Raffaele Battistuzzi

Bio: Raffaele Battistuzzi is an academic researcher from University of Modena and Reggio Emilia. The author has contributed to research in topics: Thiourea & Triphenylphosphine. The author has an hindex of 12, co-authored 41 publications receiving 302 citations.

Copper(I) complexes of neutral, deprotonated and protonated 4,6-dimethylpyrimidine-2 (1H)-thione

Abstract: The following copper(I) complexes of 4,6-dimethylpyrimidine-2(1H)-thione (HL), its protonated cation (H2L+) and deprotonated anion (L−) have been prepared: CuL, Cu(HL)X (X = Cl, Br or I), Cu(HL)2X (X = C1 or Br), Cu2(HL)3Br2, Cu(H2L)X2 (X = Cl or Br), Cu3(HL)2LA2 (A = ClO4 or BF4 ). The i.r. spectra show that in all the HL and L− complexes and in the Cu(H2L)Br2 complex, the ligands are S, N coordinated to the metal ion, while in Cu(H2L)Cl2 only the thiocarbonylic sulphur is coordinated, probably bridging two copper(I) atoms. Thev(CuN) (288–317 cm−1 ) andv(CuS) (191–225 cm−1 ) have uniform frequency values in all the complexes. The halide ions are, in all their complexes, wholly or in part coordinated giving twov(CuX) bands which may indicate an asymmetrical Cu-X ⋯Cu halide bridging bond.

Silver(I) complexes of 4,6-dimethylpyrimidine-2(1H)-thione

Abstract: The following silver(I) complexes of 4,6-dimethylpyrimidine-2(1H)-thione (HL) have been prepared and investigated by conductometric, infrared, and Raman methods: Ag(HL)X (X = Cl, Br, I, SCN), Ag(HL)2X (X = Cl, Br, I, NO3 (MeOH), ClO4 (0.25CHCl3), BF4 (0.25CHCl3)), AgmXn(H2L)n–m (X = Cl: m = 6, n = 11; Br: m = 2, n = 3; I: m = 5, n = 7), AgL, AgL•Ag(HL)NO3, AgL•[Ag(HL)X]2 (X = ClO4, BF4). The HL acts as N,S-chelating ligand in the Ag(HL)X and Ag(HL)2X (X = NO3,ClO4, BF4) complexes and partially in the Ag(HL)2X (X = Cl, Br, I) complexes in which the halide ion is still coordinated. In the AgmXn(H2L)n–m complexes the H2L+ ion is at least partially S-coordinated to some silver ions. In AgL, L− acts as tridentate ligand N,N,S-bridging the silver ions. In the AgL•Ag(HL)NO3 complex the nitrate ion is coordinated.

A tunable library of substituted thiourea precursors to metal sulfide nanocrystals

Abstract: Controlling the size of colloidal nanocrystals is essential to optimizing their performance in optoelectronic devices, catalysis, and imaging applications. Traditional synthetic methods control size by terminating the growth, an approach that limits the reaction yield and causes batch-to-batch variability. Herein we report a library of thioureas whose substitution pattern tunes their conversion reactivity over more than five orders of magnitude and demonstrate that faster thiourea conversion kinetics increases the extent of crystal nucleation. Tunable kinetics thereby allows the nanocrystal concentration to be adjusted and a desired crystal size to be prepared at full conversion. Controlled precursor reactivity and quantitative conversion improve the batch-to-batch consistency of the final nanocrystal size at industrially relevant reaction scales.