In recent years, a new type of micro-porous material, namely metal organic framework material, has received more and more attention from many basic and industrial fields because these materials possess unique advantages. In this work, through the powerful sonochemical preparation method, a three-dimensional cluster-based Cd II -MOFs, {[Cd(abtz) 2 (H 2 O) 2 ]·(ClO 4 ) 2 ·H 2 O} n ( 1 , abtz = 1-(4-aminobenzyl)-1H-1,2,4-triazole) can be quickly synthesized in the facile ultrasonic method. Powder X-ray diffraction (PXRD) measurement confirms that these bulky samples 1 (synthesized on different ultrasonic powers and ultrasonic time conditions) were pure . In addition, ultrasonic chemical time and irradiation power did not change the structure of composites materials 1 . SEM and morphological changes of 1 in the ultrasonic synthesis are also determined. Moreover, 1 exhibits good stability, the structure of 1 can be maintained not just in various solvents, and in aqueous environments with pH values from 2 to 12. Photo-luminescent experiment also reveals that complex 1 has the excellent application prospect as highly sensitive sensing material for the biomarker DPA (2,6-pyridine dicarboxylic acid) and 5-HT (5-hydroxytryptamine) through the photo-luminescence “turn-on” and “turn-off” effect, respectively. Further photo-luminescent measurements also show that different ultrasonic powers and ultrasonic time can effectively induce fluorescent sensing enhancement for biomarkers DPA and 5-HT based on the water stable clustered-based cadmium(II) coordination framework.
Graphical Cd-PLA was successfully synthesized with Cd (NO 3 ) 2 using flexible dicarboxylic acid and 4,4 ′-bipyridine as co-ligands. The bpy-containing ligand in Cd-PLA could enhance its photo-adsorption capacity. This enabled Cd-PLA presented high performance for photocatalysis of the benzylamine coupling reaction with high conversion rate and selectivity under mild conditions. This work can provide a new approach to design MOFs based on flexible ligands with photocatalytic activity. MOFs (Metal organic frameworks) have diverse structures that present great potential for light capture and light conversion. Therefore, MOFs are widely used in the study of photocatalysis. However, there still are some challenges in photocatalytic organic conversion upon MOFs under mild conditions, such as poor light absorption performance. Here, we successfully synthesized a new Cd-connected two-dimensional MOF by a simple hydrothermal method, termed [Cd(PLA)(4,4’-bipy) 0.5 ]⋅(DMF) (Cd-PLA) (PLA= phenylene-diacetic acid, 4,4’-bipy= 4,4’-bipyridine and DMF= N,N’-dimethyl formamide). The bpy-containing Cd-PLA possesses excellent light harvest ability and suitable photocatalysis energy potential, allowing it to be a remarkable photocatalyst with highly efficiency and selectivity for the photo-oxidation of benzylamine. This work provides an efficient, economical, and green way for oxidation of amines to produce imines under ultraviolet light irradiation.
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