In the crystal structure of the title compound, 2C(8)H(6)O(4)·3C(20)H(22)N(4), there are three independent 2,2'-dimethyl-1,1'-(butane-1,4-di-yl)dibenzimidazole mol-ecules, each of which lies on an inversion centre. The terephthalic acid mol-ecules are linked to adjacent 2,2'-dimethyl-1,1'-(butane-1,4-di-yl)dibenzimidazole mol-ecules via O-H⋯N hydrogen bonds.

Chelating resin as a new copolymer for metal ions removal was prepared using 3-(4-hydroxyphenyl) cyclopropane-1,1,2,2-tetracarboxylic acid and 1,2-diaminoethane on the poly(styrene-alt-maleic anhydride). Parameters of sorption behavior were investigated under various conditions. Kinetics studies revealed that adsorption process confirmed pseudo-second-order kinetics data well fitted to Langmuir...

Water-soluble perylene tetracarboxylic acid bisimides (PBIs) with terminally linked polyglycerol dendrons of four different generations have been synthesized. These PBI dyes reveal a strong dendritic effect, enabling outstanding fluorescence quantum yields in water up to almost 100% for the highest dendron generation.

The Ni/P ratio of nickel phosphide has an important effect on the catalytic performance toward deoxygenation fatty acids to biofuel. Ni12P5 cluster is preferred model catalyst with butyric acid as reactant palmitic acid. mechanism over been theoretically investigated at GGA-PBE/DSPP, DNP level in dodecane solution. From acid, hydrodehydration predominated form n-butanal. Then, from n-butanal, l...

Acetylene-linked macrocycles incorporating multiple perylene tetracarboxylic acid bisimide (PBI) chromophores have been synthesised and separated by recycling GPC. The very first example of such macrocycles, i.e., cyclic trimer 5, containing three PBI dyes self-assembles into highly ordered donut-shaped unique hexagonal nanopatterns on HOPG surfaces as revealed by atomic force microscopy (AFM).

The reactions of N1,N2-Di-boc-1,2,4-triaminobutane with bridged dicarboxylic acids afford the corresponding bis-amides from which – after removal of the Boc groups – bis(N,N′-bidendate) ligands H2NCH2CH(NH2)(CH2)2NHCO-X-CONH(CH2)2CH(NH2)CH2NH2 can be obtained. New examples are the reactions of the triaminobutane with pyridine-2,6-dicarboxylic acid, with phenylene-1,4-diacetic acid, with terepht...