Narrow Results

The synthesis and characterization of new alkali-soluble osmium tetraphenylporphyrinates, complexes of the 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin Os(tH₄cpp)L₂ and Os(tH₄cpp)LL' (2a–j), is described. 2a–j are obtained from the corresponding new osmium porphyrinates Os(tmecpp)L₂ and Os(tmecpp)LL'(1a–k) by alkaline saponification and precipitation with hydrochloric acid. In fact, the osmium(II) porphyrinates 2c–f as well as 2i–j are oxidized to the osmium(III) porphyrinates Os(tH₃cpp)L₂(3c–f) and Os(tH₃cpp)LL'(3i–j) in the presence of air, as confirmed by UV-vis spectroscopy.

In this study, the level density parameter and the gamma ray strength function effects on photoneutron reaction cross-section calculations for Osmium isotopes were investigated by employing available level density models and gamma ray strength functions within Talys v1.8 and Empire v3.1 nuclear codes. A relative variance analysis was done to determine the best gamma ray strength function. Then, the effect of level density models for the photoneutron reactions was investigated by using the best gamma ray strength function. The results were compared with each other and also with the experimental data taken from the literature.