Supramolecular receptors from α-amino acid-derived lipids
作者:Hiroshi Hachisako、Yutaka Murata、Hirotaka Ihara
DOI:10.1039/a903956b
日期:——
were investigated. The L- or D-glutamic acid-derived lipids with glutaric acid headgroups aggregated to form specific hydrophobiccavities which exhibited inclusion ability for the styryl dyes mainly based on the planarity recognition. The formation of such specific hydrophobiccavities can be achieved not only by introducing amide groups capable of complementary hydrogen bondings between neighbouring
制备了衍生自L-,D-,DL-谷氨酸,L-天冬氨酸,L-赖氨酸,L-鸟氨酸和L -2,4-二氨基丁酸的阴离子脂质,以及与结构相关的溶剂化阳离子苯乙烯基苯乙烯的方法研究了将染料掺入这些脂质聚集体中的方法。的大号-或d具有戊二酸头基的β-谷氨酸衍生的脂质聚集形成特定的疏水腔,其主要基于平面性识别而表现出对苯乙烯基染料的包涵能力。这样的特定疏水腔的形成不仅可以通过在聚集体中引入能够与相邻脂质之间互补的氢键结合的酰胺基,而且可以通过将适当的间隔基亚甲基引入例如戊二酸酯头基来实现。还发现氨基酸残基的侧链亚甲基在特定的疏水腔以及间隔基亚甲基的形成中起重要作用。还为适当设计的L-赖氨酸和L形成了此类腔-鸟氨酸来源的脂质。这些结果表明,特异性掺入不是谷氨酸来源的脂质所特有的,而是来自适当设计的L-氨基酸来源的脂质的聚集体的普遍现象。在组装的方式的差异大号之间谷氨酸残基大号- , - d -异构体,和DL
A Biomimetic Supramolecular Approach for Charge Transfer between Donor and Acceptor Chromophores with Aggregation‐Induced Emission
作者:Jing‐Yu Chen、Gajanan Kadam、Akhil Gupta、Anuradha、Sheshanath V. Bhosale、Fei Zheng、Chun‐Hua Zhou、Bao‐Hua Jia、Dipak S. Dalal、Jing‐Liang Li
DOI:10.1002/chem.201803158
日期:2018.10
very low concentrations of the AIE chromophores, indicating that the rotation of their aromatic cores is restricted in the gel network. In tertiary gels, the fluorescence of the donorchromophore can be efficiently reduced by the acceptorchromophore through a combination of static and dynamic quenching process, via charge transfer from the donor to the acceptor. This work demonstrates a convenient
A new C60-based low-molecular weight gelator (LMWG 1) with a L-glutamid-derived lipid unit was synthesized and characterized. LMWG 1 can gel toluene, p-xylene and benzene. Moreover, its gelation ability can be further enhanced by addition of an exTTF derivative (compound 2), for which the intermolecular interaction between the C60 unit in 1 and the exTTF unit in 2 is responsible based on the absorption and NOE difference 1H-NMR spectral studies. Additionally, gelation-induced CD signals are observed for the gel with LMWG 1 and that of LMWG 1 doped with compound 2. Further studies indicate that the self-assembly structures of LMWG 1 in the gel phases can be modulated by the addition of compound 2. In addition, the self-assembly of LMWG 1 in DMSO leads to spherical particles of several microns in size, and the surfaces of these spherical particles are hierarchically structured with nano-fibers. Moreover, the thin-film of spherical particles exhibits water-repellent hydrophobicity.