CN115160252A - 一种以唑类基团为桥链的芳香胺化合物及其制备和应用 - Google Patents
一种以唑类基团为桥链的芳香胺化合物及其制备和应用 Download PDFInfo
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Abstract
本发明公开了一种以唑类基团为桥链的芳香胺化合物及其制备和应用,所述的以唑类基团为桥链的芳香胺化合物,结构通式为式中,Ar1‑Ar4独立地表示C1‑C20的烷基、C6‑C30的芳基、C3‑C30的杂芳基、C6‑C60的三芳香胺基、C6‑C60的咔唑基;且Ar1和Ar2能通过连接成环;Ar3和Ar4能通过连接成环;L1和L2独立地表示为单键;X独立地表示为CR1R2、O、S、SO2、Se,NR3;其中,R1‑R3独立地表示为氢或卤素、C1‑C20的烷基、C6‑C30的芳基、C3‑C30的杂芳基;且R1和R2能通过连接成环。本发明提供的以唑类基团为桥链的芳香胺化合物适合作为使用有机电致发光材料的器件,可以有效提高器件的发光效率,延长器件的使用寿命。
Description
技术领域
本发明涉及有机电致发光材料技术领域,具体涉及一种以唑类基团为桥链的芳香胺化合物。本发明还涉及该芳香胺化合物的制备方法和应用。
背景技术
伴随科技和经济的发展,人们对与生活息息相关的显示和照明技术的要求也在提高,新型的显示和照明技术不仅要满足人眼对于色彩的要求,而且还要做到健康和环保。有机电致发光器件(OLEDs)作为一种新型的显示技术,具有能耗低、像素切换自如、显示响应时间短、色彩对比度高等优点,基板的多元化选择为柔性和透明显示提供可能,而有机电致发光材料的使用使得器件更加轻薄,环保,极大地促进了有机电致发光显示技术在手机、平板显示器、电视、照明和车载显示等领域的应用。目前,常见的有机电致发光器件采用夹层式三明治结构,即有机层夹在两侧阳极和阴极之间,有机层按照各种材料不同的光电特性分为空穴传输层、电子传输层、发光层、空穴阻挡层和电子阻挡层等。这类器件的发光机理主要为:在外界电压驱动下,空穴和电子克服能垒,分别由阳极和阴极注入到空穴传输层和电子传输层,然后在发光层中复合并释放能量,并把能量传递给有机发光物质。发光物质得到能量,并使其从基态跃迁到激发态,当受激发分子重新跃迁到基态,就产生了发光现象。
近年来,有机电致发光器件的发光效率有了很大的提升,内部量子效率已经接近理论极限,但是外量子效率与理论值相比还存在较大的差距。为此,人们开发了使用顶部发射结构的发光器件,这种器件将具有高功函的金属用于阳极并且从上方发光。这种发光器件中,放光元件从发光层发射的光入射到另一膜上时,仅约20%发射光可用,其余的光以导波形式限制在有机材料薄膜、ITO薄膜和玻璃衬底中,限制了其应用。
围绕上述技术缺陷,人们进一步提出了在电极的外部增加一层折射率高材料(即光提取层或CPL层)的改进方案。如Riel等人(Appl.Phys.Lett.,82,466,2003)于2003年将无机化合物ZnSe蒸镀于阴极上,利用功能层之间折射率的差异提高光取出效率,但这类无机材料蒸发温度高、蒸发速率并未在有机电致发光器件中得到更多应用。而有机化合物由于蒸镀温度低,折射率容易调整等优点而作为光提取材料应用在有机电致发光器件上。专利WO2015001726开发了一系列基于二芳香胺和唑类化合物作为光提取层,相比较Alq3作为光提取层,电流效率和外量子效率均得到提升。专利CN110229145报道了基于氮杂苯的光提取材料,通过在氮杂苯引入两个唑类基团,制备的器件的电流效率和亮度都有所提升。专利CN112538061公开了一种基于对称的芳香胺结构的有机电致发光化合物,以联苯或者三联苯为桥链,两端引入唑类基团,以此为光提取层制备的器件电压和效率有所改善。
