H₂MBH₂ and M(μ-H)₂BH₂ Molecules Isolated in Solid Argon: Interelement M–B and M–H–B Bonds (M = Ge, Sn)

Abstract

Laser-ablated boron atoms react with GeH molecules to form novel germylidene borane HGeBH, which undergoes a photochemical rearrangement to the germanium tetrahydroborate Ge(μ-H)BH upon irradiation with light of λ = 405 nm. For comparison, the boron atom reactions with SnH only gave the tin tetrahydroborate Sn(μ-H)BH. Infrared matrix-isolation spectroscopy with deuterium substitution and the state-of-the-art quantum-chemical calculations are used to identify these species in solid argon. A planar structure of HGeBH with an electron-deficient B-Ge bond with a partial multiple bond character (bond order = 1.5) is predicted by quantum-chemical calculations. In the case of M(μ-H)BH (M = Ge, Sn) two 3c-2e B-H-M hydrogen bridged bonds are formed by donation of electrons from the B-H σ-bonds into empty p-orbitals of M.

Solvothermal Synthesis of InOOH Nanospheres with Enhanced Photocatalytic Activity

“…30 The peak at 2923, 2853, 2347, and 740 cm −1 could be attributed to the characteristic of the C-H stretching and bending vibration. 31,32 The weak bands at 2008 cm −1 correspond to carbonyl species. 33 The peaks at 1000-1500 cm −1 correspond to the C-O stretching vibration.…”

“…42 Finally, the indium complexes could readily aggregate into InOOH nanosheet through van der Waals interactions during solvothermal process. 32 In comparison, when adding the acetic acid or nitric acid to the reaction system, the products will grow into spherical morphology. It's deduced that the H + adsorbed on the surface of nanomaterials would accelerate the aggregation of nanoparticles by molecular interaction into nanospheres with certain crystallographic orientation, resulting in the formation of spherical-shaped particles.…”

“…[9][10][11] Indium oxyhydroxide (InOOH) with a wide band gap of 3.6 eV has recently emerged as promising photocatalysts for the degradation of different organic pollutants under UV irradiation. Various InOOH nanostructures such as nanoparticles, 12 nanofibers, 13 nanowires, 14,15 nanorods, 16,17 nanotubes, 18 microspheres, 19,20 urchin-like structures, 21 hexagram, 22 and hollow nanostructures [23][24][25] have been prepared by hydrolysis reaction, hydrothermal/solvothermal methods, and template-assisted approaches. Nevertheless, InOOH was usually used as a precursor to prepare In 2 O 3 .…”

“…28 However, there are only a few reports regarding the photocatalytic properties of InOOH nanostructures. 12,22,29 Fu et al demonstrated that InOOH nanoparticles exhibited better photocatalytic performance and stability for benzene degradation than that of commercial TiO 2 (P25). 12 Yang et al prepared hexagram shaped InOOH nanostructure with exposed {020} facets, which shows higher photocatalytic activity than that of P25-TiO 2 for the degradation of Rhodamine B (RhB).…”

“…12 Yang et al prepared hexagram shaped InOOH nanostructure with exposed {020} facets, which shows higher photocatalytic activity than that of P25-TiO 2 for the degradation of Rhodamine B (RhB). 22 Li et al reported high-photocatalytic activity of InOOH nanoparticles for the degradation of benzene and RhB under UV light irradiation. 29 Herein, we report on a simple acetic acid-assisted solvothermal process for the synthesis of InOOH nanospheres with porous structures.…”