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Proof against 2′‐hydroxy‐3‐prenylflavone‐oxygen complex by laser desorption/ionization time‐of‐flight mass spectrometry
Author(s) -
Fukai Toshio,
Nomura Taro
Publication year - 1998
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/(sici)1097-0231(19981215)12:23<1945::aid-rcm413>3.0.co;2-7
Subject(s) - chemistry , mass spectrometry , ion , time of flight mass spectrometry , ionization , desorption , oxygen , mass spectrum , molecule , analytical chemistry (journal) , oxide , photochemistry , ground state , amorphous solid , atomic physics , chromatography , organic chemistry , physics , adsorption
Photo‐oxidative cyclization of 2′‐hydroxy‐3‐prenylflavones has been examined using laser desorption/ionization time‐of‐flight (LDI‐TOF) mass spectrometry. The LDI‐TOF mass spectrum of an amorphous solid of morusin gave the oxide ions [M + OH] + and [M + O 2 H] + . On the other hand, the oxide ions could not be detected in the LDI‐TOF mass spectrum of crystalline morusin. The observation of the oxide ions is proof against the presence of an oxygen pocket on the molecule of morusin in the amorphous solid state. The oxygen pocket may correspond to a contact–charge transfer complex [morusin …… O 2 ] in the ground state of morusin in a solution which was postulated earlier in the photoreaction mechanism of the flavone. Copyright © 1998 John Wiley & Sons, Ltd.