Emitting stability of poly（9,9-dialkylfluorene-co-N-butylcarbazole） by solid-state oxidative coupling polymerization

Dihexylfluorene and N-butylcarbazole were copolymerized by solid-state oxidative coupling polymerization in the presence of anhydrous FeCl_3 at room temperature.The solid-state films of the copolymers emitted blue light after heating at 150℃in air for 24 h,no red-shifted emission was observed by fluorescence spectroscopy.     

Al_2（SO_4）_3／γ－Al_2O_3单层分散状态及其对丁烯齐聚反应活性的

用ＸＲＤ、ＴＧ、热重氨吸附法等手段，测定了Ａｌ_２（ＳＯ_４）_３／γ－Ａｌ_２Ｏ_３中单层分散相与Ａｌ_２（ＳＯ_４）_３担载量之间的关系，测定了表面单层最大分散量一阈值。其与用密置单层模型计算所得值接近，这为Ａｌ_２（ＳＯ_４）_３在γ－Ａｌ_２Ｏ_３上单层分散行为提供了证据，且将该催化剂的表面行为与其对丁烯齐聚反应活性进行了关联。     

痕量芴、苊、蒽和(艹北)的同时偏振-同步荧光分析

本文建立了痕量芴、苊、蒽和(艹北)的同时偏振-同步荧光分析法.该法能有效地抑制同步扫描过程中散射光的影响,从而提高测定的灵敏度.芴、苊、蒽和(艹北)的检测限分别为(ng/mL):1.1、10.0、1.8、0.26,相对标准偏差不大于4.2％.     

芴与噻吩发光共聚物的合成及其电致发光性能

采用Suzuki偶合方法合成出了一系列新型的 9,9 二辛基芴 (DOF)和噻吩 (Th)的共聚物 .其中 ,DOF与Th的投料比 (摩尔比 )分别为 95∶5 (PTF5 )、90∶1 0 (PTF1 0 )、85∶1 5 (PTF1 5 )、70∶3 0 (PTF3 0 )、5 0∶5 0 (PTF5 0 ) .所有的聚合物均可溶于常用的有机溶剂 ,如THF,CHCl3等 ,其分子量在 60 0 0～ 5 3 0 0 0之间 .当在聚芴主链中引入噻吩后 ,其发光波长发生了红移 ,最大发光波长由PTF5时的 490nm红移到PTF5 0时的 5 41nm .随着聚芴主链中噻吩含量的增加 ,最大电致发光和光致发光效率都逐渐降低 由这些聚合物所制得的器件 ,最大电致发光效率为PTF5和PTF1 0的 0 45 %.由此表明 ,在聚芴主链中引入少量的低带隙单体噻吩可以调节聚芴的发光颜色及发光效率     

一种可光交联聚芴蓝光材料的合成与表征

有机电致发光器件代表了未来显示技术的发展趋势,已引起学术界、企业界和政府部门的广泛关注[1~4].目前,全色显示是有机电致发光器件商业化的控制因素之一,成为当前研究的一项热点.利用多层器件结构获得的白色电致发光器件,可以有效地提高平板显示器的分辨率.与有机小分子相比,     

化学除氧技术在环糊精诱导室温磷光法中的应用：（Ⅱ）2—溴乙醇作？…

以２－溴乙醇作重原子微扰剂，用亚硫酸钠化学除氧技术，建立了β－环糊精诱导室温磷光法（β－ＣＤ－ＲＴＰ）测定痕量二氢苊，芴，菲，７，８－苯并喹啉的方法。该法除氧简便快速，体系澄清。     

一维链状超分子化合物[Zn(dafo)2(H2O)2](NO3)2(dafo=4，5-二氮芴-9-酮)的合成、表征和晶体结构

A novel one-dimensional chain complex [Zn(dafo)₂(H₂O)₂](NO₃)₂ was synthesized. It has been characterized by IR, UV, TGA, Elemental analysis and X-ray diffraction analysis. The crystal belongs to triclinic system, P1 space group. The Crystallographic data are: a= 0.702 7(14) nm, b= 0.828 95(17) nm, c= 10.225(2) nm, α = 95.02(3)°, β = 91.45(3)°, γ = 99.85(3)°. The crystal structure data indicate that the Zn(Ⅱ) ion was coordinated with the four nitrogen atoms of two dafo and two oxygen atoms of two coordination water molecules, respectively. The complex has a one-dimensional chain structure, which is formed by hydrogen bonds.     

Dealuminated ZSM—5 Zeolite Catalyst for Ethylene Oligomerization to Liquid Fuels

Ethylene oligomerization using ZSM-5 zeolite was investigated to study the role of Broensted acid sites in the formation of higher hydrocarbons,The oligomeriztion of olefins,dependent on the acidity of ZSM-5 zeolite ,is an important step in the conversion of natural gas to liquied fuels,The framework Si/Al ratio reflects the number of potential acid sites and the acid strength of the ZSM-5 catalyst,ZSM-5 with the mole ratio SiO2/Al2O3 equal to 30 was dealuminated for different periods of time according to the acidic ion-exchange method to produce ZSM-5 with various Si/Al ratios,The FT-IR analysis revealed that the integrated framework aluminum band,non-framework aluminum band,and silanol groups areas of the ZSM-5 zeolites decreased after being dealuminated,The performanc of the dealuminated zeolite was tested for ethylene oligomerization.The results demonstrated that the dealumination of ZSM-5 led to higher ethylene conversion,but the gasoline selectivity was reduced compared to the performance of a ZSM-5 zeolite ,The characterization results revealed the amount of aluminum in the zeolitic framework,the crystallinity of the ZSM-5 zeolite,and the Si/Al ration affected the formation of Broensted acid sites,The number of the Broensted acid sites on the catalyst active sites is important in the olefin conversion to liquied hydrocarbons.     

聚芴类电致发光材料的研究进展

聚芴衍生物是最有发展潜力的电致发光材料之一。本文从聚芴衍生物的结构出发,概述了通过化学方法对聚合物的性能进行优化的最新研究进展,着重于发光效率和发光稳定性、发光颜色、加工性能的改善方法。     

9,9-二己基芴基四乙炔基聚炔铂的合成及发光性质

Soluble platinum(Ⅱ)polyyne polymers trans-{Pt-[P(C_4H_8N)_3]_2(C≡C)_2R(C≡C)_(2-)}_n and trans-{Pt-[P(C_4-H_3O)_3]_2(C≡C)_2R(C≡C)_(2-)}_n(R=9,9-dihexylfluorene-2,7-diyl)have been prepared in good yields by CuI-catalyzedpolymerization involving the dehydrohalogenating coupling of trans-{PtCl_2[P(C_4H_8N)_3]_2} and trans-{PtCl_2[P-(C_4H_3O)_3]_2} with H(C≡C)_2R(C≡C)_2H,respectively.We report the optical spectroscopy of these polyplatinaynes.The influence of the heavy metal atom in these metal alkynyl systems on the intersystem crossing rate and the spa-tial extent of lowest singlet and triplet excitons was systematically characterized.Our investigations indicate that theorganic triplet emissions can be harvested by the heavy-atom effect which enables efficient intersystem crossingfrom the S_1 singlet excited state to the T_1 triplet excited state.