tautomer‐Specific Resonant Photoelectron Imaging of Deprotonated Cytosine Anions. Angew Chem Int Ed Engl 2019; 58:7856-7860. [DOI: 10.1002/anie.201903444] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Guo‐Zhu Zhu
- Department of ChemistryBrown University Providence RI 02912 USA
| | - Chen‐Hui Qian
- Department of ChemistryBrown University Providence RI 02912 USA
| | - Lai‐Sheng Wang
- Department of ChemistryBrown University Providence RI 02912 USA
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77
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Zeng HJ, Yang N, Johnson MA. Introductory lecture: advances in ion spectroscopy: from astrophysics to biology. Faraday Discuss 2019; 217:8-33. [PMID: 31094388 DOI: 10.1039/c9fd00030e] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This introduction provides a historical context for the development of ion spectroscopy over the past half century by following the evolution of experimental methods to the present state-of-the-art. Rather than attempt a comprehensive review, we focus on how early work on small ions, carried out with fluorescence, direct absorption, and photoelectron spectroscopy, evolved into powerful technologies that can now address complex chemical problems ranging from catalysis to biophysics. One of these developments is the incorporation of cooling and temperature control to enable the general application of "messenger tagging" vibrational spectroscopy, first carried out using ionized supersonic jets and then with buffer gas cooling in radiofrequency ion traps. Some key advances in the application of time-resolved pump-probe techniques to follow ultrafast dynamics are also discussed, as are significant benchmarks in the refinement of ion mobility to allow spectroscopic investigation of large biopolymers with well-defined shapes. We close with a few remarks on challenges and opportunities to explore molecular level mechanics that drive macroscopic behavior.
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Affiliation(s)
- Helen J Zeng
- Sterling Chemistry Laboratory, Yale University, New Haven, CT 06520, USA.
| | - Nan Yang
- Sterling Chemistry Laboratory, Yale University, New Haven, CT 06520, USA.
| | - Mark A Johnson
- Sterling Chemistry Laboratory, Yale University, New Haven, CT 06520, USA.
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78
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Shen BB, Lunny KG, Benitez Y, Continetti RE. Photoelectron-Photofragment Coincidence Spectroscopy With Ions Prepared in a Cryogenic Octopole Accumulation Trap: Collisional Excitation and Buffer Gas Cooling. Front Chem 2019; 7:295. [PMID: 31114785 PMCID: PMC6503059 DOI: 10.3389/fchem.2019.00295] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 04/10/2019] [Indexed: 11/17/2022] Open
Abstract
A cryogenic octopole accumulation trap (COAT) has been coupled to a photoelectron-photofragment coincidence (PPC) spectrometer allowing for improved control over anion vibrational excitation. The anions are heated and cooled via collisions with buffer gas <17 K. Shorter trapping times (500 μs) prevent thermalization and result in anions with high internal excitation while longer trapping times (80 ms) at cryogenic temperatures thermalize the ions to the temperature of the buffer gas. The capabilities of the COAT are demonstrated using PPC spectroscopy ofO 3 - at 388 nm (Ehν = 3.20 eV). Cooling the precursor anions with COAT resulted in the elimination of the autodetachment of vibrationally excitedO 2 - produced by the photodissociationO 3 - + hν → O +O 2 - (v ≥ 4). Under heating conditions, a lower limit temperature for the anions was determined to be 1,500 K through Franck-Condon simulations of the photodetachment spectrum ofO 3 - , considering a significant fraction of the ions undergo photodissociation in competition with photodetachment. The ability to cool or heat ions by varying ion injection and trapping duration in COAT provides a new flexibility for studying the spectroscopy of cold ions as well as thermally activated processes.
