FEATURES OF GAS-SENSIBILITY OF DYES ON THE BASE OF 4-VALENCE STANNUM COMPLEXES

Abstract

Aim: Regularity detecting of possible sensitivity of nanoparticles ensemble of dyes on the base of 4-valence stannum complexes to presence of ammonia or HCl vapour in environment.Research methods: Analysis of photoluminescence spectra of specimens with posterior summarizing of obtained experimental results and using the literary data and analogies with results of previous researching.Results of researching: It’s found, that the nanoparticles ensemble of dyes containing the benzoyl type amine substituent in the hydrazone fragment sharp and stably decreases its luminescence intensity about in half after placing into ammonia atmosphere. The initial luminescence intensity may be restored after annealing only. Probably this result is connected with formation of bridge bonds inside the pores of matrix by ammonia molecules. On the other hand, the nanoparticles ensemble of dyes containing the hydroxyl type amine substituent is sensitive to the HCl vapour. They reduce their luminescence intensity about three times due to redistribution of negative charge in system. However, specified changes have a place with some latent period. The initial luminescence intensity also may be restored after annealing in this case.Conclusion: There is certain selectivity of gas sensitivity of investigated dyes. The dyes containing amine substituent are sensitive to ammonia and insensitive to HCl vapour. The dyes containing hydroxyl substituent are sensitive to HCl vapour and insensitive to ammonia. So it’s promise to use as an indicated luminescence gas sensor both systems simultaneously. If it will need, every one snaps into action to appropriate gas.