CRYSTENGCOMM
·
2023
·Vol. 25
·期 40
·5722-5729
·
IF 3.1
Abraham Mensah,Wei-Min Chen,Ennin Vendish Kweku,Peng-Lai Liu,Juan-Juan Shao,Fang-Ming Wang,Li-Zhuang Chen
Five novel ‘all-in-one’ (AIO) structured cuprous iodide coordination materials 1–5 are presented. With the introduction of planar aromatic groups on the ligand, 1,4-diazabicyclo[2.2.2]octane (DABCO), targeted at eliminating stronger π–π interactions through the twisted nature of the latter species, the complexes displayed good stability, solubility, and high quantum yields of emissions ranging from 70.3–95.3%. Further systematic studies were performed on the relationship between their luminescence and modification of the ligands with halogen atoms. This work provides a reasonable idea for designing luminescent cuprous iodide materials with high quantum yields of emission for use in solid-state lighting in the future.
研究领域:
无机化学
·
材料科学
·
光物理
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Pinyi He,Jianliang Bai,Guohui Yang,Fu Qin,Xinyu Wang,Xu Yu,Yongkang Yao,Xin Tang,Lili Ren
Phenylenediamine has become a classic material for synthesizing carbon dots (CDs) due to its nitrogen doping, conjugated aromatic structure, low cost, and easy availability. Typically, the CDs obtained from m-phenylenediamine (mPD), o-phenylenediamine (oPD) and p-phenylenediamine (pPD) exhibit fluorescence that follows a rule from blue to red. However, their photoluminescence quantum yield (PLQY) is low, and the spectral coverage is relatively small, which greatly limits their application and development in high-quality white LEDs. Herein, we selected a simple and environmentally friendly succinic acid (SA) to regulate the luminescence properties, which achieve unconventional luminescent behaviors with high PLQY values (68 %, 60 %, and 72 %) and wide spectral coverage. The PL emission of the obtained CDs followed the rule of pPD, mPD, and oPD from deep-blue to red, which is different from most previously reported results. Additionally, The SA molecules altered the polymerization structure and led to changes in the conjugated domain and surface C=O and –COOH groups, achieving this unconventional luminescence with high PLQY values. Finally, high-quality white LEDs were fabricated with the CIE coordinates of (0.34, 0.33), close to the (0.33, 0.33) of pure white light. R-CDs with an absolute PLQY value of up to 72 % were also used in bioimaging. We use the same small organic acid to regulate the phenylenediamine isomer and obtain CDs with fluorescence in different shift directions. This work will provide a new idea for luminescence regulation with high PLQY values and wide spectral coverage.
研究领域:
材料科学
·
光学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2019
·
IF 4.018
Shu Wang,Shun-Hua Wu,Wen-Le Fang,Xiao-Feng Guo,Hong Wang
A facile and straightforward strategy was used to prepare carbon dots (CDs) using catechol as carbon source in one-pot hydrothermal method . The synthesis method is simple without any doping and modification and the prepared CDs do not require any post-processing. Characterizations of the obtained CDs indicated that they had high crystallinity and higher quantum yield (QY, 32%) than most non-functionalized and non-doped CDs. Noticeably, the fluorescence of CDs could be quenched with hypochlorite (ClO − ) by oxidation of the residual pyrocatechol groups on the surface to o -benzoquinone exhibiting high sensitivity and selectivity for ClO − . The assay covered a linear range from 0.1 to 10 μM with a low detection limit of 30 nM. The results showed that the CDs provided a promising potential tool for the detection of ClO − in real water samples.
