Geschmack ist vorhersagbar: Mit FlavorMiner. FlavorMiner heißt das Tool, das IPB-Chemiker und Partner aus Kolumbien jüngst entwickelt haben. Das Programm kann, basierend auf maschinellem Lernen (KI), anhand der…
Seit Februar 2021 bietet Wolfgang Brandt, ehemaliger Leiter der Arbeitsgruppe Computerchemie am IPB, sein Citizen Science-Projekt zur Pilzbestimmung an. Dafür hat er in regelmäßigen Abständen öffentliche Vorträge zur Vielfalt…
Đorđević, M.; Jeremić, D.; Kaluđerović, G. N.; Gómez-Ruiz, S.; Anđelković, B.; Radanović, D.; Brčeski, I.;Synthesis and spectroscopic properties of large single-crystals of Pb(II), Hg(II) and Sr(II) methanesulfonato 1D coordination polymersPolyhedron80282-289(2014)DOI: 10.1016/j.poly.2014.05.056
Three new 1D coordination polymers, [Pb2(CH3SO3)4(H2O)2]n, [Hg(CH3SO3)2(H2O)2]n and [Sr(CH3SO3)2(H2O)]n, were synthesized as large single crystals. The crystals were analyzed and characterized by the means of X-ray analysis, IR and NMR spectroscopy, elemental analysis and solid state UV–Vis spectroscopy. The formation of 1D polymeric chains in the crystal structures of the title compounds is affected by the various bonding modes of the bridging methanesulfonate groups. The studied compounds showed no decomposition in the air.
Publikation
Zmejkovski, B. B.; Savić, A.; Poljarević, J.; Pantelić, N.; Aranđelović, S.; Radulović, S.; Grgurić-Šipka, S.; Kaluđerović, G. N.; Sabo, T. J.;Synthesis, characterization and in vitro antitumor activity of new palladium(II) complexes with (S,S)-R2edda-type estersPolyhedron80106-111(2014)DOI: 10.1016/j.poly.2014.02.026
Six palladium(II) complexes with (S,S)-R2edda-type esters ((S,S)-R2edda-type: (S,S)-eddch = (S,S)-ethylenediamine-N,N′-di-2-(3-cyclohexyl)propanoate, R = Me, Et, n-Pr, 1–3; (S,S)-pddch = (S,S)-propylenediamine-N,N′-di-2-(3-cyclohexyl)propanoate, R = Et, n-Pr, 4, 5; and (S,S)-eddip = (S,S)-ethylenediamne-N,N′-di-2-propanoate, R = i-Am, 6) were synthesized, characterized by IR, NMR spectroscopy, ESI-MS and elemental analysis. DFT calculations indicate that in case of 1–4, the most stable isomers are with (S,S)- and (R,S)-configuration of nitrogen atoms, but for complex 6 (R,R)- and (R,S)-N,N′-configured isomers. Furthermore, complex 5 was obtained as (S,S)-N,N′ configured isomer. Cytotoxicity study was performed against human cervical adenocarcinoma (HeLa), human alveolar basal adenocarcinoma (A549) and non-cancerous human fetal lung fibroblast (MRC-5) cell lines using colorimetric MTT assay. From the investigated palladium(II) complexes 2, 3 and 5 exhibited highest cytotoxic potential against HeLa (IC50: 28.5 ± 3.9, 29.5 ± 1.3 and 34.3 ± 3.2, respectively).
Publikation
Wessjohann, L. A.; Dessoy, M. A.;An efficient method for the preparation of silyl esters of diphosphoric, phosphoric, and phosphorous acidPolyhedron70133-137(2014)DOI: 10.1016/j.poly.2013.12.024
Tetrakis(trialkylsilyl) diphosphate (alkyl = Me, Et, iPr, tBu) can be obtained in quantitative yield by reacting commercial disodium dihydrogen diphosphate with the respective trialkyl chlorosilane in a triphasic system with formamide. The alkylsilane residues of the diphosphate silyl esters can be either partially or completely hydrolyzed without concurrent cleavage of the P–O–P bond of the diphosphate moiety. The method can be expanded to efficiently produce other persilylated or partially silylated phosphates and phosphites.