High resolution S1←S0 fluoescence excitation spectra of the 1‐ and 2‐hydroxynaphthalenes. Distinguishing the cis and trans rotamers

摘要: Both fluorescence excitation and dispersed emission techniques have been used to study the S1←S0 electronic spectra of 1‐ 2‐hydroxynaphthalene (1/2HN) in collision‐free environments a supersonic jet twice‐skimmed molecular beam, using both pulsed high‐resolution cw lasers operating ultraviolet. In experiments, we observe that each molecule exhibits two origins, separated by 274 cm−1 1HN 317 2HN. beam resolve rotational structure four bands determine inertial constants all eight zero‐point vibrational levels, accurate ±0.1 MHz. We also orientations optical transition moments frame. Significant differences moment are observed band. Similar experiments performed on hydroxy‐deuterated 1/2HN (1/2DN).A comparison results obtained for 1/2DN with those c...