Syntheses and Electronic Properties of the Nickel and Palladium Complexes of the Octaethylporphyrin(M1)-(Dihexylbithiophene)_n-Octaethylporphyrin(M2) System [OEP(M1)-(DHBTh)_n-OEP(M2)] Connected with the Diacetylene Linkage. A Methodology for Molecular Design of the Particular Electronic Structure.

In consequence, the electronic absorption spectra of the OEP(M1)-(DHBTh)_n-OEP(M2) system could be affected substantially by the following structure elements. Putting those structure elements together from the material viewpoint, the orientation of DHBTh could be regarded as a function selector to construct the main electronic structure of the system, the incorporated metal ions M as a modulation tool for adjustment of the transition energy for each function band and the number of DHBTh as a fine tuner to select the susceptibility to the external electronic stimulations. Therefore, a particular electronic structure of OEP(M1)-(DHBTh)_n-OEP(M2) corresponding to the particular electronic property would be constructed by choosing these three structure elements purposively. Since the structure elements could be generalized to expand into the orientations of DABTh, many other metal ions and the greater numbers of n, respectively, the present study would provide a methodology for construction of the particular electronic structures of various DABTh derivatives at the stage of molecular design.