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Table of Content

    15 January 2015, Volume 33 Issue 1
    2015, 33(1):  0-0. 
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    2015, 33(1):  1-2. 
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    From Supramolecular Polymers to Supramolecular Organic Frameworks: Engineering the Periodicity of Solution-phase Self-assembled Architectures
    WAN Tangqing, LI Zhanting
    2015, 33(1):  3-14.  DOI: 10.7517/j.issn.1674-0475.2015.01.003
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    Formation of periodic networks by molecular building blocks in solution has been a challenge in supramolecular chemistry and self-assembly field. It has been well-established that multitopic building blocks with three or four binding sites can generate supramolecular polymers in solution driven by intermolecular noncovalent interactions. Increasing the rigidity of multitopic building blocks can enhance the preorganization of their binding sites, strengthen the cooperativity and multivalency of intermolecular non-covalent interactions, and increase the ordering or periodicity of their self-assembled architectures. This account summarizes some of the important advance in the construction of supramolecular polymers from multitopic building blocks and our effort in creating two-dimensional (2D) supramolecular organic frameworks (SOFs)-a new family of solution-phase periodic self-assembled networks.

    Application of Photochemistry in Regulation and Exploration in Molecular Self-assembly
    WANG Andong, YAN Yun, HUANG Jianbin
    2015, 33(1):  15-27.  DOI: 10.7517/j.issn.1674-0475.2015.01.015
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    Photochemical changes which induced by light irradiation is an ideal method to provide energy and external stimuli to microscopic systems via macroscopic means. This method is plays an important role in the research area of molecular self-assembly. By using photochemical methods multi-level regulation to the molecular self-assemblies can be realized from molecular level to microscopic structure, and finally macroscopic properties. On the other hand, the luminescence of aggregates can be controlled by regulating the assembly structure and the molecular arrangement via other methods. After all, molecular fluorescence probes provide vigorous supports to explore the imformations of the nanometer-scaled molecular self-assemblies which is an important method in research of self-assembled structures. In this paper, we review the above areas of application of photochemical methods in regulation and exploration of molecular self-assembly and the aggregate structure-related luminescence changes.

    Preparation, Property and Application of Honeycomb Porous Films on the Interface
    KONG Li, HAO Jingcheng
    2015, 33(1):  28-48.  DOI: 10.7517/j.issn.1674-0475.2015.01.028
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    We reviewed the status of the honeycomb porous structures formed by polymers and nanoparticles via breath figure method. When moist air blows into the surface of polymer or an organic nanoparticles solution on surfaces, the solvent evaporates resulting in water droplets condensed on surface of the liquid and rearrange into hexagonal array. After the solvent and water droplets evaporate completely, the polymer or nanoparticles form into a hexagonal honeycomb structures on substrate. This technology is a major advance in the field of self-assembly, and it is likely to get important applications in the areas of biotechnology, tissue engineering, micro-imaging technology, high-end separation technology and medicine. In this short review we systematically discusses the preparation of regular honeycomb porous structures, the forming materials, formation mechanism and factors (including humidity, concentration, air flow direction and velocity, solvent, base curvature etc.). The properties and application of honeycomb porous films, finally its application in the field of chemistry and materials science is presented.

    Photochemical Reaction in Supramolecular Gels
    WANG Xiufeng, YANG Dong, LIU Minghua
    2015, 33(1):  49-66.  DOI: 10.7517/j.issn.1674-0475.2015.01.049
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    Photochemical reaction in supramolecular gels with photoactive groups is a special kind of reaction, which combines the superiority of supramolecular gels and photochemical reactions effectively to build new functional materials. Then, this kind of supramolecular gels will have a broad application prospects in optical information storage, optical switching devices, and so on. This article review the recent development of photochemical reaction in supramolecular gels, involved in the application in multiple-stimulus responsive gel, chiral optical switches and chiral synthesis.

    Surface Chemically Assembly of Calix[4]arene and Its Utilization in the Development of a Fluorescence Sensing Film for THF
    MA Ying, YU Chunmeng, LIU Ke, CAI Xiuqin, ZHANG Shaofei, FANG Yu
    2015, 33(1):  67-76.  DOI: 10.7517/j.issn.1674-0475.2015.01.067
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    Volatile organic compounds (VOCs) are major components of atmospheric pollutants which are harmful to human being. In this work, a novel di-urea bridged calix[4]arene derivative ended with siloxane was designed and synthesized. The compound was then utilized for the modification of pre-cleaned glass plate surface, and in this way, a substrate with a layer of calix[4]arene was fabricated. Upon dip-coating a fluorescent compound, pyrenyl derivative of terthiophene (Py-3T), onto the substrate surface, a fluorescence "turn-on" film sensor for THF in vapor phase was developed. It was demonstrated that the film is highly sensitive to the presence of THF vapor (DL, 26.7 μg/mL), and the sensing is fast and reversible. With exception of benzene and toluene, other commonly found organic liquids and chemicals show little effect upon the sensing. It is believed that the film may have real-life uses in THF sensing.

    A Label-free Fluorometeric Method for Screening the G-quadruplex and Thrombin Based on Aggregation-induced Emission
    WANG Ming, ZHANG Guanxin, ZHANG Deqing
    2015, 33(1):  77-83.  DOI: 10.7517/j.issn.1674-0475.2015.01.077
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    The positively chargedsilole derivative, 1-Methyl-1-(3-trimethylamino)propyl-2,3,4,5-tetraphenylsilole iodide, can differentiate single strand DNA andG-quadruplex by modulating its aggregation and fluorescence emissionwith the binding of DNA.A new label-free fluorescence method for G-quadruplex and thrombin detection was further established by making use of the aggregation-induced emission feature of the silole derivative.

    Binding Characteristic of Imidazolium Ionic Liquid with Bovine Serum Albumin
    DING Yuanhua, CUI Jian, DAI Tuosu, GUO Rong
    2015, 33(1):  84-97.  DOI: 10.7517/j.issn.1674-0475.2015.01.084
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    In the present work, UV-Vis spectroscopy, fluorescence spectroscopy, synchronous fluorescence spectroscopy, circular dichroism spectroscopy(CD), attenuated total refraction-fourier transform infrared spectroscopy(ATR-FTIR), negative staining-transmission electron microscopy, light scattering and isothermal titration calorimetry (ITC) were used to study the binding characteristics between bovine serum albumin and a typical imidazolium ionic liquid(IL), 1-butyl-3-methylimidazolium chloride ([Bmim]Cl). The results showed that the addition of [Bmim]Cl would make the UV absorption intensity of BSA increased and also lead to static fluorescence quenching. Synchronous fluorescence results suggested that [Bmim]Cl molecules mainly interact with the region which is close to the tryptophan residues of BSA, so that made the conformation and internal hydrophobic structure changed. Negative staining-transmission electron microscopy directly showed that the change of protein-IL complex structure after adding the ionic liquid. From circular dichroism and ATR-FTIR results, it was found that ionic liquid also produced a much stronger impact to α-helix, β-fold of BSA, which led to changes in protein secondary structure. Finally, ITC and surface tension methods indicated that the above interaction were driven by the electrostatic interaction and hydrophobic interaction, however, the hydrophobic interaction between the alkyl chain of IL and the internal hydrophobic microstructure of BSA was the main driving force.