Novel Polymerization of Fluorinated 2-Vinylcyclopropane in Aqueous Solution via Cyclodextrin Complexes

2003 ◽  
Vol 204 (12) ◽  
pp. 1475-1479 ◽  
Author(s):  
Soo Whan Choi ◽  
Oliver Kretschmann ◽  
Helmut Ritter ◽  
Marina Ragnoli ◽  
Giancarlo Galli
Keyword(s):  
Aqueous Solution ◽  
Cyclodextrin Complexes

Synthetic heme protein models that function in aqueous solution

2021 ◽  
Vol 57 (2) ◽  
pp. 148-173
Author(s):  
Hiroaki Kitagishi ◽  
Koji Kano
Keyword(s):  
Aqueous Solution ◽  
Heme Protein ◽  
Cyclodextrin Complexes ◽  
Protein Models

Supramolecular porphyrin–cyclodextrin complexes act as biomimetic heme protein models in aqueous solution.

Complexation of Fluorinated Amino Acid Derivatives by β- and γ-Cyclodextrin in Aqueous Solution. A 19F Nuclear Magnetic Resonance Study

1995 ◽  
Vol 48 (3) ◽  
pp. 505 ◽  
Author(s):  
SE Brown ◽  
CJ Easton ◽  
SF Lincoln
Keyword(s):  
Aqueous Solution ◽  
Amino Acid ◽  
Nuclear Magnetic Resonance Study ◽  
Amino Acid Derivatives ◽  
Magnetic Resonance Study ◽  
Cyclodextrin Complexes ◽  
Factors Affecting ◽  
Chemical Shift Data ◽  
Shift Data ◽  
Insight Into

A 19F n.m.r. study shows that the β-cyclodextrin complexes of deprotonated α-(p- fluorophenyl ) glycine, N-acetyl-α-(p- fluorophenyl ) glycine , deprotonated N-acetyl-α-(p- fluorophenyl ) glycine , and N-(p- fluorobenzoyl ) valine are characterized by stability constants KR/dm3 mol-1 and Ks/dm3 mol-1 =13�2 and 21�3, 34�1 and 35�2, 12�1 and 12� 1, and 84�2 and 93�2, respectively, where the first and second of each pair of values refers to the complex formed by the R and S enantiomers of the fluorinated amino acid derivatives, respectively, in 10% aqueous D2O solution at 295.5 K and I = 0.10 mol dm-3. A comparison of these data and the associated 19F chemical shift data with those for the analogous α- and γ- cyclodextrin complexes provides an insight into the factors affecting the stabilities and structures of these complexes.

Stability constants of α-cyclodextrin complexes of para-substituted aromatic ketones in aqueous solution

1998 ◽  
pp. 193-196 ◽  
Author(s):  
D. Martin Davies ◽  
Michael E. Deary ◽  
David I. Wealleans
Keyword(s):  
Aqueous Solution ◽  
Stability Constants ◽  
Cyclodextrin Complexes ◽  
Aromatic Ketones

Preparation and characterization of cyclodextrin complexes of doxycycline hyclate for improved photostability in aqueous solution

2021 ◽  
Author(s):  
Mukesh Pandey ◽  
Priyanka Rani ◽  
Lokesh Adhikari ◽  
Mukul Gupta ◽  
Ajay Semalty ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Cyclodextrin Complexes ◽  
Doxycycline Hyclate

Synthesis of FeBr3-cyclodextrin complexes in non-aqueous solution

2002 ◽  
Vol 2 (6) ◽  
pp. 509-514 ◽  
Author(s):  
Laura I. Rossi ◽  
Rita H. de Rossi
Keyword(s):  
Aqueous Solution ◽  
Cyclodextrin Complexes

Cyclodextrin and Termethylated Cyclodextrin Complexation of Aromatic Carboxylic Acids and Their Conjugate Bases in Aqueous Solution: the Effect of Size, Hydrophobicity and Charge

1995 ◽  
Vol 48 (6) ◽  
pp. 1125 ◽  
Author(s):  
K Hendrickson ◽  
CJ Easton ◽  
SF Lincoln
Keyword(s):  
Aqueous Solution ◽  
Carboxylic Acids ◽  
Potentiometric Titration ◽  
Complexation Constants ◽  
Cyclodextrin Complexes ◽  
Aromatic Carboxylic Acids ◽  
Factors Influencing ◽  
Cyclodextrin Complexation ◽  
Binary Complexes ◽  
Conjugate Bases

For α- cyclodextrin ( αCD ), the complexation constants (K) for the formation of binary host-guest complexes ( HA.αCD ) are 750�60, 1070�60, 27�3 and 17�4 dm3 mol-1 when the guests (HA) are benzoic, 4-methylbenzoic and (R)- and (S)-2-phenylpropanoic acids, respectively, as determined by potentiometric titration in aqueous solution at 298.2 K and I = 0.10 mol dm-3 ( KCl ). For the analogous hexakis (2,3,6-tri-O-methyl)-α- cyclodextrin complexes ( HA.TMαCD ), K = 1580�150, 2890�130, 220�10 and 207�8 dm3 mol-1, and for the heptakis (2,3,6-tri-O-methyl)-β-cyclodextrin complexes ( HA.TMαCD ), K = 200�20, 340�30, 129�5 and 170�10 dm3 mol-1. The binary complexes formed by the corresponding carboxylates (A-) are much less stable. Ternary host-guest α- cyclodextrin complexes (HA.αCD2) are also formed. These data, together with literature data for β- cyclodextrin, are discussed in terms of the factors influencing complexation.

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