JOURNAL OF COORDINATION CHEMISTRY
·
2017
·
IF 1.795
Bu-Lin Chen,Li Liu,Xin-Xin Zhong,Abdullah M. Asiri,Khalid A. Alamry,Guang-Hua Li,Fa-Bao Li,Nian-Yong Zhu,Wai-Yeung Wong,Hai-Mei Qin
Copper(I) halide complexes having thermally activated delayed fluorescence (TADF) and phosphorescence have attracted much attention. Here, a series of four-coordinate dinuclear copper(I) halide complexes, [CuX(bpbp)]2 (bpbp = 2,2′-bis(diphenylphosphino)biphenyl, X = I (1), Br (2) and Cl (3)), were synthesized, and their molecular structures and photophysical properties were investigated. The structural analysis reveals that two copper(I) centers are bridged by two halogen ligands to form a dinuclear structure with a four-membered Cu2X2 ring. These complexes exhibit yellow to blue emission in the solid state at room temperature and have peak emission wavelengths at 575–487 nm with microsecond lifetimes (τ = 6.2–19.8 μs) and low emission quantum yields (<0.01%). The emissions of 1–3 originate from MLCT, XLCT, and IL (intraligand) transitions. Three complexes displayed good thermal stability.
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Jiale Liu,Zhennan Wu,Ye Tian,Yanchun Li,Lin Ai,Tingting Li,Haoyang Zou,Yi Liu,Xindong Zhang,Hao Zhang,Bai Yang
Aggregation-induced emission (AIE) and self-assembly induced emission (SAIE) effects have been employed to tune the emission properties of metal nanoclusters (NCs). However, it is still not possible to further enhance the photoluminescence quantum yields (PLQYs) and control the emission colors of the NCs using AIE and SAIE. On the basis of our recent work studying the contribution of Cu(I) defects in the SAIE of Cu NCs, in this article, Au(I) was doped into Cu NC self-assembled nanosheets (NSASs) to construct a more stable Au(I)-centered state. As a result, the PLQYs, emission stability, and tunability of emission colors of the Cu NSASs were significantly improved. Detailed studies reveal that the doped Au(I) induces a Au(I)–Cu(I) metallophilic interaction, which leads to a ligand-to-Cu–Au charge transfer, which facilitates the relaxation of excited electrons via a radiative pathway, thereby enhancing the emission intensity. The charge transfer from Cu to Au lowers the energy, thus leading to the red-shift of PL emission. Au(I) is likely doped into the Cu NSASs rather than in individual NCs, because 0.3% Au doping is enough to alter the emission properties. By mixing Au(I)-doped Cu NSASs with different emission colors (due to different Au doping percentages) as color conversion materials on commercially available 365 nm GaN chips, a white light-emitting diode prototype is fabricated.
研究领域:
材料科学
·
纳米技术
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2023
·Vol. 26
·期 3
·2472-2477
·
IF 3.3
Yingui Gao,Zhihuang Xu,Liwang Ye,Yuanjie Wang,Xinxin Zhuang
Lead-free metal halides are considered as alternatives to lead-based perovskites due to their low toxicity, rich structural diversity, and high luminescence properties. We report millimeter-sized single crystals of a new zero-dimensional (0D) copper(I)-based hybrid material, (AEP)2Cu2Br6·2Br·2H2O (AEP = C6H18N33+), which exhibits bright broadband green photoluminescence (PL) at 510 nm with a Stokes shift of 220 nm and a PL lifetime of 121.1 μs. Density functional theory (DFT) calculations and experimental studies reveal that the green light can be attributed to self-trapping exciton (STE) emission. It is worth mentioning that this crystal has a high photoluminescence quantum yield (PLQY) of 90.5%, which is higher than most copper halides.
