Toshikazu Tsuchiya

X‐ray photoelectron spectroscopy of tetraphenylporphin and phthalocyanine

The x‐ray photoelectron spectra of tetraphenylporphin, phthalocyanine and their copper complexes were measured. The copper complexes show a single nitrogen 1s photoline, whereas the metal free bases give rise to a doublet nitrogen 1s photoline. The central pyrrole and aza nitrogens in the metal free bases could be identified, whereas the central and meso‐bridging aza nitrogens in phthalocyanine could not be discriminated. Each of the central two protons in the metal free bases is localized on one of the central four porphinato nitrogens. The shifts in N 1s binding energy observed in the present work could be reproduced by the shifts in the charge density on nitrogen obtained for the bonded structure by an extended Huckel molecular orbital calculation.

A study of santonins and their derivatives by mass spectrometry

Abstract Fragmentation patterns of santonins and their derivatives under electron impact have been investigated by th use of high resolution mass spectra and a deuterium labelling technique. The relationship between conformation of santonins and their spectra is discussed.

Pyrolysis of organic compounds—II : The flash pyrolysis of camphor and its related compounds☆

Abstract Camphor and its related compounds were pyrolyzed at 550–800° for 0·15–0·2 sec under high dilution (partial pressure of 2–3 mm). The mechanisms are discussed by correlating the structures of the fragments to the original structures and by employing a deuterium labeling technique.

Mass Spectrometric Study of Positive‐Ion Emission from Iron Oxide Catalysts Containing Alkali Metals

Samples of iron oxide catalysts containing small amounts of added alkali‐metal oxides were mounted in the ionization chamber of a mass spectrometer equipped with a grid. The evaporation products obtained under various conditions were investigated. Alkali atom emission, the intensity of which decayed rapidly, and alkali ion emission were measured. The ratio of potassium ion emission to sodium ion emission from samples containing the two alkalis decreased markedly with heating time. The magnitude of the experimentally derived apparent work functions for evaporation of the alkali ions from the iron oxide catalysts agreed with those computed for the evaporation of the same ions from pure alkali metals.