Estudo de condições da síntese para a obtenção da rede metalorgânica de Cu2+ contendo o ligante ácido 1,3,5-benzenotricarboxílico

Abstract

At the present work was evaluated the influence of Cu2+ salts counterions (acetate and chloride) and the synthesis conditions (temperature, time and concentration) on the reaction yield of MOF-199, a well-known metalorganic framework. Therefore, a factorial design was performed for this purpose in which three synthesis parameters were analyzed: temperature, time and Cu2+ concentration, varying in two levels (minimum and maximum), resulting in a combinatorial analysis, where each experiment consisted in a different configuration of the factors at their respective levels, which led to a batch of 23 = 8 experiments, for each counterion. Syntheses with average values of each reaction parameter were also performed, totalizing 9 syntheses for each counterion. The reaction product yield was the factorial design response variable. The products were characterized by infrared vibrational absorption spectroscopy, thermogravimetric analysis and powder X-ray diffraction. Analytical techniques confirmed the production of MOF-199. The temperature for syntheses with Cu2+ chloride was the only significant variable on the reaction yields. The syntheses carried out with Cu2+ acetate provided higher yields compared to Cu2+ chloride, however the synthesis conditions were not significant.