Abstract
The scientific progresses in the organic molecular metals based on tetrathiafulvalene (TTF) type donors offer three general strategies for molecular design : (1) construction of new multi-stage redox systems, (2) chemical modifications to introduce interstack interactions, and (3) control of degree of charge transfer (CT) According to such strategies, we have recently synthesized peri-condensed Weitz type donors as new multistage redox systems, 3, 10-dithiaperylene (DTPR), 1, 6-dithiapyrene (DTPY), and methylthio and ethylenedithio derivatives of DTPY (MTDTPY, ETDTPY) These new donors produced a variety of CT complexes. An important finding is the realization of organic molecular metals having donors and acceptors outside the TTF and TCNQ (tetracyanoquinodimethane) type components. Not only some physical properties of these new molecular conductors but also some basic features for organic conductors from the organic chemistry point of view are presented.
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