Study of some phenolic-iodine redox polymeric products by thermal analyses and mass spectrometry

Summary

This paper describes the use of the mass spectrometry (MS), thermal analyses (TA) and other physico-chemical methods to investigate the structure of two newly synthesized phenolic-iodine derivative polymeric products. These two products are formed as a result of redox-interaction of adrenaline hydrogen tartrate (AHT, I) with iodate (IO^- ₃) and periodate (IO^- ₄). The characterization of the two products were achieved satisfactorily by using the above tools and their proposed general formulae, were found to be C₅₂H₆₇O₃₆N₄I (AHT- IO^- ₃, II) and C₂₆H₃₄O₁₈N₂I₂(AHT- IO^- ₄, III). The fragmentation behavior of the main compound (AHT) in MS and TA (TG and DTA) techniques was investigated and compared. The results obtained were used to explain the fragmentation of the products AHT- IO^- ₃and AHT- IO^- ₄in mass spectrometry and thermal analyses techniques. The stabilities of different fragments were discussed. The results indicate that the two techniques are supporting each other in which the mass spectrometry provides the structural information in gas phase while the thermal analyses provides the quantitative fragmentation in the solid-state.