Jt-conjugated oligomers

Figure 10.6 Schematic diagram of the setup for optically pumped photoluminescence measurements. The excitation polarization was varied by a half-wave plate. The emitted light was collected by the CCD spectrometer along the direction parallel to the sample surface. Reproduced from H. Yanagi, 5. Hotta, S. Kobayashi and F. Sas i, Low-dimensional jt-conjugating oligomer crystals - Raman laser action and pulse-shaped emission with time delay, Oyo Buturi, 75, 1471-1475 (2006) with permission of The Japanese Society of Applied Physics...

FIGURE 2.39 Efficient Jt-conjugated oligomer-tetrafullerene derivative employed in solar cells. 

A rapid and versatile covalent assembly technique starting from DEE oligomers has provided the 11.9 nm long hexadecameric poly(triacetylene) rod 20.1481 With its linearly conjugated 16 double and 32 triple bonds spanning in-between the terminal silicon atoms, compound 20 is currently the longest linear, fully Jt-conjugated molecular wire without aromatic repeat units in the backbone. 

The introduction of angular connectors (e.g. 1,3-phenylenes, 2,7-naphthylenes) in the Jt-conjugated backbones may provide an oligomer with a preferred helical... 

This chapter addresses synthetic aspects of molecules with highly annelated chiral JT-conjugated systems, with the focus on helicene-type oligomers [20], In addition to synthesis, configurational stability (barriers for racemization) and selected chiroptical properties of such molecules will be discussed. 

Scheme 11.1 Classification of conductive/ electroactive solids and films, (a) Molecular charge-transfer (CT) complexes and jt-conjugated linear oligomers (b) Mixed electronic-ionic conductors inorganic jt-conjugated polymers and polymer-like...

Jt-Stacked Oligomers as Models for Semiconducting Conjugated Organic Materials... 

---