Ester Interchange Reactions of Long Chain Thiol Esters1

1957 ◽  
Vol 22 (10) ◽  
pp. 1183-1184 ◽  
Author(s):  
GEORGE S. SASIN ◽  
PAUL R. SCHAEFFER ◽  
RICHARD SASIN
Keyword(s):  
Ester Interchange ◽  
Long Chain ◽  
Interchange Reactions

Sequence-Modification in Copoly(ester-Imide)s: A Catalytic/supramolecular Approach to Writing/reading Copolymer Sequence-Information

2020 ◽  
Author(s):  
Marcus Knappert ◽  
Howard Colquhoun
Keyword(s):  
Ring Current ◽  
Sequence Information ◽  
Nmr Analysis ◽  
Ester Interchange ◽  
H Nmr ◽  
Sequence Exchange ◽  
Supramolecular Complexation ◽  
Different Levels ◽  
Sequence Modification ◽  
Interchange Reactions

Catalytic ester-interchange reactions, analogous to mutation and recombination, allow new sequence-information to be written, statistically, into NDI-based poly(ester-imide) chains. Thus, insertion of the cyclic ester cyclopentadecanolide ("exaltolide") into an NDI-based homopolymer, and quantitative sequence-exchange between two different homopoly(ester-imide)s, are catalysed by di-<i>n</i>-butyl tin(IV) oxide. Emerging sequences are identified at the triplet and quintet levels by <sup>1</sup>H NMR analysis, using supramolecular complexation of pyrene-<i>d</i><sub>10</sub> at the NDI residues to amplify the separation of resonances associated with different sequences. In such systems, pyrene is able to act as a "reader-molecule" by generating different levels of ring-current shielding from the different patterns of supramolecular binding to all the NDI-centred sequences of a given length.

Effects of Ester Interchange Reactions on the Phase Behavior of an Immiscible Polyester Blend:  Monte Carlo Simulation

1999 ◽  
Vol 32 (5) ◽  
pp. 1679-1685 ◽  
Author(s):  
Won Ho Jo ◽  
Jong Geun Kim ◽  
Seung Soon Jang ◽  
Ji Ho Youk ◽  
Sang Cheol Lee
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Phase Behavior ◽  
Ester Interchange ◽  
Interchange Reactions

scholarly journals Sequence modification in copoly(ester-imide)s: a catalytic/supramolecular approach to the evolution and reading of copolymer sequence information

2021 ◽  
Author(s):  
Marcus Knappert ◽  
Howard M. Colquhoun
Keyword(s):  
Ring Current ◽  
Cyclic Ester ◽  
Sequence Information ◽  
Ester Interchange ◽  
H Nmr ◽  
Sequence Exchange ◽  
Supramolecular Complexation ◽  
Different Levels ◽  
Sequence Modification ◽  
Interchange Reactions

AbstractCatalytic ester-interchange reactions, analogous to mutation and recombination, allow new sequence information to be written statistically into poly(ester-imide) chains based on NDI (1,4,5,8-naphthalenetetracarboxylic diimide) units. Thus, both the insertion of the cyclic ester cyclopentadecanolide (“exaltolide”) into an NDI-based homopolymer and quantitative sequence exchange between two different homopoly(ester-imide)s are catalyzed by di-n-butyl tin(IV) oxide. Emerging sequences are identified at the triplet and quintet levels using supramolecular complexation of pyrene-d10 at the NDI residues to amplify the separation of 1H NMR resonances associated with different sequences. In such systems, pyrene is able to act as a “reader molecule” by generating different levels of ring-current shielding from the different patterns of supramolecular binding to all NDI-centered sequences of a given length.

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