NEW CONDUCTIVE MOLECULAR COMPOSITES - ANILINE DERIVATIVES AS GUEST MOLECULES ENCAPSULATED AND POLYMERIZED WITHIN THE CHANNELS OF THE HOST 3D-COORDINATION POLYMERS [(ME3E)(3)FE(CN)(6)](INFINITY) WHERE E = SN ORPB

New conductive molecular composites have been prepared by chemical oxi dation of polyanilines within the expandable wide channels of the 3D-c oordination polymers [(Me3E)(3)Fe(CN)(6)](infinity) where E = Sn or Pb , in the presence and absence of HCl. The UV and visible absorption sp ectra of the protonated and deprotonated molecular composites are comp ared with those of polyanilines, polyemeraldine and nigrosine. The pro tonated molecular composites exhibit conductivities higher than the de protonated ones. Also, polymerization of some aniline derivatives with in the channels of the 3D-polymers, in absence of HCl, leads to vast i mprovement in conductivity owing to self protonation of the polyemeral dine base. The dramatic shift in optical response of the molecular com posite containing polyemeraldine base with change in pH could be used as an optical pH sensor over the pH range investigated.