A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 144978-35-8, Name is 1-Boc-D-Pyroglutamic acid ethyl ester, molecular formula is C12H19NO5. In an article, author is Nebel, Natascha,once mentioned of 144978-35-8, Recommanded Product: 144978-35-8.
The stimuli-responsive supramolecular co-assembly of two pi-amphiphiles, NDI-1 and Py-1, in which an acceptor (A) (naphthalene diimide) and a donor (D) (pyrene) chromophore, respectively, serve as the hydrophobic segment, is described. In addition, both contain an amide group in a designated location so that H-bonding and D-A charge-transfer (CT) interactions can operate simultaneously. H-bonding among the amide groups not only enhanced the CT interaction promoted by the alternating D-A stacking propensity, but also fixed the lateral orientation of the two chromophores and thus compelled the anionic and nonionic hydrophilic head groups, appended with the D and A amphiphiles, respectively, to remain segregated on two opposite sides of the amphiphilic alternating supramolecular copolymer. This copolymer showed spontaneous polymersome assembly with the D-appended anionic groups displayed at the outer surface, whereas the A-appended hydrophilic wedge converged at the inner lacuna. In contrast, spherical or cylindrical micellar structures were produced by Py-1 and NDI-1, respectively. Effective functional-group display in the D-A supramolecular polymersome enabled protein-surface recognition and inhibition of the enzymatic activity of Cht. Under a reducing environment, formation of NDI center dot- jeopardized the D-A interaction and thus the A chromophores were ejected out of the membrane of the polymersome causing its gradual contraction in size by >75%. D-A supramolecular polymersomes also exhibited a lower critical solution temperature that could be tuned across a temperature window of 40 to 70 degrees C by varying the ratio of the A and D components in the alternating supramolecular copolymer.
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Reference:
Amide – Wikipedia,
,Amide – an overview | ScienceDirect Topics