使用上述改进材料的有机电致发光器件,其外量子效率尽管得到了一定程度的改良,但在发光效率、驱动电压、寿命等方面与人们的期望依然存在明显的差距。为了更进一步提高光提取效率,开发具有高折射率并且薄膜的稳定性和耐久性优异的材料作为光提取层是急需解决的重要课题。
发明内容
为了克服现有技术中存在的上述问题,本发明提供了一种以唑类基团为桥链的芳香胺化合物,该化合物是在唑类基团的两端引入芳香胺类推电子基团、增强材料的玻璃化温度,提高化合物的热稳定性和成膜性,降低材料在可见光区域的吸收和提高折射率,作为光提取层应用在有机电致发光器件上,可以提升器件效率。该有机电子材料制作的有机电致发光器件具有优异的发光效率,器件寿命更长。
本发明提供的一种以唑类基团为桥链的芳香胺化合物,具有如结构式I所示的通式:
式中,Ar1-Ar4独立地表示为取代或未取代的C1-C20的烷基、取代或者未取代的C6-C30的芳基、取代或者未取代的C3-C30的杂芳基、取代或者未取代的C6-C60的三芳香胺基、取代或者未取代的C6-C60的咔唑基;且Ar1和Ar2能通过连接成环,Ar3和Ar4能通过连接成环;
L1和L2独立地表示为单键、苯基、联苯基或萘基;
X独立地表示为CR1R2、O、S、SO2、NR3;其中,R1-R3独立地表示为氢、卤素、取代或未取代的C1-C20的烷基、取代或未取代的C6-C30的芳基、取代或未取代的C3-C30的杂芳基;且R1和R2能通过连接成环。
优选地,Ar1-Ar4独立地表示为苯基、甲苯基、甲氧基苯基、叔丁基苯基、苯腈基、萘基、联苯基、二苯基苯基、萘基苯基、苯基萘基、C6-C30的N-芳基、C1-C4的烷基取代的咔唑基、蒽基、菲基、芘基、苝基、荧蒽基、(9,9-二烷基)芴基、(9,9-二取代或者未取代的芳基)芴基、9,9-螺芴基、C6-C60的三芳香胺基、二苯并噻吩基、二苯并呋喃基、苯并噻唑基、苯并噻吩基、苯并呋喃基、三苯胺基、吡啶基、嘧啶基、噻二唑基、三氮唑基、三氮嗪基或苯并噁唑基。
优选地,R1-R3为氢、甲基、乙基、丙基、苯基、萘基或联苯基。
优选地,所述的以唑类基团为桥链的芳香胺化合物包括并不限于如下化合物CPM1-CPM50中的任意一种:
本发明还提供了通式I描述的以唑类基团为桥链的芳香胺化合物的制备方法,是在唑类基团的两端引入芳香胺类推电子基团,包括如下步骤:
其中,X1-X3独立地表示为卤素原子,包括溴,碘,氯;X,A,Ar1-Ar4定义与上述通式I中描述相同。
所述的制备方法中,中间体1的合成通过原料卤代物经硝化而制得;中间体2是由中间体1经还原而制备成胺;中间体3是经中间体2卤化而制得,卤化剂采用溴,碘,氯化碘,溴代丁二酰亚胺,碘代丁二酰亚胺,氯代丁二酰亚胺中的任意一种;中间体4是中间体3经酰基化而制备得到;中间体5是中间体4在碱性条件下成环后制得;最后,中间体5与芳香胺在钯催化下经偶联反应制得通式I所示的目标化合物。
本发明的以唑类基团为桥链的芳香胺化合物可以作为有机电子材料应用于制备有机电致发光器件。
一种有机电致发光器件的结构中,光提取层含有通式I表示的以唑类基团为桥链的芳香胺化合物;在本发明的有机电致发光器件中,光提取层的厚度优选在30nm至200nm的范围内,更优选在40nm至120nm的范围内。在本发明的有机电致发光器件中,光提取层可以通过两种或更多种不同的构成材料来制造。
另一种有机电致发光器件的结构中,有机层包含有通式I表示的以唑类基团为桥链的芳香胺化合物。
本发明的有机电致发光器件中,有机层或光提取层的每一层,可以通过真空蒸镀法、分子束蒸镀法、溶于溶剂的浸涂法、旋涂法、棒涂法或者喷墨打印的方式制备,对于金属电极可以使用蒸镀法或者溅射法进行制备。
