Halogen-Dependent Deep-Blue Circularly Polarized Emitters with Ultrahigh-Color-Purity Under High Pressure DOI
Shuang‐Quan Zang,

Meng‐En Sun,

Fei Wang

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: July 18, 2024

Abstract Achieving free exciton (FE) emission in low-dimensional (2D, 1D, and 0D) metal halide perovskites is challenging due to the strong electron–phonon coupling effect induced by lead octahedral distortion. Herein, FE behaviors of three new 2D chiral perovskites, (R-3-XPEA)2PbBr4 (PEA = phenethylamine, X F, Cl, Br), were investigated under hydrostatic pressure. (R-3-BrPEA)2PbBr4 (R-3-ClPEA)2PbBr4 exhibited high color–purity deep-blue circularly polarized luminescence (CPL) dominated at pressures 1.7 2.5 GPa, respectively, whereas (R-3-FPEA)2PbBr4 presented broadband warm-white CPL The structural analysis theoretical calculation results demonstrated that pressure reduced penetration depths R-3-BrPEA+ and R-3-ClPEA+ into [PbBr6]4- inorganic frameworks strengthening halogen···halogen (Br···Br Cl···Cl) interactions between organic amines, resulting smaller distortion weaker (R-3-ClPEA)2PbBr4. Thus, pressure-driven enhancement was responsible for remarkable Conversely, could not be effectively suppressed owing lack interactions, leading absence CPL. Our work gives a insight into intrinsic structure-property relationship noncovalent ultrahigh-color-purity behavior perovskites.

Language: Английский

Photocurrent, electrochemical characteristic and photodegradation of two Ag20 cage isomers co-constructed by thiol and carboxylate/sulfonate and induced by CO32– template DOI Creative Commons

Wen-Xuan Xie,

Li Li, Kun Zhou

et al.

Journal of Saudi Chemical Society, Journal Year: 2024, Volume and Issue: 28(4), P. 101885 - 101885

Published: May 27, 2024

Assembly of AgStBu and PhCOOH ligands with the assistance soluble silver salt CH3COOAg/CF3SO3Ag in methanol, N, N-dimethylformamide (DMF) dichloromethane solution, yielded two Ag20 cage isomers co-constructed by thiol carboxylate/sulfonate ligand encapsulating a CO32– anion template, [(CO32–)@Ag20(StBu)10(PhCOO)4(CH3COO)4(DMF)4] (1) [(CO32–)@Ag20(StBu)10(PhCOO)6(CF3SO3)2(DMF)4]·2DMF (2). The template was generated situ fixing atmospheric CO2. precise structures 1 2 were confirmed single-crystal X-ray diffractometry (SCXRD). thermal stability compounds proved thermogravimetric (TG) analysis, their solution characterized nuclear magnetic resonance hydrogen spectroscopy (1H NMR). absorption spectra, photocurrent responses, luminescence investigated. In addition, photodegradation methylene blue (MB) cyclic voltammetry characteristic curves also studied

Language: Английский

Citations

0
Halogen-Dependent Deep-Blue Circularly Polarized Emitters with Ultrahigh-Color-Purity Under High Pressure DOI
Shuang‐Quan Zang,

Meng‐En Sun,

Fei Wang

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: July 18, 2024

Abstract Achieving free exciton (FE) emission in low-dimensional (2D, 1D, and 0D) metal halide perovskites is challenging due to the strong electron–phonon coupling effect induced by lead octahedral distortion. Herein, FE behaviors of three new 2D chiral perovskites, (R-3-XPEA)2PbBr4 (PEA = phenethylamine, X F, Cl, Br), were investigated under hydrostatic pressure. (R-3-BrPEA)2PbBr4 (R-3-ClPEA)2PbBr4 exhibited high color–purity deep-blue circularly polarized luminescence (CPL) dominated at pressures 1.7 2.5 GPa, respectively, whereas (R-3-FPEA)2PbBr4 presented broadband warm-white CPL The structural analysis theoretical calculation results demonstrated that pressure reduced penetration depths R-3-BrPEA+ and R-3-ClPEA+ into [PbBr6]4- inorganic frameworks strengthening halogen···halogen (Br···Br Cl···Cl) interactions between organic amines, resulting smaller distortion weaker (R-3-ClPEA)2PbBr4. Thus, pressure-driven enhancement was responsible for remarkable Conversely, could not be effectively suppressed owing lack interactions, leading absence CPL. Our work gives a insight into intrinsic structure-property relationship noncovalent ultrahigh-color-purity behavior perovskites.

Language: Английский

Citations

0