研究领域:
材料科学
·
光电学
·
光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Pengyu Zhang,Chen Li,Haoyang Guan,Yihao Wang,Chao Wang,Yiping Du,Kun Zheng,Jiawen Xiao,Zhengguang Yan
Hybrid copper(I)–based halides are important materials in radiation detection and anticounterfeiting owing to their excellent luminescence efficiency and low toxicity. This study employed a chiral racemic strategy to synthesize ( Rac -MPZ) 2 Cu 2 I 6 (where MPZ represents 2-methylpiperazine) single crystals with excitation-dependent dual-color emission. ( Rac -MPZ) 2 Cu 2 I 6 has a zero-dimensional crystal structure, which is different from the two-dimensional structure of chiral ( R / S -MPZ) 2 Cu 2 I 6 . Interestingly, ( Rac -MPZ) 2 Cu 2 I 6 exhibits excitation-dependent cyan and red emissions at room temperature (298 K), with the photoluminescence quantum yield of the cyan emission peak approaching 90 %. Its luminescence mechanism is proposed through density functional theory calculations and theoretical experiments. ( Rac -MPZ) 2 Cu 2 I 6 exhibits excellent X-ray absorption and responsivity, with a light yield of up to 34,500 photons/MeV. X-ray imaging screens developed with ( Rac -MPZ) 2 Cu 2 I 6 show an excellent resolution of >10 lp/mm. Therefore, the synthesized material has great potential for practical applications as a scintillator. In addition, its unique excitation-dependent dual-color emission property at room temperature and temperature-dependent thermochromicity have excellent potential in anticounterfeiting and information encryption, which can realize multimode and multilevel anticounterfeiting or encryption effects. This study also provides new prospects for developing multifield applications of copper(I)-based halides.
研究领域:
材料科学
·
光学
·
辐射检测
·
防伪技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-11
·
IF 4.259
Zhi Zijian,Chen Jianle,Li Shan,Wang Wenjun,Huang Rui,Liu Donghong,Ding Tian,Linhardt Robert John,Chen Shiguo,Ye Xingqian
Pectin, a natural polysaccharide found in the cell wall of most higher plant such as citrus, has drawn much attention due to its potential beneficial role in facilitating the treatment of many diseases like cancer, hyper cholesterol and diabetes. However, the broad application of pectin faces great limitations as the large molecular size of pectin severely prevents its bioavailability in vivo . In this study, we report an effective and highly convenient approach to degrade natural pectin into lower molecular pectin. By combining ultrasound with Fenton system (US-Fenton), we show that ultrasound synergistically enhances the efficiency of Fenton reaction to degrade pectin into 5.5 kDa within only 35 minutes. Importantly, RG-I domain, the most effective portion of natural pectin, was well preserved and highly enriched. In addition, the antioxidant activities of US-Fenton-treated pectin was significantly elevated. The mechanism of this novel observation was further investigated through the multiple structural analyses including HPLC, IR and NMR. Taken together, we present a novel and convenient approach to generate ultra-low molecular weight pectin with high efficiency and higher bioactivity. We expect our approach will have broader applications in improving the bioavailability and bioactivity of other polysaccharide-based natural compounds.
研究领域:
食品科学
·
生物化学
·
植物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Qianru Zhang,Anqi Liu,Xin Song,Shihao Xu,Liangguo Da,Dan Lin,Changlong Jiang
Organophosphate pesticides (OPs) are widely utilized in agricultural production, and the residues threaten public health and environmental safety due to their toxicity. Herein, a novel and simple DNA aptamer-based sensor has been fabricated for the rapid, visual, and quantitative detection of profenofos and isocarbophos. The proposed DNA aptamers with a G-quadruplex spatial structure could be recognized by SYBR Green I (SG-I), resulting in strong green fluorescence emitted by SG-I. The DNA aptamers exhibit a higher specific binding ability to target OP molecules through aromatic ring stacking, disrupting the interaction between SG-I and DNA aptamers to induce green fluorescence quenching. Meanwhile, the fluorescence wavelength of G-quadruplex fluorescence emission peaks changes, accompanied by an obvious fluorescence variation from green to blue. SG-I-modified aptasensor without any additive reference fluorescence units for use in multicolor fluorescence assay for selective monitoring of OPs was first developed. The developed aptasensor provides a favorable linear range from 0 to 200 nM, with a low detection limit of 2.48 and 3.01 nM for profenofos and isocarbophos, respectively. Moreover, it offers high selectivity and stability in real sample detection with high recoveries. Then, a self-designed portable smartphone sensing platform was successfully used for quantitative result outputs, demonstrating experience in designing a neotype sensing strategy for point-of-care pesticide monitoring.
