Supramolecular Chemistry of Pyronines B and Y, β-Cyclodextrin and Linked β-Cyclodextrin Dimers

2010 ◽  
Vol 63 (4) ◽  
pp. 687 ◽  
Author(s):  
Huy T. Ngo ◽  
Philip Clements ◽  
Christopher J. Easton ◽  
Duc-Truc Pham ◽  
Stephen F. Lincoln
Keyword(s):  
Aqueous Solution ◽  
Nmr Spectroscopy ◽  
Fluorescence Quenching ◽  
Supramolecular Chemistry ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Complexation Constants

The complexation of cationic pyronine B (PB+) and pyronine Y (PY+) by β-cyclodextrin (βCD) and two linked βCD dimers, N,N′-bis((2AS,3AS)-3A-deoxy-β-cyclodextrin-3A-yl)succinamide, 33βCD2suc, and N,N′-bis(6A-deoxy-β-cyclodextrin-6A-yl)succinamide, 66βCD2suc, in aqueous solution has been studied by UV-vis, fluorescence, and 1H NMR spectroscopy. The complexation constants for the 1:1 complexes: βCD.PB+, 33βCD2suc.PB+, 66βCD2suc.PB+, and the analogous PY+ complexes are reported as are the dimerization constants for PB+ and PY+. The modes of complexation, dimerization, and fluorescence quenching are discussed.

Comparative conformational analyses of μ-selective dermorphin and §-selective deltorphin-II in aqueous solution by 1H-NMR spectroscopy

2009 ◽  
Vol 44 (3) ◽  
pp. 295-304 ◽  
Author(s):  
MOTOZUMU SEGAWA ◽  
YASUNORI OHNO ◽  
MITSUNOBU DOI ◽  
MASATOSHI INOUE ◽  
TOSHIMASA ISHIDA ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Nmr Spectroscopy ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Deltorphin Ii

Encapsulation of L-Valine, D-Leucine and D-Methionine by Cucurbit[8]uril

CrystEngComm ◽  
2022 ◽  
Author(s):  
Zenghui Zhang ◽  
Rui-Lian Lin ◽  
Xiangyun Yu ◽  
Li-Xia Chen ◽  
Zhu Tao ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Solid State ◽  
Nmr Spectroscopy ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Binding Interactions ◽  
X Ray ◽  
X Ray Crystallography

The binding interactions of cucurbit[8]uril (Q[8]) with L-Valine, D-Leucine, and D-Methionine, both in aqueous solution and solid state, have been studied by 1H NMR spectroscopy and X-ray crystallography. 1H NMR...

scholarly journals Investigation of the interaction of ethidium bromide with self complementary deoxytetranucleotide 5'-d (ApCpGpT) in aqueous solution by the method of 1H NMR spectroscopy

1995 ◽  
Vol 11 (3-4) ◽  
pp. 42-54 ◽  
Author(s):  
A. N. Veselkov ◽  
L. N. Djimant ◽  
P. A. Bolotin ◽  
S. F. Baranovsky ◽  
D. A. Veselkov ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Nmr Spectroscopy ◽  
1H Nmr ◽  
Ethidium Bromide ◽  
1H Nmr Spectroscopy

scholarly journals A Study of the Interaction between Cucurbit[7]uril and Alkyl Substituted 4-Pyrrolidinopyridinium Salts

Chemistry ◽  
2020 ◽  
Vol 2 (2) ◽  
pp. 262-273 ◽  
Author(s):  
Weitao Xu ◽  
Xinyi Zhu ◽  
Bing Bian ◽  
Xin Xiao ◽  
Zhu Tao ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Aqueous Solution ◽  
Nmr Spectroscopy ◽  
1H Nmr ◽  
Absorption Spectroscopy ◽  
Electronic Absorption ◽  
1H Nmr Spectroscopy ◽  
Electronic Absorption Spectroscopy ◽  
Pyridinium Nitrogen

The interaction between cucurbit[7]uril (Q[7]) and a series of 4-pyrrolidinopyridinium salts bearing aliphatic substituents at the pyridinium nitrogen, namely 4-(C4H8N)C5H5NRBr, where R = H (C0), Et (C2), n-butyl (C4), n-hexyl (C6), has been studied in aqueous solution by 1H NMR spectroscopy, electronic absorption spectroscopy, and mass spectrometry.

Complexation of Crystal Violet, Pyronine B, and Rhodamine B by Linked β-Cyclodextrin Trimers

2013 ◽  
Vol 66 (9) ◽  
pp. 1057 ◽  
Author(s):  
Hanh-Trang Nguyen ◽  
Duc-Truc Pham ◽  
Christopher J. Easton ◽  
Stephen F. Lincoln
Keyword(s):  
Nmr Spectroscopy ◽  
1H Nmr ◽  
Crystal Violet ◽  
Rhodamine B ◽  
Phosphate Buffer ◽  
1H Nmr Spectroscopy ◽  
Complexation Constants ◽  
Wide Range

The host-guest complexation by β-cyclodextrin (βCD), 1,3,5-N,N,N-tris-(6A-deoxy-6A-β-cyclodextrin)-benzene (βCD3bz), and 1,3,5-N,N,N-tris(6A-(2-aminoethyl)amino-6A-deoxy-6A-β-cyclodextrin)-benzene (βCDen3bz) of cationic crystal violet (CV+) and pyronine B (PB+) and zwitterionic rhodamine B (RB) in aqueous phosphate buffer at pH 7.0 and I = 0.10 mol dm–3 has been studied by UV-Vis and 1H NMR spectroscopy. The complexation constants 10–3K1 (298.2 K) are 4.68, 86.3, and 7.08 dm3 mol–1 for the 1 : 1 host-guest complexes: βCD.CV+, βCD3bz.CV+, βCDen3bz.CV+, respectively, and those for the analogous PB+ and RB complexes have also been determined. The associated ΔHo and TΔSo for all nine complexes coincide with an entropy-enthalpy compensation plot for the formation of a wide range of βCD and modified βCD host-guest complexes reported in the literature. Crystal violet also forms (βCD)2.CV+, (βCD3bz)2.CV+ and (βCDen3bz)2.CV+ complexes characterised by 10–2K2 (298.2 K) = 2.14, 4.57, and 3.86 dm3 mol–1 and analogous (βCD)2.PB+, (βCDen3bz)2.PB+ and (βCDen3bz)2.RB complexes also form, but the (βCD3bz)2.PB+, (βCD)2.RB, and (βCD3bz)2.RB complexes were not detected. The effects of the structures of the hosts and guests on the complexation processes are discussed.

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