CN106146526A - 一种荧光探针化合物及其制备方法和用途 - Google Patents
一种荧光探针化合物及其制备方法和用途 Download PDFInfo
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Abstract
本发明涉及一种荧光探针化合物及其制备方法和用途,所述荧光探针为罗丹明酰肼衍生物,其结构式如下:先合成罗丹明水合肼,再合成探针分子;本发明探针分子原料易得,合成路线简单,后处理简单方便。探针在乙醇和水的混合溶液中溶解性较好,最大发射波长在581nm处,荧光信号较弱,随着三价铁离子的加入,探针分子在波长581nm处出现较强的发射峰。因此可以用于检测水溶液中的三价铁离子,此外这种探针能有效的检测活细胞中的三价铁离子,可应用于生物医药领域当中。
Description
技术领域
本发明涉及一种荧光探针化合物及其制备方法和用途,尤其涉及一种检测三价铁离子的荧光探针化合物及其制备与应用,属于荧光探针技术领域。
背景技术
近年来,随着化学传感器的迅速发展,荧光探针因其具有灵敏度高,选择性好,实时响应等优点,尤其是通过借助荧光共聚焦显微成像技术可实时检测活细胞内分子或离子浓度以及生物大分子结构的变化过程,在化学,生物,医学,环境等诸多领域受到了人们越来越多的关注,成为一大研究热点。
铁在许多生理过程中起着重要的作用。铁不仅是所有组织中血红蛋白里氧的携带者,而且它还帮助细胞色素和铁氧化还原转移电子。另外,铁还是固氮酶的重要组成部分。但是,过高含量的铁将会导致严重的问题,比如引发癌症和某些器官如心脏、胰腺和肝脏的老化。最近的研究表明,铁与一些神经性疾病如帕金森综合症和老年痴呆症也有关系。因此,找到一种在生物体内方便、快速检测铁离子的方法已经引起了生物科学和环境科学的关注。常见的定性定量检测三价铁离子的方法有:比色法,循环伏安法,原子吸收等等。但这些技术需要繁琐的样品预制备过程,复杂的仪器设备,积极对细胞造成伤害等缺点。由于金属离子荧光探针的高灵敏度,高选择性,低检测限等优势,金属离子荧光探针的设计与合成有很大的发展。
发明内容
本发明的目的是为了改进现有技术的不足而提供一种检荧光探针化合物,本发明的另一目的是提供上述化合物的制备方法,本发明还有一目的是提供上述检荧光探针化合物的应用,该探针不仅可以检测铁离子,而且制备方法简单,适合放大和实际应用。
本发明的技术方案为:一种荧光探针化合物,其特征在于:所述荧光探针为罗丹明酰肼衍生物,其结构式如下:
本发明还提供了制备上述的荧光探针化合物的方法,其具体步骤如下:
(1)罗丹明水合肼的合成:在容器中滴加乙醇,向其中加入罗丹明B搅拌使其溶解;然后将溶于乙醇中的水合肼滴加到溶于乙醇的罗丹明B中回流反应1~4小时,得到橘黄色溶液,旋转蒸发得到粘稠固体,然后将酸滴加到其中,直到固体全部溶解,再向其中滴加碱直到pH达到8~10,出现粉色絮状物,抽滤,得到粉色固体罗丹明水合肼;
(2)探针分子的合成:将步骤(1)中得到的罗丹明水合肼溶于冰醋酸中,再向其中加入顺丁烯二酸酐,回流反应4~8小时,旋转蒸发,柱层析分离得到黄色固体罗丹明酰肼衍生物,即荧光探针化合物。
优选步骤(1)中所述的罗丹明B与水合肼的摩尔比为1:(1~3)。
优选步骤(1)中所述酸为盐酸、硝酸或硫酸。
优选步骤(1)中所述的碱为氢氧化钠或氢氧化钾。
优选步骤(2)中所述罗丹明水合肼与顺丁烯二酸酐的摩尔比为1:(1~3)。
本发明还提供了上述的荧光探针化合物在识别三价铁离子中的应用。所述探针的乙醇-水混合溶液可以通过荧光光谱法和颜色变化实现对三价铁离子的识别。
本发明的荧光光谱测定:
将荧光探针分子配成浓度为10μm/L的乙醇水溶液,荧光光谱在荧光分光光度计上测量,激发波长455nm,每次移取3mL的探针乙醇水溶液于石英比色皿中,用微量注射器分别加入不同体积的浓度为10mmol/L的各种金属离子(Na+,K+,Ag+,Mg2+,Cu2+,Cd2+,Pb2+,Zn2+,Mn2 +,Co2+,Ni2+,Fe3+,Al3+)水溶液,用荧光光谱研究荧光探针与不同金属离子相互作用的光谱性质。
有益效果:
探针分子原料易得,合成路线简单,反应条件吻合,后处理简单方便,可以检测三价铁离子。探针在乙醇和水的混合溶液中溶解性较好,最大发射波长在581nm处,荧光信号较弱,随着三价铁离子的加入,探针分子在波长581nm处出现较强的发射峰。因此可以用于检测水溶液中的三价铁离子,此外这种探针能有效的检测活细胞中的三价铁离子,可应用于生物医药领域当中。
附图说明
图1为实施例1制得的荧光探针的1HNMR谱图;
