CN109134379B - 一种三苯胺-咪唑衍生物及其制备方法与应用 - Google Patents
一种三苯胺-咪唑衍生物及其制备方法与应用 Download PDFInfo
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Abstract
一种三苯胺‑咪唑衍生物及其制备方法与应用,本发明公开了一种式(I‑a)所示的三苯胺衍生物,并公开了其制备方法,合成方法简单易操作。本发明提供的三苯胺衍生物具有光致发光性能,可用作光致发光材料。
Description
(一)技术领域
本发明涉及一种三苯胺-咪唑衍生物及其制备方法与应用。
(二)背景技术
随着全球能源的急剧消耗和环境的不断恶化,人们对能源问题认识的日益深入,寻求新型、清洁、节能的环保型材料显得尤为重要。发光材料被人们看作一种环境友好的绿色光源,对无机物发光的研究和应用已经有了较长的历史,但无机发光材料存在一些难以克服的缺点,如种类少、可调节性小、使用条件苛刻等。因此,对有机发光材料的探索应运而生。有机分子具有大共轭体系,在电或光等的激发下容易产生电子能级的跃迁发出不同波长的光。由于有机化合物的种类繁多,且结构多样,可以满足各种不同的用途,近年来在发光领域日益受到人们的重视。
三苯胺类化合物作为一类重要的有机发光材料,表现出了优异的发光性质,在细胞成像、有机发光二极管(OLED)、有机场效应晶体管等多个方面具有广泛的应用。咪唑环属于缺电子非中心对称结,引入强的吸电子或供电子基团能促进分子内电荷转移,具有良好的电子转输性能和高热稳定性,其结构的特殊性使其具有很强的光学性能和较高的杀菌活性。但是现有的三苯胺-咪唑衍生物分子在具有良好的发光性质的同时通常不稳定。
(三)发明内容
本发明的目的之一在于提供一种三苯胺-咪唑衍生物及其制备方法。
本发明的技术方案如下:
一种如式(I-a)所示的三苯胺-咪唑衍生物:
本发明还提供了所述式(I-a)所示的三苯胺-咪唑衍生物的制备方法具体按照如下步骤进行:
(1)氮气保护下,将式(II-a)所示的4-二苯胺基苯甲醛、式(II-b)所示的苯偶酰、式(II-c)所示的4-氟苯胺、醋酸铵溶解于醋酸中,于110~120℃下反应20~24h,反应完全后得到反应液A,经后处理得到式(III-a)所示的中间化合物;所述式(II-a)所示的4-二苯胺基苯甲醛、式(II-b)所示的苯偶酰、式(II-c)所示的4-氟苯胺、醋酸铵的投料物质的量之比为1:1.1~1.3:3.5~4.5:5~6;
(2)将式(III-a)所示的中间化合物溶解在二氯甲烷中,室温下在365nm紫外灯下光照5~8天得到反应液B经后处理,得到式(I-a)所示的三苯胺-咪唑衍生物;
进一步,步骤(1)中,所述醋酸的体积用量以式(II-a)所示的4-二苯胺基苯甲醛的质量计为30~50mL/g。
进一步,步骤(1)中,所述反应液A的后处理的方法为:反应结束后,待反应液A冷却至20~30℃,加入水和二氯甲烷进行萃取,收集有机相,经无水硫酸镁干燥,减压浓缩,再进行柱层析纯化,以300~400目硅胶为固定相,二氯甲烷/石油醚体积比3:1混合液为流动相进行洗脱,收集含目标化合物的洗脱液,减压蒸除溶剂并干燥,得到式(III-a)所示的中间化合物。
进一步,步骤(2)中,所述二氯甲烷的体积用量以式(III-a)所示的中间化合物的质量计为30~50mL/g。
进一步,步骤(2)中,所述反应液B的后处理的方法为:反应结束后,将所述的反应液B减压浓缩,进行柱层析纯化,以300~400目硅胶为固定相,石油醚/二氯甲烷体积比1:1~2混合液为流动相进行洗脱,收集含目标化合物的洗脱液,减压蒸除溶剂并干燥,得到式(I-a)所示的目标产物。
