CN111592532A - 一种检测肼的近红外荧光探针及其制备和应用 - Google Patents
一种检测肼的近红外荧光探针及其制备和应用 Download PDFInfo
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Abstract
本发明公开了一种检测肼的近红外荧光探针及其制备和应用,本发明制备的近红外荧光探针合成简单,性质稳定,测定条件温和,能够长期稳定保存;选择性高,能够特异性识别溶液中的硫化物;抗干扰能力强,能够防止其他物质对该探针检测的干扰;灵敏度高,适合微量硫化物的检测;与肼反应快,有颜色变化,能够快速识别,提高检测时间;适用于商业推广使用。本发明对肼具有专一识别性,高灵敏度,抗干扰,具有良好的荧光发射特性,可用于水中肼的实时测定,易于推广。
Description
技术领域
本发明涉及一种检测肼的近红外荧光探针及其制备和应用,属于化学检测领域。
背景技术
肼又叫做联氨,是精细化工行业的重要试剂。由于其易燃和易爆的性质,被用于火箭推进剂;另外作为一种活性碱和还原剂,在被广泛应用于化工、医药、农业等行业。肼的广泛使用,同时也引发了污染问题。肼通过皮肤渗透或呼吸进入人体,造成皮炎、恶心、甚至昏迷等现象。因此,开发一种能高灵敏、专一识别肼的技术尤为重要。
目前已有几种常规检测方法,对二氨基苯甲醛分光光度法(GB/T 5750.8-2006),电化学发、色谱分析法等,这些方法有一些缺陷如:需要昂贵的仪器设备、复杂的操作过程、样品前处理繁琐等,而荧光成像分析法具有灵敏度高、选择性好、响应迅速、操作简单等优点,因此近年来得到广泛关注。荧光探针可以实现在细胞组织内实时检测分析物的优点,但是检测肼的荧光探针的报道数量有限,而且很多探针合成复杂,容易受到干扰离子影响。因此,发明新的兼具选择性和灵敏性的肼探针很有意义。
发明内容
本发明目的在于针对目前检测肼荧光探针现有技术中存在的问题,提供一种检测肼的近红外荧光探针,其合成简单、选择性好、灵敏度高、能够快速定量检测水中的肼。
本发明的技术方案:
一种检测肼的近红外荧光探针,结构通式如下:
一种所述检测肼的近红外荧光探针的制备方法,制备流程如下所示:
具体制备步骤如下:
1)化合物1与3-羟基苯硫酚于碳酸钾的乙腈溶液中加热反应,分离、提纯得化合物2:
2)化合物2、乙酰氯和三乙胺于二氯甲烷溶液中反应,分离、提纯得到深蓝色粉末,即检测肼的荧光探针3:
步骤(1)中,所述化合物1、3-羟基苯硫酚、碳酸钾的物质的量比为1:2:2;所述化合物1与溶剂乙腈的重量比为1:6-7;所述3-羟基苯硫酚和碳酸钾总重量与溶剂乙腈的重量比为1:14-15。
步骤(1)中,所述加热温度为60℃,反应时间为5h。
步骤(1)中分离提纯步骤为,将上述反应液进行抽滤,滤液经减压蒸馏浓缩得到粗产品。粗产品通过柱层层析硅胶进行分离、提纯,所用洗脱剂为体积比为100:1-5的二氯甲烷-甲醇混合液。
步骤(2)中,所述化合物2、乙酰氯、三乙胺的物质的量比为1:2:2。
步骤(2)中,所述反应时间为1h。
步骤(2)中,所述分离提纯步骤为将反应液于真空下减压浓缩后,用柱层析纯化;洗脱液为为100:1-5的二氯甲烷-甲醇混合液。
一种上述近红外荧光探针在检测肼的应用。该探针可以用于溶液体系中肼含量的定量检测。
上述应用中,激发波长为730nm,检测波长为805nm。
本发明的优点和有益效果:
本发明制备的近红外荧光探针3合成简单,性质稳定,测定条件温和,能够长期稳定保存;选择性高,能够特异性识别溶液中的硫化物;抗干扰能力强,能够防止其他物质对该探针检测的干扰;灵敏度高,适合微量硫化物的检测;与肼反应快,有颜色变化,能够快速识别,提高检测时间;适用于商业推广使用。
附图说明
图1是荧光探针3的结构;
图2是不同分析物对荧光探针3荧光强度的影响,插图为溶液变化;
图3是荧光探针3对不同浓度肼的荧光强度;
图4是肼试纸条变化。
具体实施方式
下面结合实施例和附图对本发明做进一步说明,但本发明不受下述实施例的限制。
实施例1、化合物2的制备路线如下:
具体制备步骤如下:
在室温搅拌、氩气保护下,将化合物1(699mg,1mmol)、碳酸钾(276mg,2mmol) 和3-羟基苯硫酚(252mg,2mmol)溶于乙腈(10mL)中,于60℃加热反应5小时,反应结束后冷却至室温得到反应液。再将反应液抽滤,滤液经减压蒸馏浓缩得到粗产品。粗产品用柱层层析硅胶进行分离、提纯,所用洗脱剂为体积比为100:1-5的二氯甲烷-甲醇混合液,得到目标产物2,固体,产率为68%。1H NMR(400MHz,DMSO-d6,ppm):δ=8.41(d,J=8.0Hz,1H),8.35(d,J=14.4Hz,1H),8.23(d,J=9.2Hz,1H),8.16(d,J=8.4Hz, 1H),7.98(d,J=8.8Hz,2H),7.75(t,J=7.6Hz,1H),7.64(t,J=7.4Hz,1H),7.54(d,J=8.4 Hz,1H),7.33(s,1H),7.05(d,J=2Hz,1H),6.92(d,J=8.6Hz,1H),6.75(d,J=14.8Hz,1H), 4.61-4.56(m,2H),2.72(t,J=5.4Hz,4H),2.00(s,6H),1.86(t,J=5.6Hz,3H),1.44(t,J=7.0 Hz,3H);13C NMR(100MHz,DMSO-d6,ppm):δ=178.42,160.03,159.98,151.67,143.93, 139.17,136.80,135.71,135.23,133.20,132.89,131.46,131.41,130.51,128.66,127.60,126.73,123.16,121.88,117.52,112.88,111.05,106.08,52.66,32.15,27.68,26.77,20.57,13.55。HRMS: (C31H30NOS+)m/z:计算值[M]+:464.2048.实测值[M]+:464.2053.
