Sm3+掺杂稀土硼酸盐玻璃的光谱参数计算和荧光光谱分析

制备了具有高效可见荧光发射的Sm3 掺杂稀土硼酸盐(LBLB)玻璃,对玻璃的吸收和荧光光谱展开了测试与分析.根据Judd-Ofelt理论对吸收光谱进行了拟合,求得Sm3 离子的晶场调节参数Ωt=(2,4,6)分别为6.81×10-20,4.43×10-20和2.58×10-20 cm2,并进一步计算出各能级跃迁的谱线强度、自发辐射跃迁概率、辐射寿命和荧光分支比等光谱参数.紫外光激发下,Sm3 掺杂LBLB玻璃发出明亮的橙红色光.激发光谱表明,氩离子激光器是Sm3 掺杂LBLB玻璃有效的激发光源.     

基于B3PyMPM∶Cs高效叠层OLED器件的制备

以B 3 PyMPM∶Cs/Al/HAT-CN作为电荷生成单元制备高效叠层绿色磷光有机电致发光器件,叠层器件的最大电流效率和最大流明效率分别为172.2 cd/A和111.0 lm/W,在5 mA/cm^2电流密度下,叠层器件的电压和亮度分别为传统器件的2.04倍和2.84倍.为了探究叠层器件性能优于传统器件的原因,研究了电荷生成单元内的电荷产生和注入过程,以及薄层铝对电子注入特性和电荷生成单元稳定性的影响.实验结果表明,电荷能够有效地在电荷生成单元内产生并顺利注入电子传输层中,B3PyMPM∶Cs和HAT-CN间Al薄层的插入能够进一步提高电子注入效率及器件结构的稳定性.     

A Novel Energetic Ionic Salt: Hydroxylammonium Potassium 3,3’-Dinitro-5,5’-bis-1,2,4-triazole-1,1’-diolate Dihydrate

A novel energetic ionic salt,hydroxylammonium potassium 3,3?-dinitro-5,5?-bis-1,2,4-triazole-1,1?-diolate dihydrate[(NH3OH)2K(DNOBT)1.5?2H2O],was synthesized and structurally characterized by elemental analysis,IR spectra,13C NMR and single-crystal X-ray diffraction.(NH3OH)2K(DNOBT)1.5?2H2O crystallizes in triclinic system,space group P with a=7.9212(6),b=9.1924(7),c=14.2549(15)?,a=103.917(2)°,β=99.736(2)°,g=104.8110(10)°,V=944.16(14)?^3,Z=2,Dc=1.855 g/cm^3,F(000)=538,μ=0.386 mm^-1,S=1.070,the final R=0.0525 and wR(I>2s(I))=0.1593.Thermal decomposition of(NH3OH)2K(DNOBT)1.5?2H2O and its intermediate potassium 1?-hydroxy-3,3?-dinitro-5,5?-bis-1,2,4-triazole-1-olate monohydrate[K(HDNOBT)?H2O]was studied by using DSC and TG-DTG.It was found that(NH3OH)2K(DNOBT)1.5?2H2O,which has primarily one exothermic decomposition process at 248.2℃,has better thermal stability than K(HDNOBT)?H2O which is decomposed at 210.9℃.     

A Novel Hybrid Solid Constructed from Tetramolybdate and Copper Complexes with Mixed Ligands: [{(Cu·phen)2(tp)}{(Cu·phen·H2O)2(tp)}{Mo4O14}]

A novel copper molybdate with mixed ligands, [{(Cu·phen)2(tp)}{(Cu·phen·H2O)2(tp)}{Mo4O14}] (phen=1,10-phenanthroline, tp=terephthalate) 1, has been hydrothermally synthesized and structurally characterized. The crystal belongs to monoclinic system, space group P21/c with a=13.1711(7), b=19.6132(10), c=13.6910(7) (A), β=117.6870(10)°, V=3131.8(3)(A)3, Z=2, C64H44Cu4Mo4N8O24, Mr=1946.99, Dc=2.065 g/cm3, F(000)=1920, μ(MoKα) (A) 2.198 mm-1, R=0.0810 and wR=0.2012 for 4233 observed reflections (Ⅰ ＞ 2σ(Ⅰ)). The structural analysis indicates that the title compound contains a discrete tetramolybdate cluster decorated with copper complex fragments and tp ligands bridging the clusters into a wave-like layer. The hydrogen bonding between adjacent layers further extends the compound into a 3-D framework.     

