Halogen Bonding in Iodo-perfluoroalkane/Pyridine Mixtures

被引：32

作者：

Fan, Haiyan ^{[1
]}

Eliason, Jeffrey K. ^{[1
]}

Moliva A., C. Diane ^{[1
]}

Olson, Jason L. ^{[1
]}

Flancher, Scott M. ^{[2
]}

Gealy, M. W. ^{[2
]}

Ulness, Darin J. ^{[1
]}

机构：

[1] Concordia Coll, Dept Chem, Moorhead, MN 56562 USA

[2] Concordia Coll, Dept Phys, Moorhead, MN 56562 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 2009年 / 113卷 / 51期

关键词：

RADIATION-MATTER OSCILLATIONS; INTERMOLECULAR INTERACTIONS; RAMAN-SCATTERING; NOISY LIGHT; SPECTROSCOPY; COMPLEXES; METHANOL; OXYGEN; WATER; POLARIZATION;

D O I：

10.1021/jp9057127

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Mole fraction and temperature studies of halogen bonding between 1-iodo-perfluorobutane, 1-iodo-perfluorohexane, or 2-iodo-perfluoropropane and pyridine were performed using noisy light-based coherent anti-Stokes Raman scattering (I-(2) CARS) spectroscopy. The ring breathing mode of pyridine both is highly sensitive to halogen bonding and provides a strong I-(2) CARS signal. As the lone pair electrons from the pyridinyl nitrogen interact with the a-hole on the iodine from the iodo-perfluoroalkane, the ring breathing mode of pyridine blue-shifts proportionately with the strength of the interaction. The measured blue shift for halogen bonding of pyridine and all three iodo-perfluoroalkanes is comparable to that for hydrogen bonding between pyridine and water. 2-Iodo-perfluoropropane displays thermodynamic behavior that is different from that of the 1-iodo-perfluoroalkanes, which suggests a fundamental difference at the molecular level. A potential explanation of this difference is offered and discussed.

引用

页码：14052 / 14059

页数：8

共 82 条

[1] Structural competition between hydrogen bonds and halogen bonds [J].