室温下吡啶溶液中的富勒稀荧光研究(英文)

室温下,在C6 0 -吡啶溶液中观察到了3 99nm到75 0nm范围内C6 0 丰富的荧光峰。C6 0 和吡啶之间的相互作用,破坏了C6 0 分子的高度对称性,从而放松了选择定则,使得荧光辐射率增强。这种相互作用也被C6 0 -吡啶溶液中C6 0 的电化学还原和表面增强拉曼散射证实。

Central Place Theory and Distribution of Post Offices in Cities

The feasibility of application of the Central Place Theory in the distribution of post offices in cities is analysed, the grade scale structure and space distribution structure Shijiazhauang of post offices in city are studied, the research results prove the actual value of the Central Place Theory, and the suggestion of adjustment in the space distribution Shijiazhuang of post offices in city is put forward.