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Citation: XU Guo-Liang. The Effect of Number on the Structural Properties for Carbon Molecular Wires C_n (n＝3～10) in Ground State[J]. Acta Physico-Chimica Sinica, ;2006, 22(06): 701-705. doi: 10.3866/PKU.WHXB20060611 shu

The Effect of Number on the Structural Properties for Carbon Molecular Wires C_n (n＝3～10) in Ground State

XU Guo-Liang

1.
College of Physics and Information Engineering, Henan Normal University, Xinxiang 453007, P. R. China

Received Date: 30 December 2005
Available Online: 31 May 2006

The electronic structural properties of Cn (n=3~10) molecular wires are investigated systemically using the B3LYP density functional method under the basis set 6-311++g** level. By the analysis about the calculated results, it can be found that because of the effect of delocalization, the ground state of carbon molecular wires Cn is singlet as n is odd number, whereas the triplet is the stable ground state of carbon molecular wires Cn as n is even number. Meanwhile, based on the obtained equilibrium structures in ground state, the polarizability, charge distribution and energy level distribution of carbon molecular wires have been investigated. At the same time, the relationship between high occupied molecular orbits EH (HOMO), low virtual molecular orbits EL(LOMO) and the number n of carbon molecular wires is determined, i. e., EHn－2 < EHn < EHn+2, ELn－2 > ELn > ELn+2. Therefore, the fermi levels of carbon molecular wires display their own brand of odd-even alternation properties. The reason for these properties of carbon molecular wires is explained in present work.
- Carbon molecular wires;Electronic structure;Delocalization effect;Fermi level
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The Effect of Number on the Structural Properties for Carbon Molecular Wires C_n (n＝3～10) in Ground State