两种芳胺基团修饰的螺二芴衍生物在有机电致发光材料及荧光探针中的应用

通过在螺二芴上引入芳胺基团制备出两种全新的螺二芴衍生物SPF-1和SPF-2.化合物SPF-1能够通过荧光强度检测有机溶剂中的含水量.其中,SPF-1在1,4-二氧六环中对水的检测限达到0.018％,在四氢呋喃（THF）中对水的检测限达到0.049％,结果优于大多数文献的报道.另外,SPF-1和SPF-2都可用作有机电致发光（EL）器件的发射层材料.SPF-1制备的器件在506 nm附近有强的发射峰,色度坐标为（0.24,0.48）;SPF-2制备的器件在471 nm和502 nm处有较强发射,色度坐标为（0.31,0.54）.两个器件都具有低开启电压、高热稳定性等优异性能.其中SPF-1的最大亮度、最大电流效率和最大功率效率分别为1 653 cd·m^-2,2.55 cd·A^-1和1.23 lm·W^-1,SPF-2的最大亮度、最大电流效率和最大功率效率为是1 660 cd·m^-2,2.1 cd·A^-1和1.28 lm·W^-1.     

关于一类高阶齐次线性微分方程解的增长性

 研究了高阶线性齐次微分方程
f ^(k)+A_k－1(z)P_k－1(e ^z)f ^′ +…+A₁(z)P₁(e^z)f ^′ +A₀(z)P₀(e^z)f=0
解的增长性,其中A_j(z)≠0(j=0,1,…,k－1)是整函数,P_j(e^z)(j=0,1,…,k－1)是e^z的非常数多项式,它们的常数项都为零,且次数不相等。证明了该微分方程的每一个非零解有无穷级。     

基于蓝色热活化延迟荧光材料制作的用于固态照明的高效有机发光器件

文章讨论了采用真空热蒸镀的方法制备了适用于夜间照明的有机发光器件.器件选用热活化延迟荧光材料DPEPO作为发光层主体材料,热活化延迟荧光材料DMAC-DPS作为蓝光掺杂剂,PO-01作为橙光发射的磷光掺杂剂.器件结构为ITO/TCTA(20 nm)/DPEPO:x%DMAC-DPS:0.6%PO-01(15 nm)/TAZ(20 nm)/LiF(0.8 nm)/Al(100 nm).通过改变DMAC-DPS的掺杂浓度来研究器件性能的变化.实验结果表明:当x=20时,器件的最大电流效率可达26.19 cd/A,最大功率效率可达7.47 lm/W,最大亮度可达4 619 cd/m~2,器件的发光效率较高.     

一个单核三价铬配合物的晶体结构、发光性质及热稳定性

我们重新合成了曾经报道过的反式K[Cr(C₂O₄)_2·(H₂O)₂]_2·3H₂O三价铬配合物, 并借助先进的单晶衍射仪和更先进的解析手段得到了该配合物更加精确的结构模型,该配合物属于单斜晶系,P2/n（No. 13）空间群,晶胞相关参数为：a = 7.8827 (4) Å,b = 5.7296(3) Å,c = 13.6447(7) Å,β= 103.506(5)°,Z = 2,Dc =1.980 Mg/m³,V = 599.22(5) ų。热重测试结果显示该配合物在357 K以前是稳定的,在410 nm最有效的紫外光光源的激发下,配合物在610 nm处有一个尖锐的发射峰。     

