Porphyrin arrays connected with molecular wires

Optical and Photonic Functions of Conjugated Polymer Superlattices and Porphyrin Arrays Connected with Molecular Wires... 

Conjugated polymer superlattices and porphyrin arrays connected with molecular wires are superstructured materials, which exhibit unique optical and photonic functions. The former shows a shift in photoluminescence to higher energy which is interpreted as a quantum size effect. The latter class of materials exhibits photoconductivity by a hole carrier mechanism and photoinformation storage by a localized excitation mechanism. The syntheses of these two classes of materials are described. 

Porphyrin Arrays Connected With Molecular Wires... 

A proposed 3D porphyrin array connected with molecular wire... 

The present study on photoactive ID and 2D porphyrin arrays connected with molecular wires together with their syntheses open the way to 3 D porphyrin array which is expected to be a proto-type molecular device and an artificial photo-neuron. 

Both conjugated polymer superlattices and porphyrin arrays connected with molecular wires device which are described here represent powerful candidates for optical and photonic materials. 

Figure 47. Porphyrin assemblies. (A) Porphyrin monomer with two oligothiophene, (B) 1-D porphyrin arrays connected with molecular conjugated wires, (C) insulating wires and (D) 2-D porphyrin arrays connected with molecular conjugated wires. Reprinted with permission from Segawa, H. Nakayama, N. Shimidzu, T, /. Chem. Soc., Chem. Commun. 1992, 7B4.

Fig. 8 Singlet and triplet photoexcited states of 1-D porphyrin arrays connected with insulating molecular wires of short and long chains.

Fig. 25). Alternatively, one can "reverse the process. Porphyrin array formation can start with imidazolyl zinc porphyrin, which can be immobilized using, for example, thiolate attachment on the electrode surface [90,91]. In this case the porphyrin attached to the electrode can serve as a molecular solder connecting the electrode to polymers made of hundreds of meso-meso-or bis(acetylene)-linked bis(imidazolyl zinc porphyrins) 55 [92]. Molecular wires or light-energy conversion systems could be built on the basis of such technologies. 

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