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2 article(s) from Bende, Attila

Design, synthesis and structure of novel G-2 melamine-based dendrimers incorporating 4-(n-octyloxy)aniline as a peripheral unit

Cristina Morar,
Pedro Lameiras,
Attila Bende,
Gabriel Katona,
Emese Gál and
Mircea Darabantu

Beilstein J. Org. Chem. 2018, 14, 1704–1722, doi:10.3762/bjoc.14.145

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Figure 1: The key elements for design and construction of the targeted G-2 dendrimers.

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Scheme 1: Convergent versus divergent three steps (a–c) synthesis of central building blocks C1 and C3.

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Scheme 2: Synthesis of G-1 dendrons D-Cl and D-N<P>NH. *As partial conversions of 1 into 2a and 2b based on t...

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Scheme 3: Synthesis of G-2 dendrimers 4–6 by m-trimerisations of G-1 dendrons D-Cl and D-N<P>NH.

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Scheme 4: Synthesis of G-2 dendrimers 7–9 by m-trimerisations of G-1 dendron D-N<P>NH.

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Figure 2: The three terms rotamerism of G-0 dendrons 2a and 3 about the C(s-triazine)–N(exocyclic) partial do...

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Figure 3: Comparative details from ¹H NMR spectra of G-2 dendrimer 5 (500 MHz, 5.0 mM in DMSO-d₆).

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Figure 4: Comparative IR spectra (KBr) of compounds 7a vs 7b (a), 7b vs trimesic acid (b), 8 vs C1 (c) and 9 ...

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Figure 5: 2D-¹H-DOSY NMR charts (DMSO-d₆, 500 MHz, 298 K) of compounds 7a, 7b (2.5 mM), 8 and 9 (5.0 mM).

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Figure 6: The DFT optimised geometry at M062X/def2-TZVP level of theory of G-2 dendrimer 7a in DMSO (hydrogen...

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Figure 7: The DFT optimised geometry at M062X/def2-TZVP level of theory of trimesic tris-carboxylate anion (a...

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Figure 8: The DFT optimised geometry at M062X/def2-TZVP level of theory of G-2 dendrimers 8 and 9 in DMSO.

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Figure 9: TEM images of homogeneously packed spherical nano-aggregates (a) and their agglomerations (b) in th...

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Figure 10: TEM images of homogeneously packed spherical nano-aggregates (a) and their agglomerations (b) in th...

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Figure 11: Proposed π-stacking interactions in compounds D-N<P>NH and 5–7a.

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Published 09 Jul 2018

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A three-armed cryptand with triazine and pyridine units: synthesis, structure and complexation with polycyclic aromatic compounds

Claudia Lar,
Adrian Woiczechowski-Pop,
Attila Bende,
Ioana Georgeta Grosu,
Natalia Miklášová,
Elena Bogdan,
Niculina Daniela Hădade,
Anamaria Terec and
Ion Grosu

Beilstein J. Org. Chem. 2018, 14, 1370–1377, doi:10.3762/bjoc.14.115

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Figure 1: Cryptands with 1,3,5-triphenylbenzene (1) and 2,4,6-triphenyl-1,3,5-triazine (2) aromatic reference...

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Scheme 1: Synthesis of cryptand 2.

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Figure 2: NMR spectra of cryptand 2: top, ¹H NMR; bottom, ¹³C NMR.

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Figure 3: Chemical shift changes of the reference signal (belonging to the more deshielded protons of the p-p...

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Figure 4: The equilibrium geometry structure of cryptand 2 having 2,4,6-triphenyl-1,3,5-triazine caps.

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Figure 5: The equilibrium geometry structures of the cryptand–anthracene (a) and cryptand–pyrene (b) host–gue...

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Figure 6: The equilibrium geometry structure of the cryptand 2–1,5-dihydroxynaphthalene host–guest complex.

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Figure 7: The inclusion dynamics of the anthracene in the cavity of the cryptand for different constrained di...

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Published 06 Jun 2018

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