基于FirPic的蓝色有机电致磷光器件

利用真空蒸镀的方法,制备了结构为ITO/NPB(20 nm)/MCP(3 nm)/MCP:Firpic(z%,x nm)/TPBi(10nm)/Alq3(30 nm)/Cs2CO3:Ag2O(2 nm,20%)/Al(100 nm)的器件.研究了不同掺杂浓度(z=5,8,10和12)和不同厚度(x=5,10,15,20和25)对器件性能的影响.首先确定MCP:Firpic层的厚度为5 nm,调节掺杂浓度.结果表明当掺杂浓度为10%时,器件的效率和亮度都为最大.驱动电压为8 V时,最大电流效率为6.996 cd/A;驱动电压为15 V时,最大亮度为10 064 cd/m2.在10%的掺杂浓度下,调节MCP:Firpic层的厚度.当厚度为20 nm时,器件的性能较好.驱动电压为13 V时,电流密度为2.248 mA/cm2,效率为10.35 cd/A;驱动电压为21 V时,电流密度为304.16 mA/cm2,亮度为21 950 cd/m2.     

Expression, purification and characterization of the soluble CuA domain of cytochrome c oxidase ofParacoccus versutus

The key subunit Ⅱ of cytochrome c oxidase (CcO) contains a soluble binuclear copper center (Cu_A) domain. The Cu_A domain of Paracoccus versutus was cloned, expressed, purified and characterized. The gene encoding the Cu_A domain in pET11d vector was expressed in E. coli BL21 (DE3). The results showed that the Cu_A domain was expressed mostly in inclusion bodies and the Cu_A domain protein synthesized in E. coli cells represents approximately 10 percent of the total cellular proteins. Dissolved in urea, dialyzed and recombined with Cu⁺/Cu²⁺ and purified by the Q-sepharose fast flow anion-exchange column and Sephadex G-75 gel filtration column, the soluble purple-colored protein, which shows a single band in electrophoresis, was obtained. The UV-visible absorption spectrum of Cu_A domain showed that there are intense band at 478 nm and a shoulder peak at 530 nm, and two weak bands at 360 and 806 nm respectively, which can be assigned to the charge transfer and the interactions of obitals of Cu—S and Cu——Cu in the mixed-valence binuclear metal center (Cu₂S₂R₂). The far-UV CD spectrum indicated that this domain is predominantly in β-sheet structure. The fluorescence spectra showed that its maximal excitation wavelength and maximal emission wavelength are at 280 and 345 nm, respectively.     

N,N′-双水杨醛缩二氨基乙醚的合成和晶体结构

合成了一种新的西佛碱配体N,N''双水杨醛缩二氨基乙醚,并采用x射线单晶衍射法测定了它的晶体结构。该晶体属正交晶系空间群P_bcn,a=5.667(2)Å,b=9.192(3)Å,c=31.829(11)Å,v=1658.2(7)ų,分子式为C₁₈H₂₀N₂O₃,Mr=312.36,Z=4,D_C=1.251g·cm^-3,晶体结构测定和UV,IR谱均表明分子内形成氢键。在甲醇溶液中有一个荧光发射带,λ_max=443nm。     

利用双发光层结构提高N-BDAVBi掺杂器件的效率

制备了基于N-BDAVBi的高效率双发光层蓝色有机电致发光器件(OLED),器件中将蓝色荧光染料NBDAVBi作为客体发光材料分别掺入主体材料TCTA和TPBi中,器件结构为ITO/m-MTDATA(40 nm)/NPB(10nm)/TCTA:N-BDAVBi(15 nm)/TPBi:N-BDAVBi(15 nm)/TPBi(30 nm)/LiF(0.6 nm)/Al(150 nm),最大电流效率达到8.44 cd/A,CIE色坐标为(0.176,0.314),并且在12 V的电压下,亮度最大达到11 860 cd/m2,分别是单发光层结构器件的1.85倍和1.2倍.器件性能提高主要归因于双发光层扩大了载流子复合区域,主客体间的Forster能量转移.     

A novel differential velocity modulation laser spectroscopy

Experimental investigation of a novel differential velocity modulation laser spectroscopy is reported and demonstrated with the spectra of N⁺₂A²Π_m-X₁Σ⁺E Meinel system. The S/N ratio excesses 500︰1, about 60 times higher than that with the traditional non-differential technique. With this technique, we obtained the high-resolution electronic absorption spectra of A2Π-X²Σ⁺(1, 0) vibration-al band of CS⁺ for the first time. It is confirmed that this technique will be a powerful method and receive wide application in studies of new molecular ions.     

