CN105505379B - 一种长波长bodipy类荧光染料衍生物及其制备方法 - Google Patents
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Abstract
本发明涉及一种长波长BODIPY类荧光染料衍生物及其制备方法,采用醛基三聚茚衍生物,与BODIPY衍生物在对甲苯磺酸和哌啶催化作用下发生Knoevenagel缩合反应合成。该制备方法反应步骤简单、反应条件温和。该类荧光染料具有高的摩尔消光系数、较好的溶解性和光稳定性等优异的光物理性能,其紫外吸收红移到580nm以上,荧光发射波长超过600nm,是非常有前景的有机荧光染料。在细胞成像、生物标记或者场效应晶体管等领域应具有良好的潜在应用前景。
Description
技术领域
本发明属于有机化合物合成技术领域,具体涉及一种长波长近红外BODIPY类荧光分子及其制备方法。
背景技术
氟化硼络和二吡咯甲川荧光染料(BODIPY)是一类性质优良的荧光染料,它是由二吡咯亚甲基与三氟化硼形成的复合物。该类染料具有光稳定性好、半峰宽窄、量子产率高、摩尔消光系数大且母体结构易修饰等特点而被科学界广泛的研究。
近年来,对BODIPY染料的研究倾向于合成长波长的BODIPY染料,因为染料的吸收和发射波长较长、光穿透力强、背景干扰小,可以很好地应用于生物分析和生物成像。为了使BODIPY的电子吸收及荧光发射波长发生显著红移,通常最简易方法就是在BODIPY的3、5引入共轭的芳环基团。
三聚茚(truxene)是一个三重对称性平面刚性的稠环芳烃,具有大的刚性共轭结构和较高的光、热稳定性,且是一类结构易修饰的有机光电材料。噻吩是优良的共轭连接基团,噻吩基团的引入可以增大三聚茚分子共轭体系,使其电子吸收向长波方向移动。相比结构类似的含有苯环的分子,含噻吩环的分子的最大吸收波长更大,更容易得到吸收,是生物医学光谱窗口区域的新材料。此外,噻吩也是优良的给电子单元,被广泛的应用在有机光电等领域。另外,带有重原子(例如:溴原子)的BODIPY染料分子在细胞内受光激发时更有利于单线态氧的产生,这对于光动力疾病治疗领域的研究具有重要的意义。因此,在本发明中,通过Suzuki、Sonogashira以及溴代反应,在三聚茚上引入噻吩基团和溴原子,并使用Knoevenagel缩合反应将带有不同取代基的三聚茚基团稼接到BDOIPY上,设计并合成了结构新颖、性能优良、制备方法简单的长波长BODIPY类荧光染料。
发明内容
发明目的:针对现有技术中存在的不足,本发明的目的是提供一种长波长BODIPY类荧光染料衍生物。本发明的另一目的是提供一种上述的长波长BODIPY类荧光染料衍生物的制备方法。
技术方案:为了实现上述发明目的,本发明采用的技术方案为:
本发明的一种长波长BODIPY类荧光染料衍生物及其制备方法,其特征在于,其结构通式如下:
式中,
一种长波长BODIPY荧光染料衍生物的制备方法,步骤如下:
1)在配备有Dean-Stark装置的圆底烧瓶中加入BODIPY衍生物、醛基三聚茚衍生物和对甲苯磺酸,然后溶于25mL甲苯和2mL哌啶,混合物加热到140℃回流,TCL检测原料反应完全。其中,三聚茚甲醛、对甲苯磺酸和BODIPY衍生物的摩尔比为1∶1∶1。
2)将反应物冷至室温,减压蒸馏除去有机溶剂,残留物经硅胶柱层析分离,洗脱离剂为二氯甲烷-石油醚,得到红色固体产物。
具体化学反应式如下:
上述步骤(1)中,三聚茚甲醛衍生物、对甲苯磺酸与BODIPY衍生物的摩尔比为1∶1∶1。
上述步骤(1)中,加入的甲苯和哌啶的用量分别是25mL和2mL。
上述步骤(1)中,催化剂为对甲苯磺酸和哌啶。
上述步骤(2)中,柱层析分离洗脱剂为石油醚∶二氯甲烷=4∶1~1∶1。
本发明的有益效果
与现有技术相比,本发明的一种长波长BODIPY类荧光染料衍生物及其制备方法具有的优点有:(1)制备方法简便易行,不需要多步反应就可以得到长波长的BODIPY类衍生物,对氧气和湿度不敏感,可以保证产物依然具有BODIPY类化合物固有的可加工性和环境稳定性。(2)该类化合物在有机溶剂溶解性好。(3)该荧光染料的紫外可见吸收光谱和荧光发射光谱窄、光稳定性好,在细胞成像、激光染料、有机光伏电池材料等领域具有良好的潜在应用前景。
附图说明
图1是化合物a的紫外-可见吸收光谱图;
图2是化合物a的荧光发射光谱图;
图3是化合物b的紫外-可见吸收光谱图;
图4是化合物b的荧光发射光谱图。
图5是化合物c的紫外-可见吸收光谱图;
图6是化合物c的荧光发射光谱图。
具体实施方式
下面结合具体附图对本发明做进一步的说明。
用1H-NMR、UV-Vis谱及ESI MASS表征并证实近红外BODIPY类荧光染料的结构。检测所用仪器为:BrukerARX600型核磁共振仪(TMS为内标,氘代氯仿为溶剂),岛津UV-3100型紫外-可见分光光度计(扫描范围300~900nm,光路狭缝2nm),荧光光谱用美国AmicoBowman Series 2Luminescence Spectrometer测试。
实施例1
