Related Experiment Video
Updated: Jan 29, 2026

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
Published on: November 30, 2020
Preferential Face-on and Edge-on Orientation of Thiophene Oligomers by Rational Molecular Design
Tanwistha Ghosh1,2, Shinji Nagasawa3, Neethi Raveendran1
1Photosciences and Photonics Section, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, 695 019, India), .
Abstract:
Precise control over the supramolecular organization of organic semiconducting materials guiding to exclusive face-on or edge-on orientation is a challenging task. In the present work, we study the preferential packing of thiophene oligomers induced through rational molecular designing and self-assembly. The acceptor-donor-acceptor-type oligomers having 2-(1,1-dicyano-methylene)rhodanine as acceptor (OT1) favored a face-on packing, whereas that of functionalized with N-octyl rhodanine (OT2) preferred an edge-on packing as evident from 2D-grazing incidence angle X-ray diffraction, tapping-mode atomic force microscopy (AFM) and Raman spectroscopy analyses. The oligomers exhibited anisotropic conductivity in the self-assembled state as an outcome of the preferred orientation, revealed by the conducting AFM experiment.
Related Concept Videos
Rational Expressions
Rationalizing Substitutions
Asymptotes in Rational Functions
Rational Emotive Behavior Therapy
Location and Orientation of the Heart
Molecular Orbital Theory I

