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2004•INDIAN JOURNAL OF CHEMISTRY- SECTION ARequires access

UV/visible luminescence from photo products in infrared multiphoton dissociation of acrylonitrile

Kumbil Kuttan Pushpa, Awadhesh Kumar, P.D. Naik, Avinash V. Sapre

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Abstract

Infrared multiphoton dissociation (IRMPD) studies are carried out on acrylonitrile at pressures of ∼ 10 torr by irradiation at 976 cm - 1 by a TEA CO 2 laser. The stable products on irradiation have been found to be H 2 , C 2 H 2 and C 2 H 4 as measured by gas chromatography and FTIR. With increased laser energy, the radical pathways compete with the molecular elimination channels leading to extensive decomposition of acrylonitrile. A broad visible luminescence (350-750 nm) has been observed which is assigned to the electronically excited carbene intermediates. Results on IRMPD are compared with those on UV laser induced dissociation of acrylonitrile.

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What this paper is about

Infrared multiphoton dissociation (IRMPD) studies are carried out on acrylonitrile at pressures of ∼ 10 torr by irradiation at 976 cm - 1 by a TEA CO 2 laser. The stable products on irradiation have been found to be H 2 , C 2 H 2 and C 2 H 4 as measured by gas chromatography and FTIR. With increased laser energy, the radical pathways compete with the molecular elimination channels leading to extensive decomposition of acrylonitrile. A broad visible luminescence (350-750 nm) has been observed which is assigned to the electronically excited carbene intermediates. Results on IRMPD are compared with those on UV laser induced dissociation of acrylonitrile.

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Available abstract

Infrared multiphoton dissociation (IRMPD) studies are carried out on acrylonitrile at pressures of ∼ 10 torr by irradiation at 976 cm - 1 by a TEA CO 2 laser. The stable products on irradiation have been found to be H 2 , C 2 H 2 and C 2 H 4 as measured by gas chromatography and FTIR. With increased laser energy, the radical pathways compete with the molecular elimination channels leading to extensive decomposition of acrylonitrile. A broad visible luminescence (350-750 nm) has been observed which is assigned to the electronically excited carbene intermediates. Results on IRMPD are compared with those on UV laser induced dissociation of acrylonitrile.

Key concepts: Infrared multiphoton dissociation, Acrylonitrile, Dissociation (chemistry), Photochemistry, Luminescence, Infrared, Excited state, Irradiation

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