Photoelectric material including unit Imidazo[1,2-a]pyrimidine

碩士 === 國立中央大學 === 化學研究所 === 94 === Electron-deficent organic materials containing imidazole[1,2-a]- pyrimidine unit have been synthesized via C-C coupling at the C-2 and C-3 sites of imidazole[1,2-a]pyrimidine unit. These compounds emit from blue to green-blue and their quantum yields in toluene ran...

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Bibliographic Details
Main Authors: Kuan-Chi Chen, 陳冠吉
Other Authors: Jiann Tsuen Lin
Format: Others
Language:zh-TW
Published: 2006
Online Access:http://ndltd.ncl.edu.tw/handle/40768625725460588181
Description
Summary:碩士 === 國立中央大學 === 化學研究所 === 94 === Electron-deficent organic materials containing imidazole[1,2-a]- pyrimidine unit have been synthesized via C-C coupling at the C-2 and C-3 sites of imidazole[1,2-a]pyrimidine unit. These compounds emit from blue to green-blue and their quantum yields in toluene range from 4 to 50%. Based on the data from AC-2 measurement,and the 0-0 transition energy from UV spectra, the HOMO and LUMO energies were calculated to be 5.42 ~ 6.11 eV and 2.47 ~ 2.94 eV, respectively. The molecular structure of compounds 2, 3, 6 and 14 were confirmed by the single crystal X-ray structural determination. The crystal system of 2 is triclinic, that of all others is monoclinic. In the lattice of 3, there exists 9-9 interaction at a distance ~ 3.36 Å. However, such an interaction was found in the paired molecules only. In 6, C-H…9 interaction with a distance of 2.7 Å was observed. In comparison, compound 14 has interesting herringbone packing in the lattice. The 9-9 interaction distances for two different 9-channels are 3.34 Å and 3.39 Å, respectively.