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Polymers 2018, 10(5), 528; https://doi.org/10.3390/polym10050528

Self-Organization and Swelling of Ruthenium-Metal Coordination Polymers with PTA (Metal = Ag, Au, Co)

1
NanoLab, Department of Chemistry and Physics, University of Almeria, 04120 Almeria, Spain
2
Inorganic Chemistry Lab-CIESOL, Department of Chemistry and Physics, University of Almeria, 04120 Almeria, Spain
3
ISIS Pulsed Neutron and Muon Source, Rutherford Appleton Laboratory, Harwell Science & Innovation Campus, Chilton, Didcot OX11 0QX, UK
4
Institute of Applied Chemical Sciences, Universidad Autonoma de Chile, Santiago 8320000, Chile
*
Author to whom correspondence should be addressed.
Received: 9 April 2018 / Revised: 9 May 2018 / Accepted: 11 May 2018 / Published: 15 May 2018
(This article belongs to the Special Issue Selected Papers from "ECIS 2017")
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Abstract

We present the internal structure and dynamics of novel coordination polymers based on two metal-containing moieties Ru-X (X: Ag, Au, Co), bridged through the phosphine PTA (3,5,7-triaza-phosphaadamantane). X-ray scattering gives the heterometallic polymer organization. Quasi-elastic neutron scattering measurements over a broad temperature range show a transition from vibrational Debye-Waller behavior to a more dynamically active state, but with rather localized motions, coinciding with the loss of structural water at around room temperature. Light scattering reveals that the polymers self-associate to form stable micro-particles in aqueous solution with a thermally driven volume transition. This is described by the Flory theory for polymers in solution, in which the polymer solvency is calculated as a function of the temperature. Polymer self-organization is further studied by small-angle neutron scattering and electron microscopy. A polymer parallel-plane model with gaps controlled by the environmental temperature is proposed. View Full-Text
Keywords: organometallic; ruthenium complexes; polymer dynamics; quasi-elastic neutron scattering; small-angle neutron scattering; light scattering organometallic; ruthenium complexes; polymer dynamics; quasi-elastic neutron scattering; small-angle neutron scattering; light scattering
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Sierra-Martin, B.; Serrano-Ruiz, M.; García-Sakai, V.; Scalambra, F.; Romerosa, A.; Fernandez-Barbero, A. Self-Organization and Swelling of Ruthenium-Metal Coordination Polymers with PTA (Metal = Ag, Au, Co). Polymers 2018, 10, 528.

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