Journal of inclusion phenomena
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Crystal structure of the clathrate compound [dibromotetra(pyridine)copper(II)]·pyridine. Characterization by EXAFS of the pyridine desorption product
Journal of inclusion phenomena - Tập 17 - Trang 127-135 - 1994
Powder samples of the new compound [Cu(C5H5N)4·Br2](C5H5N) and of its desorption
product have been studied by EXAFS. The crystal structure of
[Cu(C5H5N)4Br2]·(C5H5N) has been determined from three-dimensional X-ray
diffraction data and refined to theR value 0.038 for 379 observed reflections.
(orthorhombic,Ccca,a=12.033(8),b=14.764(3),c=16.768 Å,V=1897(3) Å3,Z=4). The
copper atom lies on a 222 sym...
Design and Synthesis of Cyclodextrin-Based Rotaxanes and Polyrotaxanes
Journal of inclusion phenomena - Tập 32 - Trang 363-373 - 1998
Rotaxanes are compounds in which a ring is threaded by a chain having bulky
terminal cap groups. In this article, we review the design, synthesis and
characterization of rotaxanes and polyrotaxanes of cyclodextrins threaded by an
alkyl chain or a poly(ethylene glycol) as well as the synthesis of a
light-driven molecular shuttle based on a cyclodextrin-rotaxane.
Synthesis and metal ion extraction of cone di-ionizable calix[4]arene-crown-7 ligands
Journal of inclusion phenomena - Tập 83 - Trang 37-43 - 2015
Cone calix[4]arene-1,3-crown-7 ligands bearing acidity tunable di-ionizable
groups were prepared to examine the effect of the cavity size for the crown
ether ring. The results of solvent extraction from aqueous solutions into
chloroform show that these ligands are highly selective for Ba2+ among the
alkaline earth metal cations and are good extractants for Pb2+ and for Hg2+.
Potentiometric Selectivities of Dibenzo-16-crown-5 Compounds for Alkali and Alkaline Earth Metal Cations and Ammonium Ions
Journal of inclusion phenomena - Tập 32 - Trang 133-150 - 1998
Potentiometric selectivities toward alkali and alkaline earth metal cations and
ammonium ions are utilized to probe the complexation of these cationic species
by dibenzo-16-crown-5 lariat ethers. Attachment of one or two pendant groups to
the central carbon of the three-carbon bridge in dibenzo-16-crown-5 markedly
alters the potentiometric responses of the ionophores when incorporated in
solvent p...
Complexes of tri- and tetra-protonated forms of 1,4,8,12-tetraazacyclopentadecane with chloride, nitrate, iodate, and sulfate ions in aqueous media: I. Formation constants, thermodynamic properties, and bonding mechanisms
Journal of inclusion phenomena - Tập 11 - Trang 333-348 - 1991
Complexation stoichiometries and formation constants of tri- and
tetra-protonated forms of 1,4,8,12-tetraazacyclopentadecane with NO 3 − , Cl−,
IO 3 − and SO 4 2− ions are determined by pH potentiometric and13C NMR
spectrometric measurements. Estimates of ΔH and ΔS are obtained from the values
of the temperature dependent formation constants and acid dissociation
constants. All four anions form on...
Highly selective binding behavior of (diethylamino)coumarin-modified β-cyclodextrin with bile acids
Journal of inclusion phenomena - Tập 93 - Trang 85-90 - 2018
A (diethylamino)coumarin-modified β-cyclodextrin (1) increased its fluorescence
intensity upon guest binding in an aqueous media, and this phenomenon was used
to detect organic compounds, specifically bile acids. The modified
β-cyclodextrin chemosensor in this study exhibited remarkable molecular
recognition, and particularly high selectivity toward certain bile acids,
including lithcholic, chenod...
Structure-Chemical Analysis of Multiple Complexations by Cyclodextrins
Journal of inclusion phenomena - Tập 50 - Trang 43-50 - 2004
The interactions between cyclodextrin and substrates having two binding sites in
aqueous solution are reviewed. For such substrates, multiple equilibria, NMR
chemical shift variations with full binding, solution structures of complexes,
and the effect of cavity size are analyzed quantitatively. After general
treatments of multiple equilibria and chemical shifts are given, they are
applied to three...
Polime phối hợp kẽm(II) và cadmium(II) với bis(4-pyridyl)benzylamine: cấu trúc và phát quang Dịch bởi AI
Journal of inclusion phenomena - Tập 101 - Trang 243-252 - 2021
Hai polime phối hợp, [(bpba)Zn(CH3COO)2]n (1) và [(bpba)3Cd2(NO3)4]n·nMeOH·4nH2O
(2) (bpba = bis(4-pyridyl)benzylamine), đã được tổng hợp bằng cách sử dụng
Zn(CH3COO)2·2H2O/Cd(NO3)2·4H2O và bpba trong một hỗn hợp dung môi, và được định
tính thêm. Ion kẽm(II) trong 1 hiển thị hình dạng tứ diện với hai nguyên tử oxy
của các ligand acetate và hai nhóm pyridine của các ligand bpba, và nó được liên
kết...
Synthesis and selectivity of sym-hydroxydibenzo-14crown-4 ionophores for protons, alkali metal cations, and alkaline earth cations in polymeric membranes
Journal of inclusion phenomena - Tập 9 - Trang 125-135 - 1990
Six derivatives of sym-hydroxydibenzo-14-crown-4 have been prepared and
incorporated into solvent-polymeric membranes. Responses of the membranes to
protons, alkali metal cations, and alkaline earth cations have been determined.
The preferred uptake of protons is attributed to proton complexation by stable
crown ether alcohol and diol monohydrate species.
Nanodimer cyclodextrin ligands with high affinity to steroids
Journal of inclusion phenomena - Tập 70 - Trang 353-357 - 2010
Molecular-imprinting by cross-linking of ligands of β-cyclodextrin (CD) complex
with steroids has been developed for the synthesis of tailor-made CD dimer.
Steroids of androstane (9α-hydroxy-androst-4-en-3,17-dione,
androst-4-en-3,17-dione, androsta-1,4-dien-3,17-dione (ADD)) and pregnane
(hydrocortisone, 6-methyl-hydrocortisone, 20-hydroxymethylpregna-1,4-diene-3-one
(HMPD)) series were used as t...
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