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Affiliation(s)
| | | | | | - Robert E. Continetti
- Department of Chemistry and Biochemistry, University of California, San Diego, San Diego, CA, United States
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79
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Aprà E, Warneke J, Xantheas SS, Wang XB. A benchmark photoelectron spectroscopic and theoretical study of the electronic stability of [B12H12]2−. J Chem Phys 2019; 150:164306. [DOI: 10.1063/1.5089510] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Affiliation(s)
- Edoardo Aprà
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P. O. Box 999, Richland, Washington 99352, USA
| | - Jonas Warneke
- Physical Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Boulevard, P.O. Box 999, MSIN K8-88, Richland, Washington 99352, USA
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, USA
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnestr. 2, 04103 Leipzig, Germany
| | - Sotiris S. Xantheas
- Advanced Computing, Mathematics and Data Division, Pacific Northwest National Laboratory, 902 Battelle Boulevard, P.O. Box 999, MS K1-83, Richland, Washington 99352, USA
- Department of Chemistry, University of Washington, Seattle, Washington 98195, USA
| | - Xue-Bin Wang
- Physical Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Boulevard, P.O. Box 999, MSIN K8-88, Richland, Washington 99352, USA
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80
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Abstract
Chemically binding to argon (Ar) at room temperature has remained the privilege of the most reactive electrophiles, all of which are cationic (or even dicationic) in nature. Herein, we report a concept for the rational design of anionic superelectrophiles that are composed of a strong electrophilic center firmly embedded in a negatively charged framework of exceptional stability. To validate our concept, we synthesized the percyano-dodecoborate [B12(CN)12]2-, the electronically most stable dianion ever investigated experimentally. It serves as a precursor for the generation of the monoanion [B12(CN)11]-, which indeed spontaneously binds Ar at 298 K. Our mass spectrometric and spectroscopic studies are accompanied by high-level computational investigations including a bonding analysis of the exceptional B-Ar bond. The detection and characterization of this highly reactive, structurally stable anionic superelectrophile starts another chapter in the metal-free activation of particularly inert compounds and elements.
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81
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Fu XX, Tang RL, Lu YZ, Ning CG. Measurement of electron affinity of atomic lutetium via the cryo-SEVI Method. CHINESE J CHEM PHYS 2019. [DOI: 10.1063/1674-0068/cjcp1812293] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Xiao-xi Fu
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 10084, China
| | - Ru-lin Tang
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 10084, China
| | - Yu-zhu Lu
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 10084, China
| | - Chuan-gang Ning
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 10084, China
- Collaborative Innovation Center of Quantum Matter, Beijing 100084, China
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82
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Yang Z, Hrovat DA, Hou GL, Borden WT, Wang XB. Negative Ion Photoelectron Spectroscopy Confirms the Prediction of a Singlet Ground State for the 1,8-Naphthoquinone Diradical. J Phys Chem A 2019; 123:3142-3148. [DOI: 10.1021/acs.jpca.8b11063] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zheng Yang
- Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, MS K8-88, Richland, Washington 99352, United States
| | - David A. Hrovat
- Department of Chemistry and the Center for Advanced, Scientific Computing and Modeling, University of North Texas, 1155 Union Circle, #305070, Denton, Texas 76203-5070, United States
| | - Gao-Lei Hou
- Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, MS K8-88, Richland, Washington 99352, United States
| | - Weston Thatcher Borden
- Department of Chemistry and the Center for Advanced, Scientific Computing and Modeling, University of North Texas, 1155 Union Circle, #305070, Denton, Texas 76203-5070, United States
| | - Xue-Bin Wang
- Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, MS K8-88, Richland, Washington 99352, United States
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83
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Fujihara A, Shimada A. Gas-phase N2 adsorption on mass-selected hydrogen-bonded cluster ions. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.01.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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84
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Tang R, Fu X, Lu Y, Ning C. Ground-State Pd Anions React with H 2 Much Faster than the Excited Pd Anions. J Phys Chem Lett 2019; 10:702-706. [PMID: 30698969 DOI: 10.1021/acs.jpclett.8b03859] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Recent advances in experimental techniques have made it relatively easy to prepare reactant cations in well-defined states of electronic excitation. Extensive studies on the role of excited states in the cation-neutral reactions have contributed significantly to our understanding of reaction kinetics and dynamics. The excited states are often more reactive than the ground state. However, the reactions involving the excited atomic anion are very rare because the negative ions usually have no bound excited states. In the present work, we report the state-specific reaction of Pd anions with H2. Surprisingly, we observed that the ground-state Pd anions react with H2 10 times faster than the excited Pd anions. The high-level calculations show that the difference is due to the reaction barrier.
