dihydroxynaphthalene/cárie dentária

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Preparation of cage-shaped hexakis(spiroborate)s.

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In previous research studies, various types of prismatic cage-shaped molecular containers have been prepared and evaluated in terms of their guest inclusion properties. Basically, most of these molecular cages have a cationic or electron-deficient nature, and exhibit strong affinity mainly toward

Dual self-sorting by cucurbit[8]uril to transform a mixed micelle to vesicle.

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A systematic study on the cucurbit[8]uril (CB[8]) assisted transformation of a mixed micellar system of CTAB and a viologen surfactant to vesicles is depicted. The micelle to vesicle transformation is assisted by a charge transfer complex mediated ternary complexation between the viologen group of

Molecular pop-up toy: a molecular machine based on folding/unfolding motion of alkyl chains bound to a host.

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We have designed and synthesized a new type of molecular machine based on the folding/unfolding motion of an alkyl chain bound to a host, triggered by a redox stimulus. A guest molecule containing a viologen unit with a long alkyl chain 1(2+) and its one-electron reduced species 1 + . form very

A macrocyclic receptor containing two viologen species connected by conjugated terphenyl groups.

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A macrocyclic receptor molecule containing two viologen species connected by conjugated terphenyl groups has been designed and synthesised. The single-crystal X-ray structure shows that the two viologen residues have a transannular NN separation of ca. 7.4 Å. Thus, the internal cavity dimensions are

Complexation of polyvalent cyclodextrin ions with oppositely charged guests: entropically favorable complexation due to dehydration.

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Thermodynamic parameters for complexation of polyvalent cyclodextrin (CD) cation and anion with oppositely charged guests have been determined in D2O containing 0.02 M NaCl by means of 1H-NMR spectroscopy. Protonated heptakis(6-amino-6-deoxy)-beta-CD (per-NH3+-beta-CD) forms stable inclusion

X-ray structure of beta-cyclodextrin-2,7-dihydroxy-naphthalene.4.6 H(2)O: an unusually distorted macrocycle.

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The inclusion complex beta-cyclodextrin.2,7-dihydroxynaphthalene.4.6 H(2)O crystallized in the monoclinic space group P2(1), with a=14.082(3), b=19.079(4), c=12.417(3) A, beta=109.28(3) degrees, V=3149.0(11) A(3), and Z=2. An X-ray study performed at room temperature shows that the crystal packing

From Packed "Sandwich" to "Russian Doll": Assembly by Charge-Transfer Interactions in Cucurbit[10]uril.

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As the host possessing the largest cavity in the cucurbit[n]uril (CB[n]) family, CB[10] has previously displayed unusual recognition and assembly properties with guests but much remains to be explored. Herein, we present the recognition properties of CB[10] toward a series of bipyridinium guests

Hydrogen Bonding of CHCl(3) to Coordinated Nitric Oxide in a Binuclear Metallomacrocycle and the Crystal Structures of anti-[Mo(NO){HB(3,5-Me(2)C(3)HN(2))(3)}(2,7-O(2)C(10)H(6))](2).2CHCl(3).CH(2)Cl(2), syn-[Mo(NO){HB(3,5-Me(2)C(3)HN(2))(3)}(2,7-O(2)C(10)H(6))](2).0.67CHCl(3).2.7H(2)O, and syn-[Mo(NO){HB(3,5-Me(2)C(3)HN(2))(3)}(2,7-O(2)C(10)H(6))](2).3(CH(3))(2)CO.

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The reaction between [Mo(NO)(Tp)I(2)] {Tp(-) = hydrotris(3,5-dimethylpyrazol-1-yl)borate} and 2,7-dihydroxynaphthalene affords, as its major product, the binuclear complex [Mo(NO)(Tp)(2,7-O(2)C(10)H(6))](2). The reaction appears to proceed under kinetic control so that shorter reaction times afford

Reversible deformation-formation of a multistimuli responsive vesicle by a supramolecular peptide amphiphile.

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A systematic study of the ternary complex formation process for aromatic amino acids using ucurbit[8]uril (CB[8]) and a viologen amphiphile shows that the affinity of the amino acid needs to be higher or in a comparable range to that of CB[8] for the amphiphile in order to form the ternary complex.

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