Crucial Dependence of Chemiluminescence Efficiency on the<i>Syn</i>/<i>Anti</i>Conformation for Intramolecular Charge-Transfer-Induced Decomposition of Bicyclic Dioxetanes Bearing an Oxidoaryl Group
作者:Masakatsu Matsumoto、Haruna Suzuki、Nobuko Watanabe、Hisako K. Ijuin、Jiro Tanaka、Chizuko Tanaka
DOI:10.1021/jo2006945
日期:2011.6.17
Thermally stable rotamers of bicyclic dioxetanes bearing 6-hydroxynaphthalen-1-yl (anti-5a and syn-5a), 3-hydroxynaphthalen-1-yl (anti-5b and syn-5b), and 5-hydroxy-2-methylphenyl groups (anti-5c and syn-5c) were synthesized. These dioxetanes underwent TBAF (tetrabutylammonium fluoride)-induced decomposition accompanied by the emission of light in DMSO and in acetonitrile at 25 °C. For all three pairs
(双环二恶丁环轴承6-羟基萘-1-基的热稳定旋转异构体的抗-图5a和SYN -图5a),3-羟基萘-1-基(抗- 5B和SYN -图5b),和5-羟基-2-甲基苯基(抗- 5C和SYN -图5c)的合成。这些二氧杂环丁烷经历了TBAF(四丁基氟化铵)诱导的分解,并伴随着DMSO和乙腈在25°C下的发光。对于三对旋转异构体,化学发光效率Φ CL为抗- 5明显高于8-19倍,对于顺式- 5,和CTID(电荷转移诱导的分解)的用于速率抗- 5比更快顺- 5。旋转异构体在5a和5c上的化学发光光谱是不同的。这种差异在旋转异构体之间化学发光光谱可以推测是由于在的结构中的差从头酮酰亚胺抗- 14和SYN - 14处于激发态,其继承相应中介阴离子二恶丁环的结构的抗- 13和SYN - 13。从化学方法研究了氧化苯基取代的二氧杂环丁烷的CTID激发机理,讨论了anti - 5和syn - 5之间化学发光效率的重要区别。