圆底烧瓶中配备有分水器,将1,3,5,7-四甲基-8-(2,4,6-三甲苯)-BODIPY(109.8mg,0.30mmol),2-醛基-6,10-二噻吩三聚茚(0.211g,0.30mmol)和对甲苯磺酸(50mg)溶于25mL甲苯和2mL哌啶,混合物加热到140℃回流,TLC跟踪检测原料反应完全,收集溶剂直到蒸干。将反应物浓缩,硅胶柱层析,洗脱剂为(石油醚/CH2Cl2=1∶1),得到红色固体a(46.0mg,14.45%)。1H NMR:(600MHz,CDCl3)δ8.37(t,J=8.40Hz,3H),7.81(d,J=16.20Hz,1H),7.74(d,J=7.80Hz,1H),7.70(d,J=7.20Hz,4H),7.60(s,1H),7.46(d,J=3.60Hz,2H),7.39(d,J=16.20Hz,1H),7.33(d,J=4.80Hz,2H),7.15(t,J=4.20Hz,2H),6.98(s,2H),6.67(s,1H),6.02(s,1H),3.06-3.01(m,6H),2.66(s,3H),2.36(s,3H),2.26-2.22(m,6H),2.15(s,6H),1.48(s,3H),1.43(s,3H),0.30-0.25(m,18H);UV-vis:340nm,541nm,583nm(图1);Emission Wavelength:604nm(图2)。
实施例2
圆底烧瓶中配备有分水器,将1,3,5,7-四甲基-2,6-二碘-8(2,4,6-三甲苯)-BODIPY(109.8mg,0.30mmol),2-醛基-6,10-二噻吩乙炔基三聚茚(0.225g,0.30mmol)和对甲苯磺酸(50mg)溶于25mL甲苯和2mL哌啶,混合物加热到140℃回流,TLC跟踪检测原料反应完全,收集溶剂直到蒸干。将反应物浓缩,硅胶柱层析,洗脱剂为(石油醚/CH2Cl2=4∶1),得到红色固体b(15.1mg,4.58%)。1H NMR:(400MHz,CDCl3)δ8.38-8.31(m,3H),7.80(d,J=16.80Hz,1H),7.71(d,J=8.40Hz,1H),7.625(dd,J=1.20,4.80Hz,2H),7.60-7.55(m,3H),7.39(s,1H),7.35-7.33(m,3H),7.32(s,1H),7.06-7.04(m,2H),6.98(s,2H),6.66(s,1H),6.02(s,1H),3.04-2.97(m,6H),2.65(s,3H),2.36(s,3H),2.26-2.15(m,6H),2.14(s,6H),1.47(s,3H),1.43(s,3H),0.24(t,J=7.20Hz,18H);UV-vis:342nm,362nm,542nm,582nm(图3);Emission Wavelength:602nm(图4)。
实施例3
圆底烧瓶中配备有分水器,将1,3,5,7-四甲基-2,6-二碘-8(2,4,6-三甲苯)-BODIPY(109.8mg,0.30mmol),2-醛基-7,12-二溴三聚茚(0.209g,0.30mmol)和对甲苯磺酸(50mg)溶于25mL甲苯和2mL哌啶,混合物加热到140℃回流,TLC跟踪检测原料反应完全,收集溶剂直到蒸干。将反应物浓缩,硅胶柱层析,洗脱剂为(石油醚/CH2Cl2=1∶1),得到红色固体c(33.0mg,10.53%)。1H NMR:(600MHz,CDCl3)δ8.32(d,J=8.40Hz,1H),8.22(d,J=8.40Hz,1H),8.17(d,J=8.40Hz,1H),7.79(d,J=16.80Hz,1H),7.70(d,J=7.80Hz,1H),7.60-7.57(m,3H),7.54-7.51(m,2H),7.36(d,J=16.20Hz,1H),6.98(s,2H),6.66(s,1H),6.02(s,1H),3.02-2.88(m,6H),2.65(s,3H),2.36(s,3H),2.24-2.10(m,12H),1.47(s,3H),1.43(s,3H),0.25-0.21(m,18H);UV-vis:313nm,369nm,542nm,581nm(图5);EmissionWavelength:601nm(图6)。
Claims (2)
1.一种长波长BODIPY类荧光染料衍生物,其特征在于,其结构通式如下:
式中,
2.权利要求1所述长波长BODIPY荧光染料衍生物的制备方法,其特征在于:以醛基三聚茚衍生物和BODIPY衍生物为原料,在对甲苯磺酸和哌啶的催化作用下生成目标物,步骤如下:
1)在无水条件下,在配备有Dean-Stark装置的圆底烧瓶中加入BODIPY、醛基三聚茚衍生物和新重结晶对甲苯磺酸,然后溶于甲苯,并加入少量哌啶,混合物加热到140℃回流,TLC检测反应原料点消失;其中,醛基三聚茚衍生物、对甲苯磺酸和BODIPY衍生物的摩尔比为1:1:1;
2)将反应物冷至室温,减压蒸馏除去有机溶剂,残留物经硅胶柱层析分离提纯,洗脱剂为石油醚:二氯甲烷=4:1~1:1,得到红色固体产物。
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