Langmuir and Langmuir-Blodgett films of low-bandgap polymers was written by Braunger, Maria L.;Assuncao da Silva, Edilene;Awada, Hussein;de Oliveira, Vinicius J. R.;Silva, Hugo Santos;Begue, Didier;Hiorns, Roger C.;Lartigau-Dagron, Christine;Olivati, Clarissa de Almeida. And the article was included in Polymer International in 2018.Quality Control of Bis(2-iodothiophen-3-yl)methanone This article mentions the following:
Low-bandgap conjugated polymers have provided a considerable increase in organic photovoltaic efficiencies, however, an understanding of class-specific nanostructures, necessary to further improve device qualities, remains scarce. Their self-assembly and associated electronic behaviors in Langmuir-Blodgett (LB) films are used here to provide relationships specific to each polymer, clarifying their structure-property characteristics. The behavior of two low-bandgap polymers based on cyclopentadithiophene (PCPDTBT) and dithienosilole (Si-PCPDTBT) units in the Langmuir trough were investigated and it is shown that it is possible to fabricate nanostructured films of low-bandgap polymers on solid substrates with the LB deposition technique. The polymers were mixed with amphiphilic mols. at well-defined concentrations to improve the formation of the LB films. The polymers were also deposited by drop-casting and LB techniques onto interdigitated electrodes to evaluate their elec. properties, and the LB films were characterized for their optical and morphol. properties. It was found that both LB and drop-cast films of PCPDTBT showed higher elec. conductivities than those of Si-PCPDTBT. Importantly, LB films resulted in higher elec. conductivities – by an order of magnitude – compared to their equivalent mixtures with stearic acid in drop-cast films, although drop-cast films without stearic acid gave higher conductivities. This fine-tuning of the mol. architectures of the films is thus demonstrated to directly affect the phys. properties and may lead to an improvement in device efficiencies in future applications. © 2018 Society of Chem. Industry. In the experiment, the researchers used many compounds, for example, Bis(2-iodothiophen-3-yl)methanone (cas: 474416-61-0Quality Control of Bis(2-iodothiophen-3-yl)methanone).
Bis(2-iodothiophen-3-yl)methanone (cas: 474416-61-0) belongs to iodide derivatives. Iodide-containing intermediates are common in organic synthesis, because of the easy formation and cleavage of the C–I bond. Polyiodoorganic compounds are sometimes employed as X-ray contrast agents, in fluoroscopy, a type of medical imaging. This application exploits the X-ray absorbing ability of the heavy iodine nucleus.Quality Control of Bis(2-iodothiophen-3-yl)methanone
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com