252Cf-PDMS of chlorophyll photoreaction center models

Abstract

Chemically modified chlorophylls and porphyrins have been studied by ²⁵²Cf-plasma desorption mass spectrometry (PDMS). The ²⁵²Cf-PDMS spectra of thin films show intense molecular ions and fragmentation from whicn we make reasonable assignments for compound identification. The ²⁵²Cf-PDMS of two compounds, bis(10-hydroxybutoxy-methyl pheophorbide $\text{a}$)-1,4-dichlorophtalate and linear bis(tetraphenylporphyrin) are discussed.