Sulfur containing stable unsubstituted heptacene analogs.

Heptacene and higher polyacenes have been sought for their high degree of charge carrier mobility in thin film transistors. Such acenes are, however, extremely unstable in ambient conditions. Approaches to obtain stable heptacenes include introduction of suitable substituents, of heteroatoms, or both.

Carbazole-based cyano-stilbene highly fluorescent microcrystals.

Aggregation-induced enhanced emission (AIEE) is reported for 1-cyano-trans-1,2-bis-(4-carbazolyl)phenylethylene (CN-CPE). The weak luminescence of dilute CN-CPE solutions is enhanced upon aggregate formation into 2-3 μm sized crystals. In contrast to general observations, crystal formation of CN-CPE causes a blue-shift in emission and enhances the intensity.

Photoinduced hole transfer forming polymer quantum dot nanocomposites.

The study of hole transfer from CdSe QD core to ligands under visible light irradiation and conductive polymer-QD composites formation without conventional photoinitiator.

Isomer restriction on a nanoparticle surface and enhanced blue emission.

5-Mercapto-2,2'-bithiophene (BTSH) functionalized copper (Cu), silver (Ag), and gold (Au) nanoparticles (NPs) of various diameters have been synthesized. Emission with a peak around 455 nm is detected on irradiation with UV light. This emission, however, disappears upon photopolymerization of the NPs.