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题名: Ionization spectroscopies and theoretical calculations of cis and trans 3-fluoro-N-methylaniline-Ar-n(n=1,2) van der Waals clusters: Structures and binding energies
作者: Zhang, Lijuan1;  Li, Dazhi1;  Cheng, Min2;  Du, Yikui2;  Zhu, Qihe2
关键词: 3-Fluoro-N-methylaniline ;  Ar cluster ;  REMPI ;  MATI ;  Binding energy ;  DFT-D
刊名: SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
发表日期: 2017-08-05
DOI: 10.1016/j.saa.2017.04.023
卷: 183, 页:177-186
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Spectroscopy
研究领域[WOS]: Spectroscopy
英文摘要: The ab initio and dispersion-corrected density functional theory (DFT) calculations of the van der Waals (vdW) clusters of cis and trans 3-fluoro-N-methylaniline-Ar-n (3FNMA-Ar-n) (n = 1,2) predict that, for cis and trans 3FNMA-Ar-1 clusters, the pi-bound geometry with the Ar atom sitting over the ring is the global minimum in both neutral and cationic states, while for cis and trans 3FNMA-Ar-2 clusters, the [pi vertical bar pi]-bound sandwich structure with two Ar ligands occupying nearly equivalent pi-bound positions above and"below the ring plane is the global minimum. The vibronic spectra of cis and trans 3FNMA-Ar-1 clusters in the S1 state were recorded by using one color and two-color resonant two-photon ionization (R2PI) techniques, the comparison of which-yields an estimate of the binding energy of cluster in the S-1 state. It is found that the linear correlation between the redshift of the S-1 <- S-0 electronic transition energy (E-1) of cluster and the Ei of the monomer also holds for the Ar clusters of hetero-di-substituted aromatics. By recording the photoionization efficiency (PIE) curves and mass-analyzed threshold ionization (MATT) dissociation spectra of cis and trans 3FNMA-Ar-1 clusters, the ionization energies (IE) and binding energies of clusters in the D-0 state are obtained. The MATI spectra of the cis and trans 3FNMA-Ar-1 cations exhibit significant progressions of the vdW bending mode (br), indicating the structural changes of the clusters in the bending coordinate upon ionization. The combination of the three kinds of spectroscopic methods provides the binding energies of cis and trans 3FNMA-Ar-1 clusters in the S-0, S-1 and D-0 states with good accuracy, and the values estimated by dispersion-corrected DFT calculations compare well with the experimental results. From our studies, the omega B97X-D and TD-omega B97X-D methods using high quality basis set are recommended for studying the intermolecular interaction of such vdW clusters in the ground and excited states. (C) 2017 Elsevier B.V. All rights reserved.
关键词[WOS]: MASS-ANALYZED THRESHOLD ;  CENTER-DOT-AR ;  DETECTED INFRARED-SPECTROSCOPY ;  RESONANT 2-PHOTON IONIZATION ;  CH/PI-INTERACTION ;  GAS-PHASE ;  INTERMOLECULAR VIBRATIONS ;  ANILINE-AR ;  P-DIFLUOROBENZENE ;  COMPLEXES
语种: 英语
WOS记录号: WOS:000403130900024
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152233
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Binzhou Univ, Coll Chem & Chem Engn, Binzhou 256600, Shandong, Peoples R China
2.Chinese Acad Sci, Beijing Natl Lab Mol Sci, State Key Lab Mol React Dynam, Inst Chem, Beijing 100190, Peoples R China

Recommended Citation:
Zhang, Lijuan,Li, Dazhi,Cheng, Min,et al. Ionization spectroscopies and theoretical calculations of cis and trans 3-fluoro-N-methylaniline-Ar-n(n=1,2) van der Waals clusters: Structures and binding energies[J]. SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY,2017,183:177-186.
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