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长春师范学院 化学学院,吉林 长春,130032
收稿日期:2009-06-20,
修回日期:1900-01-02,
网络出版日期:2009-12-30,
纸质出版日期:2009-12-30
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岳淑美, 李 娜, 王彬彬, 等. 2-(2-吡啶基)苯并咪唑配合物的合成及发光[J]. 发光学报, 2009,30(6):852-857.
YUE Shu-mei, LI Na, WANG Bin-bin, et al. Syntheses, Properties of Luminescent Complexes with 2-(2-pyridyl)Benzimidazole Ligands[J]. Chinese journal of luminescence, 2009, 30(6): 852-857.
选用了具有代表性的过渡金属元素Cd、Zn以及主族元素Ca、Mg作为中心金属离子
合成了基于2-(2-吡啶基)苯并咪唑(PBM)配体的系列金属配合物。实验数据表明这些配合物是一类具有高的荧光量子产率并且化学性质稳定的蓝色发光材料。 研究了该类配合物的光致发光性质以及中心金属离子半径大小对配合物发射峰位的影响
比较了中性配合物、配阳离子型配合物的发光性质以及这类金属离子微扰配体发光受其因素的影响。
It is well known that blue-emitting materials are so important to organic light-emitting diodes for the purpose of full color display. However
up to now
excellent blue-emitting materials have been underdeve-loped and lacked variousness. In this report
we developed a new kind of material which can emit highly efficient blue light
with 2-(2- pyridine)benzimidazole as the ligand
and using representative main elements Mg
Ca and transition metal Zn
Cd as central ion. Highly luminescent complexes are successfully synthesized and excellent blue-emitting complexes are realized. They all display strongly blue emissions and high luminescence quantum efficiencies. The emission peak located at the deep blue region of 400~455 nm
with high photoluminescence quantum yields of 0.31~0.74. In addition
all the blue-emitting complexes with melting points of no less than 250 ℃ own high thermal stability. All these data suggested that these blue-emitting complexes are promising materials in the field of organic light emitting diodes. In order to get a further understan-ding on the factors that dominate the blue luminescence complexes
chemical means are used to adjust their emission peak position. Compared with neutral and ionic complexes
we came to a conclusion that the emissions are assigned to intraligand transitions of the deprotonated ligand. On the other hand
even though the metal ions do not participate the luminescence process
the metal ions in the complexes do play a key role in stabilizing the deprotonated ligand and promoting the luminescence. Considering the promising properties of these blue-emitting complexes
including their high PL efficiency
thermal stability and the blue PL spectra
it was believed that these complexes may find potential applications in the field of organic light-emitting diodes
and corresponding efforts are now being preceded.
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