ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Guojun Zhou,Sidan Wang,Nan Zhang,Yilin Mao,Jun Zhou,Zhiguo Xia,Xian-Ming Zhang
Despite increasing research interests in chiral hybrid metal halides for photonic applications, the chiral-identified multicolor-tunable photoluminescence (PL) remains a fundamental challenge for multilevel anti-counterfeiting. Herein, 0D antimony(III) enantiomers, ( R / S -C 5 H 14 N 2 ) 2 SbCl 5 ·2Cl, are designed and synthesized via chiral induction using R / S -3-aminopiperidine dihydrochloride as structural templates. Hydrogen bonding networks between C 5 H 14 N 2 + and [SbCl 5 ] 2− contribute to the chiral helical structures with distinct asymmetry factors, facilitating efficient chiral transfer across organic–inorganic interfaces. Incredibly, R - and S -enantiomers exhibit an unprecedented excitation-dependent PL behavior with chiral differentiation, leading to multicolor-tunable emissions across the visible-light spectrum, from blue to white to yellow. This originates from the competitive transitions between the triplet-state ( 3 P n →S 0 ) self-trapped excitons (STEs) of [SbCl 5 ] 2− and the singlet-state (S 1 →S 0 ) fluorescence of R / S -C 5 H 14 N 2 + . Beyond that, chiral organic ligands break the inorganic symmetry, facilitating spin–orbit coupling and excited-state splitting of R - and S -enantiomers, which governs the electron absorption transitions to achieve the chiral-identified multicolor-tunable PL. These materials are further employed in multilevel anti-counterfeiting by fabricating these precise images into periodic pixel arrays. This work establishes a paradigm for designing eco-friendly chiral emitters with superior PL tunability, as well as provides fundamental insight into multi-channel radiative transition mechanisms.
研究领域:
材料科学
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光物理
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手性光电子学
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防伪技术
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无机化学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
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2025
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IF 4.7
Zhili Xu,Shuanglai Liu,Wenwu You,Mingxing Li,Jiacai Li,Pingping Fan,Xu Zhao,Gencai Pan,Huiping Gao,Yanli Mao
Organic–inorganic hybrid metal halides have attracted considerable attention due to their facile synthesis, low cost, and high thermal and chemical stability. However, developing environmentally benign, readily synthesized, high-performance, and spectrally tunable broadband-emitting materials remains challenging. Herein, this study reports a zero-dimensional perovskite material, TEA2HfCl6:Sb3+, using a room-temperature coprecipitation method. This material exhibits low toxicity and excitation-wavelength-dependent modulation of singlet and triplet emission ratios, enabling broadband emission ranging from warm white to deep red. Notably, TEA2HfCl6:11%Sb3+ achieves a high photoluminescence quantum yield of up to 93.1%. Steady-state and time-resolved spectroscopic analyses reveal that these emissions arise from Sb3+-induced radiative transitions of singlet and triplet self-trapped excitons. Furthermore, leveraging its scalable synthesis process and favorable emission characteristics, the material shows potential for applications in large-area optical anticounterfeiting paper and full-spectrum, eye-friendly white-light-emitting diode (WLED). These findings highlight the dual functionality of TEA2HfCl6:Sb3+ in secure optical encryption and solid-state lighting, providing a promising platform for the development of multifunctional luminescent materials.
研究领域:
材料科学
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光电子学
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发光材料
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固态照明
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安全与加密
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无机化学
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纳米材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Wenjing Wang,Jing Wu,Yuxin Xing,Zonghua Wang
Herein, a kind of red emissive carbon dots (BNCDs) based on 1,1′-binaphthyl-2,2′-diamine (BNDM) and citric acid as carbon source were prepared through one-pot solvothermal method . The synthesized BNCDs have uniform size distribution, photobleaching resistance, and excitation wavelength-independent emission performance with the optimal fluorescence at λ ex /λ em = 540/603 nm. The composite films of BNCDs in polyvinyl alcohol (PVA) matrix exhibited bright red emission under ultraviolet irradiation , indicating their potential in solid-state luminescence. Also, BNCDs shows unique solvent-dependent phenomenon, the optical behavior can be tuned by the change of solvent polarity. Another striking observation was that BNCDs can be applied as a fluorescence sensor for highly sensitive quantitative detection of trace water in organic solvents because it’s polarity-sensitive property. Through fluorescence “on–off–on” mechanism, BNCDs could be used as a fluorescence sensor for detection of Fe 3+ and F - with LOD of 0.219 and 0.0104 μmol L −1 , respectively. This strategy offers an efficient approach for preparing red emissive carbon dots and lays a foundation for its multi-functional application.
研究领域:
材料科学
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纳米技术
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分析化学
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光学传感
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2018
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IF 6.735
Xiao-Fei Wang,Gui-Gen Wang,Jia-Bing Li,Zheng Liu,You-Xiao Chen,Long-Fei Liu,Jie-Cai Han
Herein we first report new chlorine-doped graphene quantum dots (Cl-GQDs) that can be used in solid-state white-light-emitting diodes (WLEDs). The Cl-GQDs with a mean size of 1.53 nm are obtained by one-step hydrothermal method using β-cyclodextrin and hydrochloric acid as the source materials. The PL emission spectra of the Cl-GQDs show an excitation-wavelength-dependent behavior in the range from 300 to 380 nm excitation. Under UV irradiation, the Cl-GQDs can direct emit white light. Given that they are worth using in light-conversion, Cl-GQDs embedded solid composite film (Cl-ESCF), based on silicon resin as host material, is successfully fabricated by solution-processing approach. The freestanding Cl-ESCF has high transparency and flexibility, excellent photostability and temperature resistance, and retains its optical properties in the solid state. In order to realize its potential, the Cl-ESCF converted remote UV-pumped WLED is demonstrated. The results verify that the Cl-GQDs can be homogeneously dispersed within solid matrix without obvious aggregation so that a uniform and defect-free natural white light can be obtained. In addition, our WLED possesses favorable white-light characters with the CIE of (0.33, 0.34), moderate CCT of 5653 K, and high CRI of 87.6, as well as good color and LED stability. This single-phase rare-earth-free white-luminescent Cl-GQDs may be not only expected to prevent the drawbacks of multicolor phosphors, thereby generating high-quality white emission, but also identified to be a green alternative for conventional emitters.
研究领域:
材料科学
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纳米技术
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光电
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光子学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）