Journal ArticleDOI
An investigation of the kinetic and thermodynamic stability of a tribenzomacrobicyclic polyether complex with Diquat in acetone solution
F. H. Kohnke,J. Fraser Stoddart +1 more
TLDR
In this paper, the quest is encapsulated within the host and the complexation strength is enhanced by the macrobicyclic cryptate effect in the 1 : 1 complex.Abstract:
Variable-temperature 1H n.m.r. spectroscopic studies in CD3COCD3 and u.v. spectroscopic measurements in Me2CO demonstrate that in the 1 : 1 complex, [Diquat·(1)]2+, the quest is encapsulated within the host and that the complexation strength (ΔG°=–7.4 Kcal mol–1) is enhanced by the macrobicyclic cryptate effect.read more
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Journal ArticleDOI
Big and little Meccano
TL;DR: The emergence of the mechanical bond during the past 25 years is giving chemistry a fillip in more ways than one as discussed by the authors, and it is providing a new lease of life to chemical synthesis where mechanical bond formation occurs as a consequence of the all-important templation orchestrated by molecular recognition and self-assembly.
Journal ArticleDOI
High-yielding, regiospecific synthesis of cis(4,4')-di(carbomethoxybenzo)-30-crown-10, its conversion to a pyridyl cryptand and strong complexation of 2,2'- and 4,4'-bipyridinium derivatives.
TL;DR: A high yielding (93%), regiospecific synthesis of cis(4,4')-di(carbomethoxybenzo)-30-crown-10 (1c) is reported.
Journal ArticleDOI
Syntheses of cis- and trans-dibenzo-30-crown-10 derivatives via regioselective routes and their complexations with paraquat and diquat.
TL;DR: Because the DB30C10 cavity has a better geometry fit with paraquat 3 than with diquat 4, 4-based complexes have much higher association constants than the corresponding 3-basedcomplexes, which is a possible reason for the increase in association constant from 2 x 4 to 1 x 4.
Journal ArticleDOI
Inclusion [2]complexes based on the cryptand/diquat recognition motif
TL;DR: In this paper, it was found that the improved binding from bis(m-phenylene)-32-crown-10 to bis(5-hydroxymethyl-1,3-phenylon)-32crown10 was due to a supersramolecular cryptand structure formed by chelation of the two terminal OH moieties of bis(1, 3)-phenylene with a water molecule as a hydrogen bonding bridge.