(2020). Synthesis and characterization of fluorine doped tin oxide nanoparticle: An efficient catalyst for the preparation of 14-aryl-14H dibenzo [a,j]xanthene under free organic solvents conditions. test, 47(1), 22-30. doi: 10.21608/mjcc.2020.412864
. "Synthesis and characterization of fluorine doped tin oxide nanoparticle: An efficient catalyst for the preparation of 14-aryl-14H dibenzo [a,j]xanthene under free organic solvents conditions". test, 47, 1, 2020, 22-30. doi: 10.21608/mjcc.2020.412864
(2020). 'Synthesis and characterization of fluorine doped tin oxide nanoparticle: An efficient catalyst for the preparation of 14-aryl-14H dibenzo [a,j]xanthene under free organic solvents conditions', test, 47(1), pp. 22-30. doi: 10.21608/mjcc.2020.412864
Synthesis and characterization of fluorine doped tin oxide nanoparticle: An efficient catalyst for the preparation of 14-aryl-14H dibenzo [a,j]xanthene under free organic solvents conditions. test, 2020; 47(1): 22-30. doi: 10.21608/mjcc.2020.412864

Synthesis and characterization of fluorine doped tin oxide nanoparticle: An efficient catalyst for the preparation of 14-aryl-14H dibenzo [a,j]xanthene under free organic solvents conditions

Mansoura Journal of Chemistry
Volume 47, Issue 1, February 2020, Pages 22-30    PDF (1.26 M)
Document Type: Original Article
DOI: 10.21608/mjcc.2020.412864
Abstract
Stannic oxide SnO2 nanoparticles were tailored using sol-gel approach, in which stannic chloride pentahydrate SnCl4.5H2O utilized as an inexpensive starting material. The obtained gel is dried then calcined at 450oC to form tetragonal SnO2 structure (6.0 - 8.2 nm). The obtained powders are doped with different loading 10-55 wt. % of HF as a source of fluoride ion, followed by calcination at 200, 300 and 400oC. The surface acidity is examined for the fabricated samples with nonaqueous potentiometric titration versus n-butyl amine in acetonitrile. Surface acidity measurement results indicate that 45F-Sn contains the strongest acid sites. The calcination temperature 200oC is the ideal appropriate temperature for calcination at that the overall surfaces acidity and the acid strength reach to their maximum values. The catalytic efficiency was examined via solvent-free synthesis of 14-aryl-14H dibenzo [a,j] xanthene. 45F-Sn calcined at 200oC shows the highest catalytic activity and gives an excellent yield about 95.63%. 
Keywords
Tin oxide; Hydrofluoric acid; Nanoparticles; Surface acidity; Xanthenes
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