A Kinetic Study on the Chemiluminescence of 9-Alkylacridines upon Air Oxidation in Alkaline Aprotic Solvents
作者:Isao Kamiya、Takashi Sugimoto、Kuniaki Yamabe
DOI:10.1246/bcsj.57.1735
日期:1984.7
9-Methyl- (1a), 9-benzyl- (1b), 9-(diphenylmethyl)- (1c), and 9-ethylacridine (1d) were employed to obtain luminescent features of the acridines. The decay of chemiluminescence (CL) exhibits a pseudo-first order behavior with apparent rate constants 0.10, 3.30, 4.10, and 0.07 min−1 at 312 K for 1a, 1b, 1c, and 1d, respectively. A relatively high CL quantum yield (6.3×10−3) is provided for 1a, in contrast to low yields for 1b, 1c, and 1d (1.5×10−6, 1.1×10−5, and 1.3×10−4, respectively). A reaction mechanism involving a cleavage of a dioxetane intermediate to give excited singlet acridone anion is plausible for the luminescent reaction. In view of the fact that several dioxetanes decompose to give excited singlet products in high yields, the CL appears to arise from a minor reaction.
采用 9-甲基(1a)、9-苄基(1b)、9-(二苯基甲基)-(1c)和 9-乙基吖啶(1d)来获得吖啶类化合物的发光特征。在 312 K 下,1a、1b、1c 和 1d 的化学发光(CL)衰减表现出伪一阶行为,表观速率常数分别为 0.10、3.30、4.10 和 0.07 min-1。1a 的 CL 量子产率相对较高(6.3×10-3),而 1b、1c 和 1d 的量子产率较低(分别为 1.5×10-6、1.1×10-5 和 1.3×10-4)。发光反应的机理可能是二氧杂环丁烷中间体发生裂解,产生激发的单色吖啶酮阴离子。鉴于一些二氧杂环丁烷分解后会产生高产率的激发单色产物,发光似乎是由一个次要反应引起的。