Abstract
| Original language | English |
|---|---|
| Pages (from-to) | OP345-OP352 |
| Number of pages | 7 |
| Journal | Advanced Optical Materials |
| Volume | 24 |
| Issue number | 44 |
| DOIs | |
| Publication status | Published - 2012 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- Azobenzene
- halogen bonding
- liquid crystals
- self-assembly
- supramolecular complexes
Cite this
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Photoalignment and surface-relief-grating formation are efficiently combined in low-molecular-weight halogen-bonded complexes. / Priimagi, A. (Corresponding Author); Saccone, M.; Cavallo, G.; Shishido, A. (Corresponding Author); Pilati, T.; Metrangolo, Pierangelo (Corresponding Author); Resnati, G. (Corresponding Author).
In: Advanced Optical Materials, Vol. 24, No. 44, 2012, p. OP345-OP352.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Photoalignment and surface-relief-grating formation are efficiently combined in low-molecular-weight halogen-bonded complexes
AU - Priimagi, A.
AU - Saccone, M.
AU - Cavallo, G.
AU - Shishido, A.
AU - Pilati, T.
AU - Metrangolo, Pierangelo
AU - Resnati, G.
PY - 2012
Y1 - 2012
N2 - 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.
AB - 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.
KW - Azobenzene
KW - halogen bonding
KW - liquid crystals
KW - self-assembly
KW - supramolecular complexes
U2 - 10.1002/adma.201204060
DO - 10.1002/adma.201204060
M3 - Article
VL - 24
SP - OP345-OP352
JO - Advanced Optical Materials
JF - Advanced Optical Materials
SN - 2195-1071
IS - 44
ER -