非连通图(K1∨(P(1)n∪ P(2)n)) ∪ P(3)n及(K1∨(P(1)n∪ P(2)n)) ∪ P(3)n∪ St(n)的优美性

 给出了非连通图(K₁∨(P⁽¹⁾_n∪ P⁽²⁾_n)) ∪ P⁽³⁾_n和(K₁∨(P⁽¹⁾_n∪ P⁽²⁾_n)) ∪ P⁽³⁾_n∪ St(n),且对其优美性进行了研究。证明了如下结论：设 n 为任意正整数,则当n≥4时,非连通图 (K₁∨(P⁽¹⁾_n∪ P⁽²⁾_n)) ∪ P⁽³⁾_n和(K₁∨(P⁽¹⁾_n∪ P⁽²⁾_n)) ∪ P⁽³⁾_n∪ St(n)均是优美图;其中,Pn 是 n 个顶点的路,Kn 是n个顶点的完全图, St(n) 是 n+1 个顶点的星形树,G₁ ∨ G₂ 是图 G1 与 G2 的联图。     

Fabrication and spectra characteristics of high efficiency white organic light-emitting diodes with single emitting layer

High-efficiency white organic light-emitting devices with single emitting layer are demonstrated. N,N‘-diphenyI-N,N‘-bis(1,1‘-biphenyl)-4,4‘-diamine (NPB) is used as hole transport layer, while 4,7-diphenyl-l,10-phenan-throline (BPhen) as electron transport layer and 9,10-di-(2-naphthyl)-2-terbutyl-anthracene (TADN) doped with the fluorescent dye 4-(dicyanomethylene)-2-t-buty1-6-(1,1,7,7-tetramethyljulolidyl-9-enyl) (DCJTB) as single emissive layer. The effects of performance by the concentration of DCJTB and the thickness of emissive layer are studied. The device with a structure of indium tin oxide/NPB (50 nm)/TADN: 0.2% DCJTB (15 nm)/BPhen (40 nm)/Mg: Ag shows a maximum brightness of 11400 cd/m^2, a peak current efficiency of 5.6 cd/A and power efficiency of 4.1 Ira/W, while the low turn-on voltage of 3.1 V and the stability of the Commission International De L‘Eclairage coordinate. The spectra through color filter of the device are also studied.     

Si衬底掺杂浓度对InGaN/Si异质单结太阳电池性能的影响

【目的】研究p-Si衬底掺杂浓度对InGaN/Si异质单结太阳电池性能的影响,为制备高效太阳电池提供理论基础。【方法】将器件的n-InGaN掺杂浓度固定为10~(16 )cm~(-3),在改变p-Si衬底掺杂浓度N_A的情况下,采用一维光电子和微电子器件结构分析模拟软件(AMPS-1D)对InGaN/Si异质单结太阳电池器件的各项性能参数进行模拟。【结果】随着掺杂浓度N_A的升高,电池的电流密度J_(SC)和填充因子FF随之升高,当到达一定高的掺杂浓度范围时(N_A5.00×10~(17)cm~(-3)),J_(SC)基本保持不变,约为28.12mA/cm~2,FF保持在0.85左右且变化不大。开路电压V_(OC)和光电转换效率E_(ff)与掺杂浓度的大小呈正相关关系,随着N_A的增大,V_(OC)、E_(ff)缓慢增大。【结论】高掺杂浓度下的太阳电池具有较好的光电转换效率。低掺杂浓度的太阳电池光电转换效率较低,这是因为其对应的尖峰势垒高度和宽度均较大,影响了光生载流子的输运。     

Investigation of the effects of MoO_3 buffer layer on charge carrier injection and extraction by capacitance–voltage measurement

