Fluorescence of Solid Anthracene
Fluorescence of Solid Anthracene
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固体蒽的荧光
DOI：
10.1038/159706a0
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发表时间：
1947
期刊：
影响因子：
64.8
通讯作者：
E. Mikiewicz
中科院分区：
文献类型：
--
作者：
E. J. Bowen;E. Mikiewicz
固体蒽在波长3650埃光下的荧光。当固溶体中存在非常少量的并四苯时，这可以用“激子”机制来解释，即能量通过分子间的共振传递。这里所示的曲线图表示对该效果的定量检查，荧光的蓝色和绿色分量分别由光电管通过伊尔福德滤光器601和404测量。上图显示了在两个温度下，蓝色蒽荧光的下降和绿色并四苯荧光的上升随并四苯浓度的变化，以量子效率表示，可能误差为15%，并四苯浓度为3 × 10−5时，荧光发射几乎相等，而绿色荧光在10−3左右达到最大值。高于该浓度，发射的颜色变为纯并四苯的黄色，并且效率降低，这显然是由于超过了固溶体的极限。
THE fluorescence of solid anthracene in light of wave-length 3650 A. is changed from blue to green when very small quantities of naphthacene are present in solid solution. This is explicable by an ‘exciton’ mechanism whereby energy is handed on by resonance from molecule to molecule1. The graphs shown here represent a quantitative examination of the effect, the blue and green components of the fluorescence being measured by a photo-cell through Ilford filters 601 and 404 respectively. The upper graph shows for two temperatures the fall of the blue anthracene fluorescence and the rise of the green naphthacene fluorescence with concentration of the latter, expressed as quantum efficiencies with a probable error of 15 per cent. The emissions are about equal at a naphthacene concentration of 3 × 10−5, and the green reaches a maximum at about 10−3. Above this concentration the colour of the emission changes to yellow as for pure naphthacene, and the efficiency decreases, evidently due to the overstepping of the limits of solid solution.