CN107325109A - 基于罗丹明‑香豆素衍生物荧光探针及其制备方法和应用 - Google Patents

基于罗丹明‑香豆素衍生物荧光探针及其制备方法和应用 Download PDF

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CN107325109A
CN107325109A CN201710613209.9A CN201710613209A CN107325109A CN 107325109 A CN107325109 A CN 107325109A CN 201710613209 A CN201710613209 A CN 201710613209A CN 107325109 A CN107325109 A CN 107325109A
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王元
吴伟娜
李慧军
吴浩
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Henan University of Technology
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Abstract

本发明提供了一种基于罗丹明‑香豆素衍生物荧光探针及其制备方法和应用,其中所述罗丹明‑香豆素衍生物的化学结构式如下:本发明的罗丹明‑香豆素衍生物能选择性的与二价铜离子作用,由弱荧光变为黄色荧光,具有比色荧光增强效应,可实现裸眼辨别检测,特别是作为荧光探针在细胞内铜离子的方便检测的应用。

Description

基于罗丹明-香豆素衍生物荧光探针及其制备方法和应用
技术领域
本发明属于有机合成领域,具体涉及基于罗丹明-香豆素衍生物的荧光探针 及其制备方法和应用。
背景技术
铜是人体重要的微量元素,在线粒体的呼吸、铁的吸收、酶的氧化还原等 不同的生理过程中起着十分重要的作用。但若体内的铜离子代谢平衡遭到破坏, 有可能引起代谢紊乱和诸多疾病,如胆固醇升高,动脉弹性降低,血压升高。 此外,由于铜离子大量地开采和广泛地使用,使得铜也成为一个重要的金属污 染物。鉴于其对生命和环境的重要性,科学家们一直致力于采用选择性比色和 荧光传感探针实现对铜离子在生物和环境系统中检测的研究。
近年来,分子探针技术由于具有灵敏度高、操作简单、成本低等特点,已 经成为检测金属离子污染的重要手段。罗丹明-香豆素衍生物具有较大的摩尔消 光系数,荧光发射波长长,量子产率高等特点,在重金属离子识别的领域得到 越来越广泛的重视。
发明内容
基于金属铜离子能够使罗丹明酰腙衍生物内酰胺螺环开环,故罗丹明-香豆 素衍生物具有较好的二价铜离子识别性能。本发明主要目的在于提供一种可检 测二价铜离子的灵敏度高、选择性好的金属离子荧光探针;另一目的是提供该 探针的制备方法和应用。
本发明的技术方案是,一种基于罗丹明-香豆素衍生物荧光探针,所述罗丹 明-香豆素衍生物具有如下结构式:
本发明还提供了一种罗丹明-香豆素衍生物荧光探针的制备方法,具体制备 方法如下:
S1:将7-羟基-3-乙酰乙酰基香豆素首先用乙腈溶解,再加入罗丹明6G酰 肼,得到混合物;
S2:将S1所得混合物在常压下回流,反应时间2-4h,得到溶液;
S3:将S2所得溶液冷却至室温后,有固体析出,减压过滤,取滤渣;
S4:将S3所得滤渣用乙腈重结晶,得到基于所述罗丹明-香豆素衍生物的 荧光探针。
3、根据权利要求2所述的基于罗丹明-香豆素衍生物的荧光探针的制备方 法,S1中,所述7-羟基-3-乙酰乙酰基香豆素和所述罗丹明6G酰肼摩尔比为1: 1。
优选地,将0.001-0.01mol的7-羟基-3-乙酰乙酰基香豆素溶于0.01-0.05L 乙腈中,再加入罗丹明6G酰肼,常压下回流搅拌2-4h,冷却至室温后析出大 量固体,减压过滤得滤渣。将滤渣用乙腈重结晶得到所述罗丹明-香豆素衍生物 的荧光探针。
本发明还提供了上述罗丹明-香豆素衍生物的荧光探针一种用途,即在作为 二价铜离子荧光探针方面的应用。
本发明还提供了一种用于检测水样中二价铜离子的荧光探针,所述荧光探 针主要由上述罗丹明-香豆素衍生物组成。
本发明通过用香豆素修饰改性罗丹明衍生物制备罗丹明-香豆素衍生物荧 光探针,合成简单,原料易得,在多种常见金属离子中,对二价铜离子表现出 较高的选择性和识别性能,使含有二价铜离子的溶液由弱荧光变为黄色荧光, 具有比色荧光增强效应,可实现裸眼辨别检测,更为重要的是也可用于细胞内 铜离子的检测,具有快速、简便、灵敏度高、选择性强的特点,以及广泛的潜 在应用价值。
附图说明
图1为本发明实施例1制得的基于罗丹明-香豆素衍生物荧光探针的晶体结 构图;
图2为本发明实施例1制得的基于罗丹明-香豆素衍生物荧光探针的核磁共 振氢谱谱图;
图3为本发明实施例1制得的基于罗丹明-香豆素衍生物荧光探针的质谱谱 图;
图4为本发明实施例1制得的基于罗丹明-香豆素衍生物荧光探针的乙腈/ 水(体积比9:1)溶液(5×10-6mol/L)对2当量不同金属离子(Ag+,Al3+,Ca2+,Cd2+, Co2+,Cr3+,Cu2+,Fe3+,Hg2+,K+,Mg2+,Mn2+,Na+,Ni2+,Pb2+,Zn2+,2.5×10-5 mol/L)的荧光发射光谱图,激发波长为350nm;
