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5-[(3-磺羧基苯基)偶氮]-8-氨基喹啉的合成及其与铜的显色反应研究
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作者 徐继明 吴斌才 《化学分析计量》 CAS 2000年第2期26-27,共2页
以8-氨基喹啉为母体合成了5-[(3-磺羧基苯基)偶氮]-8-氨基喹啉(m-SPAQ)。在阳离子表面活性剂CT-MAB存在下,于pH8.3的缓冲溶液中,试剂与铜形成红色配合物,其最大吸收波长位于596mm,摩尔吸光系数为6.24×10~4L·mol^(-1)·cm^... 以8-氨基喹啉为母体合成了5-[(3-磺羧基苯基)偶氮]-8-氨基喹啉(m-SPAQ)。在阳离子表面活性剂CT-MAB存在下,于pH8.3的缓冲溶液中,试剂与铜形成红色配合物,其最大吸收波长位于596mm,摩尔吸光系数为6.24×10~4L·mol^(-1)·cm^(-1),铜的量在0~20ug/25mL范围内符合比尔定律,此法用于铝合金中微量铜的测定,结果满意。 展开更多
关键词 分光不镀法 8-氨基喹啉偶氮试剂
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Structure of the Universe
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作者 Shihao Chen 《International Journal of Astronomy and Astrophysics》 2018年第4期323-338,共16页
Based on a cosmological model without singularity, a possible structure of the universe is presented. It is proved that there must simultaneously be two sorts of symmetry breaking in the universe. The universe is comp... Based on a cosmological model without singularity, a possible structure of the universe is presented. It is proved that there must simultaneously be two sorts of symmetry breaking in the universe. The universe is composed of infinite s-cosmic islands, infinite v-cosmic islands and infinite transition zone. The existing and changing forms of the cosmic islands must be diverse. The cosmological principle holds only approximately within a cosmic island. No information can be exchanged between an s-cosmic island and an adjacent v-cosmic island so that every observer thinks his cosmic island to be the whole universe. It is possible that some cosmic islands are contracting, some cosmic islands are expanding, and other cosmic islands are stable for a time. But the universe as a whole is always invariable and contains all possible existing forms of matter. To give a possible explanation for orphan quasars. To predict some characteristics of contracting large and huge black holes in a cosmic island. The characteristics of the light coming from the contracting huge black holes are that the intensity of the light is huge relatively to their distance, the red shifts are huge, the distribution of the huge red shifts and the orphan quasars are anisotropic, and luminescence spectrum is very wide. 展开更多
关键词 COSMIC ISLAND QUASARS Anisotropy of Huge Red SHIFTS su(5) colour singlets SINGULARITY
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