TY - JOUR
T1 - Hydrogen bond-driven columnar self-assembly of electroluminescent D-A-D configured cyanopyridones
AU - Vinayakumara, D. R.
AU - Ulla, Hidayath
AU - Kumar, Sandeep
AU - Pandith, Anup
AU - Satyanarayan, M. N.
AU - Rao, D. S.Shankar
AU - Prasad, S. Krishna
AU - Adhikari, Airody Vasudeva
N1 - Funding Information:
The authors are thankful to NITK, Surathkal and the SCM group, RRI, Bangalore, India, for providing necessary laboratory facilities. The authors are also thankful to Dr Vijayaragha-van for recording the NMR spectra, and Dr Srinivasa H. T. and Mrs Vasudha for their technical support. H. Ulla acknowledge DST-SERB, India (NPDF Award No. PDF/2016/000711), for the financial support.
Publisher Copyright:
© 2018 The Royal Society of Chemistry.
PY - 2018
Y1 - 2018
N2 - Herein, we report the design and synthesis of a new series of flying bird-shaped liquid crystalline (LC) cyanopyridone derivatives with a D-A-D architecture, CPO-1 to CPO-4. Their mesomorphic, photophysical, electrochemical, and electroluminescence characteristics have been investigated in detail. Here, the H-bonding interactions through a central lactam core were shown to be the key driving force for their self-assembly into columnar mesophases. The key role of H-bonding has been confirmed by using newly synthesized similar shaped compounds, MCP-1 to MCP-3. New CPO mesogens were found to be intense greenish blue light emitters with narrow band-gap energies. Conclusions were drawn based on theoretical studies also. Finally, the application potential of the selected mesogen CPO-2 as an emissive material has been demonstrated for the fabrication of doped and non-doped OLED devices with different device architectures, which displayed encouraging results. In fact, this is the first report on the use of emissive H-bond-assisted columnar liquid crystals in devices. The present results provide a new guideline and a versatile approach to the design of new LC molecules for the fabrication of efficient OLEDs.
AB - Herein, we report the design and synthesis of a new series of flying bird-shaped liquid crystalline (LC) cyanopyridone derivatives with a D-A-D architecture, CPO-1 to CPO-4. Their mesomorphic, photophysical, electrochemical, and electroluminescence characteristics have been investigated in detail. Here, the H-bonding interactions through a central lactam core were shown to be the key driving force for their self-assembly into columnar mesophases. The key role of H-bonding has been confirmed by using newly synthesized similar shaped compounds, MCP-1 to MCP-3. New CPO mesogens were found to be intense greenish blue light emitters with narrow band-gap energies. Conclusions were drawn based on theoretical studies also. Finally, the application potential of the selected mesogen CPO-2 as an emissive material has been demonstrated for the fabrication of doped and non-doped OLED devices with different device architectures, which displayed encouraging results. In fact, this is the first report on the use of emissive H-bond-assisted columnar liquid crystals in devices. The present results provide a new guideline and a versatile approach to the design of new LC molecules for the fabrication of efficient OLEDs.
UR - https://www.scopus.com/pages/publications/85049849036
UR - https://www.scopus.com/pages/publications/85049849036#tab=citedBy
U2 - 10.1039/c8tc01737a
DO - 10.1039/c8tc01737a
M3 - Article
AN - SCOPUS:85049849036
SN - 2050-7534
VL - 6
SP - 7385
EP - 7399
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 27
ER -