Synthesis and Crystal Structures of Novel Keggin and Dawson Polyoxometalates Containing Amantadine

Heteropolyoxometalates are a large family of potent medicines due to their excellent antiviral and antitumor activity 1-4, while their application in clinic meets great difficulties for their toxicity 5. How to synthesize heteropolyoxometalate medicines possessing high activity and low toxicity has become the focus in heteropolyoxometalate medicine research. Previously reported polyoxometalates showing medical activities are all salts simple Na+, K+ or NH4+ etc. inorganic cations, in which o…     

紫外光照处理对TiO2膜光伏性能的影响

近年来人们利用纳米晶TiO2电极取代普通的TiO2电极[1],使其太阳能电池的光电转换效率得到很大提高.纳米晶TiO2电极具有大量表面态,在化学上表现为Ti3+或Ti—OH,对于光生电荷的分离过程和迁移过程有重要影响.这些表面化学结构的变化可能会导致TiO2的光伏性能的变化.1997年Fujishima等[2]用紫外光照射TiO2膜使它具有超亲水的性质,结构分析表明,超亲水的原因在于光照使TiO2膜的表面形成Ti—OH[3].因此,在光照处理的同时可能会导致TiO2的光伏性的变化.本文对紫外光照处理TiO2膜的光伏性能进行了研究,并结合光诱导TiO2的亲水性变化对光伏性能变化的原因进行了讨论.     

带有长侧链醌类化合物的Langmuir膜及其表面电势

泛醌(Ubiquinone)和质体醌(Plastoquinone)作为非蛋白电子载体存在于动物线粒体呼吸链和植物光合作用链中.这两类物质在生物膜上有活性.     

担体对Fe-MnO催化剂CO加氢合成烯烃性能影响的TPSR表征

考察了不同担体担载的Ｆｅ－ＭｎＯ催化剂上ＣＯ加氢合成烯烃的反应。结果表明担体直接影响低碳烯烃选择性。通过对催化剂的ＣＯ，ＣＯ／Ｈ２，Ｃ２Ｈ４等吸附的ＴＰＳＲ表征及催化剂表面ＣＯ加氢微观反应的研究，证明以碱性担体为基质的ＰＢＣ催化剂具有强吸附ＣＯ能力，且生成的烯烃不易发生二次反应，因而ＰＢＣ催化剂具有较高的烯烃选择性；以酸性担体为基质的ＰＡＣ催化剂对ＣＯ为弱吸附，对Ｈ２为较强吸附，且烯烃会发生强烈的     

导电聚苯胺/钙基膨润土复合材料的制备

采用插层聚合法制备了导电聚苯胺/钙基膨润土、聚苯胺/有机化膨润土复合材料.以电导率为考核指标,通过正交设计优化了苯胺的加入量、反应温度和反应时间等参数.结果表明,苯胺的加入量影响较显著,反应温度对聚苯胺/有机化膨润土复合材料影响较聚苯胺/钙基膨润土体系明显,反应时间的延长,有利于聚苯胺/有机化膨润土复合材料电导率的提高.聚苯胺/钙基膨润土复合材料制备的最佳工艺条件为:苯胺加入量为70%,反应温度为0℃,反应时间为6 h;聚苯胺/有机化膨润土复合材料制备的最佳工艺条件为:苯胺加入量为70%,反应温度为室温,反应时间为8 h.利用红外光谱(FT-IR)、X射线衍射(XRD)和四探针技术表征了材料的组成、结构和性能.结果表明:膨润土经有机化后,晶面间距增大较多;苯胺单体与钙基膨润土插层聚合后,膨润土晶面间距增大不多;苯胺单体与有机化膨润土复合后,破坏了膨润土的晶格结构,形成了混杂复合体系,电导率达10-3S.cm-1.     

活性炭负载TiO2-Fe3O4磁性光催化剂的制备及性能

采用溶胶-凝胶法制备了易于固液分离的活性炭（AC）负载磁性光催化剂（TiO2-Fe3O4／AC）．样品通过SEM-EDX和X射线衍射法进行表征．通过在紫外光照射下降解亚甲基蓝评价其光催化降解能力．结果表明：负载22％Fe3O4的光催化剂（含20％TiO2和58％AC）的光催化活性最强（120min时亚甲基蓝的降解率达到87％,是纯TiO2的2．7倍）;磁性光催化剂可实现磁分离回收．