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Fig. 2 presents the emission spectrums of 2(a, b), and Fig. 3 presents the emission spectrums of 3(aei) in tetrahydrofuran solution (1 105 M). Their excitation wavelengths were all fixed at 450 nm. It can be found that their intensity ofchromophores interacted with each other in a manner leading to a red-shift of these bischromophore compounds. As shown in Table 2, the maximal emission bands were all in the range of 520e540 nm. Comparing the fluorescence of 3a with 3e, 3d with 3i, it was found that they had similar fluorescence wavelengths. Then we concluded that different carbon chain groups at N-position of 1,8-naphthalimide had little influence on the excitation wavelengths. |
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Õų¬·å: ½ð±Ò+12, ·ÒëEPI+1 2012-04-26 19:14:02
Õų¬·å: ½ð±Ò+12, ·ÒëEPI+1 2012-04-26 19:14:02
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²»ºñµÀ£¬Õâ¶Î·ÒëÒѾ²»Ëã¶ÌÁË£¬12¸öbb£¿ Fig. 2 presents the emission spectrums of 2(a, b), and Fig. 3 presents the emission spectrums of 3(aei) in tetrahydrofuran solution (1 10 5 M). ͼ2Ϊ»¯ºÏÎï2µÄ·¢Éä¹âÆ×£¬Í¼3Ϊ»¯ºÏÎï3ÔÚËÄÇâß»à«ÈÜÒºµÄ·¢Éä¹âÆ×¡£Their excitation wavelengths were all fixed at 450 nm. ËüÃǵ路¢²¨³¤¾ùÔÚ450nm¡£It can be found that their intensity of chromophores interacted with each other in a manner leading to a red-shift of these bischromophore compounds.·¢É«ÍÅÇ¿¶ÈÏ໥×÷Ó㬵¼ÖÂÕâЩ˫·¢É«ÍÅ»¯ºÏÎï¹âÆ×ºìÒÆ¡£ As shown in Table 2, the maximal emission bands were all in the range of 520e540 nm. Èç±í2Ëùʾ£¬×î´ó·¢ÉäÆ×´ø¾ùλÓÚ520-540nm·¶Î§ÄÚ¡£Comparing the fluorescence of 3a with 3e, 3d with 3i, it was found that they had similar fluorescence wavelengths.·Ö±ð±È½Ï3aºÍ3e¡¢3dºÍ3iµÄÓ«¹âÆ×ͼ£¬¿É¼ûËüÃǾßÓÐÏàËÆµÄÓйز¨³¤¡£ Then we concluded that different carbon chain groups at N-position of 1,8-naphthalimide had little influence on the excitation wavelengths.ÓÚÊÇÎÒÃǵóö½áÂÛÈÏΪ£¬1,8-ÝÁ¶þ¼×õ£Ñǰ·NλÉÏ̼Á´¼¯ÍŵIJ»Í¬¶Ô¼¤·¢²¨³¤¼¸ÎÞÓ°Ïì¡£ |
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