研究领域:
材料科学
·
环境科学
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2013
·
IF 2.144
Beibei Wang,Huan Shang,Cuiping Nie,Qi Wang,Meihu Ma,Zhaoxia Cai
A novel two-step controlled basic water phase method has been developed for synthesizing size-tunable and water-soluble CdTe/Cd(OH) 2 core/shell quantum dots with high quantum yield and good stability. The size of the prepared CdTe/Cd(OH) 2 core/shell quantum dots can be easily manipulated by varying the concentrations of NaOH solution step by step. The maximal emission wavelengths of the series CdTe/Cd(OH) 2 core/shell QDs were from 513 nm to 610 nm (emission colors tuned from green to red). The CdTe/Cd(OH) 2 core/shell quantum dots not only possess high quantum yield (up to 83%) but also exhibit excellent photostability (being stable after being stored for more than 2 months). The CdTe/Cd(OH) 2 core/shell quantum dots were characterized by transmission electron microscopy , high-resolution transmission electron microscopy, X-ray powder diffraction spectrometry , ultraviolet–visible spectrometry and fluorescence spectrometry. The water-soluble nature of the CdTe/Cd(OH) 2 core/shell quantum dots offers great potentiality for their chemical and biological applications. This method is easily controlled, low-cost and reproducible. So it is possible to extend this approach to the preparation of other size-tunable inorganic metal hydroxide capped core/shell quantum dots.
研究领域:
材料科学
·
纳米技术
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
LUMINESCENCE
·
2014
·Vol. 29
·期 7
·818-823
·
IF 1.675
Meiting Dong,Jingyi Xu,Shuxian Liu,Ying Zhou,Chaobiao Huang
Here we report a facile one-pot method for the preparation of high-quality CdSe nanocrystals (NCs) in aqueous solution under an air atmosphere. Compared with the traditional use of NaHSe or H 2 Se, the more stable sodium selenite is utilized as the Se source for preparing highly luminescent CdSe nanocrystals. By using mercaptosuccinic acid (MSA) as the capping agent and borate–citrate acid as the buffering solution, CdSe nanocrystals with high quantum yield (up to 70%) have been synthesized conveniently. The influence of different experimental parameters, such as the pH of the precursor solution, the molar ratio of Cd 2+ to Na 2 SeO 3 and Cd 2+ to MSA on the CdSe nanocrystals, has been systematically investigated. The prepared CdSe NCs were spherical with a size of ~ 5 nm. Copyright © 2014 John Wiley & Sons, Ltd.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Yaochun Qiang,Yanan Liu,Jiayuan Chen,Shaopeng Liu,Lulu Zhang,Haojian Kang,Feiyan Xu,Zongliang Xiao,Weixiong You,Lei Han,Xinyu Ye
It is well known that green-emitting phosphor plays a key role in a phosphor-converted white LED with high color rendering index. Here, a novel green phosphor BaY 1·95 Al 2 Ga 2 SiO 12 :0.05Ce 3+ with high quantum yield , low thermal quenching and excellent water resistance is reported. The green phosphor can be easily prepared by the conventional solid-state reaction method at 1325 °C for 4 h in a reducing atmosphere. The compound is cubic and crystallizes in space group I a 3 ‾ d with refined lattice parameters of a = 12.1451(3) Å. The phosphor can be effectively excited by the mainstream commercial blue LEDs (445–465 nm), its emission peak is observed at 517 nm and the absolute quantum yield under 450 nm excitation is as high as 96.2% at 25 °C. The green phosphor exhibits good resistance toward thermal quenching, with the luminescence intensity at 150 °C only decreasing by 11% of the value at 25 °C. In addition, the green phosphor has a very good water resistance, and its luminescence intensity remains almost unchanged when it is soaked in water for more than 300 h. The white LED fabricated by employing the green phosphor shows excellent optical properties with Ra = 92.4, CCT = 3304 K and CIE 1931 chromaticity coordinates as (x = 0.4178, y = 0.3985). All experimental results indicate that BaY 1·95 Al 2 Ga 2 SiO 12 :0.05Ce 3+ is an outstanding green phosphor which has great potential to be used for the phosphor-converted white LEDs with excellent color rendering.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2020
·
IF 4.189
Rongqian Yao,Lei Zhong,Yuchen Han,Chao Jin,Jiamin Lu,Fen Chen,Liang Liao,Zeng Chen,Yinggan Zhang,Guolong Chen,Yuejin Zhong,Yinong Zheng,Wenyan Huang,Siqi Lan,Zude Feng,Xulin Chen,Canzhong Lu
