| Title | Glycine-glutamic-acid-based organogelators and their fluoride anion responsive properties |
| Authors | Teng, Mingjun Kuang, Guichao Jia, Xinru Gao, Min Li, Yan Wei, Yen |
| Affiliation | Peking Univ, Beijing Natl Lab Mol Sci, Key Lab Polymer Chem & Phys, Minist Educ,Coll Chem & Mol Engn, Beijing 100871, Peoples R China. Drexel Univ, Dept Chem, Philadelphia, PA 19104 USA. |
| Keywords | FLUORESCENT ORGANOGELS SUPRAMOLECULAR GELS INDUCED GELATION LIQUID-CRYSTAL SOFT MATERIALS BEHAVIOR STIMULI CHEMOSENSOR DERIVATIVES MODULATION |
| Issue Date | 2009 |
| Publisher | 材料化学杂志 |
| Citation | JOURNAL OF MATERIALS CHEMISTRY.2009,19,(31),5648-5654. |
| Abstract | Novel low-molecular-weight organogelators (LMOGs) 1 and 2 derived from glycine-glutamic-acids (GGA) based dipeptide were synthesized. The difference on the chemical structures between 1 and 2 resulted in some interesting variations on their gelling behavior and fluoride anion (F(-)) responsive properties. Gelator 1 could gel aromatic solvents effectively, while gelator 2 possessed excellent gelation ability in protic solvents. Upon the addition of 0.5 equiv. F(-), the toluene gel of 1 transformed into solution due to the disruption of the intermolecular hydrogen-bonding, whereas the alcohol gel of 2 was stable and preserved even by introducing 20 equiv. F(-). Interestingly, 2 could be regarded as an efficient receptor for F(-) in acetonitrile (MeCN) solution. After the addition of F(-), the fluorescent emission band of 2 red-shifted from 360 to 420 nm with the emission intensity enhanced drastically; the intensity of the CD signal decreased and almost disappeared after addition of 2 equiv. F(-). These changes were due to the conformational change and hydrogen-bonding interaction between urea groups and F(-). The results indicated that GGA-based 1 and 2 might represent potential sensor materials for the naked-eye detection of F(-). |
| URI | http://hdl.handle.net/20.500.11897/151367 |
| ISSN | 0959-9428 |
| DOI | 10.1039/b904263f |
| Indexed | SCI(E) EI |
| Appears in Collections: | å å¦ä¸ å å å·¥ç¨ å¦é ¢ 高分子化学与物理教育部重点实验室 |