本发明的以唑类基团为桥链的芳香胺化合物作为有机电子材料还可以应用于有机太阳能电池、有机薄膜晶体管、有机光检测器、有机场效应晶体管、有机集成电路和有机光感受器。
相对于现有的有机电致发光材料,本发明提供的以唑类基团为桥链的芳香胺化合物作为有机电致发光材料具有以下的有益效果:本发明的化合物采用具有优异的成膜性、热稳定性和良好折射率,所述的化合物以的芳香胺基团作为封端材料,并通过含有强吸电子性能的苯并噁唑或苯并噻唑作为桥链连接,从而使制得的有机电子材料具有很高的玻璃化转化温度、良好的成膜性和合适的折射率,适合作为有机电致发光器件结构中的光提取层。本发明的以唑类基团为桥链的芳香胺化合物作为作为光提取材料应用在有机电致发光器件、有机太阳能电池、有机薄膜晶体管、有机光检测器、有机场效应晶体管、有机集成电路和有机光感受器等器件中,可以有效提高器件的发光效率,延长器件的使用寿命。
附图说明
图1为化合物CMP1的DSC图。
图2为化合物CMP41的DSC图。
图3本发明一种优选的有机电致发光器件结构示意图。
具体实施方式
下面,结合附图以及具体实施方式,对本发明做进一步描述,但下述实施例仅为本发明的优选实施例,并非全部。基于实施方式中的实施例,本领域技术人员在没有做出创造性劳动的前提下所获得其它实施例,都属于本发明的保护范围。
实施例1。
化合物CPM1的合成
中间体1-1的合成
将2-溴-9,9-二甲基芴(50.0g,183.03mmol)和冰醋酸(300mL)加入到三口烧瓶中,回流状态下,逐滴滴加浓硝酸(120mL),滴加过程中逐渐有固体析出。滴加完毕后,回流反应2h,冷却,滴加200mL水搅拌,过滤,滤饼用饱和碳酸氢钠溶液洗至中性,烘干,得到58.0g产物,产率99%。1H NMR(400MHz,CDCl3)δ:8.24-8.27(m,1H),7.95(d,J=2.0Hz,1H),7.74-7.80(m,2H),7.56-7.59(m,2H),1.58(s,6H)。
中间体1-2的合成
将中间体1-1(58.0g,182.29mmol),氯化铵(19.5g,364.58mmol)和还原铁粉(30.53g,546.88mmol)加入三口烧瓶中,加入500mL乙醇和150mL去离子水,氮气保护下,加热回流2h。趁热过滤,乙醇洗涤。滤液浓缩至近干,析出大量固体,过滤,滤饼水洗至中性。滤饼用甲苯(200mL)重结晶得到白色固体39g,产率74%。1H NMR(400MHz,CDCl3)δ:7.67-7.69(m,1H),7.52-7.58(m,2H),7.49(d,J=1.6Hz,1H),6.82-6.85(m,1H),6.62(d,J=1.6Hz,1H),5.29(d,J=4.0Hz,2H),1.58(s,6H)。
中间体1-3的合成
将中间体1-2(34.5g,119.71mmol)和DMF(150mL)加入到单口烧瓶中,降温至0-5℃,再将NBS(21.31g,119.71mmol)溶于50mL的DMF中,然后滴加至上述溶液,反应1h,加入200mL无水亚硫酸钠溶液析出固体,过滤。将滤饼用甲苯重结晶得到39g橙色固体。1HNMR(400MHz,CDCl3)δ:7.64(s,1H),7.53-7.59(m,2H),7.42-7.45(m,1H),6.86(s,1H),5.31(s,2H),1.56(s,6H)。
中间体1-4的合成
将中间体1-3(13.1g,35.69mmol)和THF(40mL)加入至单口烧瓶中,再加入Et3N(10.85g,107.22mmol),将对溴苯甲酰氯(11.77g,53.61mmol)溶于THF(40mL)缓慢滴加到上述溶液中,滴加完反应2h。滴加150mL水,过滤。滤饼用甲苯(100mL)重结晶得到16g产物。1HNMR(400MHz,CDCl3)δ:9.78(s,1H),7.90-7.94(m,2H),7.83(s,1H),7.68(d,J=5.6Hz,1H),7.62-7.65(m,3H),7.49-7.53(m,2H),1.57(s,6H)。
