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. 2018 Jun 14;8(6):434. doi: 10.3390/nano8060434

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© 2018 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 — Synthesis of functionalized mesoporous silica nanoparticles (FMSNs). Reaction of benzothiazole ligand (hpbtz) with 3-isocyanatopropyltriethoxysilane (ICTES) and 3-iodopropyltrimethoxysilane (IPTMS) generates c and d in the presence of different bases. The reaction of the post functionalized materials with ICTES and IPTMS under a nitrogen atmosphere with MSNs, forms the hpbtz loaded materials, e1–e3 and f1–f3, respectively. The resulting products are labeled as MSN-Et₃N-IPTMS-hpbtz-f1, MSN-pyridine-IPTMS-hpbtz-f2, MSN-NaOH-IPTMS-hpbtz-f3, MSN-Et₃N-NCO-hpbtz-e1, MSN-pyridine-NCO-hpbtz-e2, and MSN-NaOH-NCO-hpbtz-e3.