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翻译 与高分子材料相关
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Emission and excitation spectra of powders were recorded on a ARC spectrometer (monochromators of 300mm focal length (1200 gmm−1), a 450W Xe-light source, Photomultiplier tube P2) at an angle of incidence of ca. 50◦ using a praying mantis type sample set-up. Reflectance spectra were obtained using an integrating sphere with a diameter of 70mm and 10mm port opening versus commercial white and black references (Labsphere), and BaSO4, respectively. Transparent monoliths were prepared in 1 cm plastic cuvettes, allowing standard absorption and luminescence measurements. The intensity of the 450W Xe source was detected with an Acton Photomultiplier tube P2. The excitation spectra were measured against Lumogen Red doped polymethylmethacrylate (doping level 50 ppm) powder and a polished disk of 3mm thickness, respectively, to evaluate the transparent monoliths. The Lumogen Red, with a constant quantum yield of 42% in the excitation range between 250 nm and 500 nm was generously provided by BASF/Ludwigshafen. It should be pointed out that the quantum yields given may be imprecise by an estimated margin of ±10%, however, the general trends described here will not be affected. |
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2楼2013-05-24 15:06:07
板凳匪徒
至尊木虫 (职业作家)
江北篮球学院MVP
- 翻译EPI: 63
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- 专业: 有机分子功能材料化学
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绿野繁华: 金币+20, 翻译EPI+1, ★★★很有帮助 2013-05-26 08:54:00
绿野繁华: 金币+20, 翻译EPI+1, ★★★很有帮助 2013-05-26 08:54:00
| 电弧光谱仪(300毫米焦距的单色器(1200(gmm)−1),450w的xe光源, P2光电倍增管) 在大约50◦的入射角使用螳螂型的样例设置记录了粉末的发射光谱和激发光谱。分别对市售的白(染料)参照样品和黑（染料）参照样品(蓝菲光学公司)以及BaSO4使用直径70毫米和10毫米端口开度的积分球来测得各自的反射率光谱。透明的独石在1厘米的塑料比色皿中制备,可以进行标准吸收和发光量的测量。450w的Xe源强度通过阿克顿P2光电倍增管来探测。分别测定掺杂有机玻璃(掺杂程度50ppm)的红（染料）粉末和3mm厚的抛光磁盘的激发光谱来鉴定透明独石。激发范围在250nm和500nm之间的42%量子产率常数的红（染料）是由路德维希港的巴斯夫公司慷慨提供的。需要指出的是得出的量子产率给可能无法精确估计到±10%的范围内,然而,这里描述的主要趋势是不会受到影响的。 |
3楼2013-05-24 20:02:43
4楼2013-05-26 08:54:19