中间体1-5的合成
将中间体1-4(15.2g,32.26mmol),碳酸铯(12.7g,38.71mmol),1,10-菲罗啉(1.2g,6.77mmol),CuI(0.75g,3.87mmol),再加入DMF(90mL)和二甲苯(45mL),升温至150℃回流反应2h后,冷却至室温,加入200mL水,过滤得到固体,固体用100mL甲苯重结晶得到产物9.8g。1H NMR(400MHz,CDCl3)δ:8.01-8.05(m,2H),7.87(d,J=6.0Hz,1H),7.74(s,1H),7.60-7.63(m,2H),7.47-7.53(m,3H),1.58(s,6H)。
化合物CPM1的合成
将中间体1-5(1.0g,2.13mmol),二苯胺(0.74g,4.37mmol),叔丁醇钠(0.82g,8.53mmol)和无水甲苯(10mL)加入到三口烧瓶中,氮气保护下加入Pd2(dba)3(0.03g)和三叔丁基膦(0.06g),回流反应3h,冷却,加入稀盐酸调节pH至弱酸性,分液,干燥浓缩,粗产物经柱层析纯化得到0.9g黄色固体,产率65%。1HNMR(400MHz,CDCl3)δ:7.98-8.01(m,2H),7.72(s,1H),7.63(d,J=6.0Hz,1H),7.54(s,1H),7.27-7.35(m,12H),7.16-7.21(m,8H),7.09-7.14(m,3H),6.93(d,J=1.2Hz,1H),1.56(s,6H)。
实施例2。
化合物CPM10的合成
将中间体1-5(1.0g,2.13mmol),N-苯基-1,1’-联苯-4-胺(1.07g,4.36mmol),叔丁醇钠(0.82g,8.53mmol)和无水甲苯(10mL)加入到三口烧瓶中,氮气保护下加入Pd2(dba)3(0.03g)和三叔丁基膦(0.06g),回流反应3h,冷却,加入稀盐酸调节pH至弱酸性,分液,硫酸钠干燥有机相,浓缩,粗产物经柱层析纯化得到1.2g黄色固体,产率70%。1H NMR(400MHz,CDCl3)δ:7.96-7.99(m,2H),7.70(s,1H),7.56-7.64(m,9H),7.51(s,1H),7.29-7.39(m,10H),7.23-7.26(m,2H),7.13-7.19(m,5H),7.08-7.12(m,6H),6.97(d,J=1.6Hz,1H),1.59(s,6H)。
实施例3。
化合物CPM13的合成
合成方法跟CPM1一样,所用原料为中间体1-5(1.0g,2.13mmol),双(4-叔丁苯基)胺(1.23g,4.37mmol),产率70%。1HNMR(400MHz,CDCl3)δ:7.96-7.99(m,2H),7.70(s,1H),7.62(d,J=6.0Hz,1H),7.52(s,1H),7.33-7.36(m,9H),7.13-7.15(m,1H),7.07-7.11(m,2H),7.01-7.04(m,8H),6.98(d,J=1.6Hz,1H),1.59(s,6H),1.37(s,36H)。
实施例4。
化合物CPM17的合成
中间体17-1的合成
将2-溴-9,9-二苯基芴(20.0g,50.34mmol)和冰醋酸(120mL)加入到三口烧瓶中,回流状态下,逐滴滴加浓硝酸(40mL),滴加过程中逐渐有固体析出。滴加完毕后,回流反应2h,冷却后,滴加100mL水搅拌,过滤,滤饼用饱和碳酸氢钠溶液洗至中性,烘干,得到21g产物,产率94%。1H NMR(400MHz,CDCl3)δ:8.21-8.24(m,1H),7.90(d,J=1.6Hz,1H),7.82-7.88(m,2H),7.55(d,J=1.2Hz,1H),7.50-7.53(m,1H),7.26-7.30(m,6H),7.18-7.22(m,4H)。
