Trimethyl aluminum

Molecule A was synthesized according to a previously published procedure [3 (link)]. Zinc acetate dihydrate (Alfa Aesar, Tewksbury, MA, USA), trimethyl aluminum (Strem Chemicals, Newburyport, MA, USA; prepackaged in a 50 mL Swagelok cylinder), ultrahigh purity water (Strem Chemicals, Newburyport, MA, USA; prepackaged in a 50 mL Swagelok cylinder), acetonitrile (Sigma-Aldrich, Milwaukee, WI, USA), methanol (Sigma-Aldrich, Milwaukee, WI, USA), dimethyl sulfoxide (DMSO, Alfa Aesar), ethanol (Koptec), hydrochloric acid (Sigma-Aldrich, Milwaukee, WI, USA), zirconium (IV) propoxide solution (Sigma-Aldrich, Milwaukee, WI, USA), nitric acid (Avantar, Radnor, PA, USA), polyethylene glycol bisphenol A epichlorohydrin copolymer (Sigma-Aldrich, Milwaukee, WI, USA) were purchased from their respective suppliers, in parentheses, and used as received. Non-conductive glass was purchased from Hartford Glass Co. (Hartford, CT, USA). Vac’n Fill Syringe (65209) and Melatonix films (1170-25) were purchased from Solaronix (Aubonne, Switzerland). Micro glass cover slides (18 × 18 mm) were purchased from VWR (Radnor, PA, USA).

All reactions other than ligand syntheses were performed under an inert atmosphere of argon using either glovebox or Schlenk line techniques. Toluene and hexane were distilled from sodium and phosphorus pentoxide respectively. Trimethylaluminum and trimethylgallium were purchased from Strem Chemicals and used as received.
¹H and ¹³C NMR were obtained at 500 MHz and 125 MHz, respectively, in benzene-d₆. Infrared spectra were obtained using Nujol as the medium. Elemental analyses were performed by Midwest Microlab, Indianapolis, IN. Melting points were obtained on a Haake-Buchler HBI digital melting point apparatus and were uncorrected.