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41.
MA Juan & GAO QingYu College of Chemical Engineering China University of Mining Technology Xuzhou China 《中国科学B辑(英文版)》2011,(9)
The control effect of recycled noise,generated by the superposition of a primary Gaussian noise source and a secondary source with a constant delay,has been studied in an excitable FitzHugh-Nagumo system.We mainly focus on the performance of noise-induced spike and coherence resonance in a parameter region sub-threshold to supercritical Hopf bifurcation.For fixed noise intensity,simulations show that the coherence(quantitatively measured by R,which is defined as the mean value of the spike interval time T n... 相似文献
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Xuzhou Yuan Qiaoqiao Mu Songlin Xue Yanhui Su Yanlei Zhu Hao Sun Zhao Deng Yang Peng 《Journal of Energy Chemistry》2021,(9):202-208
The implementation of metal organic frameworks(MOFs)as the co-catalysts in hybrid photocatalytic systems puts requirements on both their charge-carrying capabil... 相似文献
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设G是一个图,若对于图G的任一条边e,G-e都存在一个分数k-因子,则称G是一个分数k-消去图.若k=2,则称分数k-消去图为分数2-消去图.本文证明了当bind（G）≥2,并且δ（G）≥3时,G是分数2-消去图. 相似文献
44.
Xuzhou Tian Jiyao Sheng Shitong Zhang Shengbing Xiao Ying Gao Haichao Liu Bing Yang 《Molecules (Basel, Switzerland)》2021,26(15)
Deep blue luminescent materials play a crucial role in the organic light-emitting diodes (OLEDs). In this work, a novel deep blue molecule based on hybridized local and charge-transfer (HLCT) excited state was reported with the emission wavelength of 423 nm. The OLED based on this material achieved high maximum external quantum efficiency (EQE) of 4% with good color purity. The results revealed that the locally-excited (LE)-dominated HLCT excited state had obvious advantages in short wavelength and narrow spectrum emission. What is more, the experimental and theoretical combination was used to describe the excited state characteristic and to understand photophysical property. 相似文献
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Dr. Guangfeng Li Dr. Zhixuan Zhou Chang Yuan Zhewen Guo Yuhang Liu Dr. Dong Zhao Dr. Kai Liu Jun Zhao Prof. Hongwei Tan Prof. Xuzhou Yan 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2020,132(25):10099-10103
Herein, the trackable supramolecular transformation of a two-component molecular cage to a three-component cage through supramolecular fusion with another two-component molecular square is described. The use of tetraphenylethene (TPE), a chromophore with aggregation-induced emission (AIE) character, as a component for the molecular cages enables facile fluorescence monitoring of the transformation process: while both cages exhibit fluorescence emission via the restriction of intramolecular motion of the TPE motif, the interactions between TPE and 4,4′-bipyridine introduced in the supramolecular fusion process result in partial fluorescence quenching and shifts in the emission maximum. This study provides a simple and efficient approach towards complex supramolecular cages with emergent functions and demonstrates that AIE features could provide unique opportunities for the characterization of complex, dynamic supramolecular transformation processes. 相似文献
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1.IntroductionSelf-assembly is a topic of intense scientific interest,as demonstrated by the inclusion of \"How far can we push chemical self-assembly\" in the T... 相似文献
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Host–guest complexation between a dibenzo-24-crown-8-based cryptand and a paraquat derivative was studied. Subsequently, two novel [2]rotaxanes based on the dibenzo-24-crown-8-based cryptand/paraquat recognition motif were prepared by threading-followed-by-stoppering method and single-pot method, respectively. The obtained mechanically interlocked structures were confirmed by 1H NMR, 13C NMR, 2D NMR, and ESI-MS. 相似文献
49.
Zhaoming Zhang Lin Cheng Jun Zhao Lei Wang Kai Liu Wei Yu Xuzhou Yan 《Angewandte Chemie (International ed. in English)》2020,59(29):12139-12146
Nature has engineered delicate synergistic covalent and supramolecular polymers (CSPs) to achieve advanced life functions, such as the thin filaments that assist in muscle contraction. Constructing artificial synergistic CSP materials with bioinspired mechanically adaptive features, however, represents a challenging goal. Here, we report an artificial CSP system to illustrate the integration of a covalent polymer (CP) and a supramolecular polymer (SP) in a synergistic fashion, along with the emergence of notable mechanical and dynamic properties which are unattainable when the two polymers are formed individually. The synergistic effect relies on the peculiar network structures of the SP and CPs, which endow the resultant CSPs with overall improved mechanical performance in terms of the stiffness, strength, stretchability, toughness, and elastic recovery. Moreover, the dynamic properties of the SP, including self‐healing, stimuli‐responsiveness, and reprocessing, are also retained in the CSPs, thus leading to their application as programmable and tunable materials. 相似文献
50.
WANG KeQuan & FAN QiuBo College of Mathematics Physics Xuzhou Institute of Technology Xuzhou China 《中国科学G辑(英文版)》2009,52(9):1307-1312
We seek to analyze a three-level cascade laser with a pair of nonlinearly coupled waveguides inside the cavity. Applying the
pertinent master equation, we investigate the squeezing and entanglement properties intracavity produced by our system. It
is shown that with the help of nonlinearly coupled waveguides highly squeezed as well as macroscopic entangled light with
high intensity can be achieved.
Supported by the Natural Science Youth Teacher Foundation of Xuzhou Institute of Technology (Grant No. XKY2007317) 相似文献