基于蒽衍生物的蓝色发光材料性能、模拟及OLED器件研究

有机电致发光器件也被称为OLED,在近几十年之内吸引了众多科研人员的目光。OLED元器件具有诸多优势,比如主动发光和超薄、低能耗、视角范围广等优势。在目前市场上已经开始对这种材料大规模的生产。逐渐商业化生产的OLED器件仍旧需要从电致发光材料的设计、器件结构的优化等几个方面来降低生产的成本。蒽衍生物有比较高的荧光量子和很好的稳定性,还有诸多优势,可以运用在有机电致发光器件的生产中。     

蒽衍生物蓝光材料的合成与光谱分析

采用还原4-甲苯基锂和β-萘基锂与2-氯蒽醌的加成物制备了有机电致蓝光材料2-腈基-9,10-二(4-甲苯基)蒽和2-腈基-9,10-二(β-萘基)蒽(简称BA和NA)。通过红外、核磁共振、质谱、元素分析对其结构进行了表征。利用紫外可见吸收光谱、荧光光谱研究它们的发光性能。紫外光谱表明BA和NA都有2个吸光带,其中BA的E带波长为272nm,B带有3个吸收峰,其波长分别为369nm、392nm、413nm;NA的E带波长270nm,B带的3个吸收波长分别为372nm、393nm、413nm。采用413nm的激发光技法,BA和NA的荧光发射峰波长分别为437nm,442nm,半峰宽为56nm和57nm,有很好的蓝光色纯度。     

蒽衍生物类有机蓝光材料的研究进展

作为新兴平板显示技术的有机电致发光器件具有驱动压低、响应速度快、发光效率高、发光亮度大、发光视角宽、重量轻、厚度薄、可柔性卷曲、使用范围宽等优点。蒽是具有刚性平面结构和较大共轭平面的多环芳烃化合物,由于具有成膜性好、热稳定性高、化学修饰强、适当的载流子传输性、较好的光电性能等特点,已经发展成为一类重要的有机蓝光材料。本文综述了蒽基有机蓝光材料的研究进展,并对其未来发展趋势进行了展望。     

有机电致发光器件中的新型双极主体材料的合成及应用

设计并合成了一种由咔唑和噁二唑基团构成的,具有双极载流子传导特性的新型主体材料C1PBD。通过对C1PBD的光物理和电化学性能进行研究,证明这种新型的双极主体材料可以用作为蓝色荧光器件的主体材料.利用传统蓝色荧光掺杂材料TBPe,制备了C1PBD作为主体材料的器件,并对其性能进行了表征,器件开启电压约为3.2 V,最大电流效率达到2.26 cd/A,器件表现出稳定的蓝色发光,CIE值稳定在(0.14,0.14),展现了C1PBD作为主体材料的良好性能.     

蓝光材料2-叔丁基-9,10-二（9,9-二正丙基芴基）蒽的合成与性能表征

本文设计并合成了一种新型蒽衍生物蓝光材料2-叔丁基-9,10-二（9,9-二正丙基芴基）蒽.化合物中引入的柔性烷基链有效抑制了分子间的相互作用,使该化合物不易结晶,同时提高了化合物在有机溶剂中的溶解度.通过量子力学方法计算发现,化合物具有顺反两种稳定构型,分子的平面性差,能减弱分子间相互作用.化合物在二氯甲烷溶液中的最大荧光发射峰在443 nm,在环己烷溶液中测得荧光量子效率为0.78,固态薄膜的最大发射峰波长相对溶液有少量红移（450 nm）.热失重和差热分析结果表明,该化合物具有较高的热稳定性,分解温度和玻璃化转变温度分别为365℃和126℃.     

发光有机器件用新型荧光掺杂材料的合成及表征

对具有代表性的绿色磷光发光掺杂材料Ir(ppy)3[三(2-苯基吡啶)合铱]进行了改性,在其配位体处导入了含有较大空间位阻的芳香族置换基团;设计开发了具有空穴/电子传导部位的EL(有机电致发光)共聚物,并分别对改性后的磷光掺杂材料[如Ir(Bu-ppy)3(三丁基吡啶合铱配合物)、Ir(Cz-ppy)3(三咔唑吡啶合铱配合物)等]与导电高分子掺杂后制成的OLED(有机发光二极管)的性能进行了分析。研究结果表明:上述芳香族置换基团能减轻浓度消光效应,提高原有掺杂材料的发光效率,并且提高了含该掺杂体的高分子材料在有机溶剂中的溶解性;含Bu-ppy配位结构的磷光掺杂材料比含Cz-ppy配位结构的掺杂材料具有更高的器件效率。     

