Acta Chimica Sinica ›› 2013, Vol. 71 ›› Issue (01): 75-80.DOI: 10.6023/A12090728 Previous Articles     Next Articles



李会学, 王晓峰, 李志锋, 潘素娟   

  1. 甘肃省新型分子材料设计与功能重点实验室 天水师范学院生命科学与化学学院 天水 741001
  • 投稿日期:2012-09-28 发布日期:2012-12-14
  • 通讯作者: 李会学
  • 基金资助:
    项目受天水师范学院新型分子材料设计与功能重点实验室和天水师范学院中青年教师科研基金(No. TSA1116)、天水师范学院重点学科和甘肃省教育厅科研基金(No. 1108-03)资助.

Theoretical Study on the Structure and Properties of Graphdiyne

Li Huixue, Wang Xiaofeng, Li Zhifeng, Pan Sujuan   

  1. Key Laboratory for New Molecule Design and Function of Gansu Education Department, College of Life Science and Chemistry, Tianshui Normal University, Tianshui 741001
  • Received:2012-09-28 Published:2012-12-14
  • Supported by:
    Project supported by the Key Laboratory for New Molecule Material Design and Function of Tianshui Normal University and the Scientific Research Projects of Young and Middle-aged in Tianshui Normal University (No. TSA1116), the Key Discipline of Tianshui Normal University, and the Fund of Educational Commission of Gansu Province (No. 1108-03).

The graphdiyne, as a new stable carbon allotrope, is expected to be widely applied to nanosciences and devices due to unique structure and properties. In this paper we investigated the structural parameters, Wiberg bond indices, and the aromaticity of graphdiyne at the B3LYP/6-31+G* level. The calculating results indicated all the p-electrons of the carbons were able to form delocalized π-bonds and all the lengths of C—C bonds were to become average. The aromaticity of all the benzene rings was stronger than the scalene hexagon due to more negative the nucleus independent chemical shift (NICS) value. The topological properties of the compound were in good agreement with those discussed in Wiberg Bond Orders. The LUMO bandwidth (0.27 eV) of the title compound was larger than the HOMO bandwidth (0.24 eV), it indicates that the graphdiyne should be n-type material. The calculation of the odd electrons by the broken symmetry method showed that the compound contains 3.6 effectively unpaired electrons and possesses enhanced chemical reactivity.

Key words: graphdiyne, aromaticity, Wiberg bond indices, AIM, odd electrons