共查询到19条相似文献,搜索用时 62 毫秒
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新型大环化合物的设计与合成一直以来都是超分子化学的研究热点。冠醚、环糊精、杯芳烃和葫芦脲等经典大环分子,以及柱芳烃等新兴大环分子的发展丰富了超分子化学的研究内容。其中,官能团功能化的大环化合物被广泛应用于化学传感器、分子机器、仿生系统、超分子催化、刺激响应体系、功能材料以及药物传递等众多领域。葫芦脲大环具有一个刚性的疏水空腔,由于其独特而优秀的水相识别能力而备受关注。然而,相对于其他大环化合物,葫芦脲由于其官能团功能化难题而发展相当缓慢。近年来,葫芦脲大环官能团功能化的研究获得了巨大的突破,将葫芦脲大环的主客体识别性质从传统的超分子化学拓展到生物化学、材料化学以及药物化学等交叉研究领域。本文重点总结葫芦脲大环官能团功能化现阶段的研究进展,并对其合成方法进行简单明晰的总结与展望。 相似文献
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在特定外界刺激下, 修饰于介孔纳米材料表面的超分子纳米阀门可以有效地控制所包封物质如药物模型分子、 抗癌药物分子和寡核酸等生物分子的靶向释放, 在药物释放、 基因转染及传感等领域有广泛的应用前景. 本文结合本课题组的工作, 综述了国内外在基于大环合成受体的超分子纳米阀门体系的化学构筑及功能等方面的研究进展. 相似文献
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具有聚集诱导发光性质化合物的发展不仅很大程度上解决了传统有机分子发色团在高浓度、固态或者薄膜等形式的聚集状态下荧光猝灭的问题,而且扩展了有机发色团在荧光探针、传感器以及细胞成像等方面的应用。其中,四苯乙烯及其衍生物作为具有聚集诱导发光性质的典型化合物已被广泛应用在材料化学、生物化学等相关研究领域。受此启发,超分子化学家也将这类具有聚集诱导发光性质的四苯乙烯及其衍生物作为研究对象引入到超分子化学的领域,特别是利用大环主体与四苯乙烯客体通过主客体相互作用有效地限制了荧光客体分子的分子内转动或运动,增强了这类超分子体系的发光强度,并为其在刺激响应性传感器、智能探针等方面提供了新思路。本文总结了近年来涉及四苯乙烯衍生物与大环主体通过主客体相互作用形成聚集诱导发光超分子体系的发展,并按照大环主体进行分类简要介绍其应用。 相似文献
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受中国化学会、国家自然科学基金委员会委托,洛阳师范学院、河南省化学会承办的《全国第十三届大环化学暨第五届超分子化学学术讨论会》拟于2006年8月11日至15日在九朝古都洛阳召开。会议旨在交流我国近年来在大环化学和超分子化学领域的研究成果,研讨我国大环化学、超分子化学及相关领域在21世纪的发展。会议期间将特别邀请国内外这一领域知名教授作相关学术报告,并安排大会报告、分组报告、墙报展等学术交流活动。 相似文献
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水污染问题目前已成为世界上最为紧迫的环境问题之一.全氟烷基和多氟烷基物质(PFASs)因其具有高毒性、持久性、生物积累性、远距离迁移性等性质,对人类健康和生态环境产生了严重的危害.开发PFASs的检测和去除技术成为了当今社会的关注重点.超分子大环材料作为一类新兴的多功能材料,具有丰富的主客体分子识别、良好的环境适应性和结构的可设计性等优点.超分子大环材料的可设计性赋予其特定的多功能性,使其成为同时检测和去除环境水中PFASs的理想平台.本文综述了超分子大环及其衍生物在检测和吸附去除PFASs中的应用,首先对常见的PFASs分类进行了介绍,接下来探讨了具有PFASs高吸附效率的特定超分子结构类别及相关吸附机理.最后介绍了超分子吸附剂再生的方法.同时也为具有改进PFASs去除性能的下一代功能超分子材料的设计提供了一些见解. 相似文献
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气相色谱中的超分子化学问题:Ⅰ.气相色谱与超分子化学的关系 总被引:1,自引:3,他引:1
超分子化学是有关超分子体系结构和功能的化学,超分子体系是由多个分子作用联系起来的实体,分子识别是形成超分本系的基本特征,本文从分子识别的角度,探讨了气相色谱学中超分子化学问题,并详细地评述了冠醚、液晶、环表固定液的分子识别机理的研究状况,最后,作者们大致展望了色谱研究超分子问题的前景,并且认为在多人工作基础上会产生一门新科学-超分子色谱学。 相似文献
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Dr. Michael Duss Dr. Miguel A. Soto Dr. Brian O. Patrick Prof. Mark J. MacLachlan 《Chemistry (Weinheim an der Bergstrasse, Germany)》2022,28(54):e202200862
Ring-opening metathesis polymerization (ROMP) of strained macrocycles is a key method to prepare diverse polymers. However, lack of ring strain in most macrocycles is an impediment to polymerization. In this paper, the polymerization/oligomerization of unstrained macrocycles was achieved using a supramolecular approach, leading selectively to cyclic products. Diphenyl thiourea and other guest molecules were used as additives to the ROMP reaction of unstrained macrocycles. An intermediate host-guest complex leads to the stabilization of the open form of the macrocycle after treatment with Grubbs catalysts, thereby favoring polymerization by inhibiting the ring-closing reaction back to the monomer. This proof-of-concept enables ring-expansion polymerization of unstrained macrocycles leading to cyclic polymers with molecular weights up to 6700 Da. 相似文献
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A series of large macrocyclic calixarene bishydrazones were efficiently synthesized by [2+2] condensation reactions of calix[4]arene 1,3‐disubstituted aldehydes with hydrated hydrazine. The X‐ray single crystal diffraction showed that macrocycles form a distinctive calixtube‐liking shape. 相似文献
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Kaidi Xu Zhi‐Yuan Zhang Chengmao Yu Bin Wang Ming Dong Xianqiang Zeng Rui Gou Lei Cui Chunju Li 《Angewandte Chemie (International ed. in English)》2020,59(18):7214-7218
Reported here is a molecule‐Lego synthetic strategy for macrocycles with functional skeletons, involving one‐pot and high‐yielding condensation between bis(2,4‐dimethoxyphenyl)arene monomers and paraformaldehyde. By changing the blocks, variously functional units (naphthalene, pyrene, anthraquinone, porphyrin, etc.) can be conveniently introduced into the backbone of macrocycles. Interestingly, the macrocyclization can be tuned by the geometrical configuration of monomeric blocks. Linear (180°) monomer yield cyclic trimers and pentamers, while V‐shaped (120°, 90° and 60°) monomers tend to form dimers. More significantly, even heterogeneous macrocycles are obtained in moderate yield by co‐oligomerization of different monomers. This series of macrocycles have the potential to be prosperous in the near future. 相似文献
