弱相互作用、Tunnel消旋和手性稳定性
Weak Interactions ,Tunneling Racemization and Chiral Stability
摘要：
本文在薛定谔方程的框架下研究了分子间相互作用对活性分子隧道消旋的影响。将活性分子假定为二能级系统，并将左右异构现象看作是一个双底谐振势阱。假设活性分子嵌入在气体、液体或固体中，受到由样品分子产生的扰动势U的影响。在我们的模型中，我们考虑了由于左（L）和右（R）构型之间的弱相互作用而导致的能量E的差异。我们已经证明，当E等于零时，系统不可能是光学稳定的：在稀释气体或压缩气体和液体的情况下，旋光性渐近趋于零，或者当分子被隔离或受到静电势时，旋光性在零附近周期性振荡。只有当E不等于零时，系统才是光学稳定的，这取决于势U的强度参数和自发隧穿的大小。
英文摘要：
We study in the framework of the Schrodinger equation the effect of intermolecular interactions on the tunneling racemization of the active molecule. The active molecule is assumed as a two-level system and the left-right isomerism is viewed in terms of a double-bottomed harmonic potential well. The active molecule is assumed to be embedded in a gas, liquid or solid, submitted to a perturbing potential U created by the molecules of the sample. In our model we take into account the difference of energy E due to the weak interactions between the left (L) and right (R) configurations. We have shown that when E is equal to zero the system cannot be optically stable: the optical activity tends asymptotically to zero in the case of dilute gases or compressed gases and liquids or oscillates periodically around zero when the molecules are isolated or submitted to a static potential. Only when E is different of zero the system can be optically stable depending on the strength parameters of the potential U and on the magnitude of the spontaneous tunneling.
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