Fullerene van der waals Oligomers as electron traps

Density functional theory calculations indicate that van der Waals fullerene dimers and larger oligomers can form interstitial electron traps in which the electrons are even more strongly bound than in isolated fullerene radical anions. The fullerenes behave like super atoms , and the interstitial electron traps represent one-electron intermolecular σ-bonds. Spectroelectrochemical measurements on a bis-fullerene-substituted peptide provide experimental support. The proposed deep electron traps are relevant for all organic electronics applications in which non-covalently linked fullerenes in van der Waals contact with one another serve as n-type semiconductors

Integrating metalloporphycenes into p-type NiO-based dye-sensitized solar cells

In the current work, we have explored a novel synthetic route towards metalated porphycenes and their use in p-type NiO-based dye-sensitized solar cells. Particular emphasis is placed on the influence that the relative positioning of the anchoring group exerts on the DSSC performance

Supplementary data for article: Lippert, R.; Shubina, T. E.; Vojnovic, S.; Pavic, A.; Veselinovic, J.; Nikodinovic-Runic, J.; Stankovic, N.; Ivanović-Burmazović, I. Redox Behavior and Biological Properties of Ferrocene Bearing Porphyrins. Journal of Inorganic Biochemistry 2017, 171, 76–89. https://doi.org/10.1016/j.jinorgbio.2017.03.002

Supplementary material for: [https://doi.org/10.1016/j.jinorgbio.2017.03.002]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/2467

Supplementary data for article: Lippert, R.; Shubina, T. E.; Vojnovic, S.; Pavic, A.; Veselinovic, J.; Nikodinovic-Runic, J.; Stankovic, N.; Ivanović-Burmazović, I. Redox Behavior and Biological Properties of Ferrocene Bearing Porphyrins. Journal of Inorganic Biochemistry 2017, 171, 76–89. https://doi.org/10.1016/j.jinorgbio.2017.03.002

Supplementary material for: [https://doi.org/10.1016/j.jinorgbio.2017.03.002]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/2467

Synthesis and evaluation of new guanidine-thiourea organocatalyst for the nitro-Michael reaction: Theoretical studies on mechanism and enantioselectivity

A new guanidine-thiourea organocatalyst has been developed and applied as bifunctional organocatalyst in the Michael addition reaction of diethyl malonate to trans-β-nitrostyrene. Extensive DFT calculations, including solvent effects and dispersion corrections, as well as ab initio calculations provide a plausible description of the reaction mechanism

Synthesis and Properties of Arylvinylidene-Bridged Triphenylamines

A series of arylvinylidene-bridged triphenylamines were efficiently synthesized through the thionation/Barton–Kellogg olefination sequence from their corresponding carbonyl precursors. The electrochemical investigations identified these highly distorted scaffolds as fairly strong electron donors capable of several reversible oxidation steps with the first oxidation occurring at a potential comparable to that of ferrocene for the <i>n</i>-hexyl-substituted diphenylvinylidene-bridged compound

Redox behavior and biological properties of ferrocene bearing porphyrins

In order to improve antimicrobial effects of previously studied meso-tetrakis(4-ferrocenylphenyl)porphyrin 1, we have modified its structure by replacing two trans-positioned ferrocenylphenyl moieties with methoxy methylene substituted tert-butylphenyl moieties. Newly synthesized 5(4),15(4)-bis-(ferrocenyl)-10(4),20(4)-bis-(tert-butyl)10(2),10(6),20(2),20(6)-tetrakis-(methoxy-methylene)-5,10,15,20-tetraphenylporphyrin 4 was chemically characterized in detail (by NMR, UV/Vis, IR, MALDI-TOF and ESI MS spectrometry, cyclic voltammetry, prediction of the relative lipophilicity as well as computational methods) and its biological effects were studied in terms of its antibacterial and antifungal activity (both with and without photoactivation), cytotoxicity, hemolysis and DNA cleavage. New ferrocene bearing porphyrin 4 has demonstrated a broader antimicrobial spectrum and modified effects on eukaryotic cells compared to 1. This was discussed in terms of its i) increased lipophilicity, while exhibiting.lower toxicity, and ii) the redox potential of a two-electron process that is shifted to lower values, in comparison to ferrocene, thus, entering the physiologically available range and being activated towards redox interactions with biomolecules.Supplementary material: [http://cherry.chem.bg.ac.rs/handle/123456789/3078

Redox behavior and biological properties of ferrocene bearing porphyrins

In order to improve antimicrobial effects of previously studied meso-tetrakis(4-ferrocenylphenyl)porphyrin 1, we have modified its structure by replacing two trans-positioned ferrocenylphenyl moieties with methoxy methylene substituted tert-butylphenyl moieties. Newly synthesized 5(4),15(4)-bis-(ferrocenyl)-10(4),20(4)-bis-(tert-butyl)10(2),10(6),20(2),20(6)-tetrakis-(methoxy-methylene)-5,10,15,20-tetraphenylporphyrin 4 was chemically characterized in detail (by NMR, UV/Vis, IR, MALDI-TOF and ESI MS spectrometry, cyclic voltammetry, prediction of the relative lipophilicity as well as computational methods) and its biological effects were studied in terms of its antibacterial and antifungal activity (both with and without photoactivation), cytotoxicity, hemolysis and DNA cleavage. New ferrocene bearing porphyrin 4 has demonstrated a broader antimicrobial spectrum and modified effects on eukaryotic cells compared to 1. This was discussed in terms of its i) increased lipophilicity, while exhibiting.lower toxicity, and ii) the redox potential of a two-electron process that is shifted to lower values, in comparison to ferrocene, thus, entering the physiologically available range and being activated towards redox interactions with biomolecules