Vibration-Dependent Dual-Phosphorescent Cu Nanocluster with Remarkable Piezochromic Behavior.

The dual emission (DE) characteristics of atomically precise copper nanoclusters (Cu NCs) are of significant theoretical and practical interest. Despite this, the underlying mechanism driving DE in Cu NCs remains elusive, primarily due to the complexities of excited state processes. Herein, a novel [Cu(PPh)(C≡C-p-NHCH)]PF (Cu) NC, shielded by alkynyl and exhibiting DE, was synthesized.

Chirality-Dependent Structural Transformation in Chiral 2D Perovskites under High Pressure.

Chiral perovskites have attracted considerable attention owing to their potential applications in spintronic- and polarization-based optoelectronic devices. However, the structural chirality/asymmetry transfer mechanism between chiral organic ammoniums and achiral inorganic frameworks is still equivocal, especially under extreme conditions, as the systematic structural differences between chiral and achiral perovskites have been rarely explored. Herein, we successfully synthesized a pair of new enantiomeric chiral perovskite (/-3PYEA)PbI (3PYEA = CNHCHNH) and an achiral perovskite (-3PYEA)PbI.

Enantiomorphic Single Crystals of Linear Lead(II) Bromide Perovskitoids with White Circularly Polarized Emission.

Chiroptical hybrid organic-inorganic perovskites are emerging as a new class of promising materials with mirror optical signal responses for optoelectronic applications. However, chiroptical white-emission materials have been scarcely unearthed. Herein, four pairs of hybrid lead(II) bromide perovskitoids were obtained, namely, (R)- and (S)-(H MPz)PbBr (R/S-MPz=(R)-(-)/(S)-(+)-2-methylpiperazine) (1 and 2), (R)- and (S)-(H MPz) Pb Br ⋅2 DMAc (3 and 4), (R)- and (S)-(H MPz)PbBr ⋅0.

A multi-responsive indium-viologen hybrid with ultrafast-response photochromism and electrochromism.

A novel 0D organic-inorganic metal halide hybrid (CHNO)InCl·Cl (1) has been obtained by integrating the mono-viologen derivative with InCl. Compound 1 exhibits reversible and ultrafast UV/sunlight/X-ray induced photochromic properties, as well as excellent electrochromic performance, which is the first example of an indium-based organic-inorganic chromic hybrid.

Pressure-Triggered Blue Emission of Zero-Dimensional Organic Bismuth Bromide Perovskite.

Understanding the structure-property relationships in Zero-dimensional (0D) organic-inorganic metal halide perovskites (s) is essential for their use in optoelectronic applications. Moreover, increasing the emission intensity, particularly for blue emission, is considerably a challenge. Here, intriguing pressure-induced emission () is successfully achieved from an initially nonluminous 0D [(CHNH)BiBr]Br·CHCN ( ) upon compression.

Thermochromism and piezochromism of an atomically precise high-nuclearity silver sulfide nanocluster.

A novel high-nuclearity silver sulfide nanocluster [AgS(SCHF)(dppp)]·4DMI, (hereafter abbreviated as 1⋅4DMI) was synthesised. Solvent-free crystals of 1 displayed a completely reversible narrowing and broadening of the optical band gap that was accompanied by visual thermochromism and piezochromism changeovers, when stimulated by varying temperatures between 113 and 413 K or by changing the pressure from 1 atm to 7.5 GPa.

Circularly Polarized Luminescence from Achiral Single Crystals of Hybrid Manganese Halides.

[K(dibenzo-18-crown-6)] () cations are used for cocrystallization with manganese halides, producing isostructural single crystals of organic-inorganic hybrid complexes, [K(dibenzo-18-crown-6)]MnX (abbreviated ) (X = Cl, Br), which feature one-dimensional morphology and green phosphorescence with considerable photoluminescence quantum yields accompanied by excellent optical waveguide behavior with a low loss coefficient. More interestingly, crystallizes in the monoclinic space group belonging to the achiral point group (), where the non-centrosymmetric arrangement of racemic units, with right- and left-handed rotating optical axes, endows these achiral single crystals with circularly polarized luminescence, observed for the first time.

Thermoinduced structural-transformation and thermochromic luminescence in organic manganese chloride crystals.

The [MnCl] mode of red emissive (CNOH)MnCl·CHOH under thermal treatment will be cleaved into [MnCl] in the green emissive (CNOH)MnCl with the departure of ethanol. The rapid conversion of luminescence from red to green provides new insight into the luminescence origin and thermal stability of organic-inorganic metal halide hybrids.