CN115356315A - 一种用荧烷类衍生物探针检测硫化氢方法 - Google Patents
一种用荧烷类衍生物探针检测硫化氢方法 Download PDFInfo
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Abstract
Description
技术领域
本发明涉及一种硫化氢检测方法,特别是涉及一种用荧烷类衍生物探针检测硫化氢方法。
背景技术
硫化氢(H2S)是一种具有刺激性的无色气体,被生物体吸收后会影响细胞的氧化过程。低浓度的硫化氢接触会对呼吸道产生局部刺激作用,高浓度接触时表现为中枢神经系统症状和窒息症状。硫化氢虽然为一种剧毒气体,但是内源性硫化氢被研究者认为是第三种气体信号分子。内源性硫化氢可参与多种生理活动,例如血管舒张、细胞保护、神经传导、凋亡、糖代谢、胰岛素分泌等。可见,对低浓度硫化氢的准确测定在疾病诊断方面非常有意义。
目前检测硫化氢的分析方法主要包括汞量法、检测管法、亚甲基蓝比色法、荧光探针法等方法,众多方法中荧光探针法选择性较好、操作方便、检测灵敏度高。而荧烷类化合物由于其结构中的氧桥结构,使整个分子保持了较强的刚性平面结构,有利于产生强烈的荧光。
发明内容
本发明的目的在于提供一种用荧烷类衍生物探针检测硫化氢方法,本发明基于荧烷母核,设计并合成了荧烷类衍生物的荧光探针,其结构中的叠氮取代基用于硫化氢的检测,与硫化氢接触后被还原为氨基,探针的化学结构发生变化导致荧光光谱的变化,实现硫化氢的定量检测,响应速度快,专抗干扰性强。
本发明的目的是通过以下技术方案实现的:
一种用荧烷类衍生物探针检测硫化氢方法,所述方法包括以下步骤:
(1)制备的荧烷类衍生物探针其化学结构通式如下:
其中,R1、R2为正丁基或苯基,R3为苯氧基、1-萘氧基或有取代基的苯氧基,所述的取代基为硝基、三氟甲基;
(2)制备的2-叠氮-3-(3-硝基苯基)-6-二丁基氨基荧烷作为荧光探针,溶解于PBS:乙醇混合液(9:1)中配制探针储备液,浓度为10 μM;使用PBS:乙醇混合液(9:1)配制系列离子或分子浓度为10 μM的溶液,将两者以相同提体积混合,30 oC下静置30分钟,测量并记录其在563 nm下的荧光强度,发现仅加入硫化钠(硫化氢释放剂)的溶液有较强的荧光,用荧光分光光度计实现微量硫化氢的定量检测即可。
所述的一种用荧烷类衍生物探针检测硫化氢方法,所述R3为下列之一:苯氧基、1-萘氧基、3-三氟甲基苯基、3-硝基苯基。
所述的一种用荧烷类衍生物探针检测硫化氢方法,所述的荧光探针在563 nm的荧光强度与待测硫化氢浓度之间的标准曲线为y = 229.36x + 4.27 。
本发明的优点与效果是:
本发明的荧烷类衍生物探针可使用荧光分光光度计实现微量硫化氢的定量检测,操作简单,方便快捷,提高检测效率,提供一类荧烷类衍生物。该类荧光探针制备工艺操作方便、产品后处理方法简易、转化率较高,易实现工业化生产;灵敏度高,荧光发射光谱特性良好,探针与待测物反应所需时间短,30分钟内性质稳定,通过标准曲线测定硫化氢含量。
附图说明
图1为本发明 2-叠氮-3-(3-硝基苯基)-6-二丁基氨基荧烷作为荧光探针与不同离子或分子反应后荧光强度图;
图2为本发明 2-叠氮-3-(3-硝基苯基)-6-二丁基氨基荧烷作为荧光探针的荧光强度与硫化氢浓度的线性关系图;
图3为 本发明2-叠氮-3-(3-硝基苯基)-6-二丁基氨基荧烷作为荧光探针与不同浓度硫化氢反应后的荧光光谱图;
图4为本发明 2-叠氮-3-(3-硝基苯基)-6-二丁基氨基荧烷作为荧光探针检测硫化氢时荧光强度随时间的变化趋势图。
具体实施方式
下面结合附图所示实施例对本发明进行详细说明。
