以5-取代-8-羟基喹啉和2-苯基吡啶为配体的金属铱配合物的合成、表征及光致、电致发光性质

本文通过在8-羟基喹啉的5位上引入氨基和取代的苯基,合成了系列二-[2-苯基吡啶（C^N）][5-取代-8-羟基喹啉（N^O）]铱（Ⅲ）配合物（（C^N）2IrQ）.这里CN代表2-苯基吡啶,Q代表5-取代-8-羟基喹啉.通过1HNMR、13CNMR、MS、元素分析、单晶X-衍射等对配合物的化学和晶体结构进行了表征.利用循环伏安、UV-Vis、光致和电致发光光谱等对它们的光物理性质进行了表征.热重分析表明苯环上的取代基对配合物热稳定性有很大影响.常温下,几种5-取代苯基喹啉铱配合物的溶液和固体产生红色磷光发射,光致发光（PL）光谱在666和687nm附近出现两个强度基本相等的发射峰.配合物的发光性质主要受喹啉环和5位苯基的影响,苯环上的取代基团对配合物的发光性质影响不大.而5-氨基喹啉铱配合物PL光谱的最大发射峰在550nm,其PL光谱主要受2-苯基吡啶的影响.将配合物二-[2-苯基吡啶（C^N）][5-（4-甲氧基苯基）-8-羟基喹啉（N^O）]铱（Ⅲ）（7b）掺杂在聚2,7-（9,9-二辛基）芴（PFO）和30%（质量分数）的2-对叔丁基苯基-5-对联苯基-1,3,4-口恶二唑（PBD）的主体材料中,制备了聚合物发光器件（OLED）,器件电致发光（EL）光谱的发射峰在672nm处,18V时最大亮度为350cd/m2,在电压14V时CIE色坐标值为（0.61,0.33）,是一红光OLED器件.     

High-efficiency saturated red emission from binuclear cyclo-metalated platinum complex containing 5-(4-octyloxyphenyl)-1,3,4-oxadiazole-2-thiol ancillary ligand in PLED

A novel red-emitting binuclear platinum complex (dfppy)2Pt2(C8OXT)2 was synthesized and characterized,in which dfppy represents 2-(4’,6’-difluorophenyl)pyridinato unit and C8OXT is abbreviated for 5-(4-octyloxyphenyl)-1,3,4-oxadiazole-2-thiol as a bridging ancillary ligand.Its photophysical,electrochemical and electroluminescent characteristics were primarily studied.The made single-emissive-layer (SEL) polymer light-emitting devices using (dfppy)2Pt2(C8OXT)2 as emitter exhibited a saturated red emission peaked at 620nm.The best device performances were obtained in the device at 8wt% dopant concentration,with a maximum external quantum efficiency of 8.4%,a current efficiency of 4.2cd/A and brightness of 3228cd/m2.This work provides an effective approach to obtain high-efficiency red emission through construction of new binuclear platinum complex and its doped SEL devices.     

Ds介子几个重要衰变分支比的绝对测量

在正负电子对撞能量4.03GeV处,BES实验在BEPC对撞机上完成了D_s介子纯轻子衰变,半轻子衰变和φπ⁺分支比的绝对测量.文章详细描述了用于π与K识别的联合置信度方法,D_s单标记和双标记技术,以及计算Ds衰变分支比的最大似然函数.对所得物理结果做了讨论和评述.对未来D_s物理改进测量做了展望     

Method for studying diatomic rovibrational spectra at a given vibrational state

An algebraic method for rotational energies at a given vibrational state(AMr(v)) is proposed in this study in order to obtain unknown high-lying rovibrational energies. Applications of this method to the ground electronic state X~1Σ~+of CO and the excited state C~1Σ~+of~(39)K~7Li molecules show the following:(1) the AMr(v) can give the rational upper limit J of a rotational quantum number of a diatomic electronic state;(2) the full AMr(v) rovibrational energies {E_(υJ)}_υ of given vibrational states not only reproduce all known experimental data excellently but also predict precisely the values of all high-lying rovibrational energies,which may not be available experimentally.     

Orthogonal arrays obtained by generalized difference matrices with g levels

Nowadays orthogonal arrays play important roles in statistics, computer science, coding theory and cryptography. The usual difference matrices are essential for the construction for many mixed orthogonal arrays. But there are also orthogonal arrays which cannot be obtained by the usual difference matrices, such as mixed orthogonal arrays of run size 60. In order to construct these mixed orthogonal arrays, a class of special so-called generalized difference matrices were discovered by Zhang (1989,1990,1993,2...     

基于5-芳基-2-巯基噁二唑辅助配体的双核环金属铂配合物的合成及高效电致红光发光器件

设计合成了一种新型的基于5-芳基-2-巯基噁二唑辅助配体的双核环金属铂配合物（dfppy）2Pt2（C8OXT）2,其中dfppy为2-（4,6-二氟苯基）吡啶,C8OXT为5-苯基-2-巯基-1,3,4-噁二唑桥连配体.系统研究了该双核铂配合物（dfppy）2Pt2（C8OXT）2的热稳定性、光物理、电化学及电致发光性能.以（dfppy）2Pt2（C8OXT）2作为客体掺杂到聚合物主体材料中制备了单发光层聚合物电致发光器件.器件展现了饱和的红光发射,其最大发射峰为620nm.当配合物掺杂浓度为8wt%时,器件性能达到最好.其最高外量子效率为8.4%,最高电流效率为4.2cd/A,最大亮度为3228cd/m2.本研究表明,以5-苯基-2-巯基-1,3,4-噁二唑作为桥连配体的双核铂配合物在聚合物器件中能够实现高效红光发射.     

Delayed feedback control of a chemical chaotic model

The Willamowski–Rössler model system is investigated. It has been found that the system can be locked in a special district: stable without oscillation, periodic-1 oscillation, periodic-2 oscillation by the time delayed feedback. Numerical simulation result has also shown that the initial condition can affect the result of chaos controlling.     

Recent Beijing Spectroscopy (BES) results

Recent experimental results from Beijing Spectroscopy (BES) are reviewed, including the hadron spectroscopy from J/ψ decays, and a number of new states are found or confirmed, including σ, κ, X(1835), ωφ threshold enhancement in J/ψ→γωφ, a broad resonance in J/ψ→K ⁺ K ⁻ π ⁰, decay studies of ψ(2S) and χ _CJ , as well as the results of ψ(3770) non-D decays. The current status of BEPCII/BESIII, the major upgrade of BEPC/BESII, is also reported. Supported by the National Natural Science Foundation of China (Grant No. 10491300)     

A Method of Determining Representation of Quonic Algebra

In this letter, we construct representation of quonic algebra in quite a different method compared with the conventional one.