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The decoration of SWNTs with supramolecular motifs is a common strategy for their subsequent noncovalent functionalization. However, due to the lack of a standard methodology, there are no quantitative measurements showing the extent to which the supramolecular equilibria are affected by one of the host-guest couple being anchored to the SWNT. Here, we use a method we initially developed to quantify association of small organic molecules to the walls of SWNTs to compare association constants of two host-guest systems, a Hamilton receptor-cyanuric acid derivative and a crown ether-ammonium couple, in solution and when the host is covalently attached to the SWNTs. Our data show that association does occur, but the stability of the complexes is significantly affected, as reflected in a sizable reduction in their association constant, when compared to solution. 相似文献
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超分子化学起源于主客体化学,其发展亦很大程度上依赖于主客体化学。而大环受体分子作为主客体化学重要组成部分在有机功能材料的构筑方面已逐渐显示出其无穷的魅力。在过去的几十年里,科研工作者们深入研究了包括冠醚、环糊精、杯芳烃、葫芦脲、柱芳烃在内的多种有机超分子主体化合物。其中,柱芳烃作为一种新型的易官能化的主体分子,由于其独特的刚性柱状结构和优良的物理、化学性质日益受到广泛关注。它为有机功能材料的制备以及超分子化学的发展提供了更多可能。到目前为止,基于柱芳烃的有机功能材料已在分子识别、细菌病毒抑制、农药检测、重金属离子识别、光传感、纳米粒子的稳定、催化、生物传感及药物控释等多个领域得到运用。本文结合这些材料现阶段的研究进展,对其在上述领域的应用进行简单明晰地总结与展望。 相似文献
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R. Krishna Kumar Israel Diskin-Posner Israel Goldberg 《Journal of inclusion phenomena and macrocyclic chemistry》2000,37(1-4):219-230
Eight new crystalline materialsbased on ligand-bridged dimers of either Zn(II)- orCo(II)-tetraphenylporphyrins have been prepared andcharacterized by X-ray diffraction analysis. These supramolecular entities have a ``wheel-and-axle' typeshape, the elongated bidentate ligands1,3-diaminopropane, 1,4-diaminobutane, 4,4'-bipyridyl, 1,2-bis(4-pyridyl)ethene or1,2-bis(4-pyridyl)ethane coordinating axially on bothsides to the metal centers of the porphyrin species. They vary from one another by the length of the ligandspacer, the distance between the two porphyrincomponents ranging from 9.4 Å to 14.0 Å. Theintermolecular organization in these structures ischaracterized by a similar chain motif in whichadjacent oligomeric units interlock into one another. In spite of the steric constraint imposed by thebridging ligand, this packing preserves the typicalcorrugated stacked arrangement of the porphyrinframeworks which has been commonly observed inclathrates of monomeric tetraarylporphyrins. It alsoinduces in most cases large voids between theinterlocked motifs, causing enclathration of solventmolecules in the crystal lattice. The experimentallyestablished geometries of these oligomers and theircrystal packing modes provide useful information forfurther crystal engineering efforts of polymericmultiporphyrin domains. 相似文献
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Dihua Dai Dr. Jie Yang Prof. Ying-Wei Yang 《Chemistry (Weinheim an der Bergstrasse, Germany)》2022,28(8):e202103185
The fabrication of new supramolecular materials for real-time detection of analytes including ions, organic pollutants, gases, biomolecules, and drugs is of pivotal importance in industrial manufacture, clinical treatment, and environmental remediation. Incorporating fluorescent molecules with distinct aggregation-induced emission (AIE) effects into supramolecular assemblies has received much attention over the past two decades, owing to the remarkable performance of the AIE-active supramolecular materials in sensing and detection. In this minireview, we summarize the recent progress of superior detection systems on the basis of supramolecular assemblies accompanied with AIE features. We envision that this minireview will be helpful and timely for relevant researchers to stimulate new thinking for constructing new AIE-based supramolecular materials with advanced architectures for effective sensing and detection. 相似文献