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361.
Ze-Jiu Diao Si-Yi Liu Hui Wen Dr. Guoliang Liu Tao Yang Jing-Jing Li Prof. Xiao-Qin Liu Prof. Lin-Bing Sun 《Angewandte Chemie (International ed. in English)》2023,62(21):e202301739
Stimuli-responsive porous materials have captured much attention due to the on-demand tunable properties. Most reported stimuli-responsive porous materials are based on molecule isomerism or host-guest interaction, and it is highly desired to develop new types based on different responsive mechanism. Herein, inspired by natural cells which have the ability to fuse and divide induced by external stimulation, we report a new type of stimuli-responsive porous material based on detachment mechanism. A detachable porous organic polymer, namely DT-POP-1, is fabricated from the polymerization of anthracene-containing monomer (AnMon) when irradiated by 365 nm UV light. DT-POP-1 can detach into the monomer AnMon when irradiated with 275 nm UV light or heat. Such polymerization/detachment is reversible. The detachment results in a big difference in porosity and adsorption capacity, making the present detachable porous polymer highly promising in adsorptive separation and drug delivery. 相似文献
362.
A selective protocol for the synthesis of either α-ketoamides or quinoxaline derivatives under the same reaction conditions has been achieved simply by varying substitution number of amino-groups. The method features metal-free, room temperature and broad substrate scopes as well as no extra oxidant. This process applies to various substituent groups and gives products in moderate to good yield. Finally, a rational mechanism was proposed. 相似文献
363.
Yanling Wang Huan Ge Disha Wang Huan He Lu Li Yanyan Diao Zihao Shen Lili Zhu Shiliang Li Zhenjiang Zhao Honglin Li 《中国化学》2019,37(12):1259-1263
Macrocycle has attracted the attention of many researchers in the field of medicinal chemistry due to its unique advantages and good prospects, but the difficulties in drug design and synthesis of macrocycle limit its applications. In this study, a series of macrocyclic derivatives designed from anaplastic lymphoma kinase (ALK) inhibitor lorlatinib were synthesized as Janus kinase 2 (JAK2) selective inhibitors. Among them, 17f had the best inhibitory activity (IC50 = 0.177 μmol·L–1) and selectivity for JAK2 over JAK1 and JAK3, which indicated that design of the macrocyclic derivatives might be a feasible strategy for the discovery of novel selective JAK2 inhibitors. 相似文献
364.
365.
Xiang Xu Man Jiang Diao Li Ruiduo Wang Zhaoyu Ren Jintao Bai 《Optical and Quantum Electronics》2018,50(1):39
A passively Q-switched microsecond Er-doped fiber laser at 1532 nm wavelength was demonstrated by using a ReS2-based saturable absorber. The absorber was fabricated with ReS2 by exfoliating mechanically and transferred onto a fiber end. Stable Q-switched laser pulses were observed with the shortest pulse duration of 2.1 μs, the maximum average output power of 2.48 mW, and the pulse with energy up to 38 nJ. Our experimental results suggest that ReS2 is potential for a Q-switcher near 1.55 μm wavelength. 相似文献
366.
X. H. Liu C. Wang X. F. Duan Y. Q. Wang G. J. Liu F. Y. Diao P. Yang J. P. Zhang 《Crystal Research and Technology》2016,51(8):498-502
CdTe0.67Se0.33 nanocrystals were synthesized using a typical organic route. Two major morphologies are observed from transmission electron microscopy (TEM) images, one being a tripod, and the other being a tripod‐like with a black dot in the center of the nanocrystal. The nanocrystals have two distinct geometrical shapes, one being a tripod, and the other being a tetrapod. High‐resolution TEM (HRTEM) examinations show that the tetrapod nanocrystals consist of a zinc‐blende nucleus and four wurtzite arms connected through a common facet, whereas the tripod nanocrystals result from the coalescence of three zinc‐blende nanorods. These results are helpful to interpret the growth process of other II–VI semiconductor NCs. 相似文献
367.
In this paper, under the genericity condition, we study the condition estimation of the total least squares (TLS) problem based on small sample condition estimation (SCE), which can be incorporated into the direct solver for the TLS problem via the singular value decomposition (SVD) of the augmented matrix [A, b]. Our proposed condition estimation algorithms are efficient for the small and medium size TLS problem because they utilize the computed SVD of [A, b] during the numerical solution to the TLS problem. Numerical examples illustrate the reliability of the algorithms. Both normwise and componentwise perturbations are considered. Moreover, structured condition estimations are investigated for the structured TLS problem. 相似文献
368.
Hanzhi Diao 《PAMM》2017,17(1):757-758
We present the application of the generalised convolution quadrature (gCQ) technique to the time domain boundary element method (BEM) which solves the retarded potential boundary integral equation (RPBIE). Our result allows to employ the multi-stage Runge-Kutta method as the time stepping scheme for the generalised convolution quadrature which is used in the time domain BEM for acoustic problems in either a bounded three-dimensional domain or in its unbounded exterior. (© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
369.
A digital photographic study of pool boiling with R11 was performed on a horizontal transparent heater at pressure at 0.1 MPa.
A high-speed digital camera was applied to record the bubble behaviors of boiling process. The departure diameter, departure
time, and nucleation site density at different heat flux were obtained. From the video images, it can be concluded that evaporation
of microlayer is very important to the growth of bubble. It was also observed that there is not any liquid replenished into
the microlayer below the bubble. In addition, bubble growth curve and dry-out area growth curve could be determined by analyzing
the images. Based on the experimental result, boiling curve for R11 was predicted by using the dynamic microlayer model. As
a result, the agreement between the predictions and the experiment data is good at high heat flux. 相似文献
370.
Simultaneous determination of trace migration of phthalate esters in honey and royal jelly by GC–MS 下载免费PDF全文
Jinhui Zhou Yitao Qi Hongmei Wu Qingyun Diao Feifei Tian Yi Li 《Journal of separation science》2014,37(6):650-657
A simple, rapid, and reliable liquid–liquid extraction coupled to GC–MS method was developed and validated for the quantification of 22 phthalate esters (PAEs) in honey and royal jelly. Instrument parameters for GC–MS were tested to obtain the satisfactory separation between 22 PAEs with high sensitivity. The extraction procedure was optimized in order to achieve the best recovery. The following criteria were used to validate the developed method: linearity, LOD, lower LOQ, precision, accuracy, matrix effect and carry‐over. Correlation coefficients were >0.999 by applying the linear regression model based on the least‐squares method with a weighting factor (1/x). The intra‐ and interday precision were within 12.7% in terms of RSD, and the accuracy was within ?11.8% in terms of relative error. The mean extraction recoveries ranged between 80.1 and 110.9% for honey and royal jelly. No significant matrix effect and carry‐over for PAEs were observed for the analysis of honey and royal jelly samples. A total of 20 real samples were analyzed for a mini‐survey using the developed method. Seven PAEs in honey samples and five PAEs in royal jelly samples were found, indicating potential contamination with several PAEs. 相似文献