Formation of Polyynes C4H2, C6H2, C8H2, and C10H2 from Reactions of C2H, C4H, C6H, and C8H Radicals with C2H2

被引:27
|
作者
Sun, Yi-Lun [1 ]
Huang, Wen-Jian [1 ]
Lee, Shih-Huang [1 ]
机构
[1] Natl Synchrotron Radiat Res Ctr, Sci Res Div, Hsinchu 30076, Taiwan
来源
关键词
NEUTRAL-NEUTRAL REACTIONS; DYNAMICS; TEMPERATURES; ENVELOPES; DISCOVERY; ACETYLENE; CHEMISTRY; KINETICS; STARS; GAS;
D O I
10.1021/acs.jpclett.5b01910
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Some of the polyynes (HC2n+2H, 1 <= n <= 4) are observable in planetary atmospheres, interstellar space, and flames. Polyynes are proposed to play an important role in synthesis of large carbonaceous molecules. We explore the dynamics of reactions of C2nH (n = 1-4) radicals with C2H2 by interrogating time-of-flight spectra and photoionization efficiency spectra of products C2n+2H2. The reactions of n = 2-4 were investigated for the first time. The translational energy release is biased to low energy but extends to the energetic limit of product HC2n+2H + H, corresponding to a fraction of 0.34-0.36 on translational energy. Product C2n+2H2 has a deconvoluted ionization threshold in good agreement with the ionization energy of polyynes. The quantum chemical calculations support the experimental observations. This work verifies that the title reaction is an important source for formation of polyynes that have been observed in interstellar/circumstellar media and combustion processes.
引用
收藏
页码:4117 / 4122
页数:6
相关论文
共 50 条
  • [1] Formation of C9H2 and C10H2 from Reactions C3H + C6H2 and C4H + C6H2
    Sun, Yi-Lun
    Huang, Wen-Jian
    Lee, Shih-Huang
    [J]. JOURNAL OF PHYSICAL CHEMISTRY A, 2017, 121 (51): : 9687 - 9697
  • [2] Formations of C6H from reactions C3 + C3H2 and C3H + C3H and of C8H from reactions C4 + C4H2 and C4H + C4H
    Sun, Yi-Lun
    Huang, Wen-Jian
    Lee, Shih-Huang
    [J]. JOURNAL OF CHEMICAL PHYSICS, 2024, 160 (04):
  • [3] Photolytic hydrogenation of the polyynes C6H2, C8H2, C10H2, and C12H2 in n-hexane with 253.6 nm radiation
    Heymann, Dieter
    [J]. CARBON, 2009, 47 (03) : 909 - 911
  • [4] H atom yields from the reactions of CN radicals with C2H2, C2H4, C3H6, trans-2-C4H8, and iso-C4H8
    Gannon, Kelly L.
    Glowacki, David R.
    Blitz, Mark A.
    Hughes, Kevin J.
    Pilling, Michael J.
    Seakins, Paul W.
    [J]. JOURNAL OF PHYSICAL CHEMISTRY A, 2007, 111 (29): : 6679 - 6692
  • [5] Dynamics of the reaction of C2 with C6H2: An implication for the formation of interstellar C8H
    Sun, Yi-Lun
    Huang, Wen-Jian
    Chin, Chih-Hao
    Lee, Shih-Huang
    [J]. JOURNAL OF CHEMICAL PHYSICS, 2014, 141 (19):
  • [6] STUDIES ON THE REACTIONS - C2H+C2H2-]C4H2+H AND C2H+H2-]C2H2+H
    FUKUDA, K
    KOSHI, M
    MATSUI, H
    [J]. ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1991, 202 : 64 - FUEL
  • [7] EQUIVALENT ORBITALS OF C2H2 C2H4 AND C2H6
    TRINAJSTIC, N
    [J]. ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-LEIPZIG, 1967, 236 (5-6): : 369 - +
  • [8] SOME REACTIONS OF OXYGEN ATOMS .1. C2F4 C3F6 C2H2 C2H4 C3H6 1-C4H8 C2H6 C-C3H6 AND C3H8
    SAUNDERS, D
    HEICKLEN, J
    [J]. JOURNAL OF PHYSICAL CHEMISTRY, 1966, 70 (06): : 1950 - &
  • [9] Oxygen Atom Reactions with C2H6, C2H4, and C2H2 in Ices
    Bergner, Jennifer B.
    Oberg, Karin, I
    Rajappan, Mahesh
    [J]. ASTROPHYSICAL JOURNAL, 2019, 874 (02):
  • [10] Molecular dynamics simulations of C2, C2H, C2H2, C2H3, C2H4, C2H5, and C2H6 bombardment of diamond (111) surfaces
    Traskelin, P.
    Saresoja, O.
    Nordlund, K.
    [J]. JOURNAL OF NUCLEAR MATERIALS, 2008, 375 (02) : 270 - 274