Integration of high quantum yield blue emission and easy film-forming ability in organic emissive materials is challenging. Polycarbosilane (PCS) has received much attention as a model compound owing to its high stability, versatile optical properties, solvability, and film-forming ability; also, anthracene as a star material is the first organic molecule for electroluminescence (EL) devices. Herein, an ingenious strategy was successfully introduced to prepare PCSx with 9-ethylanthracene (referred as 9-EA-PCSx) by a hydrosilylation reaction using 9-vinylanthracene and PCS as starting materials, which transfer efficient energy from −Si–C– bonds to anthracene units. Grafted 9-ethylanthracene with extended π-conjugation effectively improves optical property, morphological stability, and oxidation and ultraviolet (UV) radiation resistance of PCS. Particularly, 9-EA-PCSh powder displays excellent blue light emission (λmax = 433 nm) with a high quantum yield (up to 80.06%), which is the highest value ever reported for organosilicon polymers to the best of our knowledge. For the first time, such a synergistic effect of PCS with anthracene in this way paves a practical way toward reliable emissive materials capable of forming facile coatings and providing useful low-cost emitting layers in developing foldable organic devices.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 5
·2221-2229
·
IF 3.3
Xin-Jian Jin,Long Tan,Zhi-Qing Zhao,Meng-Chao Li,Qun-Yi Zhou,Jing-Jian Zhang,Tong-Bao Lv,Qiang Deng,Jun Wang,Zheling Zeng,Shuguang Deng,Gui-Ping Dai
Graphene quantum dots (GQDs) are promising for bioimaging applications due to their unique optical properties and good biocompatibility. However, the facile synthesis of GQDs with long-wavelength emission and high quantum yield (QY) under long-wavelength excitation is still a challenge. Herein, dual-emissive GQDs were synthesized via a facile one-pot solvothermal method using 2,7-dihydroxynaphthalene (2,7-DHN) and piperazine anhydrous (PA) as the raw materials. The obtained GQDs exhibited a green-emission band (core state emission) and a red-emission band (surface state emission), which originated from the inner π-conjugated structure and various surface functional groups, respectively. The π-conjugated structure mainly comes from the aromatic rings in 2,7-DHN, and the N–H of PA acts as the main nitrogen source, which is beneficial for the QY. The obtained GQDs showed obvious concentration-dependent optical properties. Importantly, they are able to generate red emission with a high absolute QY of 54.9% in ethanol and 24.9% in water, among the best values of reported GQDs. In addition, the prepared GQDs have good water-solubility, low cytotoxicity, and superior stability against photobleaching. Based on the above advantages, the as-prepared GQDs were successfully applied for labeling HeLa cells in vitro. Therefore, our prepared GQDs demonstrated that they can be an efficient biomarker for fluorescent bioimaging.
研究领域:
材料科学
·
生物医学工程
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Na Lin,Xin Wang,Hong-Yan Zhang,Kai-Qi Sun,Li Xiao,Xin-Yue Zhang,Cheng-Yang Yue,Li Han,Zhi-Wei Chen,Xiao-Wu Lei
Commercially available rare-earth-doped inorganic oxide materials have been widely applied as X-ray scintillators, but the fragile characteristics, high detection limit, and harsh preparation condition seriously restrict their wide applications. Furthermore, it remains a huge challenge to realize X-ray flexible imaging technology for real-time monitoring of the curving interface of complex devices. To address these issues, we herein report two isostructural cuprous halides of zero-dimensional (0D) [AEPipz]CuX3·X·H2O (AEPipz = N-aminoethylpiperazine, X = Br and I) with controllable size to nanosize crystal as highly efficient scintillators toward flexible X-ray imaging. These cuprous halides exhibit highly efficient cyan photoluminescence and radioluminescence emissions with the highest quantum yield of 92.1% and light yield of 62,400 photons MeV–1, respectively, surpassing most of the commercially available inorganic scintillators. Meanwhile, the ultralow detection limit of 95.7 nGyair s–1 was far below the X-ray dose required for diagnosis (5.5 μGyair s–1). More significantly, the flexible film is facilely assembled with excellent foldability and high crack resistance, which further acts as a scintillation screen achieving a high spatial resolution of 17.4 lp mm–1 in X-ray imaging, demonstrating the potential application in wearable radiation radiography. The combined advantages of high light yield, low detection limit, and excellent flexibility promote these 0D cuprous halides as the most promising X-ray scintillators.
