FLUORESCENCE ALTERATION OF COAL AND POLYCYCLIC AROMATIC-HYDROCARBONS

被引：7

作者：

EBERHARDT, JE

NGUYEN, TH

READ, R

机构：

[1] CSIRO Division of Mineral and Process Engineering, Lucas Heights Research Laboratories, Menai, NSW 2234

来源：

ORGANIC GEOCHEMISTRY | 1992年 / 18卷 / 02期

关键词：

FLUORESCENCE; ALTERATION; COAL; ANTHRACENE; PENTACENE; PAH;

D O I：

10.1016/0146-6380(92)90124-G

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Coal and polycyclic aromatic hydrocarbon (PAH) fluorescence was excited by 442 nm laser light at flux density of almost-equal-to 27 kW/m2. Illuminating various coals in vacuum at almost-equal-to 1 Pa caused a small decrease in their fluorescence. In air or oxygen a very rapid decrease in fluorescence was followed by slow fluorescence growth. This growth was faster for lower rank coals. Physically reversible oxygen attachment enhanced the fluorescence. Similar results were obtained with anthracene, phenanthrene and pentacene layers. A photo-reaction mechanism is proposed to explain features of the positive alteration of coal and PAH fluorescence in oxygen.

引用

页码：145 / 153

页数：9

共 22 条

[1] PHOTOCHEMICAL PROCESSES ON ALUMINUM-OXIDE - A PULSED LASER STUDY OF PHOTOINDUCED REACTIONS [J].