Ir（IV）—罗丹明B—高碘酸钾—硫酸新体系催化光度测定超痕量铱

在硫酸介质及加热条件下,Ir(Ⅳ)对高碘酸钾氧化罗丹明B这一褪色反应有强烈的催化作用,藉自来水冷却中止反应,讨论催化光度测定超痕量铱的影响因素,建立一个检测限和线性范围分别为0.025ng/ml和0.05～3.0ng/ml铱的催化光度新方法。     

铱配合物绿色磷光材料的研究进展

铱配合物作为发光材料,具有发光效率高,磷光寿命短,发光颜色可调等优势,因此被人们广泛研究。作为发光性能最好的一类化合物,绿色磷光铱配合物更加引起人们跟多的重视。文章介绍了近年来绿色磷光铱配合物的研究进展。     

示波极谱法测定矿石中的微量铱

1 前言我们根据在示波极谱上可以得到与普通极谱同样的但更为灵敏的氢的催化波这一原理,将"盐酸—碘化钾—硫脲—碲"这一测定铱的体系用于配装新功能增进器(以下简称增进器)的JP—1A型示波极谱仪上,对体系各组份进行了试验,调整了底液各成份的用量;研究了原点电位、扫描电压速度、休止时间等对测定铱的影响;将仪器选     

Optoelectronic properties of new functionalized heteroleptic iridium complex

A new functionalized heteroleptic iridium complex coordinated with 1-phenylisoquinoline(1-piq) and a functionalized β-diketone(G1),Ir(1-piq)2G1,was synthesized and characterized by 1H-NMR,mass spectrometry and elemental analysis.The larger conjugation of the replacement of acetylacetone(acac) by a functionalized β-diketonate ligand led to a significant decrease in the HOMO level toward vacuum level,while Ir(1-piq)2G1 and Ir(1-piq)2(acac) showed red phosphorescent emissions of about 620 nm in dichloromethane...     

铱盐在AgBr乳剂中的作用

用(NH_4)_3IrCl_6(Ⅲ)和(NH_4)IrCl_6(Ⅳ)分别对立方体AgBr乳剂颗粒表面和内部进行敏化,用表面显影和内部显影的方法,对铱盐在乳剂颗粒中的作用进行了研究。实验表明,经铱表敏的AgBr乳剂表面感光度增加,而铱内敏的AgBr乳剂表面感光度降低,内部感光度增加;铱内敏并经灰化的乳剂在曝光后能形成直接正像。这是因为经化学灰化的铱内敏乳剂在曝光后,光生电子被乳剂颗粒内部的铱中心捕获而形成内潜影,光空穴则破坏颗粒表面的灰化中心,使其不能显影。因此,我们认为铱在乳剂颗粒内部起着电子陷阱的作用。     

Synthesis and optophysical properties of blue-emitting iridium （Ⅲ） complex bearing oxadiazole-based picolinic acid derivative

An iridium (III) bis[(4,6-difluorophenyl)pyridinato-N, C²][6-(6′-(4″-(5‴-phenyl-1‴, 3‴, 4‴-oxadiazole- 2‴-yl) phenoxy) hexyloxy picolinate) was synthesized and characterized by ¹H NMR and elementary analysis in order to study the effect of ancillary ligand of the oxadiazole-based picolinic acid derivative on optophysical properties of its iridium complex, and further to obtain an iridium complex with highly-efficient blue emission. The thermal stability, UV absorption and photoluminescent properties of this iridium complex were investigated. Compared with iridium (III) bis[(4,6-difluorophenyl)pyridinato-N, C²](picolinate) reported as a highly-efficient blue electroluminescent material, this iridium complex bearing an oxadiazole-based picolinic acid derivative presents higher thermal stability, more intense UV absorption at 291 nm and similar photoluminescent spectrum peaked at 469 nm. This indicates that tuning ancillary ligand of picolinic acid with an oxadiazole unit can improve the optophysical properties of its iridium complex. Foundation item: Projects(20772101, 50473046) supported by the National Natural Science Foundation of China; Project(2007FJ3017) supported by the Hunan Provincial Science Foundation, China; Project(07C764) supported by the Science Foundation of the Education Department of Hunan Province, China     

铂、铱金火花塞自动焊接设备

介绍了一种铂、铱金火花塞自动焊接设备，该设备用于将细小的铂、铱金丝焊接在火花塞的点火端上，全自动、焊接质量稳定可靠。