Abstract: Optoelectronic materials are provided that are bistable organic tautomeric compositions that intraconvert dithio or diseleno carbamate esters and cyclic 1,3-dithia- or -diselena-2-iminium salts of ?-conjugated bis-anthracenyl compounds. Specifically disclosed are compounds having the formula: where X is sulfur or selenium; where the R and R1 groups are alkyl or alkyl that together form a ring of carbon atoms; where An is the anion of a strong acid; and where the Z element is a chiral ring-completing system of atoms that changes chirality on tautomerization. These molecules are in themselves molecular-sized optoelectronic switching devices.

Abstract: A procedure is disclosed for assembly of novel two-sided monolayer or multilayer device architectures out of self-assembly or self-organizing amphiphilic compounds derived from molecules that undergo a type of valence tautomerization known as asymmetric narcissistic reactions. The two-sided monolayer architectures are constructed by Langmuir-Blodgett (LB) transfer or self-assembly (SA) techniques while the multilayer architectures are formed by Y-type LB depositions, where the two layers or bilayers of the assemblies are alternate depositions of mirror-image forms of the amphiphiles. The resulting three-dimensional supramolecular assemblies described herein are uniquely capable of commutation between two non-centrosymmetric states which have, on a macroscopic scale, an optically antipodal relationship and a third central symmetric state which is, accordingly, optically racemic.

Abstract: This application is directed to optoelectronic materials which are bistable organic tautomeric compositions of dithio or diseleno carbamate esters of cyclic 1,3-dithia or -diselena-2-iminium salts. Specifically, it is concerned with compounds having the formula: ##STR1## Wherein X is S or Se; wherein R or R.sub.1 are alkyl, or alkyl that together form a ring of carbon atoms; wherein An is the anion of a strong acid. These molecules are in themselves molecular-sized optoelectric switching devices.

Abstract: The invention is directed to novel heterofulvalene geminal dithiolate compounds and their selenium and tellurium analogs having the general formula ##STR1## Wherein X is selected from S, Se and Te. R is selected from hydrogen, alkyl, aryl, or together form a ring of carbon atoms, cyano and dithiocarbonate groups and R.sup.1 is selected from alkali, alkaline earth and transition metals, alkyl, aryl, cyclic and heterocyclic groups.A novel method for preparing these compounds is also provided.

Abstract: The invention is directed to novel heterofulvalene geminal dithiolate compounds and their selenium and tellurium analogs having the general formula ##STR1## Wherein X is selected from S, Se and Te. R is selected from hydrogen, alkyl, aryl, or together form a ring of carbon atoms, cyano and dithiocarbonate groups and R.sup.1 is selected from alkali, alkaline earth and transition metals, alkyl, aryl, cyclic and heterocyclic groups.A novel method for preparing these compounds is also provided.

Abstract: The invention is directed to novel heterofulvalene geminal dithiolate compounds and their selenium and tellurium analogs having the general formula ##STR1## wherein X is selected from S, Se and Te. R is selected from hydrogen, alkyl, aryl, or together form a ring of carbon atoms, cyano and dithiocarbonate groups and R.sup.1 is selected from alkali, alkaline earth and transition metals, alkyl, aryl, cyclic and heterocyclic groups.A novel method for preparing these compounds is also provided.

Abstract: The invention is directed to novel heterofulvalene geminal dithiolate compounds and their selenium and tellurium analogs having the general formula ##STR1## Wherein X is selected from S, Se and Te. R is selected from hydrogen, alkyl, aryl, or together form a ring of carbon atoms, cyano and dithiocarbonate groups and R.sup.1 is selected from alkali, alkaline earth and transition metals, alkyl, aryl, cyclic and heterocyclic groups.A novel method for preparing these compounds is also provided.