鄰接羰基的萘環異核環形化合物的光激發光

Photoluminescence Studies on the Cyclic 1-Carbonyl-8-Hetero-Naphthalene Derivatives

周良建(Lien-Chien Chou) ； 方泰山(Tai-Shan Fang) ； 陳素貞(Su-Jen Chen)

《化學》 49卷1期 (1991/03) Pp. 27-32

https://doi.org/10.6623/chem.1991004

摘要

研究化合物1、2及3銜接於莱環1-位羰基與8-位間的異核原子對分子激態能量的影響。此系列化合物的^1(n,π*),^1(π,π*)狀態能量差很小。化合物2、3的最低單激態爲1(π,π*)，無磷光放射。化合物2的螢光效率爲0.39，而化合物3，則近乎零。化合物1，則有可切換的最低激態：在苯中，没有螢光，只有量子效應0.00033，生命期約490usec，波長在576nm的磷光^3(n,π*)，而在77K的甲基環己烷間質中，生命期爲100msec。在甲醇或矽膠中，則最低激態爲^1(π.π*)，能發出螢光效率爲0.185，彼長在446nm的螢光。

並列摘要

The photophysical properties of the cyclic heteroatomic effects of acenaphthenone(1), naphthostyril(2), and naphtholactone(3) were studied. The lowest excited singlet states of naphthostyril and naphtholactone are both (π,π *) states, whereas that of hthenone is a switchable n, or and state depending on solvents. The lowest (n, π*) triplet state phosphorescence at 576 nm 638 nm (vibronic) in causes the 446 nm fluorescence benzene with 0.00033 quantum efficiency. However, of acenaphthenone with 0.185 quantum efficiency i alcohol silica correspondent to the emission of the lowest (π,π*) singlet state of keto form. The phosphorescence lifetime of acenaphthenone in soft methylcyclohexane glass at 77K monitored at 570 nm is 100 ms.