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Updated: Feb 20, 2026

Synthesis and Purification of Iodoaziridines Involving Quantitative Selection of the Optimal Stationary Phase for Chromatography
Published on: May 16, 2014
Approaches for Selective Synthesis of Ullazine Donor-Acceptor Systems
Nikita A Drigo1, Sanghyun Paek1, Aron J Huckaba1
1Group for Molecular Engineering of Functional Materials, Institution of Chemical Sciences and Engineering, Ecole Polytechnique Federale de Lausanne, CH-1951, Sion, Switzerland.
Abstract:
Methods for effective synthesis for the four possible isomeric 3,9-diphenylullazine carboxaldehydes and reactive halogen intermediates are described. Ullazine donor-acceptor (D-A) dyes were studied using UV/Vis, photoluminescence (PL) spectroscopy and cyclic voltammetry. X-ray single crystal diffraction analysis independently confirmed the structures of two key intermediates. A D-A dye based on ullazine with dihexylmalonate acceptor was tested as a dopant-free hole-transporting material (HTM) in a perovskite solar cell, exhibiting promising power conversion efficiency (PCE) reaching 13.07 %.
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