Project Description
Zone-casting of N-heteropolycycles has been shown to improve charge-transport, to create new thin-film polymorphs, and to produce long-range order and molecular alignment. The core and substituents of many N-heteropolycycles can be designed to create chiral molecules. Their chiro-optical properties in solution can be further enhanced when deposited in a controlled way. Through the combination of self-assembly and guided deposition, chiral films with large dissymmetry factors in absorption (CD) and emission of circularly polarized (CP) light will be created. The orientation and packing of molecules with respect to each other (polymorphs) will be studied by Raman spectroscopy, IR-SNOM and X-ray diffraction. Films that show high CD values will be applied as chiral filters and as active materials for CP-light selective photodetectors.
Selected Publications
N. J. Herrmann, O. Korychenska, N. P. Ta, G. E. Mayneord, X. Rodriguez-Martinez, D. T. W. Toolan, C. C. Robertson, A. Iraqi, J. Clark and J. Zaumseil, J. , Fast, slow and reverse polymorph transformations in thin films of a 5,10-dihydroindolo[3,2-b]indole derivative, Mater. Chem. C, 2025, 13, 17838 - 17848.
P. V. Kolesnichenko, M. Hertzog, F. Hainer, O. Kefer, J. Zaumseil and T. Buckup, Dark Excitons and Hot Electrons Modulate Exciton-Photon Strong Coupling in Metal–Organic Optical Microcavities, ACS Photonics, 2025, 12, 3344–3354.
