Synthesis of conductive polymer alloys by electrochemical polymerization in chiral liquid crystal

Komaba, Kyoka; Jo, Tomoaki; Kumai, Reiji; Goto, Hiromasa

doi:10.1080/10601325.2022.2138765

Cited by 2 publications

(1 citation statement)

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“…Fluorine enhances stability, reduces viscosity, and improves electro-optical properties of LCMs . F-LCMs are more prevalent than NF-LCMs in the LCD panels of televisions (TVs), smartphones, and computers. , Applications of LCMs have evolved rapidly due to their significance in altering digital display technology in electronic devices. − The global production of organic light emitting diode (OLED) and LCD is forecasted to reach 450 million m 2 in 2025 . Disposal of electric and electronic waste, including screens and monitors, can be a major source of environmental release of LCMs.…”

Section: Introductionmentioning

confidence: 99%

Concentrations, Profiles, and Potential Sources of Liquid Crystal Monomers in Residential Indoor Dust from the United States

Liu,

Kannan

2024

Environ. Sci. Technol.

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Liquid crystal monomers (LCMs) are biphenyl-or cyclohexane-based organic chemicals used in electronic digital displays, and several of them possess bioaccumulative and toxic properties. Little is known about their occurrence in indoor dust from the United States. We analyzed 60 LCMs in 104 residential indoor dust samples collected from 16 states across the United States. Forty-seven of 60 LCMs were detected in dust samples at a median ∑LCM concentration of 402 ng/g (range: not detected to 4300 ng/g). Trans-4-propylcyclohexyl trans,trans-4′-propylbicyclohexyl-4-carboxylate (MPVBC) and (trans,trans)-4-fluorophenyl 4′-pentyl-[1,1′-bi-(cyclohexane)]-4-carboxylate (FPeBC) were frequently detected in dust samples. We investigated potential sources of LCMs in dust by determining concentrations and profiles of these chemicals in smartphone screens, desktop and laptop computer monitors, and displays of other electronic devices and found that profiles in smartphones matched closely with those found in dust. The calculated median daily intake of ∑LCM through dust ingestion was 1.19 ng/kg bw/d for children, whereas that through dermal absorption was 0.18 ng/kg bw/d for adults in the United States.

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