ACS Applied Nano Materials
·
2022
·
IF 6.14
Qiurui Han,Wenjun Xu,Chunyu Ji,Gaoyang Xiong,Changsheng Shi,Dongming Zhang,Wenquan Shi,Yuxiang Jiang,Zhili Peng
The preparation of multicolor and white light-emitting carbon dots (CDs) is of both significant importance and challenging for their applications as white phosphors for light-emitting diodes (LEDs). In this report, a facile reaction system that is capable of preparing both multicolor and white light-emitting CDs was disclosed. In this system, three CDs emitting yellow, red, and green lights were prepared, and monochromatic LEDs were constructed using these multicolor CDs. Most importantly, single-component white light-emitting CDs with CIE coordinates of (0.33, 0.33) were also prepared. The white light-emitting CDs were applied as single-component white phosphors for the fabrication of white LEDs. The white LEDs constructed demonstrated excellent performance, emitting warm white light (CCT = 3723 K) with CIE coordinates of (0.39, 0.37) and an extremely high color-rendering index of 91.5, which should find favorable applications for indoor illumination.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2019
·
IF 3.021
Su Q. Dong,Pu K. Mi,Sheng Xu,Jun Zhang,Rui D. Zhao
In this paper, a single-component poly-α-olefin (PAO) oil base stock of an α-olefin tetramer was prepared via two-step oligomerization using a metallocene catalyst and a Ziegler–Natta catalyst in sequence. The structure was characterized, the performance was investigated, and the effects of the molecular structure and composition on performance were evaluated. First, the α-olefins were dimerized with different metallocenes as the catalyst, and the effects of the oligomerization conditions (amount of catalyst, temperature, and ratio of Al/Zr) on the molecular weight distribution of the obtained polymers were investigated. The dimerization selectivity reached 83.1%, and the content of branched α-olefin was 91.7%. In the second step, the obtained α-olefin dimer was polymerized by a Ziegler–Natta catalyst, and the dimerization reaction was dominant. A PAO with a tetramer content of 89.6% was obtained, and at 100 °C, the kinematic viscosity was 6.4 cSt and the viscosity index was 148. Further results suggested that both molecular structure parameters (the length of the main chain and the length of the branches) affect the PAO properties when the number of branches and the branch position on the molecular skeleton are the same. It was also found that, as the length of the main chain and the length of the branches increased, the kinematic viscosity and viscosity index increased, while the pour point decreased; however, when the length of the main chain, the number of branches, and the length of the branches were the same, the presence of quaternary carbons in the main chain lowered the viscosity index and increased the pour point.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yinlei Lin,Deqiang Liu,Xinyan Song,Dechao Hu,Zhipeng Yang,Ruming Jiang,Yuanming Yu,Huawen Hu
Single-component wet-curing polyurethane (SPU) coatings offer high curing efficiency; however, their practical application is hampered by suboptimal appearance, mechanical shortcomings, and limited thermal stability. To overcome these limitations, we synthesized novel biooxazolidines—HDI-IHO and MDI-IHO—via the reaction of 2-isopropyl-3-hydroxyethyl-1,3-oxazolidine (IHO) with hexamethylene diisocyanate (HDI) and 4,4′-diphenylmethane diisocyanate (MDI), respectively. When incorporated into the SPU matrix, these biooxazolidines effectively mitigate surface defects, such as bubbles and pinholes, thereby significantly enhancing coating smoothness and overall appearance. Moreover, the introduction of these latent curing agents not only improves the thermal stability of the cured system but also substantially boosts its mechanical properties, as evidenced by increased tensile strength and elongation at break. An optimal biooxazolidine mass fraction of 8% was determined, yielding the best mechanical performance. In addition, the modified SPU exhibits remarkable self-healing capabilities, with visible repair of coating cracks achieved at 60°C.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Lidong Li,Hean Zhang,Lu Han,Ming Qiu,Qianling Cui,Xiaona Qin
The development and fabrication of advanced fluorescence materials is essential for the increasing demand of information encryption with high security. Herein, a smart dynamic single-component system with novel orthogonal and time-dependent encryption properties has been obtained based on solvent-modulated emission. By controlling the aggregation of BODIPY derivatives via changing the solvents, multi-color fluorescence from blue, cyan to green has been achieved. Taking advantage of the solvent-tunable fluorescence, dynamically controlled information encryption strategies have been designed and developed such as fluorescent codes with orthogonal encryption function. Nevertheless, time-dependent encryption system has been developed by enabling the fluorophore in the solid phase which can display multiple codes on a time scale and the correct information can only be read at specified time. This work provides a promising strategy for developing information encryption materials with higher security requirements.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2020