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Affiliation(s)
- Rulin Tang
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics , Tsinghua University , Beijing 100084 , China
| | - Xiaoxi Fu
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics , Tsinghua University , Beijing 100084 , China
| | - Yuzhu Lu
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics , Tsinghua University , Beijing 100084 , China
| | - Chuangang Ning
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics , Tsinghua University , Beijing 100084 , China
- Collaborative Innovation Center of Quantum Matter , Beijing 100084 , China
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85
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Bischoff LA, Drisch M, Kerpen C, Hennig PT, Landmann J, Sprenger JAP, Bertermann R, Grüne M, Yuan Q, Warneke J, Wang X, Ignat'ev NV, Finze M. Cyanohydridoborate Anions: Synthesis, Salts, and Low‐Viscosity Ionic Liquids. Chemistry 2019; 25:3560-3574. [DOI: 10.1002/chem.201804698] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 12/09/2018] [Indexed: 02/03/2023]
Affiliation(s)
- Lisa A. Bischoff
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Michael Drisch
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Christoph Kerpen
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Philipp T. Hennig
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Johannes Landmann
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Jan A. P. Sprenger
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Rüdiger Bertermann
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Matthias Grüne
- Institut für Organische Chemie & Center for Nanosystems Chemistry Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
| | - Qinqin Yuan
- Physical Sciences Division Pacific Northwest National Laboratory 902 Battelle Boulevard, P.O. Box 999, MSIN K8-88 Richland WA 99352 USA
| | - Jonas Warneke
- Department of Chemistry Purdue University 560 Oval Drive West Lafayette IN 47907 USA
| | - Xue‐Bin Wang
- Physical Sciences Division Pacific Northwest National Laboratory 902 Battelle Boulevard, P.O. Box 999, MSIN K8-88 Richland WA 99352 USA
| | - Nikolai V. Ignat'ev
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
- Consultant Merck KGaA 64293 Darmstadt Germany
| | - Maik Finze
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Germany
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86
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Schwarz H, Asmis KR. Identification of Active Sites and Structural Characterization of Reactive Ionic Intermediates by Cryogenic Ion Trap Vibrational Spectroscopy. Chemistry 2019; 25:2112-2126. [PMID: 30623993 DOI: 10.1002/chem.201805836] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 01/07/2019] [Indexed: 01/02/2023]
Abstract
Cryogenic ion trap vibrational spectroscopy paired with quantum chemistry currently represents the most generally applicable approach for the structural investigation of gaseous cluster ions that are not amenable to direct absorption spectroscopy. Here, we give an overview of the most popular variants of infrared action spectroscopy and describe the advantages of using cryogenic ion traps in combination with messenger tagging and vibrational predissociation spectroscopy. We then highlight a few recent studies that apply this technique to identify highly reactive ionic intermediates and to characterize their reactive sites. We conclude by commenting on future challenges and potential developments in the field.
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Affiliation(s)
- Helmut Schwarz
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Knut R Asmis
- Wilhelm-Ostwald Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstr. 2, 04103, Leipzig, Germany
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87
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Hua Z, Feng S, Zhou Z, Liang H, Chen Y, Zhao D. A cryogenic cylindrical ion trap velocity map imaging spectrometer. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2019; 90:013101. [PMID: 30709209 DOI: 10.1063/1.5079264] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 12/15/2018] [Indexed: 06/09/2023]
Abstract
A cryogenic cylindrical ion trap velocity map imaging spectrometer has been developed to study photodissociation spectroscopy and dynamics of gaseous molecular ions and ionic complexes. A cylindrical ion trap made of oxygen-free copper is cryogenically cooled down to ∼7 K by using a closed cycle helium refrigerator and is coupled to a velocity map imaging (VMI) spectrometer. The cold trap is used to cool down the internal temperature of mass selected ions and to reduce the velocity spread of ions after extraction from the trap. For CO2 + ions, a rotational temperature of ∼12 K is estimated from the recorded [1 + 1] two-photon dissociation spectrum, and populations in spin-orbit excited X2Πg,1/2 and vibrationally excited states of CO2 + are found to be non-detectable, indicating an efficient internal cooling of the trapped ions. Based on the time-of-flight peak profile and the image of N3 +, the velocity spread of the ions extracted from the trap, both radially and axially, is interpreted as approximately ±25 m/s. An experimental image of fragmented Ar+ from 307 nm photodissociation of Ar2 + shows that, benefitting from the well-confined velocity spread of the cold Ar2 + ions, a VMI resolution of Δv/v ∼ 2.2% has been obtained. The current instrument resolution is mainly limited by the residual radial speed spread of the parent ions after extraction from the trap.
