A method for mesoporous supraparticle synthesis on superamphiphobic surfaces is designed. Therefore, supraparticles assembled with nanoparticles are synthesized by the evaporation of nanoparticle dispersion drops on the superamphiphobic surface. For synthesis, no further purification is required and no organic solvents are wasted. Moreover, by changing the conditions such as drop size and concentration, supraparticles of different sizes, compositions, and architectures are fabricated.

The novel heterobi- and heterotermetallocenes [Fc-NHCO-Cc]+ (1) and [Fc-NHCO-Cc-CONH-Fc]+ (2) have been prepared by amide coupling of aminoferrocene and cobaltocenium carboxylic acid or 1,1′-cobaltocenium dicarboxylic acid. Very small differences of the redox potentials, ΔG 0 ≈ 1 V, were observed due to the electron-donating and electron-withdrawing nature of the substituents at the ferrocene and cobaltocenium units, respectively. In accordance with this small zero-level energy difference, ΔG 0 is the low-energy MM’CT absorption that extends into the near-infrared spectral region. Large solvatochromic shifts were observed for 1 and 2 due to the pronounced difference in ground-state and excited-state dipole moments. The low-energy optical transitions were assigned as MM’CT transitions by DFT-PCM and TDDFT-PCM approaches, and the experimental negative solvatochromic effect has been reproduced by the TDDFT-PCM calculations.

A one-pot method was used to synthesize CuIn x Ga 1−x S 2 nanoparticles by substituting In 3+ with Ga 3+ . The samples with composition of gallium ranging from 0% to 100% were synthesized by solving copper chloride, indium trichloride, gallium acetylacetonate, and thiourea as precursors in 1-octadecene, oleylamine, and oleic acid as noncoordinating, coordinating, and capping agent solvents, respectively. Depending on the chemical composition and synthesis conditions, the morphology of the as-synthesized nanoparticles obtained was trigonal, semitrigonal, hexagonal, and quasispherical. X-ray photoelectron spectroscopy and X-ray diffraction confirmed that Ga 3+ substituted In 3+ without any segregation over a wide range. The as-synthesized CuIn x Ga 1−x S 2 nanoparticles showed narrow size distribution across the entire composition range (x = 0−1) and band gap tuned in the range from 1.44 to 2.28 eV. The morphology, structure, and optical properties of the synthesized nanoparticles were characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), UV− visible (UV−vis) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The mechanism of complex formation up to nanoparticle synthesis was also discussed.

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