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. 2020 Oct 27;25(21):4965. doi: 10.3390/molecules25214965

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Scheme 1 — Synthetic scheme for the synthesis of POSSPs 1–3. The synthesis of POSSPs 1 and 2 follow a similar approach. First, heptaisobutyl- or heptapheyl-trisilanol POSS was functionalized with aminopropyl trimethoxysilane under basic conditions, followed by transforming the amine to a cyanate group using triphosgene. Finally, 5-(4-aminophenyl)-10,15,20(triphenyl)porphyrin reacted with either the isobutyl (compound 2) or the phenyl (compound 4) version of POSS cyanate derivative to afford POSSP 1 or 2, respectively. The synthesis of POSSP 3 was carried out by reacting compound 2 with 5,10,15,20-tetrakis(4-aminophenyl)porphyrin.