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Affiliation(s)
- Zefeng Hua
- CAS Center for Excellence in Quantum Information and Quantum Physics, Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Shaowen Feng
- CAS Center for Excellence in Quantum Information and Quantum Physics, Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Zhengfang Zhou
- CAS Center for Excellence in Quantum Information and Quantum Physics, Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Hao Liang
- CAS Center for Excellence in Quantum Information and Quantum Physics, Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Yang Chen
- CAS Center for Excellence in Quantum Information and Quantum Physics, Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
| | - Dongfeng Zhao
- CAS Center for Excellence in Quantum Information and Quantum Physics, Hefei National Laboratory for Physical Sciences at the Microscale, and Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China
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88
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Warneke J, Konieczka SZ, Hou GL, Aprà E, Kerpen C, Keppner F, Schäfer TC, Deckert M, Yang Z, Bylaska EJ, Johnson GE, Laskin J, Xantheas SS, Wang XB, Finze M. Properties of perhalogenated {closo-B10} and {closo-B11} multiply charged anions and a critical comparison with {closo-B12} in the gas and the condensed phase. Phys Chem Chem Phys 2019; 21:5903-5915. [DOI: 10.1039/c8cp05313h] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Dependence of electronic properties and reactivity of closo-borates with size and halogen substituent was investigated.
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89
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Nguyen DT, Fujihara A. Chiral Recognition in Cold Gas-Phase Cluster Ions of Carbohydrates and Tryptophan Probed by Photodissociation. ORIGINS LIFE EVOL B 2018; 48:395-406. [PMID: 30953250 DOI: 10.1007/s11084-019-09574-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Accepted: 03/19/2019] [Indexed: 12/20/2022]
Abstract
Chiral recognition between tryptophan (Trp) and carbohydrates such as D-glucose (D-Glc), methyl-α-D-glucoside (D-glucoside), D-maltose, and D-cellobiose in cold gas-phase cluster ions was investigated as a model for chemical evolution in interstellar molecular clouds using a tandem mass spectrometer containing a cold ion trap. The photodissociation mass spectra of cold gas-phase clusters that contained Na+, Trp enantiomers, and D-maltose showed that Na+(D-Glc) was formed via the glycosidic bond cleavage of D-maltose from photoexcited homochiral Na+(D-Trp)(D-maltose), while the dissociation did not occur in heterochiral Na+(L-Trp)(D-maltose). The enantiomer-selective dissociation was also observed in the case of D-cellobiose. The enantiomer-selective glycosidic bond cleavage of disaccharides suggested that photoexcited D-Trp could prevent chemical evolution of sugar chains from D-enantiomer of carbohydrates in molecular clouds. The spectra of gas-phase clusters that contained Na+, Trp enantiomers, and D-Glc indicated that enantiomer-selective protonation of L-Trp from D-Glc could induce enantiomeric excess via collision-activated dissociation of the protonated L-Trp. In the case of protonated clusters, photoexcited H+(L-Trp) dissociated via Cα-Cβ bond cleavage in the presence of D-Glc or D-glucoside, where the excited states of H+(L-Trp) contributed to the enantiomer-selective reaction in the clusters. These enantiomer selectivities in cold gas-phase clusters indicated that chirality of a molecule induced enantiomeric excess of other molecules via enantiomer-selective reactions in molecular clouds.
