The present disclosure provides a bimetallic nanostructure with stimuli-responsiveness, including: a metal seed; a nanogap including a dopamine-modified stimuli-responsive copolymer attached to only a portion of the metal seed; and a metal shell surrounding the nanogap. The bimetallic nanostructure has a controllable interior nanogap, and may be used as a surface-enhanced Raman scattering (SERS) nanoprobe with improved SERS signals by virtue of the presence of the interior nanogap.

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.

A compound of formula (I): for use in the prevention or treatment of a bacterial infection wherein: A is either S or Se; RA is selected from: wherein: each of Y.sup.1, Y.sup.2, Y.sup.3, Y.sup.4 and Y.sup.9 is independently selected from CH or N, wherein at least three of Y.sup.1, Y.sup.2, Y.sup.3, Y.sup.4 and Y.sup.9 is CH; V is selected from O, CH—OR.sup.01, N—CO.sub.2—R.sup.C2 or N—R.sup.N2; one of Y.sup.5, Y.sup.6, Y.sup.7 and Y.sup.8 is selected from CH and N, and the others are CH; X is selected from NH, S or O; R.sup.C1 is selected from O—R.sup.O2 or NHR.sup.N1; R.sup.O1 is selected from H and C.sub.1-3 unbranched alkyl; R.sup.O2 is C.sub.1-3 unbranched alkyl; R.sup.N1 is selected from H and C.sub.1-3 unbranched alkyl; R.sup.N2 is C.sub.1-3 unbranched alkyl; R.sup.C2 is either C.sub.1-3 unbranched alkyl or C.sub.3-4 branched alkyl; R.sup.C3 is selected from C.sub.1-3 unbranched alkyl and C.sub.2H.sub.4CO.sub.2H; R.sup.C4 is either H or Me; R.sup.C5 is either H or Me; R.sup.C6 represents one or two optional methyl substituents; and n is an integer from 2 to 8.

##STR00001##

The invention is directed to a method of treatment of proliferative diseases or disorders such as cancer with gold(I) N-heterocyclic carbene (NHC) thiourea or substituted thiourea complexes, to the complexes per se and to therapeutic compositions containing these gold(I) based complexes.

The invention is directed to a method of treatment of proliferative diseases or disorders such as cancer with gold(I) N-heterocyclic carbene (NHC) thiourea or substituted thiourea complexes, to the complexes per se and to therapeutic compositions containing these gold(I) based complexes.

A highly rigid tetradentate ligand is combined with a gold(III) ion as a thermally stable tetradentate gold(III) complex. The tetradentate gold(III) complex is a tetradentate gold(III) compound that can be used as a light-emitting material which can be used for fabricated of light-emitting devices such as an organic light-emitting diode (OLED). The tetradentate gold(III) compound can be deposited as a layer or a component of a layer using a solution-process or a vacuum deposition process. The luminescent tetradentate gold(III) compounds are robust and can provide electroluminescence (EL) with a high efficiency and brightness.

Tridentate platinum, palladium, and gold complexes of Formulas A-I and A-II and tridentate iridium and rhodium compounds of Formulas B-I, B-II, and B-III suitable for delayed fluorescent and phosphorescent or phosphorescent emitters in display and lighting applications. ##STR00001## ##STR00002##

Tridentate platinum, palladium, and gold complexes of Formulas A-I and A-II and tridentate iridium and rhodium compounds of Formulas B-I, B-II, and B-III suitable for delayed fluorescent and phosphorescent or phosphorescent emitters in display and lighting applications. ##STR00001## ##STR00002##

Precursors are prepared and employed in electron beam induced decomposition (EBID). The EBID precursors are complexes of the formula: X-M-Y, where M is Au or Ag; X is F, Cl, Br, I, CN, OR.sup.1, O.sub.2CR.sup.2, or R.sup.3; Y is P(OR).sub.3, NR.sub.3, unsubstituted or substituted pyrrole, unsubstituted or substituted pyridine, unsubstituted or substituted pyrrolidine, or unsubstituted or substituted piperidine; and where R, R.sup.1, R.sup.2, R.sup.3, and substituents of the substituted pyrrole, pyridine, pyrrolidine, or piperidine are independently H, C.sub.1-C.sub.8 alkyl, C.sub.6-C.sub.10 aryl, C.sub.1-C.sub.8 perfluoroalkyl, C.sub.1-C.sub.8 partially fluorinated alkyl, and SiR.sup.5R.sup.6R.sup.7 where R.sup.5, R.sup.6, and R.sup.7 are independently H, C.sub.1-C.sub.8 alkyl, or C.sub.1-C.sub.8 fluorinated alkyl. The decomposition of the EBID precursor results in the formation of one or more gold, silver, or any combination thereof features on a substrate.