Solvent and substituent effects in aromatic carbonyl compounds: The lowest triplet states of xanthone and xanthone-18O1
Solvent and substituent effects in aromatic carbonyl compounds: The lowest triplet states of xanthone and xanthone-18O1
复制标题
芳香族羰基化合物中的溶剂和取代基效应：氧杂蒽酮和氧杂蒽酮-18O1 的最低三重态
DOI：
10.1080/00268977600101091
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发表时间：
1976
影响因子：
1.7
通讯作者：
W. Mantulin
中科院分区：
文献类型：
--
作者：
H. Pownall;W. Mantulin
本文研究了氧杂蒽酮和氧杂蒽酮-18 O 1在乙醇-乙醚-异戊烷（EPA）和3-甲基戊烷（3-MP）中的磷光。在这种酮的双重磷光是由于存在两种不同的基态构象，其中每一个有一个特征的三重态。较长寿命的磷光被分配到一个更平面的构象比短寿命的物种。因为基于羰基伸缩频率的级数出现在短寿命和长寿命组分中，所以我们将一些n，π * 特征分配给两种形式。首次报道了氧杂蒽酮最低1（n，π *）态的热布居荧光。
The phosphorescence of xanthone and xanthone-18O1 in ethanol-ether-isopentane (EPA) and in 3-methylpentane (3-MP) has been studied between 12 and 125 K. The dual phosphorescence in this ketone is attributed to the existence of two different ground-state conformations, each of which has a characteristic triplet state. The longer-lived phosphorescence is assigned to a more planar conformation than the short-lived species. Because a progression based on the carbonyl stretch frequency appears in both short and long-lived components, we assign some n, π* character to both forms. Thermally populated fluorescence from the lowest 1(n, π*) state of xanthone is also reported for the first time.