Results 201 to 210 of about 22,468 (257)
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Tetrahedron, 1987
Abstract Treatment of 2,9-bis(chloromethyl)-1,10-phenanthroline with toluenesulfonamide and K 2 CO 3 in HCON(CH 3 ) 2 gave macro-cycle 1 (21%) composed of two phenantroline units bonded to each other through two CH 2 N(Ts)CH 2 bridges. The 18-membered inner ring system contains six nitrogens, each of which is separated by two carbons.
Steven J. Keipert +2 more
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Abstract Treatment of 2,9-bis(chloromethyl)-1,10-phenanthroline with toluenesulfonamide and K 2 CO 3 in HCON(CH 3 ) 2 gave macro-cycle 1 (21%) composed of two phenantroline units bonded to each other through two CH 2 N(Ts)CH 2 bridges. The 18-membered inner ring system contains six nitrogens, each of which is separated by two carbons.
Steven J. Keipert +2 more
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Selectivity in supramolecular host–guest complexes
Chem. Soc. Rev., 2008The background of possible selectivity-affinity correlations and their limitations is reviewed, with typical crown ether and cryptand complexes, ionic associations, hydrogen bonded complexes and complexes driven by van der Waals, stacking or hydrophobic interactions, with some additional topics including associations based on metal coordination as ...
Hans-Jörg, Schneider +1 more
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Host–Guest Complexation-Mediated Supramolecular Photon Upconversion
Journal of the American Chemical Society, 2020The phenomenon of photon upconversion, in which a system absorbs two or more photons of lower energy and emits a photon of higher energy, has been used in numerous applications, including non-destructive bioimaging, deep-penetrating photodynamic therapy, catalysis, and photovoltaic devices.
Indranil Roy +8 more
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Cyclodextrin host-guest indusion complexes
Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1990Etude electrochimique de l'oxygene apres addition de la cyclodextrine (α) en solution aqueuse ou en solution dans la dimethylformamide par voltammetrie cyclique sur une electrode a goutte de ...
Anne Marie Martre +2 more
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Mechanism of Host−Guest Complexation by Cucurbituril
Journal of the American Chemical Society, 2004The factors affecting host-guest complexation between the molecular container compound cucurbit[6]uril (CB6) and various guests in aqueous solution are studied, and a detailed complexation mechanism in the presence of cations is derived. The formation of the supramolecular complex is studied in detail for cyclohexylmethylammonium ion as guest.
César, Márquez +2 more
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Chemistry – A European Journal, 2008
AbstractA set of four hybrid host–guest complexes based on the inorganic crown ether analogue [H12W36O120]12− ({W36}) have been isolated and characterised. The cluster anion features a central rigid binding site made up of six terminal oxygen ligands and this motif allows the selective binding of a range of alkali and alkali‐earth‐metal cations.
Carsten, Streb +4 more
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AbstractA set of four hybrid host–guest complexes based on the inorganic crown ether analogue [H12W36O120]12− ({W36}) have been isolated and characterised. The cluster anion features a central rigid binding site made up of six terminal oxygen ligands and this motif allows the selective binding of a range of alkali and alkali‐earth‐metal cations.
Carsten, Streb +4 more
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Supramolecular Peptide Amphiphile Vesicles through Host–Guest Complexation
Angewandte Chemie, 2012Single-tail peptide amphiphiles, have been explored as a new class of biomaterials in many fields including nanotechnology and tissue engineering. A typical peptide amphiphile molecule is linked through a covalent amide bond between a hydrophilic peptide sequence and a hydrophobic lipid of variable length.
Dezhi Jiao +5 more
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A computational study of a host‐guest complex
Journal of Molecular Recognition, 1997The geometry and energetics of a complex involving pyrazine and an acridine diacid cleft-like host designed by Rebek were investigated at several levels of theory. Molecular mechanics (using the Tripos and CHARMm force fields), semiempirical quantum chemical approaches (with the AM1 and PM3 methods), and an ab initio quantum chemical method (RHF/STO-3G)
M, Sabio, S, Topiol
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Photochemistry of cyclodextrin host-guest complexes
Coordination Chemistry Reviews, 1993Abstract Cyclodextrins, when used as molecular receptors, can induce significant modifications of the photophysical and photochemical deactivation pathways of aromatic molecules. On the basis of examples, taken from the authors' work, the factors determining the behaviour of a photoexcited guest molecule in a cyclodextrin cavity are discussed with ...
P. Bortolus +3 more
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