Work

One‐Pot Incorporation of Quantum Defects into Single‐Walled Carbon Nanotubes with Arylazo Sulfonates

Year: 2025

Type: article

Abstract: quantum defects (QDs) creates novel NIR emission features, which promise huge potential for (bio)photonics. However, so far defect chemistry based on diazonium salts is mainly limited to benzene derivatives. The reaction side products also quench SWCNT fluorescence and impair additional surface chemistry. Here, we introduce a photochemical strategy based on arylazo sulfonates to a) create more complex aromatic QDs and b) avoid side products that adsorb and quench. We show that this way coumarin and other QDs are incorporated, which increases overall NIR emission by more than 90% without purification. These materials can be non-covalently modified with biocompatible polymers (polyethyleneglycoles, DNA) without a change in photophysical properties and we demonstrate mechanical (viscosity) and chemical (neurotransmitter dopamine) sensing. This one-pot approach creates QDs in SWCNTs and provides access to advanced hybrid materials for photonic applications.

Source: Angewandte Chemie International Edition

DOI: 10.1002/anie.202521215

Authors: Valeriia D. Andreeva, Justus T. Metternich, Chen Ma, Janus A.C. Wartmann, Sebastian Kruss

Institutions: Ruhr University Bochum, Fraunhofer Institute for Microelectronic Circuits and Systems

Language: English

Topic: Carbon Nanotubes in Composites

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $5,510

Funder: Deutsche Forschungsgemeinschaft