International Business Machines Corporation

California Molecular Electronics Corporation

Robert R Schumaker

Edward M Engler

Vishnubhai Vitthalbhai Patel

James Parakka

Kenneth Herbert Nichols

James J Marek, Jr

Nilda Martinez Rivera

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 &#x3c0;-conjugated bis-anthracenyl compounds. Specifically disclosed are compounds having the formula: where X is sulfur or selenium; where the R and Rgroups are alkyl or alkyl that together form a ring of carbon atoms; where Ais 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.

Bis-anthracenyl chiroptical compositions

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. The inventive architectures are expected to be useful for constructing a variety of opto-electronic devices for application as chemical sensors or for the transmission, modulation, storage, or processing of information.

Supramolecular opto-electronic architecture of tautomeric compositions

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.

Heterofulvalene geminal dithiolate compounds and their selenium and

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.

Dithiobenzoate 4,5-dicyano-1,3-(dithiolidene-2-yl)methylene

This application is directed to highly conducting organometallic polymers having the following recurring units ##STR1## where M is at least one multivalent metal.

Highly conducting organometallic polymers

This application is concerned with tetrathiapentalene and tetraselenapentalene compounds. Specifically, it is concerned with 1, 3, 4, 6-tetrathia-2, 5-dihetero-pentalene and 1, 3, 4, 6-tetraselena-2,5-dihetero-pentalene compounds having the formula ##STR1## wherein X is S or Se; each of Y.sup.1 and Y.sup.2 is O, S, or Se; each of Z.sup.1 and Z.sup.2 is --SR, SeR or ##STR2## wherein R and R.sup.I are H, alkyl, aryl, or together form a ring of carbon atoms; and An is the anion of a strong acid. These compounds are key synthetic intermediates for the preparation of tetrathiafulvalene and tetraselenafulvalene materials.

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San Jose, CA, United States of America

Robert R Schumaker