研究领域:
分析化学
·
环境科学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2019
·
IF 6.35
Shanshan Wang,Chuanping Li,Muhammad Saqib,Guohua Qi,Chunhua Ge,Haijuan Li,Yongdong Jin
Signal amplification for electrochemiluminescence (ECL) plays a significant role in ultrasensitive detection of disease biomarkers. We report herein a new signal amplification strategy–quasi-photonic crystal nanomembrane-based light scattering enhancement for ECL signal amplification, via fabricating a novel close-packed monolayered SiO2-nanomembrane as solid-state ECL electrodes. In the system, the quasi-photonic crystal structure of the monolayered SiO2-nanomembrane led to intense light scattering within the nanofilm, which significantly increases the photon flux and then definitely improves the excitation number of the luminescent molecules (Ru(bpy)32+). Reinforced by the nanostructured electrode surface of the nanomembrane, the as-prepared ECL electrode exhibited significant ECL enhancement, ∼77-fold enhancement in the classic Ru(bpy)32+-TPrA system. We further constructed a sandwich-type SiO2-nanomembrane based solid-state ECL immunobiosensor for ultrasensitive detection of cardiac troponin I (cTnI). Under optimal conditions, the immunobiosensor exhibited a very low limit of detection (LOD) of 5.6 fg mL–1 for cTnI. Due to the cheap and easy availability of the materials, this study and findings not only provide an efficient way to improve the ECL intensity but also benefit the design of novel ECL electrodes for various biomarker detections.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yichen Ding,Dongya Li,Shiyu Zuo,Zeyu Guan,Su Ding
The synergistic effect of radicals and non-radical pathways has attracted much attention for pollutant removal in complex water environments. A novel B-doped CuO/Cu 2 O composite material (B-Cu x O) was synthesized to activate PMS for the degradation of bisphenol A (BPA). XPS and FT-IR proved that B was doped into the Cu x O, which changed the proportion of Cu(Ⅱ) and Cu(Ⅰ). As a result, the cycle of Cu(Ⅱ)/Cu(Ⅰ) was promoted and the kinetic degradation rate of BPA increased by 12 times. The radicals quenching experiments and EPR verified the effects of radicals (·OH and SO 4 ·- ) and non-radical ( 1 O 2 ) pathways in the pollution degradation processes. The results show that B doping accelerated the Cu(Ⅱ)/Cu(Ⅰ) cycle, and at the same time realized the synergistic effect of radicals and non-radical. The PMS/B-Cu x O system exhibited consistent performance in a wide pH range of 5–11. The toxicity evaluation of the transformation products among BPA solutions was studied. This study provided a novel method for accelerating the catalysis of radicals and non-radical synergy.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ORGANOMETALLICS
·
2012
·
IF 3.963
Mei-Jin Li,Xing Liu,Mei-Juan Nie,Zhao-Zhen Wu,Chang-Qing Yi,Guo-Nan Chen,Vivian Wing-Wah Yam
A series of the luminescent Re(I) complexes, [Re(bpy-(CH2OH)2)(CO)3(L1)], [Re(bpy-(CH2OH)2)(CO)3(L2)]+, [Re(bpy-(CH2OH)2)(CO)3(L3)]+, and [Re(bpy-(CH2OH)2)(CO)3(L4)] ((bpy-(CH2OH)2 = 4,4′-bis(hydroxymethyl)-2,2′-bipyridine; L1 = 4-pyridylmethyl lipoate; L2 = [1,2]dithiolane-3-pentyl 4-pyrindylacetate; L3 = 4-pyridinyl-methanol; L4 = 4-pyridinylmethyl pentanoate), were synthesized and characterized. The photophysical properties and cytotoxicity of the complexes and the sensing of esterase based on the gold nanoparticles (Au-NPs) modified with the complexes were also studied. The intense luminescence of the Re(I) complexes was quenched efficiently by Au-NPs due to the energy and electron transfer between the Re(I) fluorophores and Au-NPs. Upon addition of esterase to the mixture, the emission of the Re(I) complexes 1 and 2 system was enhanced significantly by the release of the Re(I) complexes from the surface of the Au-NPs.
