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zhangwei章薇铁虫 (初入文坛)
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| 1H (500 MHz) and 13C NMR (125 MHz) spectra were recorded on a Bruker-AC500 spectrometer with CDCl3 as the solvent and tetramethylsilane (TMS) as the internal standard, and are expressed in ppm (δ). Elemental analysis was performed on a Perkin-Elmer 2400. UV-vis absorption spectra were recorded on a Hitachi U-4100 spectrophotometer. Fluorescence measurements were carried out with a Hitachi F-4600spectrophotometer. The peak wavelength of the lowest energy absorption band was used as the excitation wavelength for PL measurement. The fluorescence quantum yield (F) was determined at room temperature by the dilution method using fluorescein in water (pH¼ 11) as the reference in which the absolute values of maximal absorption are less than 0.1.34 Powder wide-angle X-ray diffraction (PWXD) experiments were performed on a powder X-ray diffractometer (INCA Energy, Oxford Instruments) operating at 3 kW. Differential scanning calorimetry (DSC) curves were determined on a Netzsch DSC 204F1 at a heating rate of 10 ℃ min-1. |
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RXMCDM: 金币+1, 多谢应助！ 2014-09-16 12:19:31
zhangwei章薇: 金币+8, 翻译EPI+1 2014-09-17 09:48:42
RXMCDM: 金币+1, 多谢应助！ 2014-09-16 12:19:31
zhangwei章薇: 金币+8, 翻译EPI+1 2014-09-17 09:48:42
| 以CDCl3为溶剂、四甲基硅烷（TMS）为内标，用Bruker-AC500光谱仪记录1 H（500 MHz）和13 C NMR（125 MHz）的光谱，并表示为ppm（δ）。用Perkin-Elmer 2400进行元素分析。用日立U-4100分光光度计记录紫外-可见光吸收光谱。用Hitachi F-4600分光光度计进行荧光分析。用最低能量的吸收带的峰值波长作为激发波长用于PL测定。在室温下用稀释法测定荧光量子产率（F），用溶于水中的荧光素（pH值= 11）作为标准，其中最大吸收的绝对值小于0.1.34。用粉末X射线衍射仪（INCA能源，牛津仪器）进行粉末广角X射线衍射（PWXD）实验，实验用功率为3千瓦。用Netzsch DSC 204F1测定差示扫描量热（DSC）曲线，加热率为每分钟10℃。 |
2楼2014-09-16 11:03:31