超冷氦纳米液滴中乙炔 - 呋喃的高分辨率红外光谱。

High resolution IR spectroscopy of acetylene-furan in ultracold helium nanodroplets.

作者信息

Metzelthin Anja, Birer Ozgür, Sánchez-García Elsa, Havenith Martina

机构信息

Department of Physical Chemistry II, Ruhr-University Bochum, Universitatsstr. 150, 44780 Bochum, Germany.

出版信息

J Chem Phys. 2008 Sep 21;129(11):114307. doi: 10.1063/1.2976772.

DOI:10.1063/1.2976772

PMID:19044960

Abstract

We have measured the IR spectrum of the acetylene-furan complex in ultracold helium nanodroplets in the region of the nu(3) CH(asym)-stretch vibration of the acetylene (between 3240 and 3300 cm(-1)). We have observed eight bands that can be attributed to acetylene-furan complexes. Two of these bands are assigned to two different isomers of the 1:1 acetylene-furan complex. The vibrational band at 3267.4 cm(-1) is assigned to the CH(asym)-stretch vibration of the dimer structure with the C-H of the acetylene being attached to the pi-system of the furan. The peak at 3272.1 cm(-1) is assigned to the CH(asym)-stretch vibration of the dimer structure with the C-H of the acetylene being attached to the oxygen atom of the furan. These assignments are confirmed by additional measurements of the spectrum of the (13)C-acetylene-furan complex.

摘要

我们测量了超冷氦纳米液滴中乙炔 - 呋喃复合物在乙炔的ν(3) CH（不对称）伸缩振动区域（3240至3300 cm⁻¹之间）的红外光谱。我们观察到八个可归因于乙炔 - 呋喃复合物的谱带。其中两个谱带归属于1:1乙炔 - 呋喃复合物的两种不同异构体。3267.4 cm⁻¹处的振动谱带归属于二聚体结构的CH（不对称）伸缩振动，此时乙炔的C - H键连接到呋喃的π体系上。3272.1 cm⁻¹处的峰归属于二聚体结构的CH（不对称）伸缩振动，此时乙炔的C - H键连接到呋喃的氧原子上。这些归属通过对¹³C - 乙炔 - 呋喃复合物光谱的额外测量得到了证实。