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Affiliation(s)
- Doan Thuc Nguyen
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Osaka, 599-8531, Japan
| | - Akimasa Fujihara
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Osaka, 599-8531, Japan.
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90
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Tesler LF, Cismesia AP, Bell MR, Bailey LS, Polfer NC. Operation and Performance of a Mass-Selective Cryogenic Linear Ion Trap. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2018; 29:2115-2124. [PMID: 30062479 PMCID: PMC6301008 DOI: 10.1007/s13361-018-2026-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 06/26/2018] [Accepted: 06/27/2018] [Indexed: 06/08/2023]
Abstract
We report on the performance of a cryogenic 2D linear ion trap (cryoLIT) that is shown to be mass-selective in the temperature range of 17-295 K. As the cryoLIT is cooled, the ejection voltages during the mass instability scan decrease, which results in an effective mass shift to lower m/z relative to room temperature. This is attributed to a decrease in trap radius caused by thermal contraction. Additionally, the cryoLIT generates reproducible mass spectra from day-to-day, and is capable of performing stored waveform inverse Fourier transform (SWIFT) mass isolation of fragile N2-tagged ions for the purpose of background-free infrared dissociation spectroscopy. Graphical Abstract ᅟ.
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Affiliation(s)
- Larry F Tesler
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL, 32611-7200, USA
| | - Adam P Cismesia
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL, 32611-7200, USA
| | - Matthew R Bell
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL, 32611-7200, USA
| | - Laura S Bailey
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL, 32611-7200, USA
| | - Nicolas C Polfer
- Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, FL, 32611-7200, USA.
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91
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Zhu GZ, Qian CH, Wang LS. Dipole-bound excited states and resonant photoelectron imaging of phenoxide and thiophenoxide anions. J Chem Phys 2018; 149:164301. [DOI: 10.1063/1.5049715] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Affiliation(s)
- Guo-Zhu Zhu
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, USA
| | - Chen-Hui Qian
- 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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92
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Tang R, Fu X, Ning C. Accurate electron affinity of Ti and fine structures of its anions. J Chem Phys 2018; 149:134304. [DOI: 10.1063/1.5049629] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Affiliation(s)
- Rulin Tang
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 10084, China
| | - Xiaoxi Fu
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 10084, China
| | - Chuangang Ning
- Department of Physics, State Key Laboratory of Low-Dimensional Quantum Physics, Tsinghua University, Beijing 10084, China
- Collaborative Innovation Center of Quantum Matter, Beijing, China
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93
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Yuan QQ, Yang Z, Li RZ, Transue WJ, Li ZP, Jiang L, Govind N, Cummins CC, Wang XB. Magnetic-Bottle and velocity-map imaging photoelectron spectroscopy of APS− (A=C14H10 or anthracene): Electron structure, spin-orbit coupling of APS•, and dipole-bound state of APS−. CHINESE J CHEM PHYS 2018. [DOI: 10.1063/1674-0068/31/cjcp1805114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Qin-qin Yuan
- Physical Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Boulevard, P. O. Box 999, MS K8-88, Richland, Washington 99352, USA
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zheng Yang
- Physical Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Boulevard, P. O. Box 999, MS K8-88, Richland, Washington 99352, USA
| | - Ren-zhong Li
- Physical Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Boulevard, P. O. Box 999, MS K8-88, Richland, Washington 99352, USA
| | - Wesley J. Transue
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Zhi-peng Li
- Physical Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Boulevard, P. O. Box 999, MS K8-88, Richland, Washington 99352, USA
| | - Ling Jiang
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Niranjan Govind
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P. O. Box 999, MS K8-91, Richland WA 99352, USA
| | - Christopher C. Cummins
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Xue-Bin Wang
- Physical Sciences Division, Pacific Northwest National Laboratory, 902 Battelle Boulevard, P. O. Box 999, MS K8-88, Richland, Washington 99352, USA