本发明通过核磁共振氢谱(1H NMR)和质谱(MS)表征了目标产物。
本发明的目的之二在于所述的三苯胺-咪唑衍生物可用于制备光致变色材料。
与现有技术相比,本发明的有益效果在于:
本发明所述的三苯胺-咪唑衍生物制备方法新颖,利用光反应,绿色环保,有利于工业化生产,同时具有良好的稳定性和发光效果,在光致变色材料领域有很好的应用前景。
(四)附图说明
图1:本发明实施例1中化合物(I-a)的合成路线及化学结构;
图2:本发明实施例1中化合物(I-a)的紫外吸收光谱;
图3:本发明实施例1中化合物(I-a)的荧光发射光谱。
(五)具体实施方式
下面以具体实施例对本发明的技术方案作进一步说明,但本发明的保护范围不限于此。
实施例1(III-a)的合成
(1)在氮气保护下,将4-二苯胺基苯甲醛(0.55g,2mmol)、苯偶酰(0.51g,2.4mmol)、4-氟苯胺(0.89g,8mmol)、醋酸铵(0.77g,10mmol)溶解于20ml醋酸中,于120℃下反应24h。待体系冷却后用去离子水和二氯甲烷萃取,所得有机相加入无水MgSO4干燥后,减压浓缩,再用柱层析分离提纯,固定相为300-400目硅胶,流动相为二氯甲烷/石油醚(体积比3:1),最后得到白色固态的中间体产物0.83g,产率为74%。1H NMR(500MHz,DMSO)δ:7.48(d,J=7.1Hz,2H),7.30-7.38(m,9H),7.30-7.22(m,6H),7.16-7.22(m,3H),7.09(t,J=7.4Hz,2H),7.03(d,J=7.5Hz,4H),6.83(d,J=8.8Hz,2H).MALDI-TOFMS理论值(C39H28FN3)m/z:557.66,实测值:559.1。
(2)将中间化合物(III-a)(500mg,0.9mmol)溶解在20ml二氯甲烷中,在365nm紫外灯下光照8天,之后将反应液减压浓缩,进行柱层析纯化,以300~400目硅胶为固定相,石油醚/二氯甲烷体积比1:1~2混合液为流动相进行洗脱,收集含目标化合物的洗脱液,减压蒸除溶剂并干燥,最后得到白色固体产物(I-a)32mg,产率6.2%。1H NMR(500MHz,DMSO)δ:7.53(d,J=7.2Hz,4H),7.40(d,J=7.5Hz,4H),7.33-7.38(m,8H),7.27-7.33(m,4H),7.15(t,J=7.4Hz,2H),7.08(d,J=7.4Hz,4H),6.80(d,J=8.9Hz,2H).MS(ESI)理论值(C39H28FN3O)m/z:573.7,实测值:574.2。
实施例2(III-a)的合成
(1)在氮气保护下,将4-二苯胺基苯甲醛(0.55g,2mmol)、苯偶酰(0.51g,2.4mmol)、4-氟苯胺(0.89g,8mmol)、醋酸铵(0.77g,10mmol)溶解于20ml醋酸中,于110℃下反应20h。待体系冷却后用去离子水和二氯甲烷萃取,所得有机相加入无水MgSO4干燥后,减压浓缩,再用柱层析分离提纯,固定相为300-400目硅胶,流动相为二氯甲烷/石油醚(体积比3:1),最后得到白色固态的中间体产物0.79g,产率为71%。1H NMR(500MHz,DMSO)δ:7.48(d,J=7.1Hz,2H),7.30-7.38(m,9H),7.30-7.22(m,6H),7.16-7.22(m,3H),7.09(t,J=7.4Hz,2H),7.03(d,J=7.5Hz,4H),6.83(d,J=8.8Hz,2H).MALDI-TOFMS理论值(C39H28FN3)m/z:557.66,实测值:559.1。
