Search

Herein we report, the synthesis of single‐atom iron on nitrogen‐doped carbon as a catalyst for the direct formation of Csp3−S bond via borrowing hydrogen strategy using alcohols as the alkylating agent. The catalyst was synthesized by encapsulating ferrocene within the ZIF‐8 framework, followed by pyrolysis and characterized precisely by FE‐SEM, HR‐TEM, XPS, Raman, XRD and EXAFS. The catalyst is robust, displayed an excellent reactivity in borrowing hydrogen reaction and could be recycled five times without any appreciable loss in activity. Fe single atom on nitrogen doped carbon as efficient, bench stable and recyclable catalyst for S‐benzyl/alkylation of dithiocarbamates viaborrowing hydrogen strategy. A wide range of functional groups are well tolerated and gave the desired dithiocarbamate products in good to excellent yields.

Owing to its indirect band gap, an all-inorganic, lead-free halide double perovskite generally tends to exhibit a low photoluminescence efficiency, thus restricting its applicability as a photovoltaic material. Cs2AgBiCl6is one of the stable halide double perovskites with an indirect band gap of 2.7 eV. Its optoelectronic properties can be enhanced by partially replacing some of the Ag ions with the isovalent Na ions, forming Cs2NaxAg1–xBiCl6compositions. The origin of enhanced photoluminescence in these mixed compositions is speculated to be the competitive interaction of both radiative and nonradiative transition, highly influenced by electron–phonon coupling. However, a concrete understanding of the electron–phonon coupling phenomenon and an estimate of its strength is still lacking. Our investigations reveal that the de-excitation process involves decay through trap states formed in the substituted compositions. A quantitative analysis of Raman spectra along with the composition-dependent Urbach tail states and Fano broadening reveals a better understanding of trap state stabilization via strong electron–phonon interaction.