·Vol. 7
·期 22
·4477-4487
·
IF 5.958
Xiang-Ling Lin,Bin Chen,You-Ren Huang,Kai-Yue Song,Pan-Ke Zhou,Lu-Lu Zong,Hao-Hong Li,Zhi-Rong Chen,Rong Jiang
The design of single-component broadband photoemitters with high stability is imperative for the development of next-generation WLEDs. In this work, 1D cationic haloplumbate chains and rigid luminescent naphthalene dicarboxylate (2,6-ndc) with a larger conjugated system were used to construct crystalline single-component broadband photoemitters, i.e. formulated as [(Pb4X2)(ndc)4·A2]n (X = Cl, Br, and I, A = (CH3)3NH+ and (CH3)2NH2+). These hybrids are 3D networks built from flexible 1D cationic (Pb4X2)6+ chains and rigid 2,6-naphthalene dicarboxylic acid ligands. The variation of halogen atoms from Cl to Br/I with higher polarity can switch the holo-directed geometry to the hemi-directed geometry with different distorted degrees. The larger conjugated system of 2,6-ndc leads to strong individual blue adsorptions and emissions. In particular, the Br- and I-analogues with hemi-directed geometries can give rise to additional red emissions, corresponding to the presence of stereochemical activities of Pb centers. Consequently, Br- and I-analogues are white-light emitters containing red emissions stemming from deformable haloplumbate and blue emissions originating from luminescent naphthalene motifs. Interestingly, haloplumbate-based emissions are thermally tunable, and those of naphthalene are generally inactive to thermal stimulus. As a result, tunable emissions from blue/white to yellow can be achieved. The higher quantum yield of Br-analogues can be assigned to their worse haloplumbate connectivity, which can enhance the electron–phonon coupling. In all, the combination of flexible haloplumbate chains with larger π-conjugated fluorophores is an efficient strategy for the construction of tunable broadband photoemitters.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Journal of the American Chemical Society
·
2024
·
IF 14.4
Kuang-Hui Song,Min Peng,Jing-Jing Wang,Li-Zhe Feng,Yi-Chen Yin,Yong-Hui Song,Xue-Chen Ru,Ya-Ping Xie,Guozhen Zhang,Zhengtao Deng,Hong-Bin Yao
Phosphor-converted white-light-emitting diodes (pc-WLEDs) have become increasingly prevalent artificial light sources. Currently, multicomponent phosphors are commonly used for pc-WLEDs, but they often suffer from issues of undesirable reabsorption and unstable emission colors. The potential alternative for pc-WLEDs is a single-component white phosphor that covers the broad visible spectrum with desirable low thermal quenching and efficient luminescence, which is still scarce. To address this challenge, we design a unique single-component white phosphor based on Cu4I4(4-(tert-butyl)-2-(diphenylphosphaneyl)pyridine)2 (Cu4I4(NP-tBu)2) hybrid clusters, which exhibits ultrabroad dual emission from 400 to 800 nm and a high photoluminescence quantum yield of 97% under 320 nm light excitation. Based on time-resolved fluorescence spectroscopy and theoretical model analysis of our Cu4I4 series clusters, we hypothesize that the dual emission comes from the coexistence of two triplet states caused by partial cluster distortion under light excitation. The Cu4I4(NP-tBu)2 cluster’s high structural stability also endows consistent spectral performance and low thermal quenching up to 240 °C. Thus, the fabricated pc-WLED using Cu4I4(NP-tBu)2 white phosphor exhibits a maximum efficiency of 63.4 lm/W and maintains a high color rendering index of ∼88 during 1000 h of continuous operation. Our results highlight a new strategy of low-cost and high-performance copper-iodide cluster-based single-component white phosphors for high-quality pc-WLEDs.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Ming Li,Xinglei Shi,Bo Yang,Jiajun Qin,Xiaobao Han,Wanjia Peng,Yiyan He,Hongli Mao,Deling Kong,Zhongwei Gu
Hydrogel tissue adhesives that currently available are often fabricated by mixing two or more polymeric components. Single-component hydrogels afford injectability, strong and reversible adhesion remain a formidable challenge. This research describes the creation of the first single-component hyaluronic acid hydrogel adhesive-based on phenylboronic acid-diol ester linkages. Phenylboronic acid can not only serve as a cross-linker to form hydrogel, but also act as an adhesion site for glycosyl compounds found in biological cell membranes. The rheological and compressive tests for the hydrogel show that it has excellent self-healing properties, good injectability and strong compressive strength . Adhesion tests demonstrated that the hydrogel has significantly greater adhesion strength than commercial fibrin glue. These findings suggest that the rational design of hydrogel precursors facilitates the formation of single-component networks and multiple functionalities. In vivo studies further proved the hydrogel was an ideal bio-adhesive with biocompatibility, absorbed wound exudate and hemostasis , and accelerated wound closure.
