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luozhonghua½ð³æ (СÓÐÃûÆø)
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Éó¸åÈ˽¨Ò齫ժҪÖеÄÓйØÊý¾ÝÊ¡ÂÔµô£¬ÕâÑùÐÐÂ𣿠ÔÀ´µÄ in the presence of polyphosphoric acid as activator, in yields ranging from 81 % to 88 %. The bisbenzimidazoles are thermally robust with high decomposition temperatures (> 346 oC) and high melting transitions (323.9-462.7 oC). They emit blue light (¦ËEm max ¡Ö 401-423 nm) with fluorescence quantum yields of 0.42-0.98 in diluted N,N-dimethylformamide (DMF) solution. Electrochemistry studies indicate that they have a formal reduction potential in the range of -1.44 to -1.55 V (versus the saturated calomel electrode) and estimated.... Éó¸åÈËÒª¸ÄµÄ£º 'in the presence of polyphosphoric acid in high yield. The bisbenzimidazoles are thermally robust with high decomposition temperatures and melting transitions. They emit blue light of ca. 410 nm with fluorescence quantum yields > 0.4 in solution. Electrochemical studies indicate that these new bisbenzimidazoles have a formal reduction potential in the range of -1.44 to -1.55 V and estimated....' These suggestions made to remove much of the numbers which the reader can find in the discussion. ÏÂÃæÕâ¾ä»°ÈçºÎÍêÕûÃèÊö£¨ÕªÒªÖв»ÄÜÓÐËõд´ÊµÄ£©£º They emit blue light of ca. 410 nm with fluorescence quantum yields > 0.4 in solution. ca. ´óÔ¼µÄÒâ˼¡£ yields > 0.4 ÄÜÖ±½ÓÕâÑùдÂ𣿠|
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sunny128
Òø³æ (СÓÐÃûÆø)
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- ³æºÅ: 309744
- ×¢²á: 2006-12-23
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zehuac(½ð±Ò+1):лл²ÎÓë¹þ£¬Ï£ÍûÒÔºó¸ü¼Ó»ý¼«µÄÓ¦Öú 2010-06-17 08:36:27
luozhonghua(½ð±Ò+6, ·ÒëEPI+1): 2010-06-17 12:21:06
zehuac(½ð±Ò+1):лл²ÎÓë¹þ£¬Ï£ÍûÒÔºó¸ü¼Ó»ý¼«µÄÓ¦Öú 2010-06-17 08:36:27
luozhonghua(½ð±Ò+6, ·ÒëEPI+1): 2010-06-17 12:21:06
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In the presence of polyphosphoric acid in high yield. The bisbenzimidazoles WERE thermally robust with high decomposition temperatures and melting transitions. They emit blue light of ca. 410 nm with fluorescence quantum yields over 0.4 in solution. Electrochemical studies INDICATED that these new bisbenzimidazoles HAD a formal reduction potential in the range from -1.44 to -1.55 V and estimated....' These suggestions made to remove much of the numbers which the readers can find in the discussion. Õâ²»ÊÇÎÒµÄרҵ£¬¡¡ÎÒ×÷ÁËһЩÓï·¨µÄÐÞÕý¡£¡¡ÎÄÌåÒªÓйýȥʽ£¬¡¡ÕâÀïÎÒÓôóд×Öĸ±íʾÁË¡£ |
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