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. 2017 Dec 22;4:37. doi: 10.1186/s40580-017-0132-z

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© The Author(s) 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 4 — a Structure of carboxylic acid-derivatized polymer, PS-Ru-A. b Cartoon of PS-Ru-A anchored to a TiO₂ nanoparticle surface. c Schematic representation of the photophysical events of the PS-Ru-A assembly at the surface of TiO₂. The blue circles represent Ru(L)32 + chromophores while the green and red circles correspond to Ru(L)³⁺₃ and Ru(L)^2+*₃

(Reproduced with permission from Ref. [18]. Copyright 2016, Wiley–VCH Verlag Gmbh & Co)