89697-97-2Relevant academic research and scientific papers
Ordered mesogenic units-containing hyperbranched star liquid crystal all-solid-state polymer electrolyte for high-safety lithium-ion batteries
Wang, Shi,Wang, Ailian,Liu, Xu,Xu, Hao,Chen, Jie,Zhang, Liaoyun
, p. 213 - 224 (2018)
Functional liquid crystal polymers have attracted much attention as new all-solid-state polymer electrolytes due to their ability of orientation. In this paper, a hyperbranched star liquid crystal polymer (HSLCP) electrolyte for lithium-ion batteries (LIBs) is developed for the first time. This type of HSLCP bears a hyperbranched poly(glycidol) (HPG) as core, poly-ε-caprolactone (PCL) and poly (4-cyano-biphenyl methylmethacrylate) ((LC)x) compose the block arms of the HSLCP. (LC)x segments, one part of the arms, are assisted to promote transmission of Li-ion via orientation and PCL segments are used to dissociate lithium salt and efficiently migrate charge carriers. The good self-standing all-solid-state polymer electrolyte film composed of HSLCP and lithium bis(trifluoromethanesulfonimide (LiTFSI) can be formed by solution casting method. It is demonstrated that such a HSLCP exhibits good thermal stability (368°C), the HSLCP-based electrolyte shows high ionic conductivity (5.98 × 10?5 S cm?1 at 30°C), outstanding ion transference number (0.63), and wide electrochemical window (5.12 V). In addition, LiFePO4/Li batteries employing the electrolyte deliver good cycling performance and rate capability. Simultaneously, the corresponding half-cell can still power a LED lamp at room temperature. Thus, this is a great progress for liquid crystal-based polymer electrolytes to be applied to high energy LIBs.
A simple but effective fluorescent probe with large stokes shift for specific detection of cysteine in living cells
Chen, Song,Hou, Peng,Wang, Jing,Fu, Shuang,Liu, Lei
, p. 7 - 12 (2018/05/29)
A novel 4′-hydroxybiphenyl-4-carbonitrile-based fluorescent probe, 1, for selective detection of cystein (Cys) over homocystein (Hcy) and glutathione (GSH) was developed. This probe had simple structure and could be easily synthesized with good yield from commercially available materials. Moreover, probe 1 showed a remarkable large Stokes shift (180 nm) and displayed a rapid (5 min) and highly sensitive response (the detection limit was 0.15 μM) for Cys with fluorescence turn-on signal changes (142-fold fluorescence enhancement). Importantly, probe 1 could be used to detect and image both exogenous and endogenous Cys in living A549 cells.
Fast synthesis employing a microwave assisted neat protocol of new monomers potentially useful for the preparation of PDLC films
Barros, M. Teresa,Mouquinho, Ana I.,Petrova, Krasimira T.,Saavedra, Mara D.,Sotomayor, Joao C.
experimental part, p. 557 - 566 (2012/04/10)
It has been repor ted that the length of the molecular chain and the rigidity of molecules influence the structure of the polymer network in PDLC films and hence the electro-optical proper ties of the composites. Herein, a series of new aromatic monomeric monomethacrylates, bismethacrylates and monovinylbenzene derivatives with a mesogenic core were successfully synthesized under microwave irradiation. The microwave assisted synthesis resulted in decreased reaction times, reduced solvent requirement, increased operational simplicity, and in most cases, improved yields and selectivity. Versita Sp. z o.o.