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94
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Garand E. Spectroscopy of Reactive Complexes and Solvated Clusters: A Bottom-Up Approach Using Cryogenic Ion Traps. J Phys Chem A 2018; 122:6479-6490. [DOI: 10.1021/acs.jpca.8b05712] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Etienne Garand
- Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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95
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Zhu GZ, Liu Y, Hashikawa Y, Zhang QF, Murata Y, Wang LS. Probing the interaction between the encapsulated water molecule and the fullerene cages in H 2O@C 60- and H 2O@C 59N . Chem Sci 2018; 9:5666-5671. [PMID: 30062000 PMCID: PMC6050629 DOI: 10.1039/c8sc01031e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Accepted: 06/02/2018] [Indexed: 12/21/2022] Open
Abstract
We report a high-resolution photoelectron imaging study of cryogenically-cooled H2O@C60- and H2O@C59N- endohedral fullerene anions. The electron affinity (EA) of H2O@C60 is measured to be 2.6923 ± 0.0008 eV, which is 0.0088 eV higher than the EA of C60, while the EA of H2O@C59N is measured to be 3.0058 eV ± 0.0007 eV, which is 0.0092 eV lower than the EA of C59N. The opposite shifts are found to be due to the different electrostatic interactions between the encapsulated water molecule and the fullerene cages in the two systems. There is a net coulombic attraction between the guest and host in H2O@C60-, but a repulsive interaction in H2O@C59N-. We have also observed low-frequency features in the photoelectron spectra tentatively attributed to the hindered rotational excitations of the encapsulated H2O molecule, providing further insights into the guest-host interactions in H2O@C60- and H2O@C59N-.
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Affiliation(s)
- Guo-Zhu Zhu
- Department of Chemistry , Brown University , Providence , Rhode Island 02912 , USA .
| | - Yuan Liu
- Department of Chemistry , Brown University , Providence , Rhode Island 02912 , USA .
| | - Yoshifumi Hashikawa
- Institute for Chemical Research , Kyoto University , Uji , Kyoto 611-0011 , Japan
| | - Qian-Fan Zhang
- Department of Chemistry , Brown University , Providence , Rhode Island 02912 , USA .
| | - Yasujiro Murata
- Institute for Chemical Research , Kyoto University , Uji , Kyoto 611-0011 , Japan
| | - Lai-Sheng Wang
- Department of Chemistry , Brown University , Providence , Rhode Island 02912 , USA .
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96
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Hou GL, Lin W, Wang XB. Direct Observation of Hierarchic Molecular Interactions Critical to Biogenic Aerosol Formation. Commun Chem 2018. [DOI: 10.1038/s42004-018-0038-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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97
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Qin Z, Hou GL, Yang Z, Valiev M, Wang XB. Negative ion photoelectron spectra of ISO 3-, IS 2O 3-, and IS 2O 4- intermediates formed in interfacial reactions of ozone and iodide/sulfite aqueous microdroplets. J Chem Phys 2018; 145:214310. [PMID: 28799338 DOI: 10.1063/1.4969076] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Three short-lived, anionic intermediates, ISO3-, IS2O3-, and IS2O4-, are detected during reactions between ozone and aqueous iodine/sulfur oxide microdroplets. These species may play an important role in ozone-driven inorganic aerosol formation; however their chemical properties remain largely unknown. This is the issue addressed in this work using negative ion photoelectron spectroscopy (NIPES) and ab initio modeling. The NIPE spectra reveal that all of the three anionic species are characterized by high adiabatic detachment energies (ADEs) - 4.62 ± 0.10, 4.52 ± 0.10, and 4.60 ± 0.10 eV for ISO3-, IS2O3-, and IS2O4-, respectively. Vibrational progressions with frequencies assigned to the S-O symmetric stretching modes are discernable in the ground state transition features. Density functional theory calculations show the presence of several low-lying isomers involving different bonding scenarios. Further analysis based on high level CCSD(T) calculations reveal that the lowest energy structures are characterized by the formation of I-S and S-S bonds and can be structurally viewed as SO3 linked with I, IS, and ISO for ISO3-, IS2O3-, and IS2O4-, respectively. The calculated ADEs and vertical detachment energies are in excellent agreement with the experimental results, further supporting the identified minimum energy structures. The obtained intrinsic molecular properties of these anionic intermediates and neutral radicals should be useful to help understand their photochemical reactions in the atmosphere.
