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ZEKE-PFI spectroscopy of benzocaine

机译:苯佐卡因的ZEKE-PFI光谱

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摘要

The adiabatic ionization threshold (AIT) of trans- and gauche-benzocaine has been measured by zero electron kinetic energy-pulsed field ionization (ZEKE-PFI) spectroscopy to be 7.8412 +/- 0.0008 eV ( lasers at 34134.4 and 29109.3 cm(-1)) and 7.8421 +/- 0.0004 eV ( 34144.8 + 29105.7 cm(-1)), respectively. AITs computed at the B3LYP/AUG-cc-p-VDZ level for the two conformers are some similar to 2500 cm(-1) lower than the experimental; in contrast their energy difference is very close. The trans- benzocaine cation ZEKE spectra has been recorded taking a number of S-1 intermediate vibronic states. The spectra provide an energy threshold for the appearance of intramolecular vibrational redistribution ( IVR) around similar to 540 cm(-1) in the S-1 state.
机译:通过零电子动能脉冲场电离(ZEKE-PFI)光谱测得反式和gauche-苯甲卡因的绝热电离阈值(AIT)为7.8412 +/- 0.0008 eV(激光在34134.4和29109.3 cm(-1 ))和7.8421 +/- 0.0004 eV(34144.8 + 29105.7 cm(-1))。在两个构象体的B3LYP / AUG-cc-p-VDZ水平上计算的AIT值比实验值低2500 cm(-1)。相反,它们的能量差非常接近。记录了许多S-1中间振动态的反式苯并卡因阳离子ZEKE光谱。该光谱为分子内振动重新分布(IVR)的出现提供了能量阈值,类似于S-1状态下的540 cm(-1)。

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