48071-54-1Relevant articles and documents
Rational design, synthesis and evaluation of new azido-ester structures as green energetic plasticizers
Fareghi-Alamdari, Reza,Sheibani, Nasser,Zohari, Narges
supporting information, p. 12695 - 12706 (2020/10/02)
Computer-aided molecular design (CAMD) is a well-known tool for the theoretical assessment of chemical structures before their experimental synthesis. In this study, we used this method to consider the important criteria for a chemical structure as an energetic plasticizer for an energetic azido binder. The number of new azido-ester structures were initially designed, and their physicochemical and energetic properties were determinedviatheoretical calculation by molecular dynamics simulations and machine learning-based methods. Considering the balances between several criteria, two of these theoretical chemical structures (including GTAA (glyceryl tris(azidoacetate)) and TEGBAA (triethyleneglycol bis(azidoacetate))) were then selected, synthesized, and characterized. The comparison of experimental and theoretical results to evaluate the physicochemical properties of these new azido-ester plasticizers showed an acceptable agreement between the two methods. Finally, the compatibility and efficiency of these two new azido-ester plasticizers on the rheological and thermal properties of glycidyl azide polymer (GAP) were investigated using rheometry and DSC analyses, and compared with some common energetic plasticizers. The results confirmed that these two new azido-esters are appropriate plasticizers for GAP since they exhibited higher safety over comparable plasticizers, in addition to the real performance.
Bis-biphenylacrylonitrile bridged with crown ether chain: A novel fluorescence sensor for Fe3+in aqueous media
Guo, Hongyu,Ma, Haifeng,Wu, Rongqin,Xiong, Jie,Yang, Fafu
supporting information, p. 11746 - 11751 (2020/07/28)
The design and synthesis of novel fluorescence sensors for Fe3+ in aqueous media have important prospects for practical applications. In this work, the novel bis-biphenylacrylonitrile bridged with crown ether chains 3a-3c were prepared in yields of 73-80%. Compounds 3a-3c exhibited high fluorescence in aqueous media based on the AIE effect. The sensing abilities for a series of metal ions suggested that the compound 3b possessed the selective detection for Fe3+ in aqueous media with strong fluorescence quenching. The detection limit of compound 3b for Fe3+ was 1.67 × 10-7 M and the sensing mechanism was proposed with the assistance of 1H NMR and MS studies. Compound 3b displayed excellent fluorescence imaging properties with a sensing ability for Fe3+ in living cell systems, indicating the good application prospect for sensing Fe3+ in aqueous media and complex environments. This journal is
A novel fluorescence sensor for K+ based on bis-Bodipy: The ACQ effect controlled by cation complexation of pseudo crown ether ring
Yan, Zhenxi,Lin, Xiaoru,Guo, Hongyu,Yang, Fafu
, p. 3064 - 3068 (2017/07/17)
Three novel bis-Bodipy 3a–3c bridged with crown ether chain were prepared in yields of 70–78%. Their complexation absorption and fluorescent spectra for fourteen metal ions suggested that compound 3b exhibited the selective response for K+ with
Antibacterial activities of five cationic gemini surfactants with ethylene glycol bisacetyl spacers
Guo, Shengnan,Sun, Xiaowen,Zou, Qichao,Zhang, Jinzhi,Ni, Hong
, p. 1089 - 1097 (2015/02/19)
A series of cationic gemini surfactants containing two dimethylalkylammonium chains linked by ethylene glycol bisacetyl spacers were synthesized [G m-AnA-m, G = gemini surfactant, m = 12 (-C12H25), 14 (-C14H29), or 16 (-C16H33), A = acetyl, and n = 2, 3, or 4 is the number of ethylene glycol units in the spacers]. Because of the inductive effect of the oxygen atom in the spacer, acylation can take place using chloroacetyl chloride instead of bromoacetyl bromide which helps to limit the use of environmentally harmful reagents. Critical micelle concentrations were determined using conductivity measurements. The antibacterial activities of the surfactants against Gram-positive bacterium Staphylococcus aureus and Gram-negative bacterium Escherichia coli were evaluated from the minimum inhibitory concentration (MIC), minimum bacterial concentration, a time-kill study, and the inhibitory zone. Increasing the length of the spacer did not result in an obvious change of antibacterial activity. However, increasing the length of the alkyl chain apparently increased the antibacterial activity against S. aureus but decreased the antibacterial activity against E. coli. The G12-A2A-12 surfactant had the lowest CMC of 1.26 mmol L-1 and exhibited the best antibacterial activity with a MIC of 32 μg mL-1 toward S. aureus and 64 μg mL-1 toward E. coli in the presence of 105 CFU of bacteria. This work indicated that these cationic gemini surfactants have potential applications as antibacterial agents and emulsifiers.
Synthesis of Artificial Receptors having Uracil Base Pairs Linked Through Spacers Containing Ether and Ester Moieties
Kumar, Subodh,Paul, Dharam,Singh, Harjit
, p. 580 - 582 (2007/10/03)
2,4-Bis(trimethylsilyloxy)pyrimidine and appropriately functionalized dihalides in refluxing 1,2-dichloroethane provide respective α,ω-bis(uracil-1-yl)alkane derivatives (60-65%).
