Issue 46, 2021

Exotic nuclear spin behavior in dendritic macromolecules


Dendrimers are a class of branched, highly symmetric macromolecules that have been shown to be useful for a vast number of different applications. Potential uses as fluorescence sensors, in catalysis and perhaps most importantly in medical applications as drug delivery systems or cytotoxica have been proposed. Herein we report on an exotic behaviour of the nuclear spins in a dendritic macromolecule in the presence of different paramagnetic ions. We show that the stability of the long lived nuclear singlet state, is affected by the presence of Cu(II), whereas other ions did not have any influence at all. This effect could not be observed in the case of a simple tripeptide, in which the nuclear singlet stability was influenced by all investigated paramagnetic ions, a potentially useful effect in the development of Cu(II) selective probes. By adding a fluorescent marker to our molecule we could show that the nuclear singlet multimer (NUSIMER) is taken up by living cells. Furthermore we were able to show that nuclear singlet state NMR can be used to investigate the NUSIMER in the presence of living cells, showing that an application in in vivo NMR can be feasible.

Graphical abstract: Exotic nuclear spin behavior in dendritic macromolecules

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Article information

Article type
30 Sep 2021
12 Nov 2021
First published
12 Nov 2021
This article is Open Access
Creative Commons BY license

Phys. Chem. Chem. Phys., 2021,23, 26349-26355

Exotic nuclear spin behavior in dendritic macromolecules

P. Saul, S. Yang, S. Mamone, F. Opazo, A. Meyer, S. O. Rizzoli and S. Glöggler, Phys. Chem. Chem. Phys., 2021, 23, 26349 DOI: 10.1039/D1CP04483D

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