中间体17-2的合成
将中间体17-1(20.0g,45.22mmol),氯化铵(4.84g,90.48mmol)和还原铁粉(7.58g,135.72mmol)加入三口烧瓶中,加入200mL乙醇和60mL去离子水,氮气保护下,加热回流2h。趁热过滤,乙醇洗涤。滤液浓缩至近干,析出大量固体,过滤,滤饼水洗至中性。滤饼用甲苯(100mL)重结晶得到类白色固体15g,产率80%。1H NMR(400MHz,CDCl3)δ:7.73(d,J=6.0Hz,1H),7.59(d,J=6.0Hz,1H),7.48-7.52(m,2H),7.24-7.31(m,10H),6.82-6.85(m,1H),6.53(d,J=2.0Hz,1H),5.40(d,J=4.0Hz,1H),5.07(d,J=4.4Hz,1H)。
中间体17-3的合成
将中间体17-2(14.0g,33.95mmol)和DMF(70mL)加入到单口烧瓶中,降温至0-5℃,再将NBS(6.10g,34.27mmol)溶于15mL的DMF中,然后滴加至上述溶液,反应0.5h后,加入60mL无水亚硫酸钠溶液淬灭,搅拌析出固体,过滤。将滤饼溶于80mL热甲苯重结晶得到12g类白色固体,产率72%。1HNMR(400MHz,CDCl3)δ:7.78(s,1H),7.75(d,J=6.0Hz,1H),7.58(d,J=1.6Hz,1H),7.50-7.53(m,1H),7.26-7.31(m,6H),7.20-7.24(m,4H),6.66(s,1H),5.32(d,J=2.0Hz,1H),5.24(d,J=2.0Hz,1H)。
中间体17-4的合成
将中间体17-3(11.0g,22.39mmol)和THF(55mL)加入至单口烧瓶中,再加入Et3N(6.8g,67.20mmol),将对溴苯甲酰氯(12.29g,56.00mmol)溶于THF(44mL)缓慢滴加到上述溶液中,滴加完反应2h。滴加110mL水,析出大量固体,过滤。滤饼用甲苯(100mL)重结晶得到11.8g产物,产率78%。1H NMR(400MHz,CDCl3)δ:7.86-7.89(m,2H),7.77(d,J=6.0Hz,1H),7.62-7.66(m,2H),7.50-7.53(m,2H),7.38(d,J=1.6Hz,1H),7.23-7.31(m,6H),7.08-7.11(m,4H)。
中间体17-5的合成
将中间体17-4(11.0g,16.31mmol),碳酸铯(6.4g,19.64mmol),1,10-菲罗啉(0.6g,3.33mmol),CuI(0.31g,1.63mmol),再加入DMF(66mL)和二甲苯(33mL),升温至150℃回流反应2h后,冷却至室温,加入150mL水搅拌,过滤得到固体,固体用100mL甲苯重结晶得到土黄色固体,得到产物5.8g,产率60%。1HNMR(400MHz,CDCl3)δ:8.02-8.06(m,2H),7.81(t,J=3.2Hz,2H),7.65-7.68(m,2H),7.49-7.52(m,2H),7.43-7.45(m,1H),7.25-7.31(m,6H),7.17-7.21(m,4H)。
化合物CPM17的合成
