The structure, photochemical reactivity, and photophysical properties of adamantyl X-substituted aryl ethers and a comparison with the alkyl groups, methyl, <i>tert</i>-butyl, and allyl
作者:A L Pincock、J A Pincock
DOI:10.1139/v05-117
日期:2005.9.1
The structure, photophysical properties, and photochemistry of the adamantyl aryl ethers 1 in both methanol and cyclohexane have been examined. UV absorption spectra, 13C NMR chemical shifts, X-ray structures, and Gaussian calculations (B3LYP/6-31G(d)) indicate that these ethers adopt a 90° conformer in the ground state. In contrast, fluorescence spectra, excited singlet state lifetimes, and calculations
已经检查了甲醇和环己烷中的金刚烷基芳基醚 1 的结构、光物理性质和光化学。UV 吸收光谱、13C NMR 化学位移、X 射线结构和高斯计算 (B3LYP/6-31G(d)) 表明这些醚在基态采用 90° 构象异构体。相比之下,荧光光谱、激发单线态寿命和计算 (TDDFT) 表明在第一激发单线态 S1 中首选 0° 构象异构体。在任一溶剂中的辐照导致金刚烷和相应的苯酚作为主要产物的形成,两者均衍生自醚键均裂产生的自由基中间体。4-氰基取代的醚 1j 是唯一一种在甲醇中照射时形成离子衍生产物 1-甲氧基金刚烷(产率 16%)的醚。