实施例1:2-叠氮-3-苯氧基-6-二苯基氨基荧烷的合成(R1和R2为苯基,R3为苯氧基)
氮气保护下,在11.0 g硫酸中加入2.15 g的2-苯氧基-4-甲氧基苯胺,随后加入4.09 g的2-羧基-4’-二苯基氨基-2’-羟基二苯甲酮固体,反应体系逐渐粘稠,升温至40oC,搅拌4小时。反应结束后,将混合物倒入至25 g冰水混合物中,析出固体,过滤后收集滤饼。滤饼重新分散于30 g去离子水中,氮气保护下滴加75 g的10%氢氧化钠水溶液,滴加结束后升温至80 oC并保持2小时,加入20.00 g甲苯,继续加热至回流并保持搅拌0.5小时,降温至10 oC以下,过滤收集析出的白色固体使用15.00 g甲苯和15.00 g正己烷依次淋洗,干燥后产物为2-氨基-3-苯氧基-6-二苯基氨基荧烷,真空干燥后共4.25 g,收率约60%。
氮气保护下,向12 mL乙醇中加入本例中制备的2-氨基-3-苯氧基-6-二苯基氨基荧烷1.15 g,溶解后,加入7 mL工业盐酸,降温至5 oC,滴加1.5 mL的10%亚硝酸钠水溶液,随后滴加1.0 mL的15%叠氮化钠水溶液,整个滴加过程温度控制在5 -10 oC。反应结束后,加入24 mL水和20 mL二氯甲烷,使用二氯甲烷洗涤水相,收集有机相并干燥浓缩,得到2-叠氮-3-甲基-6-二丁基氨基荧烷共0.9074 g,收率约94%。
1H NMR (500 MHz, Chloroform-d) δ 7.95 (dd, J = 7.3, 1.6 Hz, 1H), 7.68(td, J = 7.5, 1.6 Hz, 1H), 7.51 (tt, J = 7.3, 1.4 Hz, 2H), 7.38 – 7.31 (m,2H), 7.26 (d, J = 7.5 Hz, 2H), 7.25 – 7.16 (m, 4H), 7.16 – 7.07 (m, 6H), 7.07– 6.98 (m, 5H), 6.71 (d, J = 1.5 Hz, 1H), 6.64 (s, 1H).
实施例2:2-叠氮-3-(3-三氟甲基苯基)-6-二丁基氨基荧烷的合成(R1和R2为正丁基,R3为3-三氟甲基苯基)
2-叠氮-3-(3-三氟甲基苯基)-6-二丁基氨基荧烷可通过与实施例1类似的方法合成,仅将2-苯氧基-4-甲氧基苯胺替换为2-(3-三氟甲基苯氧基)-4-甲氧基苯胺,2-羧基-4’-二苯基氨基-2’-羟基二苯甲酮替换为2-羧基-4’-二丁基氨基-2’-羟基二苯甲酮。以2-(3-三氟甲基苯氧基)-4-甲氧基苯胺计,2-叠氮-3-(3-三氟甲基苯基)-6-二丁基氨基荧烷收率约65%。
1H NMR (500 MHz, Chloroform-d) δ 7.95 (dd, J = 7.3, 1.6 Hz, 1H), 7.68(td, J = 7.6, 1.6 Hz, 1H), 7.51 (tt, J = 7.3, 1.4 Hz, 2H), 7.37 (dt, J = 7.5,1.6 Hz, 1H), 7.32 (t, J = 7.4 Hz, 1H), 7.27 (t, J = 1.5 Hz, 1H), 7.11 (t, J =3.8 Hz, 2H), 6.94 (dt, J = 7.3, 1.6 Hz, 1H), 6.66 – 6.59 (m, 2H), 6.25 (d, J= 1.5 Hz, 1H), 3.15 – 3.02 (m, 4H), 1.64 (dp, J = 12.3, 7.1 Hz, 2H), 1.53(dp, J = 12.3, 7.0 Hz, 2H), 1.42 (ddtd, J = 14.8, 12.3, 8.0, 7.0 Hz, 2H),1.36 – 1.22 (m, 2H), 0.95 (t, J = 7.9 Hz, 6H).