研究领域:
生物材料学
·
医学工程
·
组织修复与再生
✓ 已验证
DOI
PubMed
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2022
·Vol. 41
·期 2
·187-193
·
IF 3.815
Bao Han-Yi,Yang Zhao-Fan,Zhao Yan-Jiao,Gao Xiang,Tong Xin-Zhu,Wang Yi-Nuo,Sun Feng-Bo,Gao Jian-Hong,Li Wei-Wei,Liu Zhi-Tian
The recently emerged double-cable conjugated polymers have come into focus due to their significantly improved power conversion efficiencies (PCEs) in single-component organic solar cells (SCOSCs). In this work, the effect of chlorination in double-cable conjugated polymers with linear benzodithiophene backbone and pendant perylene bisimide on the photovoltaic performance in SCOSCs has been studied. After introducing chlorine atoms into conjugated side chains, the highest occupied molecular orbital level of the conjugated polymers is down-shifted, thus resulting in a higher open-circuit voltage. As a result, the chlorinated double-cable conjugated polymer exhibits improved photovoltaic performance from 3.46% to 3.57%.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Jingsheng Wang,Jun Wang,Shuang Yang,Guoping Ding,Renxin Xu,Wei Liu,Jiuxiao Sun,Kaiwen Chen,Liu Duan,Jiaqi Wang,Hao Wang,Siqi Huo
Single-component epoxy resin (EP) is the premix of EP and latent curing agent, which is highly demanded in industries. However, current single-component EPs struggle to balance storage stability with mechanical properties and flame retardancy. To address this issue, three phosphorus-derived imidazolium salts (MPOx, x = 2, 3, 4) were synthesized using 2-ethyl-4-methylimidazole (EMI) and phosphorus-containing acids with different oxidation states (diphenylphosphinic acid, phenyl hydrogen phenylphosphonate, and diphenyl phosphate). The oxidation state of phosphorus significantly influenced thermal latency of MPOx, with higher oxidation states leading to improved latency. EP/MPO4 achieved the longest shelf life of 42 d at 25 °C. EP/MPO3 and EP/MPO4 exhibited enhanced tensile strength, modulus, and impact resistance compared to EP/EMI, but EP/MPO2 showed poor mechanical properties due to phase separation. All EP/MPOx achieved limiting oxygen index (LOI) exceeding 30 %, with EP/MPO3 showing the highest LOI of 34.0 % and significant reductions in heat release and smoke production. Flame-retardant mechanistic studies revealed a shift from gaseous-phase flame inhibition to condensed-phase promoting carbonization with increasing phosphorus oxidation state. Obviously, MPOx provides a tailored balance of latency, mechanical strength, and flame retardancy, making it a promising solution for advanced single-component EPs in aerospace, electronics, and optical applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Yue Liu,Dong Wang,Haihua Wang,Huan Chen,Qianqian Wang,Wenbing Kang
The inherent acid diffusion during post-exposure baking poses significant challenges in balancing resolution, line-edge roughness, and sensitivity (RLS), thereby constraining the performance of chemically amplified photoresists (CARs) in advanced lithography. This study introduces a novel series of alkene-functionalized imino/imido benzenesulfonate photoacid generators (PAGs), characterized by their solubility, thermal stability, and polymerization attributes. These derivatives can copolymerize with acrylates and methacrylates to form PAG-bound copolymers, integrating non-ionic PAG units and acid-cleavable bulky alicyclic substituents, facilitating their use as “single-component” resists devoid of additives. Upon exposure to electron beams or ultraviolet radiation, the sulfonamide esters undergo N─O bond scission, producing photoacids that catalyze the deprotection of acidolytic groups. Compared to PAG-blended systems, these PAG-bound systems curtail acid diffusion by generating long-chain sulfonic acids, while preserving high sensitivity. The formulated single-component CARs demonstrate superior resolution and roughness, achieving a minimum linewidth of 42 nm at an electron beam dose of 73 µC cm − 2 . This research provides a rational design for polymerizable imino/imido benzenesulfonate PAGs and single-component CARs, offering a viable solution to the RLS problem.