研究领域:
材料科学
·
放射学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale Research Letters
·
2019
·Vol. 14
·期 1
·1-9
·
IF 3.159
Liu Hanxin,Sun Chun,Gao Zhiyuan,Geng Chong,Shi Shuangshuang,Wang Le,Su Sijing,Bi Wengang
Perovskite quantum dots (QDs) have been widely used in white light-emitting diodes (WLEDs), due to their high quantum yield (QY), tunable bandgap, and simple preparation. However, the red-emitting perovskite QDs are usually containing iodine (I), which is not stable under continuous light irradiation. Herein, perovskite-based WLED is fabricated by lead-free bismuth (Bi)-doped inorganic perovskites Cs 2 SnCl 6 and less-lead Mn-doped CsPbCl 3 QDs, which emits white light with color coordinates of (0.334, 0.297). The Bi-doped Cs 2 SnCl 6 and Mn-doped CsPbCl 3 QDs both show excellent stability when kept in the ambient air. As benefits from this desired characteristic, the as-prepared WLED shows excellent stability along with operating time. These results can promote the application of inorganic perovskite QDs in the field of WLEDs.
研究领域:
材料科学
·
光电
·
光子学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Jinping Song,Xiaomin Liang,Qi Ma,Jinhui An,Feng Feng
In this work, we firstly developed a new rapid detection method of nimesulide (Nim) based on the boron and nitrogen co-doped carbon dots (B,N-CDs) as the fluorescence probe. The B,N-CDs were prepared by a facile hydrothermal treatment using ammonium citrate and bis(pinacolato)diboron as precursors. The as-prepared B,N-CDs were mono-dispersed with an average diameter of 3.3 nm, and exhibited good stability and strong fluorescence emission with a high quantum yield of 68.89%. The fluorescence of B,N-CDs was obviously quenched with the addition of Nim. A good linear relationship between ln (F 0 /F) and the concentration of Nim was obtained in the range of 0–100 μM, and the limit of detection was 125 nM. Furthermore, the proposed analysis method was successfully applied for the detection of Nim in pharmaceutical samples and recoveries ranged from 94.60%–96.73%. More remarkably, it was further found that the as-prepared B,N-CDs displayed bright blue solid-state fluorescence, exhibiting potential application in invisible fluorescent ink for anti-counterfeiting and fluorescent dye .
研究领域:
分析化学
·
材料科学
·
药物分析
·
纳米技术
·
光学材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-14
·
IF 14.7
Peng Chuan,Zhu Yuling,Zhang Kaibo,Wang Yiwei,Zheng Yi,Liu Yang,Fu Weili,Tan Hong,Fu Qiang,Ding Mingming
Nonaromatic and nonconjugated fluorescent materials have garnered increasing attention in recent years. However, most non-classical chromophores are derived from electro-rich nitrogen and oxygen atoms, which suffer from short emission wavelengths, low efficiency, limited responsiveness, and obscure luminescence mechanisms. Here we present an emission mechanism in bioactive polycysteine, an aliphatic polymer that displays polymerization- and aggregation-induced emission, high quantum yield, and multicolor emission properties. We show that the hydrogen atoms bonded to the sulfur atoms play a crucial role in luminescence. This enables reversible modulation of polymer fluorescence under reducing and oxidizing conditions, facilitating specific imaging and quantitative detection of redox species in cells and in vivo. Furthermore, the polymer exhibits better anti-inflammatory and antioxidative activities compared to first-line clinical antioxidants, offering a promising platform for in vivo theragnosis of diseases such as osteoarthritis.
研究领域:
材料科学
·
生物医学工程
·
化学
·
生物学
·
药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）