Abstract
It is demonstrated that halogen bonding can be used to construct low-molecular-weight supramolecular complexes with unique light-responsive properties. In particular, halogen bonding drives the formation of a photoresponsive liquid-crystalline complex between a non-mesogenic halogen bond-donor molecule incorporating an azo group, and a non-mesogenic alkoxystilbazole moiety, acting as a halogen bond-acceptor. Upon irradiation with polarized light, the complex exhibits a high degree of photoinduced anisotropy (order parameter of molecular alignment >0.5). Moreover, efficient photoinduced surface-relief-grating (SRG) formation occurs upon irradiation with a light interference pattern, with a surface-modulation depth 2.4 times the initial film thickness. This is the first report on a halogen-bonded photoresponsive low-molecular-weight complex, which furthermore combines a high degree of photoalignment and extremely efficient SRG formation in a unique way. This study highlights the potential of halogen bonding as a new tool for the rational design of high-performance photoresponsive suprastructures.
Original language | English |
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Pages (from-to) | OP345-OP352 |
Number of pages | 8 |
Journal | Advanced Materials |
Volume | 24 |
Issue number | 44 |
DOIs | |
Publication status | Published - 20 Nov 2012 |
Publication type | A1 Journal article-refereed |
Keywords
- LIQUID-CRYSTALLINE POLYMERS
- DIRECTIONAL PHOTOFLUIDIZATION LITHOGRAPHY
- AZOBENZENE MATERIALS
- SUPRAMOLECULAR MATERIALS
- BLOCK-COPOLYMER
- AZO POLYMER
- HYDROGEN
- FILMS
- PHOTOORIENTATION
- MOTIONS