实施例3:2-叠氮-3-(3-硝基苯基)-6-二丁基氨基荧烷的合成(R1和R2为正丁基,R3为3-硝基苯基)
2-叠氮-3-(3-硝基苯基)-6-二丁基氨基荧烷可通过与实施例2类似的方法合成,仅将2-(3-三氟甲基苯氧基)-4-甲氧基苯胺替换为2-(3-硝基苯基)-4-甲氧基苯胺。以2-(3-硝基苯基)-4-甲氧基苯胺计,2-叠氮-3-(3-硝基苯基)-6-二丁基氨基荧烷收率约55%。
1H NMR (500 MHz, Chloroform-d) δ 8.00 (dt, J = 7.5, 1.6 Hz, 1H), 7.95(dd, J = 7.3, 1.6 Hz, 1H), 7.68 (td, J = 7.6, 1.6 Hz, 1H), 7.51 (tt, J = 7.3,1.4 Hz, 2H), 7.44 (t, J = 7.5 Hz, 1H), 7.35 (t, J = 1.6 Hz, 1H), 7.22 (dt, J= 7.5, 1.5 Hz, 1H), 7.11 (t, J = 3.8 Hz, 2H), 6.66 – 6.59 (m, 2H), 6.25 (d, J= 1.5 Hz, 1H), 3.15 – 3.02 (m, 4H), 1.64 (dp, J = 12.4, 7.1 Hz, 2H), 1.53(dp, J = 12.3, 7.1 Hz, 2H), 1.48 – 1.22 (m, 4H), 0.95 (t, J = 8.0 Hz, 6H).
实施例4:2-叠氮-3-(1-萘氧基)-6-二丁基氨基荧烷的合成(R1和R2为正丁基,R3为1-萘氧基)
2-叠氮-3-(1-萘氧基)-6-二丁基氨基荧烷可通过与实施例2类似的方法合成,仅将2-(3-三氟甲基苯氧基)-4-甲氧基苯胺替换为2-(1-萘氧基)-4-甲氧基苯胺。以2-(1-萘氧基)-4-甲氧基苯胺计,2-叠氮-3-(1-萘氧基)-6-二丁基氨基荧烷收率约62%。
1H NMR (500 MHz, Chloroform-d) δ 8.31 – 8.26 (m, 1H), 7.95 (dd, J =7.3, 1.6 Hz, 1H), 7.79 (dt, J = 7.4, 1.6 Hz, 1H), 7.75 (dt, J = 7.5, 1.4 Hz,1H), 7.68 (td, J = 7.6, 1.5 Hz, 1H), 7.59 (td, J = 7.4, 1.6 Hz, 1H), 7.56 –7.43 (m, 4H), 7.29 (dd, J = 7.6, 1.6 Hz, 1H), 7.11 (t, J = 3.8 Hz, 2H), 6.65(s, 1H), 6.62 (dd, J = 7.4, 1.5 Hz, 1H), 6.25 (d, J = 1.5 Hz, 1H), 3.15 –3.02 (m, 4H), 1.64 (dp, J = 12.3, 7.1 Hz, 2H), 1.53 (dp, J = 12.3, 7.0 Hz,2H), 1.42 (ddtd, J = 14.8, 12.3, 8.0, 7.0 Hz, 2H), 1.36 – 1.22 (m, 2H), 0.95(t, J = 7.9 Hz, 6H).
