Jet-cooled rotational spectrum of laser-ablated phenylalanine.
Jet-cooled rotational spectrum of laser-ablated phenylalanine.
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激光烧蚀苯丙氨酸的喷射冷却旋转光谱。
DOI：
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发表时间：
2011
影响因子：
2.9
通讯作者：
J. Alonso
中科院分区：
文献类型：
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作者：
C. Pérez;S. Mata;S. Blanco;J. López;J. Alonso
用激光烧蚀分子束傅里叶变换微波光谱（LA-MB-FTMW）首次记录了中性苯丙氨酸分子的转动光谱。根据转动和（14）N核四极耦合常数的实验值，确定了两种由共轭O-H···N和N-H···π氢键相互作用稳定的构象.其他低能量构象的旋转光谱的观测不到已被归因于发生在激光烧蚀过程中的光致碎裂。核四极耦合相互作用已被直接用于确定氨基的取向，并识别和实验表征N-H···π相互作用。
The rotational spectrum of neutral phenylalanine has been recorded for the first time using laser-ablation molecular-beam Fourier transform microwave spectroscopy (LA-MB-FTMW). Two conformers stabilized by conjugative O-H···N and N-H···π hydrogen bond interactions have been conclusively identified on the basis of experimental values of rotational and (14)N nuclear quadrupole coupling constants. The nonobservation of the rotational spectra of the other low-energy conformers has been attributed to the photofragmentation that takes place in the laser ablation process. Nuclear quadrupole coupling interactions have been used directly to determine the orientation of the amino group and to identify and experimentally characterize the N-H···π interactions.