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6 protocols using tetrahydrofuran

1

High-Porosity Melamine Foams for AgNPs

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Commercial melamine (ME) foams with high porosity (0.994), open pores, and mean pore size below 500 μm were kindly provided by Flexicel Industrial S.L. (Spain). Silver nitrate (AgNO3) and tetrahydrofuran (THF) were purchased from Scharlab S.L. (Spain). Deionized water was employed for the preparation of the silver nanoparticles (AgNPs) precursor solutions as well as for the rinsing of the foams.
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2

Anion Exchange Resin Characterization

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Sodium hypochlorite (NaClO, 14%), tetrahydrofuran (THF), sodium chloride (NaCl), sodium sulfate (Na2SO4) and sodium nitrate (NaNO3) were purchased from Scharlab S.L., Barcelona, Spain Polyvinylchloride (PVC, Mw = 112,000 g·mol−1) was supplied by ATOCHEM S.A., Madrid, Spain. Amberlite® IRA-402 and Lewatit® Sybron Ionac® SR-7 anion exchange resins were supplied by Merck KGaA, Darmstadt, Germany. Purolite® A600/9413 anion exchange resin was supplied by MemBrain® s.r.o., Stráž pod Ralskem, Czech Republic. The characteristics of the anion exchange resins are reported in Table 1. MilliQ water was used throughout the experiments.
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3

Synthesis of Functionalized Silica Nanoparticles

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L-tryptophan (98%), decanoyl chloride (98%), sodium hydroxide (97%), sodium bicarbonate (97%), 3-aminopropyl trimethoxysilane (97%), tetraethyl orthosilicate (98%), butyric acid (99%), cetyltrimethylammonium bromide (99%), and dichloromethane (99.8%) were purchased from Sigma-Aldrich (St. Louis, MO, USA). Tetrahydrofuran (TFH, 99.5%), hydrochloric acid (35% w/w), oleic acid (99%), palmitic acid (99%), citric acid (99%), ammonia solution (32% w/w), iron (III) chloride (97%), iron (II) chloride tetrahydrate (99%), and sodium chloride (99.5%) were supplied by Scharlab (Barcelona, Spain).
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4

Synthesis and Characterization of OEGMA-AEMA Copolymers

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Oligo(ethylene glycol) methyl ether methacrylate (OEGMA) (average Mn∼ 300 Da), (2-acetoacetoxy)ethyl methacrylate (AEMA) (95%), 2,2-azobis(2-methylpropionitrile) (AIBN) (≥98%), triethylamine (Et3N) (>99%), 1,4-dioxane (anhydrous, 99.8%), n-hexane (anhydrous, 95%), ethyl acetate (anhydrous, 99.8%), deuterated dimethyl sulphoxide (DMSO-d6) (99.9 atom % D), 4-cyano-4-(thiobenzoylthio)pentanoic acid (≥97%), 4-nitrophenol (≥99%), nitrobenzene (≥99%), 3-(4-nitrophenyl)-1,3-oxazolidin-2-one (95%), chloroform (CHCl3) (≥99%), and deuterated chloroform (CDCl3) (99.8 atom % D) were supplied by Merk (Sigma-Aldrich) (Madrid, Spain). Tetrachloroauric (III) acid trihydrate (99%) was supplied by Thermo Scientific (Eindhoven, The Netherlands). Methanol (MeOH, analytical grade) and tetrahydrofuran (THF, GPC grade) were supplied by Scharlau (Barcelona, Spain). Deionized water was obtained from a Thermo Scientific apparatus (Barnstead TII Pure Water System) (Eindhoven, The Netherlands).
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5

Dexamethasone-loaded Polymeric Nanoparticles

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Dexamethasone base was procured from Alborz bulk pharmaceutical co. (Tehran, Iran).
ε-caprolactone, stannous octoate (Sn(Oct)2), and pyrene were purchased from Sigma-Aldrich (St Louis, USA). PEG1500, di-sodium hydrogen phosphate, potassium di-hydrogen phosphate, sodium chloride, calcium chloride, potassium chloride dihydrate, sodium hydrogen-carbonate, and sodium di-hydrogen phosphate dihydrate, were obtained from Merck (Darmstadt, Germany). Acetonitrile, tetrahydrofuran, dichloromethane, and diethyl ether were bought from Scharlau (Barcelona, Spain), and Maxidex® (dexamethasone 0.1%) sterile ophthalmic suspension was procured from Alcon® (Hünenberg, Switzerland SA). All solvents and reagents utilized in this study were of analytical grade, and deionized water was used during the HPLC procedure.
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6

Synthesis of Hollow-Shell Materials

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(97%), tetraethyl orthosilicate (98%) and dicloromethane (99.8%) were purchased from Sigma-Aldrich. Tetrahydrofuran (99.5%), hydrochloric acid (35% w/w) and sodium chloride (99.5%) were supplied by Scharlab.
The methodology for the development of hollow-shell or solid materials (named as HMSNs) can be summarized in two stages: the synthesis of DSDA surfactants and L-Dopa@MSN by a sol-gel process.
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