Volume 58, Issue 33 pp. 11344-11349
Communication

Pathway Control in Cooperative vs. Anti-Cooperative Supramolecular Polymers

Lorena Herkert

Lorena Herkert

Organisch-Chemisches Institut, Westfälische-Wilhelms Universität Münster, Corrensstraße 40, 48149 Münster, Germany

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Jörn Droste

Jörn Droste

Institut für Physikalische Chemie, Westfälische-Wilhelms Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany

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Dr. Kalathil K. Kartha

Dr. Kalathil K. Kartha

Organisch-Chemisches Institut, Westfälische-Wilhelms Universität Münster, Corrensstraße 40, 48149 Münster, Germany

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Dr. Peter A. Korevaar

Dr. Peter A. Korevaar

Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands

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Prof. Dr. Tom F. A. de Greef

Prof. Dr. Tom F. A. de Greef

Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands

Institute for Complex Molecular Systems, Department of Biomedical Engineering, Eindhoven University of Technology, The Netherlands

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Prof. Dr. Michael Ryan Hansen

Prof. Dr. Michael Ryan Hansen

Institut für Physikalische Chemie, Westfälische-Wilhelms Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany

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Prof. Dr. Gustavo Fernández

Corresponding Author

Prof. Dr. Gustavo Fernández

Organisch-Chemisches Institut, Westfälische-Wilhelms Universität Münster, Corrensstraße 40, 48149 Münster, Germany

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First published: 22 May 2019
Citations: 71

Graphical Abstract

Side-chain immiscibility allows full control over the formation of a highly stable, discrete anti-cooperative assembly that is in competition with the formation of cooperative supramolecular polymers, which may open up new strategies for pathway control in self-assembly.

Abstract

Controlling the nanoscale morphology in assemblies of π-conjugated molecules is key to developing supramolecular functional materials. Here, we report an unsymmetrically substituted amphiphilic PtII complex 1 that shows unique self-assembly behavior in nonpolar media, providing two competing anti-cooperative and cooperative pathways with distinct molecular arrangement (long- vs. medium-slipped, respectively) and nanoscale morphology (discs vs. fibers, respectively). With a thermodynamic model, we unravel the competition between the anti-cooperative and cooperative pathways: buffering of monomers into small-sized, anti-cooperative species affects the formation of elongated assemblies, which might open up new strategies for pathway control in self-assembly. Our findings reveal that side-chain immiscibility is an efficient method to control anti-cooperative assemblies and pathway complexity in general.

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