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For example, most 9,10-bis(arylvinyl)anthracene derivatives exhibit unique aggregation-induced emission (AIE) and PFC behaviour related to the strongly twisted backbone conformations.8d,10c,11,25¨C30 Contrarily, planar 2,6-bis(arylvinyl)- anthracene derivatives show aggregation-quenched emission and non-PFC behaviour. Therefore, it is very interesting to know whether the center-crossed chromophores integrated by 2,6- and 9,10-bis(arylvinyl)anthracenes are AIE- and PFC-active since 2-D cross-conjugated cruciforms have many unique and interesting optical and optoelectronic properties.31 To the best of ourknowledge, there are no reports on the construction of cruciforms with AIE and/or PFC behaviour at present, and organic materials exhibiting chain length-dependent PFC behaviour are also scarce, although a number of organic ¬éfluorophores with chain length-dependent solid-state ¬éuorescence have been reported in the past few years.7,11a,25,30,32,33 In the current work, we have designed and synthesized a series of 2,6-bis(p-dialkylaminostyryl)- 9,10-distyrylanthracenes (FCn, Scheme 1) to examine emphatically the PFC behaviour and the effect of the Nalkyllength. |
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ÕæÇ¿±ØÊ¤: ½ð±Ò+1, лл 2014-09-15 16:22:04
zhangweiÕÂÞ±: ½ð±Ò+10, ·ÒëEPI+1, ¡ïÓаïÖú 2014-09-16 10:24:45
ÕæÇ¿±ØÊ¤: ½ð±Ò+1, лл 2014-09-15 16:22:04
zhangweiÕÂÞ±: ½ð±Ò+10, ·ÒëEPI+1, ¡ïÓаïÖú 2014-09-16 10:24:45
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