14968-74-2Relevant articles and documents
A multiaxial molecular ferroelectric with record highTCdesigned by intermolecular interaction modulation
Li, Jun-Yi,Xu, Qiu-Ling,Ye, Si-Yu,Tong, Liang,Chen, Xiang,Chen, Li-Zhuang
, p. 943 - 946 (2021)
Through precise and ingenious molecular modification, we successfully obtained a multiaxial ferroelectric, [FEtDabco]ZnI3(N-fluoroethyl-N′-ZnI3-1,4-diazabicyclo[2.2.2]octonium), with a record highTc(540 K) among molecular ferroelectrics, which is promising for application under extreme thermal conditions.
Cell penetrating, mitochondria targeting multiply charged DABCO-cyanine dyes
Kurutos, Atanas,Orehovec, Iva,Safti?, Dijana,Horvat, Lucija,Crnolatac, Ivo,Piantanida, Ivo,Deligeorgiev, Todor
, p. 517 - 525 (2018)
We have prepared new series of lipophilic cyanine dyes equipped with several cationic quaternary ammonium moieties. This was achieved by introducing DABCO within the structures. Furthermore, to investigate the influence of the additional cationic charges on the cellular uptake, DABCO was quaternized with methyl group or alkyl piperidine cation. Spectroscopic and isothermal titration calorimetry studies as well as MTT assay and subcellular localization using confocal laser scanning microscopy revealed that some of the presented dyes combine low anti-proliferative effect with efficient cellular uptake, high affinity towards ds-DNA/RNA and remarkable fluorescent marking of mitochondria.
Simple and efficient synthesis of N-quaternary salts of quinuclidinium derivatives
Kazock, Jean-Yves,Taggougui, Mohamed,Carre, Bernard,Willmann, Patrick,Lemordant, Daniel
, p. 3776 - 3778 (2007)
The rapid and efficient synthesis of 1-alkylquinuclidinium (1-alkyl-1-azabicyclo[2.2.2]octane) and 1-alkyl-4-aza-1-azoniabicyclo[2.2.2] octane iodides are described. The products were characterized by 1H NMR spectra and elemental analysis. Georg Thieme Verlag Stuttgart.
Alkaline stability of quaternary ammonium cations for alkaline fuel cell membranes and ionic liquids
Marino,Kreuer
, p. 513 - 523 (2015)
The alkaline stability of 26 different quaternary ammonium groups (QA) is investigated for temperatures up to 160°C and NaOH concentrations up to 10 molL-1 with the aim to provide a basis for the selection of functional groups for hydroxide exchange membranes in alkaline fuel cells and of ionic-liquid cations stable in basic conditions. Most QAs exhibit unexpectedly high alkaline stability with the exception of aromatic cations. b-Protons are found to be far less susceptible to nucleophilic attack than previously suggested, whereas the presence of benzyl groups, nearby hetero-atoms, or other electron-withdrawing species promote degradation reactions significantly. Cyclic QAs proved to be exceptionally stable, with the piperidine-based 6-azonia-spiro[5.5]undecane featuring the highest half-life at the chosen conditions. Absolute and relative stabilities presented herein stand in contrast to literature data, the differences being ascribed to solvent effects on degradation.
Solid phase synthesis of metal-free perovskite crystalline materials
Lyu, Feiyi,Chen, Zhuo,Shi, Ruowen,Yu, Jiase,Lin, Bo-Lin
, (2021/09/14)
Metal-free perovskites, a new class of perovskite materials, show attractive piezoelectric, ferroelectric and pyroelectric properties because of their intrinsic structural properties. The introduction of organic components also leads to desirable properties such as structural adjustability, high mechanical flexibility, environmentally friendly processing conditions and low treatment temperatures. However, explorations of new metal-free perovskite materials suffer from the drawbacks of their previous liquid phase synthesis method, such as high time cost and poor experimental reproducibility. Here, we reported the first solid-phase synthesis of metal-free perovskite crystalline materials. Using the optimized ball milling method, we found that the starting materials were fully converted to pure metal-free perovskite DABCO-NH4Br3 (DABCO ?= ?N,N′-diazabicyclo [2.2.2] octonium) in the size of 5–10 ?μm. This solid phase synthesis strategy was successfully applied to the synthesis of MDABCO-NH4I3 (MDABCO ?= ?N-methyl-N′-diazabicyclo [2.2.2] octonium), demonstrating the great potential for the preparation and exploration of metal-free perovskite materials via solid phase synthesis.