新型手性胺类衍生物的合成

胺类化合物作为亲核试剂,与手性5-(S)-5-(L-孟氧基)-3,4-二溴-2(5H)呋喃酮通过不对称Michael加成-消除反应得到4个含手性中心的胺类衍生物,产率80%～93%。所有化合物均经IR、1HNMR、13CNMR、HRMS得到确证,为室温下方便地制备含多手性中心的胺类衍生物提供了一条可能的新途径。     

新型电致发光材料1，5—萘二胺衍生物的合成和性质研究

合成了一种新型的有机电致发光材料：N,N‘－二苯基－N,N‘－二（1－萘基）－1,5－萘二胺（NPN）,测定了其吸收谱和荧光发射光谱。该材料具有很好的热稳定性,DSC测定其玻璃化温度（Tg）高达127℃,循环伏安法（CV）测定其电离热（Ip）为5.30eV,可望用作有机电致发光空穴传或蓝色发光材料。     

新型均三嗪咔唑类蓝光电致发光材料的合成与性能探究

在新时期环境下,越来越多的科技产品得到了开发和使用,其中在二极管的研究中,有机发光材料逐渐得到了行业内的广泛关注和研究,并推动了有机发光类型二极管的发展。通过不断深入的研究,诸多新型发光材料不断产生,本文就主要对一种新型均三嗪咔唑类蓝光电致发光材料合成实施分析,并对其材料性能的提升进行研究,希望对相似材料的研究提供参考。     

新型萘基环氧树脂的合成与表征

本研究以１－萘酚为原料,在催化剂的作用下合成了萘基环氧树脂（ＮＰＥＲ）,并对其特征性质进行了测试。采用红外光谱法和核磁共振氢谱法对ＮＰＥＲ的结构进行了剖析,推测出了ＮＰＥＲ的合成机理。     

Fabrication of red, green, and blue organic light-emitting diodes using m-MTDATA as a common hole-injection layer

Organic light-emitting diodes (OLEDs) of metal-semiconductor-metal (MSM) structure have been fabricated by using m-MTDATA [4,4′,4′’-tris (3-methylphenylphenylamino) triphenylamine] as a hole-injection layer (HIL). The m-MTDATA is shown to be an effective hole-injecting material for the OLED, in that the insertion of m-MTDATA greatly reduces the roughness of anode surface, lowers the turn-on voltage, and increases the luminous efficiency. Red, green and blue OLEDs were fabricated, and their color coordinates in CIE chromaticity were found to be (0.600, 0.389), (0.240, 0.525) and (0.171, 0.171), respectively. The luminous efficiencies of the fabricated OLEDs were 1.4 lm/W at 106 cd/m² for red, 1.4 lm/W at 100 cd/m² for green, and 2.0 lm/W at 104 cd/m² for blue.     

Synthesis and electroluminescence property of new hexaphenylbenzene derivatives including amine group for blue emitters

Three new blue-emitting compounds of 5P-VA, 5P-VTPA, and 5P-DVTPA for organic light-emitting diode (OLED) based on hexaphenylbenzene moiety were demonstrated. Physical properties by the change of the substitution groups of the synthesized materials were systematically examined. Photoluminescence spectrum of the synthesized materials showed maximum emitting wavelengths of about 400 to 447 nm in solution state and 451 to 461 nm in film state, indicating deep blue emission color. OLED devices were fabricated by the synthesized compounds using vacuum deposit process as an emitting layer. The device structure was ITO/2-TNATA 60 nm/ NPB 15 nm/ EML 35 nm/ TPBi 20 nm/ LiF 1 nm/ Al 200 nm. External quantum efficiencies and CIE values of 5P-VA, 5P-VTPA, and 5P-DVTPA were 1.89%, 3.59%, 3.34%, and (0.154, 0.196), (0.150, 0.076), (0.148, 0.120), respectively. 5P-VTPA and 5P-DVTPA exhibited superior highly blue quality and thermal property such as high T_d of 448°C and 449°C.     

Synthesis and characterization of new arylamine chitosan derivatives

The synthesis of new chitosan derivatives and their complete characterization by elemental analysis, Fourier transform infrared, thermogravimetric analysis, and cross‐polarity/magic‐angle‐spinning ¹³C NMR is described. A chitosan that was 96.5% deacetylated and had a viscosimetric molecular weight of 131,000 g/mol was prepared. N‐(3,5‐Diethylaminobenzoyl) chitosan with a degree of substitution of 29% and N‐(4‐ethylaminobenzoyl) chitosan with a degree of substitution of 60% were obtained. Such derivatives could be used as metal‐chelating polymers, as flocculants, and in biomedical applications because of the aryl amine moieties in their structure. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91: 807–812, 2004     

一种新型喹啉类衍生物的合成与结构表征

以3,4,5-三甲氧基苯甲醛、苯并环己酮和丙二腈为原料,在醋酸铵的存在下,通过Knoevenagel反应和Mannich反应的串联反应合成了一种新型喹啉类衍生物,采用IR,MS1HNMR,13CNMR对该衍生物进行了表征,并通过X-单晶衍射获得其晶体结构.     

