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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Yu, Xudong Liu, Qian Cao, Xinhua Zhang, Song Wang, Qi Chen, Liming Wu, Junchen Yi, Tao Zhang, Mingming |
| Description | Author Affiliation: Yu X ( Department of Chemistry and Laboratory of Advanced Materials, Fudan University, 220 Handan Road, Shanghai 200433, China.) |
| Abstract | Two new peptide-based isomers containing cholesterol and naphthalic groups have been designed and synthesized. We found that the position of L-alanine in the linker could tune the gelation properties and morphologies. The molecule with the L-alanine residue positioned in the middle of the linker (1 b) shows better gelation behavior than that with L-alanine directly linked to the naphthalimido moiety (1 a). As a result, a highly thermostable organogel of 1 b with a unique core–shell structure was obtained at high temperature and pressure in acetonitrile. Moreover, the gels of 1 a and 1 b could undergo an instantaneous gel-to-gel transition triggered by sonication. Ultrasound could break the core–shell microsphere of 1 b and the micelle structure of 1 a into entangled fibers. By studying the mechanism of the sonication-triggered gel-to-gel transition process of these compounds, it can be concluded that ultrasound has a variety of effects on the morphology, such as cutting, knitting, unfolding, homogenizing, and even cross-linking. Typically, ultrasound can cleave and homogenize π-stacking and hydrophobic interactions among the gel molecules and then reshape the morphologies to form a new gel. This mechanism of morphology transformation triggered by sonication might be attractive in the field of material storage and controlled release. |
| ISSN | 09476539 |
| e-ISSN | 15213765 |
| Journal | Chemistry - A European Journal |
| Issue Number | 30 |
| Volume Number | 16 |
| Language | English |
| Publisher | Wiley-VCH;ChemPubSoc Europe |
| Publisher Date | 2010-08-09 |
| Publisher Place | Germany |
| Access Restriction | Open |
| Subject Keyword | Alanine Analogs & Derivatives Cholesterol Chemical Synthesis Gels Chemistry Naphthalenes Peptides Sonication Microscopy, Electron, Scanning Models, Molecular Molecular Structure Research Support, Non-U.S. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Catalysis |
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