Mass spectra of liquid crystals. III—phenylpyrimidine derivatives

Leclercq, PA Piet; Bogaert, HM van den

doi:10.1002/oms.1210260304

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…After mass spectra were acquired for all LCMs, chemical structures were elucidated following previous publications. Specifically, Leclercq et al reported mass spectra of various classes of LCM (35)(36)(37)(38)(39). By analyzing mass spectra, MS fragmentation pathways of LCMs were determined.…”

Section: Methodsmentioning

confidence: 99%

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Persistent, bioaccumulative, and toxic properties of liquid crystal monomers and their detection in indoor residential dust

Shi

Zhu

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

102

202

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Liquid crystal monomers (LCMs) are used widely in liquid crystal displays (LCDs), which are dramatically changing the world due to the provision of convenient communication. However, there are essentially no published reports on the fate and/or effects of LCMs in the environment. Of 362 currently produced LCMs, 87 were identified as persistent and bioaccumulative (P&B) chemicals, which indicated that these chemicals would exhibit resistance to degradation and exhibit mobility after entering the environment. Following exposure to mixtures of LCM collected from 6 LCD devices, significant modulation of 5 genes,CYP1A4,PDK4,FGF19,LBFABP, andTHRSP, was observed in vitro. Modulation of expressions of mRNAs coding for these genes has frequently been reported for toxic (T) persistent organic pollutants (POPs). In LCM mixtures, 33 individual LCMs were identified by use of mass spectrometry and screened for in 53 samples of dust from indoor environments. LCMs were detectable in 47% of analyzed samples, and 17 of the 33 LCMs were detectable in at least 1 sample of dust. Based on chemical properties, including P&B&T of LCMs and their ubiquitous detection in dust samples, the initial screening information suggests a need for studies to determine status and trends in concentrations of LCMs in various environmental matrices as well as tissues of humans and wildlife. There is also a need for more comprehensive in vivo studies to determine toxic effects and potencies of LCMs during chronic, sublethal exposures.

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Section: Methodsmentioning

confidence: 99%

“…4 and SI Appendix, Fig. S5) (35)(36)(37)(38)(39). Mass spectra of LCMs 5, 9, 13, 16, 31, and 33 have been published previously (35,40).…”

Section: Investigation Of Toxicity Of Mixtures Of Lcm From Current-usmentioning

confidence: 99%

Persistent, bioaccumulative, and toxic properties of liquid crystal monomers and their detection in indoor residential dust

Shi

Zhu

et al. 2019

Proc. Natl. Acad. Sci. U.S.A.

102

202

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Mass spectra of liquid crystals. IV—diphenylethyne derivatives (nematic tolans)

Leclercq

Bogaert

1991

Org. Mass Spectrom.

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Mass spectra of liquid crystals. V.—cyclohexyl and phenyl esters of cyclohexanecarboxylic and benzole acids

Leclercq

Bogaert

1991

Org. Mass Spectrom.

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Mass spectra of liquid crystals. III—phenylpyrimidine derivatives

Abstract: The 70 eV electron impact mass spectra of 34 l-phenyl-2,5pyrimidine derivatives are presented. Based on the observed mass shifts by the various substituents, the nature of the main fragment ions is rationalized.

Cited by 4 publications

References 4 publications

Persistent, bioaccumulative, and toxic properties of liquid crystal monomers and their detection in indoor residential dust

Persistent, bioaccumulative, and toxic properties of liquid crystal monomers and their detection in indoor residential dust

Mass spectra of liquid crystals. IV—diphenylethyne derivatives (nematic tolans)

Mass spectra of liquid crystals. V.—cyclohexyl and phenyl esters of cyclohexanecarboxylic and benzole acids

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