Rational Design of a Super-Alkali Compound with Reversible Photoluminescence

Abstract

The zero-dimensional (0D) (H5O2)(C4H14N2S2)2BiCl8: Sb3+ single crystal is obtained by the cooling crystallization method. Surprisingly, this compound shows reversible photoluminescence (PL) upon H5O2 +Cl– removal and insertion. To be specific, the release of H5O2 +Cl– resulted in red-orange emission with a very low photoluminescence quantum yield (PLQY). While on the reuptake of it, a bright yellow emission with a nearly 10-fold increase of PLQY was observed. Density functional theory (DFT) calculations and temperature-dependent PL experiments reveal that significant [SbCl6]3– octahedron distortion induced by guest (H5O2 +Cl–) removal at the ground state, especially at the excited state, is responsible for the disparate PL performance. Encouragingly, we also found that (C4H14N2S2)2BiCl7: Sb3+ exhibits a fast response (<3 s) to dilute hydrochloric acid with naked-eye perceivable PL color changes, rendering it a potential sensing material for hydrochloric acid.

Graphene-based iron single-atom catalysts for electrocatalytic nitric oxide reduction: a first-principles study

“…Therefore, rationally designing efficient and stable electrocatalysts for NORR poses a great challenge and has been gaining increasing attention from scientific communities. [8][9][10] Single-atom catalysts (SACs) have been intensively investigated in heterogenous catalysis, both experimentally and theoretically, due to their unique geometric and electronic structures, as well as their tunable local coordination environment, which provides an efficient route to modulate the electronic structure and catalytic efficiency of SACs. 11,12 Especially due to their ultra-high conductivity and complete coordination tunability, graphene-based Fe SACs have been widely explored for various electrocatalytic reactions, such as the oxygen reduction reaction (ORR) 13,14 and the nitrate (NO 3 − ) reduction reaction (NO 3 RR).…”

Thermal and Vapor Induced Triple‐Mode Luminescent Switch of Manganese (II) Halides Hybrid

“…They exhibit superb luminescent characteristics, including high luminescent efficiency, [ 12,13 ] tunable emission color, [ 14 ] and robust stability against moisture [ 15 ] and light. [ 16 ] Various photoluminescent mechanisms, including d–d transition, [ 17–19 ] magnetic coupling, [ 20,21 ] and self‐trapped exciton emission, [ 22,23 ] collectively contribute to the rich photoluminescent characteristics. To date, Mn‐based metal halides have exhibited substantial potential in numerous applications.…”

Facile solvothermal preparation of an organic hybrid dysprosium selenidoantimonate for an efficient oxygen evolution reaction

“…Clean and renewable hydrogen (H 2 ) energy has been considered as a green substitute for traditional fossil fuels, because of its high enthalpy and non-polluting properties. 1 Water splitting driven by electricity for H 2 generation is a prospective approach for renewable energy storage and conversion. However, the sluggish kinetics of the OER coupled with a four-electron-transfer process (2H 2 O → O 2 + 4H + + 4e − ) seriously limit the overall water splitting efficiency, owing to the existence of higher anodic overpotentials.…”