Synthesis and properties of various PPV derivatives with phenyl substituents

New electroluminescent polymers with various phenyl groups, poly[2-dimethyl(octyl)silyl-5-(4-(dimethyl(octyl)silyl)phenyl)-1,4-phenylenevinylene] (P1), poly[2,5-bis(4-(dimethyl(octyl)silyl)phenyl)-1,4-phenylenevinylene] (P2), poly[2,5-bis(9,9-dihexylfluorenyl)-1,4-phenylenevinylene] (P3), and poly[2,5-bis(4-(4-(2-etylhexyloxy)phenyl)phenyl)-1,4-phenylenevinylene] (P4), have been synthesized by the Gilch polymerization. The maximum absorption peaks of P1-P4 appeared at 388-423 nm in THF solution, and are red-shifted to 404-425 nm in solid thin film. The photoluminescence (PL) emission spectra of P1-P4 show a maximum peak at 482-503 nm in THF solution and at 521-549 nm as the solid film state. The emission spectra in the solid film state are more red-shifted over 40 nm, and the full width at half maximum (fwhm) was 30 nm greater than the solution conditions. The polymer light-emitting diodes (PLEDs) with the configuration of ITO/PEDOT/polymer/Al emitted light with maximum peaks at around 517-546 nm. The various phenyl substituents, with intermolecular interactions in the solid film state, can introduce the color tuning and device performance enhancement of the conjugated polymer as an emissive layer in PLED.     

苯薄荷醇衍生物和萘薄荷醇衍生物的合成与表征

主要研究二环[4.2.0]辛酮中间体薄荷醇衍生物的合成工艺.以(-)-1 R,2S,5R-8-苯薄荷醇和(-)-1R,2S,5R -8-萘薄荷醇为原料,通过酯化反应合成目标化合物,产率分别为58.7%、92%.其结构经 1HNMR、13CNMR进行了表征,并对标题化合物的构象稳定性和晶体结构进行了研究.     

双噁唑啉类衍生物的合成及表征

对苯二甲酸二甲酯肼解制得对苯二甲酰肼,后者与不同的芳香醛缩合得到对苯二甲酰腙,然后与乙酸酐环合,合成出9个双唑啉衍生物,其结构通过IR、1HNMR、MS及元素分析确证并对其波谱学特征予以讨论。     

川芎嗪哌嗪衍生物的合成与表征

以川芎嗪三水合物为原料,经氧化、酰化、水解、卤代和烃化反应合成了4个川芎嗪哌嗪衍生物,通过红外光谱、核磁共振氢谱和质谱对其结构进行了表征。     

席夫碱-取代水杨醛缩氨基吡啶衍生物的合成与表征

以水杨醛与2-氨基吡啶为原料设计合成了7种席夫碱，通过元素分析、红外光谱和核磁共振氢谱分析，确定了化合物的结构，初步试验表明6种化合物具有热致变色性质。     

Synthesis and characterization of substituted polynorbornene derivatives

This paper describes palladium (II) catalyst based synthesis and detailed characterization of vinyl-type polynorbornenes (PNBs) with bulky phenyl, adamantane, or norbornane substituents linked by ester, ether, or alkyl bridges. The structure-property relationships of the substituted PNBs were investigated concerning the thermal stability, glass transition temperature, wide-angle X-ray scattering (WAXS) patterns, mechanical properties, and dielectric characteristics. PNBs with phenyl substituted pendant groups improved the solubility and film forming properties due to aromatic-aromatic interactions. The substituted PNBs exhibited good thermal and thermo-mechanical properties with thermal decomposition temperature (T_d,5%) above 300 °C and glass transition temperature in the range of 134-325 °C. WAXS studies revealed the presence of local nano-scale order in the noncrystalline state, especially in ester bridged adamantane and norbornane substituted polymers, probably due to the steric packing requirements of bulky side groups coupled with dipolar interactions. Nanoindentation results showed high modulus (6.5-7.9 GPa) and hardness (0.11-0.38 GPa) for PNBs with diester adamantane and norbornane substituted polymers. Excellent dielectric properties with a dielectric constant (?) of 2.5 and a dielectric loss tangent (tan δ) of 0.0005 were measured for poly [2-(4-phenylbutyl)-5-norbornene] at 1 GHz, rendering it very attractive for interconnect dielectric films in high-frequency electronic devices.