将中间体17-5(1.0g,1.69mmol),二苯胺(0.58g,3.43mmol),叔丁醇钠(0.65g,6.76mmol)和无水甲苯(10mL)加入到三口烧瓶中,氮气保护下加入Pd2(dba)3(0.03g)和三叔丁基膦(0.06g),回流反应4h,加入稀盐酸调节pH至弱酸性,分液,硫酸钠干燥有机相,粗产物经柱层析纯化得到1.0g黄色固体,产率77%。1HNMR(400MHz,CDCl3)δ:7.96-7.99(m,2H),7.74(s,1H),7.65(d,J=5.6Hz,1H),7.37(s,1H),7.22-7.34(m,18H),7.12-7.19(m,13H),7.08-7.12(m,2H),6.88(d,J=1.6Hz,1H)。
实施例5。
化合物CPM41的合成
化合物CPM41的合成跟化合物1的合成一样,所用原料为中间体1-5(1.0g,2.13mmol),4-(苯并[d]恶唑-2-基)-N-苯基苯胺(1.25g,4.37mmol),产率69%。1HNMR(400MHz,CDCl3)δ:7.94-7.98(m,6H),7.70(s,1H),7.61-7.67(m,3H),7.51-7.54(m,3H),7.28-7.40(m,8H),7.22-7.26(m,2H),7.13-7.19(m,5H),7.07-7.11(m,6H),6.98(d,J=1.6Hz,1H),1.59(s,6H)。
化合物的性能测试
化合物的玻璃化转化温度(Tg)测试,用差示扫描量热仪Pyris Diamond(DSC2920)在氮气保护下,以10℃/分钟的加热和冷却速度测试化合物的玻璃化转变温度。
表1材料的玻璃化温度
化合物 | CMP1 | CPM10 | CPM13 | CPM17 | CPM41 |
Tg(℃) | 123.8 | 158.3 | 145.6 | 164.1 | 180.2 |
从表1,图1和图2中可以看出,本发明的化合物的玻璃化转变温度达到123.8-180.2℃,显示出化合物具有良好的热稳定性。
以下通过实施例6至10,以及对比例1,对采用本发明请求保护的电子传输材料制备的有机电致发光器件的具体结构进行举例性说明。
本发明的有机电致发光器件的结构示意图见图3,器件的结构包括:玻璃/阳极(ITO)/空穴注入层(HIL)/空穴传输层(HTL)/电子阻挡层(EBL)/发光层(EML,主体材料BH:蓝色发光材料BD,97:3)/电子传输层(ETL,电子传输材料:8-羟基喹啉锂,50:50)/电子注入层(EIL)/阴极(Mg:Ag,9:1)/光提取层(CPL)。
实施例6。
使用实施例1制备的化合物CMP1制备OLED。
将透明导电ITO玻璃基板110(上面带有阳极120,中国南玻集团股份有限公司)在商用清洗剂中超声处理,在去离子水中冲洗,再依次经过乙醇,丙酮和去离子水洗净,在洁净环境下烘烤至完全除去水分,用紫外光合臭氧清洗,再用氧等离子处理30秒。
把上述带有阳极的玻璃基片至于真空腔内,抽真空,在ITO上面蒸镀HIL(5nm)作为空穴注入层130,蒸镀速率为0.1nm/s。
在空穴注入层上面蒸镀化合物HT,形成80nm厚的空穴传输层140,蒸镀速率为0.1nm/s,
在空虚传输层上面蒸镀EB,形成10nm厚的电子阻挡层150。蒸镀速率为0.1nm/s。
在空穴阻挡层上蒸镀30nm厚的发光层160,其中,BH为主体发光材料,而以3%重量比的BD作为掺杂客体材料,蒸镀速率为0.1nm/s。
在发光层上蒸镀30nm厚的50%重量比ET和50%重量比LiQ作为电子传输层170。蒸镀速率为0.1nm/s,在电子传输层上蒸镀1nm厚的LiQ作为电子注入层180,在电子注入层蒸镀20nm厚掺杂比为9:1的镁银作为器件阴极190,在阴极层之上,蒸镀80nm厚的化合物CMP1作为光取出层。
实施例7-10。
与实施例6的区别仅在于,将光取出层的材料换成本发明的其它化合物,具体的器件结构如下表2。
比较例1