实施例5:2-叠氮-3-(3-硝基苯基)-6-二丁基氨基荧烷作为荧光探针对不同离子或分子的选择性
使用实施例3中制备的2-叠氮-3-(3-硝基苯基)-6-二丁基氨基荧烷作为荧光探针,溶解于PBS:乙醇混合液(9:1)中配制探针储备液,浓度为10 μM。使用PBS:乙醇混合液(9:1)配制一系列不同离子或分子浓度为10 μM的溶液,将两者以相同提体积混合,30 oC下静置30分钟,测量并记录其在563 nm下的荧光强度,发现仅加入硫化钠(硫化氢释放剂)的溶液有较强的荧光,其他组包括空白组均无荧光响应,选择性好,抗干扰性强。(图1)
实施例6:2-叠氮-3-(3-硝基苯基)-6-二丁基氨基荧烷作为荧光探针与硫化氢浓度的线性关系
使用实施例3中制备的2-叠氮-3-(3-硝基苯基)-6-二丁基氨基荧烷作为荧光探针,溶解于PBS:乙醇混合液(9:1)中配制探针储备液,浓度为200 μM。使用PBS:乙醇混合液(9:1)配制硫化钠(硫化氢释放剂)溶液,与探针储备液混合后,定容,使体系中硫化氢浓度分别为0、0.1、0.2、0.5、1.0、2.0、5.0、10.0、20.0、50.0、100.0、200.0 μM,30 oC下静置30分钟,测量并记录其在563 nm下的荧光强度,发现荧光强度随硫化氢浓度提高而升高(图3),在0.1 – 20.0 μM区间内线性良好(图2),相关系数0.9979,可使用y = 229.36x + 4.27根据测量值计算溶液中硫化氢的浓度。其中,y为563 nm下荧光测量值,x为待测液中硫化氢浓度,单位μM。
实施例7:2-叠氮-3-(3-硝基苯基)-6-二丁基氨基荧烷作为荧光探针与硫化氢反应后荧光强度与混合时间的关系
依照实施例6中所述硫化氢浓度为10.0 μM的样品的配制方法,混合后开始计时,反应温度控制为30 oC,在不同时间连续测量其荧光强度。通过记录值分析,2-叠氮-3-(3-硝基苯基)-6-二丁基氨基荧烷作为荧光探针与硫化氢反应在30 oC下仅需12分钟左右即接近荧光最大强度,且在30分钟内荧光强度稳定。探针响应速度快,与待测物接触30分钟内性质依然稳定,有足够长的时间窗口用于测试。(图4)
可以理解的是,以上关于本发明的具体描述,仅用于说明本发明而并非受限于本发明实施例所描述的技术方案,本领域的普通技术人员应当理解,仍然可以对本发明进行修改或等同替换,以达到相同的技术效果 ;只要满足使用需要,都在本发明的保护范围之内。
Claims (3)
1.一种用荧烷类衍生物探针检测硫化氢方法,其特征在于,所述方法包括以下步骤:
(1)制备的荧烷类衍生物探针其化学结构通式如下:
其中,R1、R2为正丁基或苯基,R3为苯氧基、1-萘氧基或有取代基的苯氧基,所述的取代基为硝基、三氟甲基;
(2)制备的2-叠氮-3-(3-硝基苯基)-6-二丁基氨基荧烷作为荧光探针,溶解于PBS:乙醇混合液(9:1)中配制探针储备液,浓度为10 μM;使用PBS:乙醇混合液(9:1)配制系列离子或分子浓度为10 μM的溶液,将两者以相同提体积混合,30 oC下静置30分钟,测量并记录其在563 nm下的荧光强度,发现仅加入硫化钠(硫化氢释放剂)的溶液有较强的荧光,用荧光分光光度计实现微量硫化氢的定量检测即可。
2.如权利要求1所述的一种用荧烷类衍生物探针检测硫化氢方法,其特征在于,所述R3为下列之一:苯氧基、1-萘氧基、3-三氟甲基苯基、3-硝基苯基。
3.如权利要求1所述的一种用荧烷类衍生物探针检测硫化氢方法,其特征在于,所述的荧光探针在563 nm的荧光强度与待测硫化氢浓度之间的标准曲线为y = 229.36x + 4.27。
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