实施例2、探针3的制备路线如下:
其具体制备步骤如下:
称取化合物2(110mg,0.2mmol)溶于干燥二氯甲烷(5mL)中,冰水浴条件下滴加三乙胺(60μL,0.4mmol)、乙酰氯(56μL,0.4mmol),在氩气保护下,室温搅拌1h。反应液经减压蒸馏浓缩得到粗产物,粗产品用柱层层析硅胶进行分离、提纯,所用洗脱剂为体积比为100:1-5的二氯甲烷-甲醇混合液,得到目标产物3,为深蓝色固体,产率为 26%。1H NMR(400MHz,DMSO-d6,ppm):δ8.41-8.39(d,J=8.8Hz,1H),8.38-8.34(d,J= 15.2Hz,1H),8.27-8.25(d,J=8.8Hz,1H),8.20-8.18(d,J=8.0Hz,1H),8.07-8.05(d,J=8.8 Hz,1H),7.80-7.76(t,J=7.6Hz,1H),7.70-7.68(d,J=7.6Hz,1H),7.66-7.64(d,J=8.8Hz, 1H),7.56(s,1H),7.28(s,1H),7.22-7.19(d,J=8.4Hz,1H),6.96-6.93(d,J=15.2Hz,1H),4.71-4.66(m,2H),2.76-2.73(m,4H),2.32(s,3H),2.00(s,6H),1.91-1.86(t,J=9.2Hz,2H), 1.49-1.46(t,J=7.0Hz,3H);13C NMR(100MHz,DMSO-d6,ppm):δ184.56,174.21,155.92, 153.12,149.52,143.78,142.43,139.28,137.98,137.90,137.42,136.71,136.38,135.36,133.64, 132.93,132.13,131.98,128.09,126.96,122.62,118.11,113.67,57.93,46.87,37.05,32.18, 31.74,26.30,25.21,18.75。HRMS:(C33H32NO2S+)m/z:计算值[M]+:506.2148.实测值 [M]+:506.2168.
探针3的荧光检测应用:
将探针配成浓度为5.0×10-3mol/L的DMSO溶液,避光保存备用。检测方法如下:
1)探针3的选择性检测
分别将探针在磷酸缓冲溶液(含25%乙醇,10mM,pH=7.4)中配置成10μM的待测液3mL,然后分别加入300μM的不同分析物(N2H4,羟胺,苯胺,硫脲,K+,Na+,Ca+, Mg2+,Cu2+,Fe3+,Hg2+,F-,Br-,Cl-,I-,ClO4 -,SO4 2-,AcO-,CO3 2-,H2PO4 -),测试各溶液稳定后的荧光发射强度。由图2可知,这些分析物对探针的荧光几乎都没有明显影响,只有加入肼溶液可以引起荧光强度的明显增强。插图为溶液颜色变化。
2)不同浓度的肼对荧光探针3的滴定检测
取上述10μM的待测液3mL,依次加入不同浓度的肼溶液,在室温下充分作用后进行荧光检测(λex=730nm,λem=805nm)。如图3所示,溶液浓度增加,荧光迅速增强,当肼浓度达到300μM时,体系荧光强度达到饱和状态。
3)探针3用于实际检测
配制含微量肼的溶液,滴在探针试纸条上,观察试纸条颜色变化,如图4所示,在试纸上观察到明显的颜色变化。
以上内容是结合具体的实施方式对本发明所作的进一步详细说明,不能认定本发明的具体实施只局限于这些说明,对于本发明所属技术领域的普通技术人员来说,在作为荧光探针是本发明新荧光染料的一种用途,不能认定本发明的化合物仅用于荧光探针。
Claims (8)
3.根据权利要求2所述的制备方法,其特征在于,步骤(1)中,所述化合物1、3-羟基苯硫酚、碳酸钾的物质的量比为1:2:2;步骤(2)中,所述化合物2、乙酰氯、三乙胺的物质的量比为1:2:2。
4.根据权利要求2所述的制备方法,其特征在于,步骤(1)中,所述加热温度为60℃,反应时间为5h;步骤(2)中,反应时间为1h。
5.根据权利要求2所述的制备方法,其特征在于,步骤(1)中,所述分离提纯步骤为,将反应液在真空下减压浓缩成粗产物,用柱层析纯化;所用洗脱液为体积比100:1-5的二氯甲烷-甲醇的混合溶液。
6.根据权利要求2所述的制备方法,其特征在于,步骤(2)中,所述分离提纯步骤为将反应液在真空下减压浓缩成粗产物,用柱层析纯化;所用洗脱液为体积比100:1-5的二氯甲烷-甲醇的混合溶液。
7.一种如权利要求1所述荧光探针的用途,其特征在于,所述荧光探针用于水中肼的检测。
8.根据权利要求7所述的应用,其特征在于,荧光探针的激发波长为730nm,发射波长为805nm。
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CN115032181B (zh) * | 2022-04-25 | 2024-04-26 | 宜宾天原科创设计有限公司 | 酮连氮水合肼副产物异丙基肼的定量分析方法 |
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