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1、近红外苊并吡嗪荧光染料的合成 【论文标题】 近红外苊并吡嗪荧光染料的合成 【英文标题】 Synthesis of Acenaphtho-pyrazine Dyes with Near-infrared Flurescence【中文摘要】 大部分生物荧光探针的主要应用障碍是荧光发射波长较短,易受到生物质荧光背景的干扰。开发红外长波长生物荧光染料,对于提高检测灵敏性具有很高的应用价值。本论文以苊醌为原料通过硝化、缩合、取代合成了染料Ap-1c和AP-2c,其中染料AP-2c保持了1,8-萘酰亚胺的荧光性能;而以苊并吡嗪为母体的染料Ap-1c,则达到了610 nm的长波长荧光发射、127nm的大范围
2、stokes位移的近红外荧光染料的要求。由于利用苊醌双硝化中间体,难以得到其它衍生的苊并吡嗪化合物,本文以苊为原料,通过溴代、硝化、氧化,及合成条件优化,合成一个新的荧光染料中间体4-溴-5-硝基苊醌(P1)。基于该染料中间体合成出苊并吡嗪Ap-1系列的6个新化合物Ap-1a,Ap-1b,Ap-1c,Ap-1d,Ap-1e和Ap-1f。通过系列的性能测试,发现这些苊并吡嗪类荧光染料Ap-1普遍具有荧光发射波长较长,stokes位移大的优点。具有4-(N-苯基乙二胺)基团的染料Ap-1d,在乙腈:水=80:20的体系中,荧光发射波长达632 nm,stokes位移达172 nm,加入Cu2+离子
3、能使荧光强度增大。通过模型化合物Ap-1d的性能可以预测,具有4,5-二(N-苯基乙二胺基团)染料Ap-1f可作为Cu2+荧光增强型近红外荧光探针。染料Ap-1f的合成、分离纯化及其特性需进一步研究。本文第三节以萘酰亚胺为母体,设计合成了Co2+离子荧光探针CoProbe,并对其性能进行了系统的测试,发现该探针在生物环境的pH=6-8范围内,对Co2+具有荧光淬灭和吸收波长红移的双通道模式高度专一的识别。由于探针CoProbe结构不稳定,荧光发射波长较短,结合Co2+离子后荧光淬灭严重等因素,限制了其实用性。但是,探针CoProbe中对Co2+的高选择性受体,对设计功能优异的钴离子荧光探针提供
4、了可能。【英文摘要】 The main applicative problems with most biolocal fluorecent probe were short emission fluorescence wavelength that would be strongly disturbed by the background fluorecence from biomass in ordinary fluorecence zone. So the exploiture of near-infrared biological dyes withlong emission wave
5、length was of great value for the improvement on testing sensitivity.Novel fluorescent dye Ap-1c and dye Ap-2c were designed and synthesized through 3-step reaction including intration, condensation and substitution with acenaphthrenequinone as a raw material. Ap-2c retained the fluorescence perform
6、ance of 1, 8-naphthaIimide, while Ap-1c had 610 nm near-infrared fluorecent emission wavelength and stokes shift as large as 127 nm which made Ap-1c a qualified near-infrared flurescence dye.As the method diintration of acenaphthrenequinone did not work out for the synthesis of other acenaphtho-pyra
7、zine compounds, a new intermedia 4-bromo-5-nitro acenaphthrenequinone (P1) was designed, synthesised and optimized as well. Based on P1, a series of 6 new acenaphtho-pyrazine compounds named as Ap-1a to Ap-1f were designed and synthesized. Through series of test, common adventages like long emission
8、 wavelength and large stokes shift were found among acenaphtho-pyrazine dyes. Especially, the 2-phenylamino acenaphtho-pyrazine dye Ap-1d was found emission wavelength as long as 632 nm , stokes shift as large as 172 nm in acetonitrile-water (80:20, v/v) solution and fluorescence intensity enhanced
9、by Cu2+ ion which concluded that Ap-1f would be proper as near-infrared fluorescent probe for Cu2+ ion. However, as was difficult to seperate, Ap-1f could not be tested right now.Fluorecence probe CoProbe was designed and synthsised based on naphthalimide, the testing result showed that CoProbe had
10、altitudinal recognise property for Co2+ ion through 2 channel changes in UV-absorbance and fluorescence intensity. However, with objection like unstable structure and performance, short fluorecence wavelength, quenched fluorescent wavelength after coupling with Co2+ ion, CoProbe was not suitable for
11、 practical application. However, the highly selective acceptor of CoProbe made the design of better probe for Cobalt ion possible.【中文关键词】 荧光; 近红外; 染料; 苊并吡嗪; 苊醌 【英文关键词】 Fluoresence; Near-infrared; Dye; acenaphtho-pyrazine; acenaphthrenequinone 【论文目录】 摘要 4-5 Abstract 5 1 文献综述 8-27 1.1 荧光概述 9-13 1.1.1
12、荧光的发现与发展 9 1.1.2 荧光的发光原理 9-11 1.1.3 荧光的性质 11-12 1.1.4 影响荧光的环境因素 12-13 1.2 有机荧光探针 13-25 1.2.1 概述 14 1.2.2 荧光信号 14-19 1.2.3 荧光的发光原理 19-21 1.2.4 常用荧光团 21-25 1.3 本研究工作的意义 25-27 1.3.1 近红外荧光染料 25 1.3.2 铜离子的重要性 25-26 1.3.3 钴离子的危害 26-27 2 近红外苊并吡嗪荧光染料的设计与合成 27-55 2.1 本研究工作的主要内容 27-29 2.2 实验部分 29-38 2.2.1 实验药
13、品与试剂 29 2.2.2 表征仪器 29 2.2.3 原料及中间体的合成 29-32 2.2.4 目标化合物的合成 32-38 2.3 结果与讨论 38-54 2.3.1 重要中间体4.溴-5硝基苊醌(P1)的制备 38-40 2.3.2 Ap-lf的合成难度分析 40-43 2.3.3 苊并吡嗪染料的性能 43-48 2.3.4 pH对Ap-1的影响 48-50 2.3.5 溶剂效应 50-52 2.3.6 Cu(2+)离子对染料的光学性质影响 52-54 2.4 本章小结 54-55 3 萘酰亚胺类钴离子荧光探针的设计与合成 55-69 3.1 钴离子的检测和钻离子探针的研究进展 55-
14、56 3.2 本章主要内容 56-57 3.3 实验部分 57-62 3.3.1 原料和仪器 57-58 3.3.2 中间体及目标化合物的合成 58-62 3.4 结果与讨论 62-68 3.4.1 pH对CoProbe光谱性质的影响 62-63 3.4.2 金属离子对CoProbe荧光光谱的影响 63-64 3.4.3 Cu(2+)、Co(2+)和Ni(2)对CoProbe吸收光谱的影响 64-66 3.4.4 CoProbe对Co(2+)的识别 66-68 3.5 本章小结 68-69 结论 69-70 参考文献 70-77 附录A 论文中涉及的核磁谱图 77-85 攻读硕士学位期间发表学术论文情况 85-86 致谢 86-87