图2为实施例1制得的荧光探针的13CNMR谱图;
图3为实施例1制得的荧光探针的ESI-MS谱图;
图4为实施例3荧光探针加入不同金属离子后的荧光变化图;
图5为实施例3荧光探针加入三价铁离子前后在自然光下颜色变化图;
图6为实施例3荧光探针加入三价铁离子前后在荧光灯下颜色变化图;
图7为实施例4荧光探针与不同浓度的三价铁离子作用后的荧光光谱图,横坐标为波长,纵坐标为荧光强度,荧光探针的浓度为10μm/L,三价铁离子浓度分别为0,1,2,3,4,5,6,7,8,9,10,20,30,40,50μm/L;
图8为实施例4荧光探针的荧光强度与三价铁离子浓度的线性关系图,横坐标为三价铁离子的浓度,纵坐标为荧光强度;
图9为实施例5荧光探针加入不同金属离子后的柱形图,横坐标为金属种类,纵坐标为荧光强度;
图10为实施例6Hela细胞的荧光共聚焦成像结果;其中A为细胞图,B为加入探针培养10分钟后的细胞成像,C为加入三价铁离子培养10分钟后的细胞成像。
具体实施方式
下面的实施例将对本发明予以进一步的说明,但不因此而限制本发明。
实施例1:检测铁离子的荧光探针的制备,基本合成过程如下:
(1)罗丹明水合肼的合成:25mL单口瓶中滴加2mL乙醇,向其中加入1mmol罗丹明B搅拌使其溶解;然后将溶于2mL乙醇中的1mmol水合肼滴加到罗丹明B中回流反应1小时,得到橘黄色溶液,旋转蒸发得到粘稠固体,然后将盐酸溶液滴加到其中直到固体全部溶解,再向其中滴加氢氧化钠溶液直到PH达到8,出现粉色絮状物,抽滤,得到粉色固体:产率90%。
(2)探针分子的合成:将步骤(1)中得到的0.9mmol罗丹明水合肼溶于10mL冰醋酸中,再向其中加入0.9mmol顺丁烯二酸酐,回流反应4小时,旋转蒸发,然后柱层析分离得到黄色固体罗丹明酰肼衍生物,洗脱剂为石油醚:乙酸乙酯=3:1;产率66%。所得探针分子的氢谱如图1,氢谱数据如下:1HNMR(400MHz,C3D6O)δ7.97(m,1H),7.69(dtd,J=28.6,7.5,1.1Hz,2H),7.22(d,J=7.6Hz,1H),6.86(s,2H),6.65(d,J=8.9Hz,2H),6.40(dd,J=8.9,2.6Hz,2H),6.29(d,J=2.6Hz,2H),3.39(q,J=7.0Hz,8H),1.15(t,J=7.0Hz,12H).碳谱如图2,碳谱数据如下:13CNMR(100MHz,C3D6O)δ(ppm)167.27,164.63,154.78,149.96,141.00,134.65,134.60,131.89,129.93,127.85,125.86,123.84,108.78,105.40,97.71,76.66,44.70,12.86.质谱如图3,质谱数据如下:ESI-MS:calcd for C32H32N4O4[M+H+]+:537.2424;found:537.2499.
实施例2:检测铁离子和硫醇的荧光探针的制备,基本合成过程如下:
1)罗丹明水合肼的合成:150mL单口瓶中滴加35mL乙醇,向其中加入10mmol罗丹明B搅拌使其溶解;然后将溶于20mL乙醇中的30mmolL水合肼滴加到罗丹明中回流反应4小时,得到橘黄色溶液,旋转蒸发得到粘稠固体,将硫酸滴加到其中直到固体全部溶解,然后缓慢滴加氢氧化钾溶液直到PH达到10,出现粉色絮状物,抽滤,得到粉色固体:产率90%。
2)探针分子的合成:将步骤(1)中得到的5mmol罗丹明水合肼溶于35mL冰醋酸中,再向其中加入15mmol顺丁烯二酸酐,回流反应7小时,旋转蒸发,柱层析分离得到黄色固体罗丹明酰肼衍生物,洗脱剂为石油醚:二氯甲烷=1:1;产率68%。所得探针分子的氢谱数据如下:1HNMR(400MHz,C3D6O)δ7.97(m,1H),7.69(dtd,J=28.6,7.5,1.1Hz,2H),7.22(d,J=7.6Hz,1H),6.86(s,2H),6.65(d,J=8.9Hz,2H),6.40(dd,J=8.9,2.6Hz,2H),6.29(d,J=2.6Hz,2H),3.39(q,J=7.0Hz,8H),1.15(t,J=7.0Hz,12H).碳谱数据如下:13CNMR(100MHz,C3D6O)δ(ppm)167.27,164.63,154.78,149.96,141.00,134.65,134.60,131.89,129.93,127.85,125.86,123.84,108.78,105.40,97.71,76.66,44.70,12.86.质谱数据如下:ESI-MS:calcd for C32H32N4O4[M+H+]+:537.2424;found:537.2499.