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Affiliation(s)
- Zhengbo Qin
- Optoelectric Materials Science and Technology Laboratory, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Gao-Lei Hou
- Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, MS K8-88, Richland, Washington 99352, USA
| | - Zheng Yang
- Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, MS K8-88, Richland, Washington 99352, USA
| | - Marat Valiev
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, 902 Battelle Boulevard, P.O. Box 999, Richland, Washington 99352, USA
| | - Xue-Bin Wang
- Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, MS K8-88, Richland, Washington 99352, USA
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98
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Yang Z, Hrovat DA, Hou GL, Borden WT, Wang XB. Negative Ion Photoelectron Spectroscopy Confirms the Prediction of the Relative Energies of the Low-Lying Electronic States of 2,7-Naphthoquinone. J Phys Chem A 2018; 122:4838-4844. [PMID: 29745661 DOI: 10.1021/acs.jpca.8b03239] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cryogenic negative ion photoelectron (NIPE) spectra of the radical anion of 2,7-naphthoquinone (NQ•-) have been taken at 20 K, using 193, 240, 266, 300, and 355 nm lasers for electron detachment. The electron affinity of the NQ diradical is determined from the first resolved peak in the NIPE spectrum to be 2.880 ± 0.010 eV. CASPT2/aug-cc-pVDZ calculations predict with reasonable accuracy the positions of the 0-0 bands in the three lowest electronic states of NQ. In addition, the Franck-Condon factors calculated from the CASPT2/aug-cc-pVDZ optimized geometries, vibrational frequencies, and normal modes successfully simulate the vibrational structures in these bands. The NIPE spectrum of NQ•- confirms that, as predicted, 3B2 is the ground state, and the 1B2 and 1A1 states are, respectively, 12.7 and 16.4 kcal/mol higher in energy than the triplet ground state. The experimental value of Δ EST = 12.7 kcal/mol in NQ and the finding that 1B2 is the lower energy of the two singlet states confirm the results of the previous calculations on NQ. These calculations predicted an increase in Δ EST on the substitution of both methylene groups in 2,7-naphthoquinodimethane (NQDM) by oxygens in NQ, thus providing a dramatic contrast to the decrease of 17.5 kcal/mol in Δ EST found for substitution of one methylene group by one oxygen on going from trimethylenemethane (TMM) to oxyallyl (OXA).
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Affiliation(s)
- Zheng Yang
- Physical Sciences Division , Pacific Northwest National Laboratory , P.O. Box 999, MS K8-88, Richland , Washington 99352 , United States
| | - David A Hrovat
- Department of Chemistry and the Center for Advanced, Scientific Computing and Modeling , University of North Texas , 1155 Union Circle, #305070 , Denton , Texas 76203-5070 , United States
| | - Gao-Lei Hou
- Physical Sciences Division , Pacific Northwest National Laboratory , P.O. Box 999, MS K8-88, Richland , Washington 99352 , United States
| | - Weston Thatcher Borden
- Department of Chemistry and the Center for Advanced, Scientific Computing and Modeling , University of North Texas , 1155 Union Circle, #305070 , Denton , Texas 76203-5070 , United States
| | - Xue-Bin Wang
- Physical Sciences Division , Pacific Northwest National Laboratory , P.O. Box 999, MS K8-88, Richland , Washington 99352 , United States
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99
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Jena P, Sun Q. Super Atomic Clusters: Design Rules and Potential for Building Blocks of Materials. Chem Rev 2018; 118:5755-5870. [DOI: 10.1021/acs.chemrev.7b00524] [Citation(s) in RCA: 302] [Impact Index Per Article: 50.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Puru Jena
- Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284-2000, United States
| | - Qiang Sun
- Physics Department, Virginia Commonwealth University, Richmond, Virginia 23284-2000, United States
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100
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Gerlich D. Infrared spectroscopy of cold trapped molecular ions using He-tagging. J CHIN CHEM SOC-TAIP 2018. [DOI: 10.1002/jccs.201800122] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Dieter Gerlich
- Department of Physics; University of Technology; Chemnitz Germany
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