JOURNAL OF PHYSICS-CONDENSED MATTER
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2022
·Vol. 34
·期 15
·154001
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IF 2.745
Chunli Jiang,Qianqian Luo,Chunhua Luo,Hechun Lin,Hui Peng
We report here the synthesis of hybrid manganese halide crystals, (C4H7N2)MnCl3 · H2O and (C4H7N2)2MnCl4, by using the same organic ligand 2-methylimidazole. Upon heating treatment, the red-emissive (C4H7N2)MnCl3 · H2O crystal is structurally transformed into green-emissive (C4H7N2)2MnCl4 crystal in situ. The crystal structural analysis reveals that the [MnCl5 · H2O]3− octahedra chains decompose into mono [MnCl4]2− tetrahedra, accompanied by the departure of H2O molecules. Upon cooling in air or water vapor, the crystal structure and luminescence of (C4H7N2)2MnCl4 are transformed to those of (C4H7N2)MnCl3 · H2O. The in situ conversion of luminescence between (C4H7N2)MnCl3 · H2O and (C4H7N2)2MnCl4 provides new insight into the potential application of hybrid manganese halides.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Yi-Heng Wang,Yang Liu,Jin Tong,Shu-Yan Yu
The cyclometalated Ir(III) complex, Ir(ppy) 2 (phen-dipzH 2 ) ( Ir-1 ), was synthesized using the ligand 3,8-di(1H-pyrazol-4-yl)-1,10-phenanthroline (phen-dipzH 2 ) and the auxiliary ligand 2-phenylpyridine (ppy). Crystal structure analysis reveals that each {Ir(ppy) 2 } + unit is coordinated by a neutral phen-dipzH 2 ligand in Ir-1 . The packing arrangement of Ir-1 displays aromatic stacking interactions and [C–H…N] hydrogen bonding interactions between the [Ir(ppy) 2 (phen-dipzH 2 )] + cations. In solution, Ir-1 exhibits emission switching induced by acid/base changes, with the emission wavelength shifting from 562 nm (yellow color) in the neutral state to 618 nm (pink color) under acidic conditions and to 528 nm (gray color) under basic conditions. These shifts are attributed to the protonation and deprotonation of the pyrazole units, which is confirmed by 1 H NMR spectra. Additionally, Ir-1 demonstrates high selectivity and sensitivity toward Cu 2+ ions, with a detection limit as low as 9.47 μM compared to other metal ions. The acid/base-responsive phosphorescence of Ir-1 has also been successfully utilized in the development of paper strip-based devices for urea detection.
研究领域:
化学
·
材料科学
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分析化学
✓ 已验证
DOI
高影响因子
Advanced Photonics Research
·
2021
·Vol. 3
·期 2
·2100146
·
IF 0
Shuaichen Si,Lin Huang,Xuejie Zhang,Jing Wang
Laser diodes (LDs) are expected to be the next-generation high luminance sources because of the unobvious “efficiency droop” phenomenon under high power. To achieve high-quality white lighting, red emission is essential for white lighting devices. K 2 SiF 6 :Mn 4+ (KSFM) is a highly suitable red phosphor for its strong broadband excitation in the UV and blue region and intense red emission at 631 nm. In addition, the ultranarrow emission makes it suitable for wide gamut displays. Herein, a stable and easily prepared red color converter, KSFM based phosphor-in-glass films on a coated sapphire substrate (CSA) is developed, which exhibits a high thermal conductivity of 32.02 W m −1 K −1 . Compared with the KSFM phosphor, this KSFM–CSA composite shows an overall increase in thermal quenching and irradiation resistance abilities. A wide color gamut covering 128% of the National Television Standards Committee (NTSC) standard white LD (WLD) is fabricated by coupling a green-emitting CsPbBr 3 embedded glass plate and red-emitting KSFM–CSA with blue LDs. Furthermore, a high-quality WLD with a luminous flux (520 lm), luminous efficiency (93.0 lm W −1 ), and color rendering index (CRI, 81.4) is achieved. With its excellent properties, the KSFM–CSA has great potential in high-power laser lighting and display.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
Nanoscale
·
2021
·Vol. 13
·期 20
·9381-9390
·
IF 7.79
Shuangshuang Shi,Liya Cao,Heng Gao,Zhongzhi Tian,Wengang Bi,Chong Geng,Shu Xu
We report a one-pot route for the synthesis of CsPbBr3 perovskite nanocrystals (PNCs) in styrene to form a glue-like polystyrene (PS) pre-polymer incorporating mono-dispersed PNCs. The pre-polymer enables solvent- and initiator-free fabricating and patterning PNC-PS light down-conversion films for liquid crystal display application. The mechanistic study reveals that the styrene molecules adsorbed on the PNC surface undergo self-initiated polymerization in the pre-polymerization process, forming stable surface capsulation over the PNCs. The PNC-PS pre-polymer and composite film display high photoluminescent quantum yield (PLQY) and resistance to air, light irradiation and water. The micropatterned PNC-PS film with a period of 1000 nm was fabricated through imprinting of the pre-polymer. The micropatterned thin film displays an enlarged viewing angle, improved light distribution and PLQY of >90%. The backlight employing the PNC-PS film displays bright green color and a wide color gamut of >120% NTSC. This solvent-free and one-pot strategy could find promising potential in the development of diverse luminescent nanocomposites to meet the requirements of micro/nano-manufacturing and high performance display application.
研究领域:
材料科学
·
显示技术
✓ 已验证
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Yuanjie Wang,Tengfei Cao,Zhihuang Xu,Liwang Ye,yingui Gao,Xinxin Zhuang
Mn 2+ -based halides show great promise for solid-state lighting and display applications owing to their structural flexibility and excellent luminescence properties. Herein, three hybrid manganese halides (N-AEP)[MnBr 3 (H 2 O) 3 ] 2 ·Br ( 1 ), [(N-AEP) 2 MnBr 6 ]·2Br ( 2 ) and [(N-AEP) 2 MnBr 4 ]·3Br(H 2 O) ( 3 ) with the same organic ligand have been successfully synthesized by adjusting various HBr level or temperature of growth solutions. Systematic characterizations of halides including crystal structure, thermal and photophysical properties were carried out. Their distinct inorganic groups lead to the various luminescence colors: purple-red light in 1 , orange-red light in 2 and green light in 3 . Some interesting physicochemical features, for 1 the temperature-dependent emission properties, 2 the satisfactory thermostability with higher PLQY (13.36%), and 3 the weak ferromagnetic coupling effect, broaden their application prospects. This paper offers sufficient synthetic experiences for Mn 2+ -based halides with different inorganic groups in detail, and provides a reasonable research scheme for their optical properties .
研究领域:
材料科学
·
化学
·
光电
·
固态照明
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）