Krishnamurthy M, Rajgara F A, Mathur D
Tata Institute of Fundamental Research, 1 Homi Bhabha Road, Mumbai 400 005, India.
J Chem Phys. 2004 Nov 22;121(20):9765-8. doi: 10.1063/1.1819895.
Energetic H(2) (+) ions are formed as a result of intramolecular rearrangement during fragmentation of linear alcohols (methanol, ethanol, propanol, hexanol, and dodecanol) induced by intense, pulsed optical fields. The laser intensity regime that is accessed in these experiments (peak intensity of 8 x 10(15) W cm(-2)) ensures multiple ionization of the irradiated alcohol molecules such that Coulomb explosions would be expected to dominate the overall fragmentation dynamics. Polarization dependent measurements show, counterintuitively, that rearrangement is induced by the strong optical field within a single, 100 fs long laser pulse, and that it occurs before Coulomb explosion of the field-ionized multiply charged alcohols.
在强脉冲光场诱导下，线性醇（甲醇、乙醇、丙醇、己醇和十二醇）发生碎片化过程中，分子内重排导致形成了高能H(2) (+) 离子。这些实验中所达到的激光强度范围（峰值强度为8×10(15) W cm(-2)）确保了被照射醇分子的多次电离，因此预计库仑爆炸将主导整体碎片化动力学。与直觉相反的是，偏振相关测量表明，重排是由单个100飞秒长的激光脉冲内的强光场诱导的，并且它发生在场致电离的多电荷醇的库仑爆炸之前。
