Inverse Kinetic and Equilibrium Isotope Effects on Self-Assembly and Supramolecular Chirality of Porphyrin J-Aggregates.
Chemistry
; 23(1): 70-74, 2017 01 01.
Article
em En
| MEDLINE
| ID: mdl-27862435
ABSTRACT
When mixtures of D2 O/DCl are used to foster the self-assembly formation of TPPS4 porphyrin J-aggregates in aqueous solutions, an inverse kinetic isotope effect of 0.4 and an inverse equilibrium isotope effect of 0.6 are clearly detected. Most importantly, the addition of at least 10 % D2 O causes an inversion in the handedness of the final chiral J-aggregates, thus evidencing an important role of deuterium in driving the enantiomeric excess in the scalemic mixture of such supramolecular assemblies.
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MEDLINE
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Porfirinas
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En
Ano de publicação:
2017
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Article