Structure–property relationship of a complex photoluminescent arylacetylide-gold(I) compound. I: a pressure-induced phase transformation caught in the act DOI Creative Commons
Róża Dziewiątkowska, Tomasz Poręba,

Federico Cova

et al.

IUCrJ, Journal Year: 2024, Volume and Issue: 11(5), P. 737 - 743

Published: Aug. 23, 2024

A pressure-induced triclinic-to-monoclinic phase transition has been caught `in the act' over a wider series of high-pressure synchrotron diffraction experiments conducted on large, photoluminescent organo-gold(I) compound. Here, we describe mechanism this single-crystal-to-single-crystal transition, onset which occurs at ∼0.6 GPa, and report high-quality structure new monoclinic phase, refined using aspherical atomic scattering factors. Our case illustrates how conducting fast experiments, enabled by modern equipment facilities, can lead to overestimation actual pressure due slow transformation kinetics.

Language: Английский

Structural transition and emission enhancement in vacancy-ordered halide double perovskite Cs2TeCl6 under pressure DOI
Suvashree Mukherjee,

Debabrata Samanta,

Bidisha Mukherjee

et al.

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(14)

Published: April 1, 2025

The effect of pressure on the structural evolution, enhancement photoluminescence intensity, and optical bandgap a vacancy-ordered double halide perovskite, Cs2TeCl6, is investigated systematically. We use synchrotron x-ray diffraction, Raman spectroscopy, bandgap, measurements to explore properties Cs2TeCl6 under up 30.0 GPa. find that undergoes transition from cubic Fm3¯m monoclinic P21/n at very low below 1.0 A significant increase in intensity rapid decrease are observed, which related octahedral distortion transition. Interestingly, with increasing pressure, sample regains its ambient structure around 3.4 GPa, maintaining phase an iso-structural 14.1 GPa slight compressibility.

Language: Английский

Citations

0
Balance Between Energy Migration and Thermal Quenching: Solid Solution Strategy to Highly Boost the Quantum Yield of Copper(I)‐Iodide Cluster DOI

Yan‐Ting Huang,

Hao Zheng, Jianning Dong

et al.

Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 21, 2025

Abstract Cu(I)‐iodide clusters have attracted broad attention due to their outstanding photoluminescence properties. However, commercial viability is often constrained by moderate quantum yields. In this work, a solid solution strategy employed synthesize heterometallic cluster 3·Cu/Ag , achieving nearly 18‐ and 10‐fold enhancements in yield (up 86.10%) relative the monometallic 1·Cu 2·Ag respectively. Detailed investigations reveal an unprecedented mechanism balancing energy migration thermal quenching, which underlies intense emission distinct thermochromic behavior of under both cryogenic ambient conditions. These findings highlight potential applications luminescent thermometer, multicolor displays, solid‐state lighting technologies.

Language: Английский

Citations

0
Pressure-Induced Enhancement of Room-Temperature Phosphorescence in Heavy Halogen-Containing Imide and Polyimide DOI
Haonan Liu,

Ryuichi Isoda,

Marina Doi

et al.

The Journal of Physical Chemistry B, Journal Year: 2024, Volume and Issue: 128(31), P. 7690 - 7701

Published: July 26, 2024

To investigate the correlation between aggregated state and photoluminescence (PL) mechanism of dual fluorescent (FL) phosphorescent (PH) polyimides (PIs), photophysical processes FL-type BP-PI, PH-type DBrBP-PI, their corresponding imide model compounds (BP-MC DBrBP-MC) dispersed in poly(methyl methacrylate) (PMMA) films were analyzed at elevated pressures up to 8 GPa using a diamond anvil cell. Dibromo-substituted DBrBP-MC demonstrated shorter wavelength absorption than BP-MC owing larger dihedral angle biphenyl moiety. Both MCs exhibited red-shifts spectra with increasing pressure, indicating planarization occurred moieties associated compression free volume PMMA. The PL intensity increased while its quantum yield (ΦPL) decreased sharply due enhanced energy transfer via Förster mechanism. In contrast, PH (ΦPH) monotonically lower pressures, it showed excitation wavelength-dependent behaviors higher pressures: ΦPH remained unchanged under 340 nm but gradually 365 nm. This fact suggests that, promoted intersystem crossing (ISC) from excited singlet states levels. Using this phenomenon, significant pressure-induced enhancement (PIPE) was observed for DBrBP-PI 0.9 upon nm, which is rare phenomenon organic polymers. study indicates that even colorless optically transparent amorphous polymers, an restricted molecular motion intensified ISC outweighs deactivation intermolecular certain leading increase ΦPH.

Language: Английский

Citations

2
Multifunctional elastic benzoxazole derivative crystals for advanced optoelectronic applications DOI
Jiang Peng, Yuanyuan Liu, Jing Yang

et al.

Science China Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 7, 2024

Language: Английский

Citations

1
Pressure Affected Interface Effect in Nanoheterojunctions Formed by Au Nanoparticles Anchoring CsPbBr3 Nanocrystals DOI
Shuhao Zhang, Xinyu Liu,

Hongjian Qi

et al.

The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 3, 2024

Language: Английский

Citations

0
Structure–property relationship of a complex photoluminescent arylacetylide-gold(I) compound. I: a pressure-induced phase transformation caught in the act DOI Creative Commons
Róża Dziewiątkowska, Tomasz Poręba,

Federico Cova

et al.

IUCrJ, Journal Year: 2024, Volume and Issue: 11(5), P. 737 - 743

Published: Aug. 23, 2024

A pressure-induced triclinic-to-monoclinic phase transition has been caught `in the act' over a wider series of high-pressure synchrotron diffraction experiments conducted on large, photoluminescent organo-gold(I) compound. Here, we describe mechanism this single-crystal-to-single-crystal transition, onset which occurs at ∼0.6 GPa, and report high-quality structure new monoclinic phase, refined using aspherical atomic scattering factors. Our case illustrates how conducting fast experiments, enabled by modern equipment facilities, can lead to overestimation actual pressure due slow transformation kinetics.

Language: Английский

Citations

0