2,4-Hexadiyne-l ,6-diol bis

Numerous diacetylene polymerizations have been characterized. To select a few that have been well studied, 2,4-hexadiyne-l,6-diol(bis-(p-toluene sulfonate)) (16), bis-(phenylurethane) (17) [101], and3,5-octadiyne-l,8-diol (18) [104]... 

Chance and Baughman24 studied photoconductivity in poly[2,4-hexadiyn-l, 6-diol bis(p-toluene sulfonate)]25. Simple polyacetylenes such as this one are unique... 

Garito, A. F., McGhie, A. R., Kalyanaraman, P. S. Kinetics of solid state polymerization of 2,4-hexadiyne-l,6-diol bis (p-toluene sulfonate). In Molecular metals. Hatfield, W. E. (ed.). New York Plenum Press 1979, pp. 255-260... 

Figure 3.26. Polydiacetylene mesomers (a) and (b) with different energetic conformation. A single crystal of poly(2,4-hexadiyne-l,6-diol-bis-p-toluene-sulfonate) shows strong TP resonances at about 2.7 eV and 2.1 eV, and a weaker TP state that is centered at 1.8 eV when irradiated with a 2 1 ps Ti sapphire laser [405].

Polydiacetylenes like poly(2,4-hexadiyne-l,6-diol bis(p-toluenesulfonate)) (26) have been studied by several authors [111,112,125-128]. 

Crystals of poly[2,4-hexadiyne-l,6-diol bis(p-toluenesulphonate)] [59, 60] are highly photoconductive, with high carrier mobilities, near 20m V s even at low electric fields. This corresponds to drift velocities of about 2.2 x 10 m s i.e. close to the velocity of sound in the material. It is interesting to note that the spectral dependence of photoconductivity (the so called action spectrum) in this and other polyacetylenes does not follow the absorption spectrum, but is shifted towards shorter wavelengths. Charge-carrier generation follows the Onsager one-dimensional model, at least for electric fields up to 10 V m [60, 61]. 

The two-step process of epitaxial polymerization has been applied to symmetrically substituted diacetylenes First, the monomers have been crystallized epitaxially on alkali halides substrates from solution and the vapor phase. The oriented monomer crystals are then polymerized under the substrate s influence by gamma-irradiation. The diacetylenes in this study are 2,4-hexadiyn-l,6-diol (HD) and the bis-phenylurethane of 5,7-dodecadiyn-l,12-diol (TCDU). The polydiacetylene crystal structures and morphologies have been examined with the electron microscope. Reactivity and polymorphism are found to be controlled by the substrate. 

PTS-PDA bis(p-toluenesulfonate-2,4-hexadiyne-l,6-diol PVDF poly(vinyl difiuoride)... 

Time-Resolved Photoconduction in the Polymer of the Bis(p-toluenesulfonate) of 2,4-Hexadiyne-l,6-diol... 

R. Zielinski, and J. Kalinowski, The electric permittivity and phase transition in the bis-(toluene sulphonate) of 2,4-hexadiyne-l,6-diol polymer single crystal, J. Phvs. C Solid State Phvs. 20 177 (1987). 

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