The infrared spectrum of Al+–benzene in the gas phase

van Heijnsbergen, D.; Jaeger, T.D.; von Helden, G.; Meijer, Gerard; Duncan, M.A.

doi:10.1016/S0009-2614(02)01341-6

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The infrared spectrum of Al⁺–benzene in the gas phase

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van Heijnsbergen, D., Jaeger, T., von Helden, G., Meijer, G., & Duncan, M. (2002). The infrared spectrum of Al⁺–benzene in the gas phase. Chemical Physics Letters, 364(3-4), 345-351. doi:10.1016/S0009-2614(02)01341-6.

Cite as: https://hdl.handle.net/21.11116/0000-000B-4686-F

Abstract

The Al–benzene complex is produced by laser vaporization in a pulsed nozzle source. It is ionized with an ArF excimer laser (193 nm), and the Al⁺(benzene) ions are stored in a quadrupole ion trap. Infrared excitation with a tunable free electron laser induces multiphoton photodissociation, and fragment ions are analyzed by a time-of-flight mass spectrometer. The infrared spectrum of Al⁺(benzene) is measured with resonance-enhanced multiphoton photodissociation (IR-REMPD) spectroscopy. Bands in the 600-1800 cm ^-1 region correspond to benzene vibrations shifted by the metal bonding. The spectrum indicates that Al⁺ binds in the symmetric η⁶π configuration on the benzene molecule.