Assembly of One-Dimensional Organic Luminescent Nanowires Based on Quinacridone Derivatives

The quinacridone derivatives N,N‘-dialkyl-1,3,8,10-tetramethylquinacridone (CnTMQA, n = 6, 10, 14) were
used as building blocks to assemble luminescent nano- and microscale wires. It was demonstrated that CnTMQA
with different lengths of alkyl chains display obviously different wire formation properties. C10TMQA and
C14TMQA showed a stronger tendency to form 1-D nano- and microstructures compared with C6TMQA.
The C10TMQA molecules could be employed to fabricate the wires with different diameters, which exhibited
a size-dependent luminescence property. The emission spectrum of the C10TMQA wires with diameters of
200−500 nm shows a broad emission band at 560 nm and a shoulder at around 535 nm, while the emission
spectrum of the C10TMQA wires with diameters of 2−3 μm reveals a narrower emission band at 563 nm.
For the CnTMQA-based samples with different morphologies, the emission property change tendency agrees
with that of the powder X-ray diffraction patterns of these samples.