研究领域:
材料科学
·
光刻技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
·
2025
·
IF 3.9
Xu Han,Le Chang,Zeqian Wang,Feng Liu
One-component polysulfide adhesive preparation by diisocyanate-terminated prepolymers and 1,4-butanedithiol (BSO) can provide convenient moisture curing and excellent mechanical properties, but the formation of polysulfide-urea (–NHCOS–) groups causes some reduction in solvent resistance limiting their further application in aircraft fuel tank sealing. Introducing silane side chains into polysulfide adhesive systems is a viable approach to improving the solvent resistance. In this work, a series of novel silane side chain-modified one-component polysulfide adhesives were synthesized by using chain extenders in different proportions of BSO and (3-(2-aminoethyl)aminopropyl)trimethoxysilane (AEAPTMS). The results showed that a moderate amount of silane side chains and restricting the formation of Si–O–Si crosslinked networks can effectively enhance the elongation, interfacial interaction and solvent resistance. The optimal overall performance was obtained when the mass ratio of BSO and AEAPTMS was 7 : 1 (Si-OCPS3). Conversely, the oil and water absorption content after 21 days of Si-OCPS3 were 2.21 ± 0.06% and 2.81 ± 0.31%, being 20.50% and 43.57% lower than before modification (Si-OCPS0), respectively. Moreover, Si-OCPS3 exhibited higher tensile strength of 17.34 ± 0.66 MPa (oil) and 15.67 ± 0.32 MPa (water) than Si-OCPS0. We believe our paradigm can provide a feasible approach for designing high-performance one-component polysulfide adhesives.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Liubing Fan,Kunjie Liu,Qindan Zeng,Mingyang Li,Hao Cai,Jun Zhou,Shihui He,Jing Zhao,Quanlin Liu
Organic–inorganic hybrid metal halides have attracted widespread attention as emerging optoelectronic materials, especially in solid-state lighting, where they can be used as single-component white-light phosphors for white light-emitting diodes. Herein, we have successfully synthesized a zero-dimensional (0D) organic–inorganic hybrid mixed-metal halide (Bmpip)2PbxSn1–xBr4 (0 < x < 1, Bmpip+ = 1-butyl-1-methyl-piperidinium, C10H22N+) that crystallizes in a monoclinic system in the C2/c space group. Pb2+ and Sn2+ form a four-coordinate seesaw structure separated by organic cations forming a 0D structure. For different excitation wavelengths, (Bmpip)2PbxSn1–xBr4 (0 < x < 1) exhibits double-peaked emission at 470 and 670 nm. The emission color of (Bmpip)2PbxSn1–xBr4 can be easily tuned from orange-red to blue by adjusting the Pb/Sn molar ratio or excitation wavelength. Representatively, (Bmpip)2Pb0.16Sn0.84Br4 exhibits approximately white-light emission with high photoluminescence quantum yield up to 39%. Interestingly, the color of (Bmpip)2PbxSn1–xBr4 can also be easily tuned by temperature, promising its potential for application in temperature measurement and indication. Phosphor-converted light-emitting diodes are fabricated by combining (Bmpip)2PbxSn1–xBr4 and 365 nm near-UV LED chips and exhibit high-quality light output.
研究领域:
材料科学
·
光学
·
电子工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）