实施例3:探针分子的荧光光谱测定
取实例1中3mL浓度为10μmol/L的探针乙醇水混合溶液于石英比色皿中,然后分别加入3μL浓度为10mmol/L的各种金属离子(Na+,K+,Ag+,Mg2+,Cu2+,Cd2+,Pb2+,Zn2+,Mn2+,Co2+,Ni2+,Fe3+,Al3+)溶液,摇匀,在激发波长455nm下测定其荧光发射光谱(如图4),结果显示,没有加入金属离子时,没有发射峰,加入三价铁离子时,在581nm处出现发射峰,加入其它金属离子时,没有出现发射峰,加入三价铁离子前后在自然光下颜色变化如图5所示,颜色由无色变为紫红色;在荧光灯下颜色变化如图6所示,颜色由无色变为粉红色荧光。
实例4:探针分子对铁离子测定的响应情况
取实例1中3mL浓度为10μmol/L的探针乙醇水混合溶液于石英比色皿中,,向其中加入不同浓度三价铁离子,随三价铁离子浓度依次增加,其荧光光谱发生明显红移增强的变化,如图7所示,表明探针与铁离子结合以后发生了变化。通过离子浓度与荧光强度的关系曲线可知,在0.1~1μmol/L的范围内,三价铁离子浓度与荧光强度呈现良好的线性关系(R2=.98704),其线性方程为:y=489.5369x+139.9685.如图8所示。
实例5:探针分子对三价铁离子的选择性和抗干扰性
取实例2中3mL浓度为10μmol/L的探针水溶液于石英比色皿中,加入3μL浓度为10mmol/L的三价铁离子后,再分别加入然后分别加入3μL浓度为10mmol/L的各种金属离子(Na+,K+,Ag+,Mg2+,Cu2+,Cd2+,Pb2+,Zn2+,Mn2+,Co2+,Ni2+,Fe3+,Al3+)溶液,摇匀,在激发波长455nm下测定其荧光发射光谱,.结果如图9所示,结果显示加入其它金属离子均对探针分子的荧光强度几乎没有影响,这表明该探针分子对三价铁离子识别具有较高的选择性和较好的抗干扰能力。
实施例6:荧光探针在细胞内检测三价铁离子
向已经培养好的Hela细胞中加入实施例2制备得到的10μmol的探针,培养10分钟,再加入10μmol的铁离子继续培养10分钟,用吸管吸掉培养基,用PBS缓冲液洗涤细胞3次,加入2mL PBS缓冲液进行成像实验,结果如图10所示,从图上可以看出,探针在细胞内荧光下可以显色。
Claims (7)
1.一种荧光探针化合物,其特征在于:所述荧光探针为罗丹明酰肼衍生物,其结构式如下:
2.一种制备如权利要求1所述的荧光探针化合物的方法,其具体步骤如下:
(1)罗丹明水合肼的合成:在容器中滴加乙醇,向其中加入罗丹明B搅拌使其溶解;然后将溶于乙醇中的水合肼滴加到溶于乙醇的罗丹明B中回流反应1~4小时,得到橘黄色溶液,旋转蒸发得到粘稠固体,然后将酸滴加到其中,直到固体全部溶解,再向其中滴加碱直到pH达到8~10,出现粉色絮状物,抽滤,得到粉色固体罗丹明水合肼;
(2)探针分子的合成:将步骤(1)中得到的罗丹明水合肼溶于冰醋酸中,再向其中加入顺丁烯二酸酐,回流反应4~8小时,旋转蒸发,柱层析分离得到黄色固体罗丹明酰肼衍生物,即荧光探针化合物。
3.如权利要求2所述的方法,其特征在于步骤(1)中所述的罗丹明B与水合肼的摩尔比为1:(1~3)。
4.如权利要求2所述的方法,其特征在于步骤(1)中所述酸为盐酸、硝酸或硫酸。
5.如权利要求2所述的方法,其特征在于步骤(1)中所述的碱为氢氧化钠或氢氧化钾。
6.如权利要求2所述的方法,其特征在于步骤(2)中所述罗丹明水合肼与顺丁烯二酸酐的摩尔比为1:(1~3)。
7.一种如权利要求1所述的荧光探针化合物在识别三价铁离子中的应用。
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