图5为本发明实施例1制得的基于荧光探针的乙腈/水(体积比9:1)溶液 (5×10- 6mol/L)滴定不同浓度Cu2+的荧光光谱光图;
图6在U251细胞中,荧光探针与Cu2+的荧光成像图;U251细胞用5×10-6 mol/L荧光探针培育30分钟后加入5×10-6mol/L Cu2+,继续培育30分钟后 使用Olympus FV500-IX70激光共聚焦显微镜进行荧光成像。
其中:a为荧光探针荧光成像图;b为荧光探针明场成像图;c为荧光探针 明场图和荧光图叠加后的图片;d为荧光探针+Cu2+明场下的成像图;e为荧光 探针+Cu2+荧光成像图;f为荧光探针+Cu2+明场图和荧光图叠加后的图片。
具体实施方式
下面结合附图和具体实施例进一步详细说明本发明,本发明实施例采用的 试剂和原料为常规市场购买或参考文献合成得到。
实施例1:
罗丹明-香豆素衍生物的合成
将0.246g 7-羟基-3-乙酰乙酰基香豆素溶于10mL乙腈中,再加入0.428g 罗丹明6G酰肼,常压下回流搅拌3h,冷却至室温后析出大量固体,减压过滤, 将滤渣用乙腈重结晶得到黄色固体即为目标产物,目标产物的产率为58.2%。
罗丹明-香豆素衍生物核磁共振分析结果如下:
单晶结构:罗丹明-香豆素衍生物晶体结构图见图1;
核磁共振氢谱:1H NMR(400MHz,DMSO-d6),δ(ppm):11.67(s,1H,OH), 10.89(s,1H,NH),8.41(s,1H,Aryl-H),7.88-7.90(d,1H,Aryl-H),7.56-7.68(m,3H, Aryl-H),7.09-7.11(d,1H,Aryl-H),6.75-6.78(dd,1H,Aryl-H),6.67-6.68(d,1H, Aryl-H),6.19-6.22(d,4H,Aryl-H),6.10(s,1H,CH),5.13-5.16(t,2H,2NH-CH2), 3.06-3.13(m,4H,2CH2),1.88(s,6H,2CH3),1.61(s,3H,CH3),1.16-1.19(t,3H, 2CH3).具体核磁共振氢谱图见图2。
质谱:ESI-MS:m/z=656.79forM+.具体质谱谱图见图3。
实施例2
罗丹明-香豆素衍生物对二价铜离子的光学性质测定
将上述实施例1制得的罗丹明-香豆素衍生物作为探针在乙腈/水(体积比9: 1)介质中配制成摩尔浓度为5×10-6mol/L的溶液,分别在含摩尔浓度为1×10-5 mol/L的Ag+,Al3 +,Ca2+,Cd2+,Co2+,Cr3+,Cu2+,Fe3+,Hg2+,K+,Mg2+,Mn2+, Na+,Ni2+,Pb2+,Zn2+等金属离子的溶液中加入等量的上述探针溶液,采用荧 光光谱仪对实施例1制得的罗丹明-香豆素衍生物进行荧光发射光谱分析,激发 波长为350nm,所得的荧光发射光谱图见图4。本发明实施例1制得的罗丹明- 香豆素衍生物与二价铜离子作用在555nm处的发射峰明显上升,同时产生肉眼 明显可见无荧光到黄色荧光的变化,可用于二价铜离子的快速检测。而本发明 制得的罗丹明-香豆素衍生物对其它金属离子如Ag+,Al3+,Ca2+,Cd2+,Co2+, Cr3+,Fe3+,Hg2+,K+,Mg2+,Mn2+,Na+,Ni2+,Pb2+,Zn2+等无明显荧光响应。
实施例3
浓度为5×10-6mol/L的罗丹明-香豆素衍生物作为荧光探针的乙腈/水(体 积比9:1)溶液中分别加入浓度为0mol/L,5×10-7mol/L,1×10-6mol/L, 1.5×10-6mol/L,2×10- 6mol/L,2.5×10-6mol/L,3×10-6mol/L,3.5×10-6mol /L,4×10-6mol/L,4.5×10-6mol/L,5×10-6mol/L和1×10-5mol/L的二价 铜离子,采用荧光光谱仪对其分别进行荧光发射光谱分析,记录555nm处的发 射强度值,所得的发射光谱图见图5。通过附图5可以看出,随着铜离子浓度 增加,罗丹明-香豆素衍生物荧光探针在555nm处的荧光强度逐渐增强,且吸 收峰强度与铜离子浓度在0-5×10-6mol/L范围内线性相关,检测限为4.45×10-8 mol/L。
实施例4
罗丹明-香豆素衍生物荧光探针在细胞内铜离子的检测实验
U251细胞用5×10-6M的上述实施例1制得的罗丹明-香豆素衍生物荧光探 针培育0.5小时后加入Cu2+,继续培育0.5小时后使用Olympus FV500-IX70激 光共聚焦显微镜进行荧光成像,获得在U251细胞的荧光成像图,具体如图6 所示,其中a为上述荧光探针明场下的成像图;b为上述荧光探针荧光成像图;c为上述荧光探针明场图和荧光图叠加后的图片;d为上述荧光探针+Cu2+明场 下的成像图;e为上述荧光探针+Cu2+荧光成像图;f为上述荧光探针+Al3+明场 图和荧光图叠加后的图片。U251细胞中加入上述罗丹明-香豆素衍生物无荧光, 而再加入铜离子后,荧光强度明显增加,故本发明实施例1制得的罗丹明-香豆 素衍生物可用于细胞中铜离子的荧光探针。
以上所述实施例仅是为充分说明本发明而所举的较佳的实施例,其保护范 围不限于此。本技术领域的技术人员在本发明基础上所作的等同替代或变换, 均在本发明的保护范围之内,本发明的保护范围以权利要求书为准。

