Fukai Takeshi, Kimura Masaru
Okayama University Graduate School of Natural Science and Technology, Tsushima-Naka 3-1-1, Okayama 700-8530, Japan.
Luminescence. 2007 Mar-Apr;22(2):134-9. doi: 10.1002/bio.936.
A coupling reaction of 5-methylbenz[b]acridin-12(5H)-one (MBA) with Zn and TiCl(4) provided a red fluorescent (FL) compound, as opposed to 5,5'-dimethyl-12,12'-bibenzo[b]acridylidene (DMBBA), probably through photochemical cyclization and aromatization by dehydrogenation of the overcrowded intermediate DMBBA. The structure of the red FL compound was assigned to 7,20-dimethyl-7,20-dihydro-7,20-diaza-naphto[a]dibenzo[j,q]perylene (DANDBP) and the fluorescence efficiency for DANDBP was determined to be 0.23 +/- 0.01.
5-甲基苯并[b]吖啶-12(5H)-酮（MBA）与锌和四氯化钛发生偶联反应，生成了一种红色荧光化合物，这与5,5'-二甲基-12,12'-联苯并[b]吖啶（DMBBA）不同，可能是通过过度拥挤的中间体DMBBA的光化学环化和脱氢芳构化实现的。红色荧光化合物的结构被确定为7,20-二甲基-7,20-二氢-7,20-二氮杂萘并[a]二苯并[j,q]苝（DANDBP），并且测定出DANDBP的荧光效率为0.23±0.01。
