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Investigation of spectral forms of 5-cyano-2,2,8,8,12,13,17, 18-octamethylisobacteriochlorin in Shpol'skii matrices

Authors
Journal
Spectrochimica Acta Part A Molecular Spectroscopy
0584-8539
Publisher
Elsevier
Publication Date
Volume
48
Issue
2
Identifiers
DOI: 10.1016/0584-8539(92)80018-r

Abstract

Abstract The spectral-luminescent properties of 5-cyano-2,2,8,8,12,13,17,18-octamethylisobacteriochlorin (COMiBC), synthesized in the laboratory of Prof. A. Eschenmoser (Eidgenössische Technische Hochschule, Zürich), in n-hexane and benzene at room, liquid-nitrogen and liquid-helium temperatures have been investigated. At 4.2 K the quasi-line spectra of two forms of COMiBC in n-hexane have been obtained. A vibrational analysis was carried out and conclusions concerning the form of some normal modes are reported. A photoinduced NH rearrangement of the cis form of COMiBC into the trans form has been discovered.

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