The effects of MoO3thin buffer layer on charge carrier injection and extraction in inverted configuration ITO/ZnO/MEH-PPV(poly(2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene))/MoO3(0,5 nm)/Ag hybrid solar cells are investigated by capacitance–voltage measurement under dark and light illumination conditions.The efficiency of charge carrier injection and extraction is enhanced by inserting 5 nm MoO3thin layer,resulting in better device performances.Charge carrier transport of the whole device is improved and the interface energy barrier is reduced by inserting 5 nm MoO3thin buffer layer.The device fill factor is increased from 54.1%to 57.5%after modifying 5 nm MoO3.Simulations and experimental results consistently show that in the forward voltage under dark,the device with the 5 nm MoO3thin layer modification generates larger value of capacitance than the device without MoO3layer.While under illumination,the device with the 5 nm MoO3layer generates smaller value of capacitance than the device without the 5 nm MoO3layer in the bias region of reverse and before the peak position of maximum capacitance(VCmax).The underlying mechanism of the MoO3anode buffer layer on device current density–voltage characteristics is discussed.     

Pure and stable white organic light-emitting device with an ultra-thin layer

Due to high brightness, low viewing angle, low driving voltage and short response time, organic light-emitting display is appraised as one of the most promising flat displays in the near future. Full-color technology is the bottle neck for industrializati…     

超声波下酸化碘酸钾和亚硫酸钠反应的反应速率研究

分别测定在有超声波作用和在无超声波作用条件下 ,酸化碘酸钾 (KIO3 )和亚硫酸钠 (Na2 SO3 )反应的反应速率方程式及活化能 ,从而研究该反应的机理以及超声波在该反应中的作用 ,并确定反应的最佳条件。实验得出 ,超声波对该反应有一定的促进作用 ,但是这种促进作用只提高反应的速率常数和降低反应的活化能 ,并没有改变反应机理。在超声波功率为 30 0W时 ,反应的速率方程表示式为 :v =k·c1 0 9(KIO3 ) ·c1 0 0 (Na2 SO3 )·c1 0 8(H+ ) ,其中 :k =95 0 (mol-1·L) 2 ·s-1,活化能为 17 35kJ·mol-1。实验还得出 ,在温度为2 98K时 ,当KIO3 与Na2 SO3 的初始浓度比为 2∶5 ,H+ 的初始浓度为 0 0 4 2 8mol·L-1,超声功率为 30 0W时 ,反应速率为最快 ,即v =4 31× 10 -4mol·L-1·s-1)。     

氢还原竖炉的模拟分析

利用一组物料、热量守衡式及其他有关约束关系,建立了氢还原竖炉模拟模型,可定量考察消耗量、生成量和氮气、CO兑入成分、DRI金属化率、入炉煤气温度等的关系。模拟结果表明:兑入CO可使入炉煤气量从纯氢还原的1 650N·m3左右下降到1 200N·m3左右;当CO和H2的体积之比V(CO)/V(H2)约为0.6时,氮气兑入量约为0,竖炉能量利用最佳;当V(CO)/V(H2)体积比为0.3时,最佳氮气兑入成分约为11%;纯氢还原最佳氮气兑入成分约为25%;兑入氮气可以减少入炉氢气的量,但不能减少入炉气体的总量。对氢还原竖炉模拟结果可为其工艺设计、操作和节能等提供参考信息。     

SBDR显色剂固相萃取光度法测烟草中的铅

 研究了对磺酸基苯基亚甲基若丹宁(SBDR)与铅的显色反应,在pH为4.0的HAc-NaAc缓冲介质中,吐温-60存在下,该络合物可被WatersSep-Pak-C18固相萃取小柱萃取,小柱上富集的络合物用无水乙醇洗脱后在乙醇介质中,体系λ_max=560nm,ε=1.12×10⁵L·mol^-1·cm^-1.可用分光光度法测定,铅含量在0~6μg/50mL内符合比尔定律,方法用于烟草中铅含量的测定,结果令人满意.