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From 3f, 3e, 3h and 3i whose emission wavelengths were 521, 523, 528 and 530 nm, it was found that they were redshifted. We concluded that groups at 3- and 5-position with electron-donating substituents such as methyl could lead to a red-shifted phenomenon, with electron-withdrawing ones could lead to a blue-shifted phenomenon. Meanwhile, when we compared these novel bischromophore compounds with other pyrazoline derivatives whose 1-position had phenyl, a red-shifted phenomenon was found. So it was concluded that the groups at both positions 1 and 3 had very strong influence on the emission fluorescence of these compounds. |
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爱与雨下: 金币+1 2012-04-26 21:48:03
爱与雨下: , 欢迎常来~！ 2012-04-26 21:48:10
张超峰: 金币+15, 翻译EPI+1 2012-04-27 07:44:09
爱与雨下: 金币+1 2012-04-26 21:48:03
爱与雨下: , 欢迎常来~！ 2012-04-26 21:48:10
张超峰: 金币+15, 翻译EPI+1 2012-04-27 07:44:09
| 可以观察到，激发波长分别为521,523,528,530 nm 的3f，3e, 3h 和3i 峰位置发生了红移。由此可以推断，在3号位和5号位的供电子基团（例如甲基）会引起红移现象，而吸电子基团会引起蓝移现象。同时，通过将这些新型双荧光团化合物和其他1号位上含有苯基的吡唑啉衍生物进行比较，也发现了红移现象。因此，我们推断1号位和3号位的基团能够对复合物的激发荧光效应产生强烈影响。 |
2楼2012-04-26 19:56:44