title: Bay-Annulated Perylene Tetraesters: A New Class of Discotic Liquid Crystals.
abstract: Selenium-annulated perylene tetraesters that stabilize the hexagonal columnar phase have been synthesized and characterized, and their thermal and photophysical behavior has been determined. The mesophase range decreased with an increase in chain length. A comparative account of the structure-property relationships of this series of compounds with respect to parent perylene tetraesters, N- and S-annulated perylene tetraesters, in terms of their thermal, photophysical and electrochemical behavior is provided. The bay-annulation of perylene tetraesters is a good option to modify the thermal and photophysical properties of perylene derivatives and it can provide a new avenue for the synthesis of several technologically important self-assembling perylene derivatives.
authors.affiliation: Department of Chemistry, Indian Institute of Technology Guwahati, 781039, Guwahati, Assam, India.
authors.forename: Ravindra Kumar
authors.initials: RK
authors.lastname: Gupta
authors.affiliation: Department of Chemistry, Indian Institute of Technology Guwahati, 781039, Guwahati, Assam, India.
authors.forename: Suraj Kumar
authors.initials: SK
authors.lastname: Pathak
authors.affiliation: Department of Chemistry, Indian Institute of Technology Guwahati, 781039, Guwahati, Assam, India.
authors.forename: Balaram
authors.initials: B
authors.lastname: Pradhan
authors.affiliation: Deparment of Chemical Sciences, Sector-81, Indian Institute of Science Education and Research, Mohali, 140306, Knowledge City, Manauli, Punjab, India.
authors.forename: Monika
authors.initials: M
authors.lastname: Gupta
authors.affiliation: Deparment of Chemical Sciences, Sector-81, Indian Institute of Science Education and Research, Mohali, 140306, Knowledge City, Manauli, Punjab, India.
authors.forename: Santanu Kumar
authors.initials: SK
authors.lastname: Pal
authors.affiliation: Department of Chemistry, Indian Institute of Technology Guwahati, 781039, Guwahati, Assam, India. achalkumar78@gmail.com.
authors.forename: Achalkumar Ammathnadu
authors.initials: AA
authors.lastname: Sudhakar
keywords: annulation; chalcogens; mesophases; self-assembly; semiconductors