(2)将中间化合物(III-a)(500mg,0.9mmol)溶解在20ml二氯甲烷中,在365nm紫外灯下光照5天,之后将反应液减压浓缩,进行柱层析纯化,以300~400目硅胶为固定相,石油醚/二氯甲烷体积比1:1~2混合液为流动相进行洗脱,收集含目标化合物的洗脱液,减压蒸除溶剂并干燥,最后得到白色固体产物(I-a)30mg,产率5.8%。1H NMR(500MHz,DMSO)δ:7.53(d,J=7.2Hz,4H),7.40(d,J=7.5Hz,4H),7.33-7.38(m,8H),7.27-7.33(m,4H),7.15(t,J=7.4Hz,2H),7.08(d,J=7.4Hz,4H),6.80(d,J=8.9Hz,2H).MS(ESI)理论值(C39H28FN3O)m/z:573.7,实测值:574.2。
实施例3将实施例1得到的固体粉末(I-a)溶解在甲苯中,浓度为10-5mol/L,测试溶液的紫外吸收光谱,得到其特征紫外吸收光谱图,如图2所示,原位紫外吸收无变化,证明其光稳定性良好。
实施例4将实施例1得到的固体粉末(I-a)溶解在正己烷中,浓度为10-5mol/L,测试溶液的荧光光谱,得到其特征荧光发射光谱图,如图3所示,证实其具备光致发光性能。
Claims (7)
2.如权利要求1所述的式(I-a)所示的三苯胺-咪唑衍生物的制备方法,其特征在于:所述的方法具体按照如下步骤进行:
(1)氮气保护下,将式(II-a)所示的4-二苯胺基苯甲醛、式(II-b)所示的苯偶酰、式(II-c)所示的4-氟苯胺、醋酸铵溶解于醋酸中,于110~120℃下反应20~24h,反应完全后得到反应液A,经后处理得到式(III-a)所示的中间化合物;所述式(II-a)所示的4-二苯胺基苯甲醛、式(II-b)所示的苯偶酰、式(II-c)所示的4-氟苯胺、醋酸铵的投料物质的量之比为1:1.1~1.3:3.5~4.5:5~6;
(2)将式(III-a)所示的中间化合物溶解在二氯甲烷中,室温下在365nm紫外灯下光照5~8天得到反应液B经后处理,得到式(I-a)所示的三苯胺-咪唑衍生物;
3.权利要求2所述的方法,其特征在于:步骤(1)中,所述醋酸的体积用量以式(II-a)所示的4-二苯胺基苯甲醛的质量计为30~50mL/g。
4.权利要求2所述的方法,其特征在于:步骤(1)中,所述反应液A的后处理的方法为:反应结束后,待反应液A冷却至20~30℃,加入水和二氯甲烷进行萃取,收集有机相,经无水硫酸镁干燥,减压浓缩,再进行柱层析纯化,以300~400目硅胶为固定相,二氯甲烷/石油醚体积比3:1混合液为流动相进行洗脱,收集含目标化合物的洗脱液,减压蒸除溶剂并干燥,得到式(III-a)所示的中间化合物。
5.权利要求2所述的方法,其特征在于:步骤(2)中,所述二氯甲烷的体积用量以式(III-a)所示的中间化合物的质量计为30~50mL/g。
6.权利要求2所述的方法,其特征在于:步骤(2)中,所述反应液B的后处理的方法为:反应结束后,将所述的反应液B减压浓缩,进行柱层析纯化,以300~400目硅胶为固定相,石油醚/二氯甲烷体积比1:1~2混合液为流动相进行洗脱,收集含目标化合物的洗脱液,减压蒸除溶剂并干燥,得到式(I-a)所示的目标产物。
7.如权利要求1所述的三苯胺-咪唑衍生物在制备光致变色材料中的应用。
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