与实施例6的区别仅在于,将光取出层的材料换成化合物1,具体的器件结构如下表2。
表2器件结构
实施例6至10以及比较例1的器件中采用的有机材料的结构式如下:
上述有机材料都是现有的已知材料,由市场采购获得。
以下通过化合物CMP1、CMP10、CMP13、CMP17、CMP41作为光提取层(CPL)材料制备的器件与以化合物1作为光提取层(CPL)材料制备的器件的测试结果比较,对采用本发明化合物制备的器件的效果进行举例性说明。所制备的器件用Photo Research PR655光谱仪测得在10mA/cm2电流密度下的电流效率,具体表3所示。
表3器件性能参数
从表3可以看出,相比比较例1,利用本发明电子材料作为光取出层制备的有机电致发光器件,电流效率从7.23cd/A提升到8.95-9.36cd/A,光取出效果明显,相同的电流密度下,功率提升,可以降低功耗,提升器件的使用寿命。
以上详细描述了本发明的较佳具体实施例。应当理解,本领域的普通技术人员无需创造性劳动就可以根据本发明的构思做出诸多修改和变化。因此,凡本技术领域中技术人员依本发明的构思在现有技术的基础上通过逻辑分析、推理或者有限的实验可以得到的技术方案,皆应在由权利要求书所确定的保护范围内。
Claims (10)
1.一种以唑类基团为桥链的芳香胺化合物,具有如结构式(I)所示的结构通式:
式中,Ar1-Ar4独立地表示为取代或未取代C1-C20的烷基、取代或者未取代的C6-C30的芳基、取代或者未取代的C3-C30的杂芳基、取代或者未取代的C6-C60的三芳香胺基、取代或者未取代的C6-C60的咔唑基;且Ar1和Ar2能通过连接成环;Ar3和Ar4能通过连接成环;
L1和L2独立地表示为单键、苯基、联苯基或萘基;
X独立地表示为CR1R2、O、S、SO2、NR3;其中,R1-R3独立地表示为氢、卤素、取代或未取代的C1-C20的烷基、取代或未取代的C6-C30的芳基、取代或未取代的C3-C30的杂芳基,且R1和R2能通过连接成环。
2.如权利要求1所述的以唑类基团为桥链的芳香胺化合物,其特征在于,Ar1-Ar4独立地表示为苯基、甲苯基、甲氧基苯基、叔丁基苯基、苯腈基、萘基、联苯基、二苯基苯基、萘基苯基、苯基萘基、C6-C30的N-芳基、C1-C4的烷基取代的咔唑基、蒽基、菲基、芘基、苝基、荧蒽基、(9,9-二烷基)芴基、(9,9-二取代或者未取代的芳基)芴基、9,9-螺芴基、C6-C60的三芳香胺基、二苯并噻吩基、二苯并呋喃基、苯并噻唑基、苯并噻吩基、苯并呋喃基、三苯胺基、吡啶基、嘧啶基、噻二唑基、三氮唑基、三氮嗪基或苯并噁唑基。
3.如权利要求1所述的以唑类基团为桥链的芳香胺化合物,其特征在于,R1-R3独立地表示为甲基、乙基、丙基、苯基、萘基或联苯基。
6.一种权利要求1至4中任一项所述的以唑类基团为桥链的芳香胺化合物作为有机电致发光材料的应用。
7.如权利要求6所述的应用,其特征在于,所述的以唑类基团为桥链的芳香胺化合物作为有机电致发光材料应用于有机电致发光器件、有机太阳能电池、有机薄膜晶体管、有机光检测器、有机场效应晶体管、有机集成电路或有机光电感受器。
8.一种有机电致发光器件,包含光提取层和/或有机层,其特征在于,所述的光提取层和/或有机层含有权利要求1至4中任一项所述的以唑类基团为桥链的芳香胺化合物。
9.如权利要求8所述的有机电致发光器件,其特征在于,所述的光提取层和/或有机层通过真空蒸镀法、分子束蒸镀法、溶于溶剂的浸涂法、旋涂法、棒涂法或者喷墨打印中的任一种方法制备。
10.如权利要求8所述的有机电致发光器件,其特征在于,所述的光提取层的厚度为30nm至200nm。
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