chloride (CuCl, 99.99%), oleylamine (OLAM,
>70%), octadecene (ODE, 90%), tri-n-octylphosphine
(TOP, 97%), trioctylphosphine oxide (TOPO, 99%), lithium bis(trimethylsilyl)amide
(LiN(SiMe3)2, 97%), N,N-dimethylethylenediamine (NND, ≥98.0%), mercury(II)
chloride (HgCl2, ≥99.5%), cadmium iodide (CdI2, 99%), lead(II) acetylacetonate (Pb(acac)2, ≥95%)
and tin(II) chloride (SnCl2, 98%) were purchased from Sigma-Aldrich,
tellurium powder (99.999%) and selenium powder (99.99%) from Strem
Chemicals, ethanol (anhydrous, ≥99.8%), methanol (anhydrous,
≥99.8%), toluene (anhydrous, ≥99%), and chloroform (anhydrous,
≥99%) from Carlo Erba reagents. All chemicals were used as
received without further purification, and all reactions were carried
out under nitrogen using standard air-free techniques.