【摘要】 通过三聚氯氰的可控亲核取代反应合成了一种含有2个萘荧光团和1个1,8-萘酰亚胺荧光团的新型荧光分子C41H34N6O4(简称NCBNT),通过FTIR、1H NMR、MS和元素分析表征了NCBNT的结构。NCBNT的优化合成条件:以二氧六环和水(体积比1.5∶1.0)为溶剂、采用的碱为NaOH、n(N-正丁基-4-(2’-氨基)乙基氨基-1,8-萘酰亚胺)∶n(2-氯-4,6-二(2-萘氧基)-1,3,5-三嗪)=1.2∶1.0,室温下搅拌30 min,再升温至80℃反应48 h。NCBNT在N,N-二甲基甲酰胺(DMF)中的最大吸收波长为435 nm,摩尔吸光系数为1.34×104 L/(mol.cm),最大发射波长为521 nm,荧光量子产率为0.342。研究了NCBNT与曙红Y之间的能量转移以及萘荧光团在能量转移中的作用。实验结果表明,当浓度均为2.5×10-5 mol/L的NCBNT和曙红Y共存于DMF溶液中时,NCBNT可将吸收能量的86.8%转移给曙红Y,使曙红Y的荧光强度增强10.1倍,这一荧光增强效果部分来自萘荧光团的贡献。更多还原

【Abstract】 A novel fluorescent molecule(NCBNT) with two naphthalene fluorophores and one 1,8-naphthalimide fluorophore was synthesized through controlled nucleophilic substitution reaction of cyanuric chloride.The synthesized NCBNT was characterized by means of FTIR,1H NMR,MS and elementary analysis.The optimal conditions for NCBNT synthesis were obtained: dioxane and water as solvent(volume ratio 1.5:1.0),NaOH as alkali,n(N-butyl-4[(2′-aminoethyl)amino]-1,8-naphthalimide):n(2-chloro-4,6-bis-(naphthalene-2-yloxy)-triazine) 1.2:1.0,room temperature for 30 min and then 80 ℃ for 48 h.The maximum UV-Vis absorption wavelength and fluorescence emission wavelength of NCBNT in N,N-dimethylformamide(DMF) were 435 nm(molar extinction coefficient 1.34×104 L/(mol·cm)) and 521 nm(fluorescence quantum yield 0.351).The energy transfer between NCBNT and eosin Y,and the effect of naphthalene fluorophores on energy transfer were investigated.When NCBNT and eosin Y coexisted in DMF with the same concentration of 2.5×10-5 mol/L,NCBNT could transfer 86.8% of the absorbed energy to eosin Y and enhance the fluorescence intensity of eosin Y by 10.1-fold,which was partially due to contribution of the naphthalene fluorophores.更多还原