Synthesis and characterization of new thiophene--benzimidazole-based electrochromes

Abstract

In the present study, two new donor-acceptor-donor-type molecules were synthesized and the electro-optical properties of the resulting monomers and their corresponding polymers were investigated. Thiophene was selected as the donor unit and cycloheptyl-and cyclooctyl-substituted benzimidazoles were used as the acceptor units. The synthesized monomers and their electrochemically obtained polymers were characterized using cyclic voltammetry and UV-Vis spectrometry. The optical band gap values of the polymers were 1.62 eV and the polymer films changed color to gray upon oxidation, while they were brick red in their neutral states. Moreover, changing the ring size on the acceptor group from seven carbon to eight carbon did not result in any differences in the electrochemical or optical properties of the resulting polymers. Moreover, the effect of the acceptor unit was also investigated by comparing the polymers in this work with other polymers bearing thiophene and benzimidazole.

Metal-free oxidative synthesis of benzimidazole compounds by dehydrogenative coupling of diamines and alcohols

“…Substituted benzimidazole derivatives have significant biological activities, such as acidic and salt-forming abilities, due to their unique fused structure, benzene ring and imidazole ring. 1 They are widely used in the pharmaceutical industry as therapeutic agents, antimicrobials, antihypertensive agents, antidiabetic agents, anticancer agents and antitumor agents. 2 Many drugs that exhibit significant activity against viruses such as HIV, herpes (HSV-1), or influenza contain the benzimidazole motif in the molecule.…”

Development of bioactive 2-substituted benzimidazole derivatives using an MnOx/HT nanocomposite catalyst

“…[1][2][3][4][5][6][7][8][9][10][11] They also have potent biological significance against some viruses such as herpes (HSV-1), influenza, and HIV due to their unique fused ring structure, imidazole ring, and benzene ring. 12,13 The acidic and salt-forming abilities of benzimidazole are also the reason for its biological activeness. Substituted benzimidazoles are intermediates in synthetic chemistry and are also used as ligands in asymmetric catalysis.…”