Novel family of liquid crystals based on a known biheterocyclic pigment material: mesomorphic derivatives of 2,5-dihydropyrrolo [3,4-c]pyrrole-1,4-dione

References

• CHANDRASEKHAR , S. , NAIR , G. G. , RAO , S. S. , PRASAD , S. K. , PRAEFCKE , K. and BLUNK , D. 1997 . Liq. Cryst. , 24 : 67 – 70 . Part 107 on liquid crystalline compounds; part 106:
   Web of Science ®Google Scholar
• FARNUM , D. , METHA , G. , MOORE , G. and SIEGAL , F. 1974 . Tetrahedron Lett. , 15 : 2549
   Google Scholar
• POTRAWA , T. and LANGHALS , H. 1987 . Chem. Ber. , 120 : 1075
   Google Scholar
• CLOSS , F. and GOMPPER , R. 1987 . Angew. Chem. , 99 : 564 1987; CLOSS, F., and GOMPPER, R., 1987, Angew. Chem. Int. Ed. Engl., 26, 552
   Google Scholar
• IQBAL , Z. A. , JOST , M. , KIRCHMAYR , R. , PFENNINGER , J. , ROCHAT , A. and WALLQUIST , O. 1988 . Bull. Soc. Chim. BeIg. , 97 : 615 and patents cited therein
   Google Scholar
• LANGHALS , H. and POTRAWA , T. 1990 . Chimia , 44 : 62
   Google Scholar
• CHAN , W.‐K. , CHEN , Y. , PENG , Z. and YU , L. 1993 . J. Amer. ehem. Soc. , 115 : 11735
   Web of Science ®Google Scholar
• EDMAN , P. , JOHANSSON , L. B.‐A. and LANGHALS , H. 1995 . J. phys. Chem. , 99 : 8504 and references cited therein
   Web of Science ®Google Scholar
• BAO , Z. , CHAN , W.‐K. and Yu , L. 1995 . J. Amer. ehem. Soc. , 117 : 12426
   Web of Science ®Google Scholar
• PARTRIDGE , M. W. 1949 . 4-Alkoxybenzonitriles . J. chem. Soc. , 3043 SCHUBERT, H., and ZASCHKE, H., 1970, J. prakt. Chem., 312, 494. The other five arylnitriles used here in our DPPD liquid crystal syntheses are commercially available, e.g. from E. Merck, Darmstadt, Germany
   Google Scholar