A compound having the structure of Formula I ##STR00001##
is disclosed, where G.sup.a has the structure ##STR00002##
and G.sup.b has the structure ##STR00003##
In the structure of Formula I, Z is selected from Si and Ge; X.sup.a and X.sup.b are independently selected from the group consisting of O, S, and Se; the Y and Z atoms forming the six-membered rings in Formula I, G.sup.a, and G.sup.b are each independently selected from C or N; each R.sup.1, R.sup.2, R.sup.a1, R.sup.a2, R.sup.b1, and R.sup.b2 is independently selected from a variety of substituents; at least one R.sup.a1 is L.sup.a-A.sup.a; at least one R.sup.b1 is L.sup.b-A.sup.b; A.sup.a and A.sup.b are each independently selected from carbazole, dibenzofuran, dibenzothiophene, dibenzoselenophene, triphenylene, and nitrogen-substituted variants thereof, which are optionally further substituted; and L.sup.a and L.sup.b are each independently an organic linker. Formulations and devices, such as an OLEDs, that include the compound of Formula I are also described.

A compound having the structure of Formula I ##STR00001##
is disclosed, where G.sup.a has the structure ##STR00002##
and G.sup.b has the structure ##STR00003##
In the structure of Formula I, Z is selected from Si and Ge; X.sup.a and X.sup.b are independently selected from the group consisting of O, S, and Se; the Y and Z atoms forming the six-membered rings in Formula I, G.sup.a, and G.sup.b are each independently selected from C or N; each R.sup.1, R.sup.2, R.sup.a1, R.sup.a2, R.sup.b1, and R.sup.b2 is independently selected from a variety of substituents; at least one R.sup.a1 is L.sup.a-A.sup.a; at least one R.sup.b1 is L.sup.b-A.sup.b; A.sup.a and A.sup.b are each independently selected from carbazole, dibenzofuran, dibenzothiophene, dibenzoselenophene, triphenylene, and nitrogen-substituted variants thereof, which are optionally further substituted; and L.sup.a and L.sup.b are each independently an organic linker. Formulations and devices, such as an OLEDs, that include the compound of Formula I are also described.

The invention relates to the development of drugs intended for the prophylaxis and/or treatment of viral diseases caused, in particular, by herpes viruses. What are proposed are complex compounds of germanium having the general structural formula:
Ge.sub.x[AD][CA].sub.y[AA].sub.2   (1), where AD is a derivative of a nitrogenous base of the purine series that has antiviral activity and can be selected from guanine derivatives, such as acyclovir, valacyclovir, gancyclovir and pencyclovir, or from adenine derivatives, such as vidarabine; CA is a hydroxycarboxylic acid which can be selected from acids such as (but not limited to) citric acid, lactic acid and malic acid; AA is an amino acid which can be selected from various a-amino acids, such as arginine, gylcine, lysine and threonine, and where x=1-2, y=2-4 and z=0-2. Complex compounds of germanium have a high level of antiviral and immune-stimulating activity and are readily soluble in water. The above mentioned compounds are produced by producing an aqueous suspension of germanium dioxide, adding a hydroxycarboxylic acid, a derivative of a nitrogenous base of the purine series and, optionally, but preferably, an amino acid thereto, heating the mixture produced at a temperature of 40-100° C. for 3-14 hours while stirring and removing the water from the solution, thus producing a complex compound of germanium.

The invention relates to the development of drugs intended for the prophylaxis and/or treatment of viral diseases caused, in particular, by herpes viruses. What are proposed are complex compounds of germanium having the general structural formula:
Ge.sub.x[AD][CA].sub.y[AA].sub.2   (1), where AD is a derivative of a nitrogenous base of the purine series that has antiviral activity and can be selected from guanine derivatives, such as acyclovir, valacyclovir, gancyclovir and pencyclovir, or from adenine derivatives, such as vidarabine; CA is a hydroxycarboxylic acid which can be selected from acids such as (but not limited to) citric acid, lactic acid and malic acid; AA is an amino acid which can be selected from various a-amino acids, such as arginine, gylcine, lysine and threonine, and where x=1-2, y=2-4 and z=0-2. Complex compounds of germanium have a high level of antiviral and immune-stimulating activity and are readily soluble in water. The above mentioned compounds are produced by producing an aqueous suspension of germanium dioxide, adding a hydroxycarboxylic acid, a derivative of a nitrogenous base of the purine series and, optionally, but preferably, an amino acid thereto, heating the mixture produced at a temperature of 40-100° C. for 3-14 hours while stirring and removing the water from the solution, thus producing a complex compound of germanium.

The invention provides a polycyclic aromatic compound or a salt thereof having a partial structure represented by the following general formula (I): ##STR00001##
wherein X, ring A, ring B, ring C, and ring D are as defined in the specification.

The invention provides a polycyclic aromatic compound or a salt thereof having a partial structure represented by the following general formula (I): ##STR00001##
wherein X, ring A, ring B, ring C, and ring D are as defined in the specification.

The invention relates to metal complex compounds of the formula M.sub.k(L).sub.x(Y).sub.kz-nx, where the ligand L has the formula (I), and to metal complex compounds which include the reaction product of at least one salt or a complex of a transition metal or a main group metal element of the groups 13 to 15 and at least one 1,3-ketoamide. Such complex compounds are suitable in particular as catalysts for polyurethane compositions. The invention also relates to two-component polyurethane compositions including at least one polyisocyanate as the first component, at least one polyol as the second component, and at least one such metal complex compound as the catalyst. The invention additionally relates to different uses of the two-component polyurethane compositions.

The invention relates to metal complex compounds of the formula M.sub.k(L).sub.x(Y).sub.kz-nx, where the ligand L has the formula (I), and to metal complex compounds which include the reaction product of at least one salt or a complex of a transition metal or a main group metal element of the groups 13 to 15 and at least one 1,3-ketoamide. Such complex compounds are suitable in particular as catalysts for polyurethane compositions. The invention also relates to two-component polyurethane compositions including at least one polyisocyanate as the first component, at least one polyol as the second component, and at least one such metal complex compound as the catalyst. The invention additionally relates to different uses of the two-component polyurethane compositions.

The present disclosure provides a new series of compounds exhibiting high fluorescence quantum yields in the solid state. In one embodiment, the compounds include a series of 2,3,4,5-tetraphenylgermoles with the same or different 1,1-substituents. In another embodiment, substituted germafluorenes, germa-fluoresceins/rhodamines, and germapins are described. These germanium heterocycles possess ideal photophysical and thermostability properties, which makes them excellent candidates for chemical or biological sensors, host materials for electroluminescent devices and solar cells, and emissive and/or electron-transport layer components in organic light emitting diode devices.

The present disclosure provides a new series of compounds exhibiting high fluorescence quantum yields in the solid state. In one embodiment, the compounds include a series of 2,3,4,5-tetraphenylgermoles with the same or different 1,1-substituents. In another embodiment, substituted germafluorenes, germa-fluoresceins/rhodamines, and germapins are described. These germanium heterocycles possess ideal photophysical and thermostability properties, which makes them excellent candidates for chemical or biological sensors, host materials for electroluminescent devices and solar cells, and emissive and/or electron-transport layer components in organic light emitting diode devices.