67389-64-4

Upstream product

• 629-93-6 n-iodooctadecane 
• 99-93-4 4-Hydroxyacetophenone 

Downstream Products

• 1310012-45-3 C₃₂H₄₇NO₃ 
• 1613332-38-9 C₃₇H₅₀Cl₂N₄OPd 
• 1613332-27-6 C₃₇H₅₀N₄O 

Relevant academic research and scientific papers

Mechanochromic luminescent difluoroboron beta-diketonates

The invention provides luminescent solid-state compositions comprising difluoroboron beta-diketonates wherein the compositions can exhibit mechanochromic luminescence. The mechanochromic effect on the luminescence can be reversible, such as thermally reversible. Various solid-state forms of the invention can have emission spectra that differ from the properties of the respective difluoroboron beta-diketonate in solution. The mechanochromic effect can be stimulated by pressure such as handwriting, and can be reversed over a period of minutes to hours at room temperature. The invention also provides methods of making and methods of using the solid-state compositions, such as for sensors and for information displays for use in biological sensing, and in art, design, and consumer products. Compositions of the invention, such as compositions in nanoparticulate form, or contained within a matrix material, can be used in conjunction with fluorescence microscopy to provide information concerning pressures and tensions within and external to living cells, tissues, or organisms.

Coordination behaviour of new dipyridylpyrazole ligands towards ZnCl 2 and PdCl2 fragments. Crystalline structural characterization and multinuclear NMR studies as evidence of linkage and conformational isomers

A series of novel N,N,N-donor pyrazole based ligands of the type pypz R(n)py (R(n) = C6H4OCnH 2n+1, n = 1, 12-18) (1-5) bearing two pyridine substituents at the 1- and 3-positions and an alkyloxyphenyl group at the 5-position have been prepared and characterized. The X-ray structure of pypzR(1)py is presented. Coordination of those ligands to MCl2 fragments (M = Zn, Pd) gives rise to complexes of the type [MCl2(pypzR(n)py)] (M = Zn, Pd; R(n) = C6H4OCnH2n+1; n = 1, 12-18) (6-15) which were characterized and studied in the solid state and in solution. In these compounds the ligands were highly versatile as they were metal coordinated in a N,N-bidentate, N,N,N-tridentate fashion or N,N-bidentate fashion with an additional interaction via the third active nitrogen, this different behaviour depending on the metal fragment as well as on the state (solid or in solution) in which the complexes are. The X-ray structures of [ZnCl2(pypzR(1)py)] (6) and [PdCl2(pypz R(1)py)] (11) have also been determined showing distorted trigonal bipyramid and square-planar geometries at the zinc and palladium centres, respectively. In both cases the coordination environment has been confirmed by 13C-and 15N-NMR studies in solid state. In particular, two binuclear M-M stereoisomers "Z"- and "U"-shaped may be established for the Pd derivative. The 1H and 13C-NMR studies in CDCl3 solution of (6) and (11) indicate the presence of monomeric species which exhibit the same or different bidentate coordination of the ligand, respectively, than that observed in solid state. However, DMSO-d6 causes a total dissociation of the ligand in Zn derivatives, while for the related Pd complexes two monomeric linkage isomers (N2,N1′PdCl2 and N2,N1′′PdCl2) were detected.

Precursors for fragrant ketones and fragrant aldehydes

The present invention refers to fragrance precursors of formula I for a fragrant ketone of formula II and one or more fragrant aldehydes or ketones of formula III and IV, These fragrance precursors are useful in perfumery, especially in the fine and functional perfumery.