Claims (6)

1.一种基于罗丹明-香豆素衍生物荧光探针,其特征在于,所述罗丹明-香豆素衍生物具有如下结构式:
2.根据权利要求1所述的基于罗丹明-香豆素衍生物荧光探针的制备方法,其特征在于,包括如下步骤:
S1:将7-羟基-3-乙酰乙酰基香豆素首先用乙腈溶解,再加入罗丹明6G酰肼,得到混合物;
S2:将S1所得混合物在常压下回流,反应时间2-4h,得到溶液;
S3:将S2所得溶液冷却至室温后,有固体析出,减压过滤,取滤渣;
S4:将S3所得滤渣用乙腈重结晶,得到基于所述罗丹明-香豆素衍生物的荧光探针。
3.根据权利要求2所述的基于罗丹明-香豆素衍生物的荧光探针的制备方法,其特征在于,S1中,所述7-羟基-3-乙酰乙酰基香豆素和所述罗丹明6G酰肼摩尔比为1:1。
4.根据权利要求2所述的基于罗丹明-香豆素衍生物的荧光探针的制备方法,其特征在于,将0.001-0.01mol的7-羟基-3-乙酰乙酰基香豆素溶于0.01-0.05L乙腈中,再加入0.001-0.01mol的罗丹明6G酰肼,常压下回流搅拌2-4h,冷却至室温后析出固体,减压过滤得滤渣。将滤渣用乙腈重结晶得到所述罗丹明-香豆素衍生物的荧光探针。
5.罗丹明-香豆素衍生物在作为铜离子荧光探针方面的应用。
6.罗丹明-香豆素衍生物在作为检测细胞内铜离子的荧光探针中的应用。
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CN108424419A (zh) * 2018-03-31 2018-08-21 浙江工业大学 一种链双1,2,3-三唑罗丹明6g类荧光探针及其制备与应用
CN110818702A (zh) * 2019-11-22 2020-02-21 河南理工大学 一种吡啶-香豆素衍生物荧光探针及其制备方法和应用
CN112898257A (zh) * 2021-03-12 2021-06-04 天津理工大学 一种水溶性香豆素衍生物内盐的合成方法

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