[EN] FLUOROUS METAL CHELATES COMPOSITIONS<br/>[FR] COMPOSITIONS DE CHÉLATES MÉTALLIQUES FLUORITIQUES
申请人:THE REGENTS OF THE UNIVEFISITY OF CALIFORNIA
公开号:WO2020118307A1
公开(公告)日:2020-06-11
This disclosure provides compositions of SALTAME core containing compounds and associated methods for use in tracking cells by magnetic resonance imaging (MRI), computed tomography (CT), positron emission tomography (PET), and related methods.
Process for controlling cone tilt angle in mixtures of smectic liquid
申请人:Minnesota Mining and Manufacturing Company
公开号:US05928562A1
公开(公告)日:1999-07-27
A process for controlling the cone tilt angle of a tilted smectic liquid crystal composition comprises the step of combining (a) at least one liquid crystal composition comprising at least one smectic or latent smectic liquid crystal compound comprising (i) an aliphatic fluorocarbon terminal portion comprising a terminal fluoroalkyl or fluoroether group and an alkylene group having at least two carbon atoms and containing at least one catenary ether oxygen atom, (ii) an aliphatic hydrocarbon terminal portion, and (iii) a central core connecting the terminal portions; and (b) at least one liquid crystal composition comprising at least one smectic or latent smectic liquid crystal compound; with the provisos that at least one of the compositions (a) and (b) comprises at least one chiral liquid crystal compound and that the combining of compositions (a) and (b) provides an optically active, tilted chiral smectic liquid crystal composition. The process enables control of cone tilt angle and thereby control of the brightness characteristics of liquid crystal display devices.
作者:Xiaobai Wang、Qun Ye、Jing Song、Ching Mui Cho、Chaobin He、Jianwei Xu
DOI:10.1039/c4ra15108a
日期:——
A series of fluorinatedpolyhedraloligomericsilsesquioxane (POSS) derivatives were prepared via hydrosilylation reaction and they were characterized by 1H, 13C, 29Si and 19F nuclear magnetic resonance (NMR) spectroscopy and elemental analysis. The thermal stability of POSS derivatives was studied using thermogravimetric analysis (TGA) and they exhibited high decomposition temperatures ranging from