Geometry-Driven Excited-State Intramolecular Proton Transfer-TADF Modulation in Phenoxazine Donor-Amide Systems

ChemRxiv 2026 Preprint Open access

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Authors: Sabyasachi Maity, Thamodharan Viswanathan, S H Nandish, Sandhayarani Pal, Pachaiyappan Rajamalli
DOI: 10.26434/chemrxiv.15000117/v1
Cited by: 0

Abstract

We report the first comprehensive structure-property-device study of phenoxazine-spacer amide emitters: phenoxazine-phenyl (1), phenoxazine-pyridine (2), and phenoxazine-pyrazine (3). This phenoxazine-π-amide platform exploits spacer identity and donor-acceptor geometry to regulate intramolecular N-H⋯N hydrogen bonding, donor-spacer dihedral angles (34-85 °), and HOMO-LUMO coupling, thereby tuning local versus charge-transfer character.

Fields of Study & Subjects

Organic Light-Emitting Diodes Research Photochemistry and Electron Transfer Studies Luminescence and Fluorescent Materials

Publication details

Journal / source
ChemRxiv
Publication date
16 February 2026
Language
EN
Document type
Preprint