In the present work, we study and compare the structure and sensing properties of thin films of
unsubstituted palladium phthalocyanine (PdPc) and hexadecafluorosubstituted palladium
phthalocyanine (PdPcF16). Thin films of PdPc and PdPcF16 were obtained by the method of
organic molecular beam deposition and their structure was studied using UV-visible
spectroscopy, X-ray diffraction and atomic force microscopy techniques. The electrical sensor
response of PdPc films toward ammonia and hydrogen was investigated and compared with that
of PdPcF16 films. The nature of interaction between the phthalocyanines films and some gaseous
analyte molecules has been clarified using Quantum chemical (DFT) calculations.