Abstract
A novel family of lipophilic, photo-responsible supramolecular wires that contain 1D Fe(II) triazole complexes is developed. A triazole ligand 2 contains azobenzene group and it formed a 1D iron(II) complex Fe(2)3(BF 4)2, which is soluble in common organic solvents. Atomic force microscopy (AFM) of the sample in dilute chloroform solutions showed flexible molecular wires (length, 10 - 100 nm, width, ca. 7 nm). On the other hand, it formed aggregates and gave organogels when dispersed in chlorocyclohexane. The yellow chlorocyclohexane gel is liquefied by UV-irradiation and an orange-colored solution was obtained. This is ascribed to the trans-to-cis photoisomerization of azobenzene units, which is accompanied by morphological changes to undulated molecular wires. Visible-light illumination of the Fe(cw-2)3(BF4)2 complex reversibly afforded Fe(trans-2)3(BF4)2 complex, which is accompanied by physical gelation. Thus, the molecular wire of Fe(2) 3(BF4)2 show reversible conformational changes with maintaining the linear complex structures. This is the first example of photo-responsive 1D metal complexes which are dispersed in solution.
| Original language | English |
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| Pages | 3067-3068 |
| Number of pages | 2 |
| Publication status | Published - 2006 |
| Event | 55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama, Japan Duration: Sept 20 2006 → Sept 22 2006 |
Other
| Other | 55th Society of Polymer Science Japan Symposium on Macromolecules |
|---|---|
| Country/Territory | Japan |
| City | Toyama |
| Period | 9/20/06 → 9/22/06 |
All Science Journal Classification (ASJC) codes
- Engineering(all)