研究领域:
无机化学
·
材料科学
·
分析化学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Chao-Ying Gao,Lin Ding,Yang Li,Ning Xu,Yakun Wu,Wenbo Wang,Jinghai Liu,Yang Yang
In the era of global warming, the conversion of carbon dioxide into high-value products has become a widely scrutinized emerging mitigation strategy. Metalation of bpy-containing MOF-253 led to the synthesis of MOF-253–0.5Ag, which acts as an efficient catalyst for the carbonylative cyclization of CO2 with alkyne molecules (such as propynyl alcohols and propynyl amines) at room temperature and ambient CO2 pressure, yielding the corresponding α-alkyl cyclic carbonates and oxazolidinones, thus endowing the catalytic system with bifunctional characteristics. Additionally, the MOF-253–0.5Ag catalyst demonstrated stability, high activity, and recyclability. The mechanisms were further elucidated through experimental results and NMR analysis, demonstrating that Ag(I) can effectively activate the C≡C bonds and hydroxy/amino groups of the substrates.
研究领域:
材料化学
·
环境科学
·
催化化学
✓ 已验证
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Yonghou Xiao,Qiang Guo,Shuohan Yang,Qidong Zhao,Gaohong He
The cuprous-ion-based zeolites constructed by introducing Cu(I) adsorption active sites into zeolite Linde Type A have proved to be efficient in carbon monoxide (CO) adsorption with high selectivity and capacity. However, how to directly fabricate zeolite 4A containing copper species and effectively overcome cuprous ion aggregation during the preparation process is still a challenge. Here, we propose an efficient fabrication method to synthesize highly dispersed Cu(I)-modified octahedral zeolite 4A adsorbents using a molecular complex formed by a hydrogel with a silicon/aluminum molar ratio of 1:1, copper ions, and tetramethylammonium hydroxide (TMAOH) as the template. Zeolite 4A containing copper ions was directly obtained by incorporating the precursor of cuprous ions into the confined space between zeolite 4A channel walls and TMAOH. The target zeolite Cu(I)/4A adsorbent with highly dispersed Cu(I) was constructed after introducing VCl3 as the reducing agent via the solid-state dispersion method during the process of removing the template. In comparison with pristine zeolite 4A, a bimodal microporous pore size distribution was observed in as-synthesized Cu(I)/4A. Cu(I)/4A exhibited an enhanced static (1.15 mmol/g) and dynamic (0.0016 mmol g−1) CO adsorption capacity, respectively, at 25 °C and 1 bar. Moreover, Cu(I)/4A displayed a lower H2 adsorption capacity under identical conditions. Through calculation using the ideal adsorption solution theoretical (IAST) equation, the CO selectivity from the CO/H2 mixture on Cu(I)/4A attained ca. 16.95. Therefore, Cu(I)/4A with highly dispersed Cu(I) was successfully fabricated, and its excellent CO adsorption selectivity and capacity enable it to be potentially applied for the actual deep separation of CO/H2.
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 Sensors
·
2024
·
IF 8.2
Lin He,Yan Zhou,Min Zhang,Mingjian Chen,Yuchen Wu,Lanlin Qi,Lamei Liu,Bin Zhang,Xiaohai Yang,Xiaoxiao He,Kemin Wang
Detection of slight pH changes in skin interstitial fluid (ISF) is crucial yet challenging for studying pathological processes and understanding personal health conditions. In this work, we construct an i-motif DNA based fluorescent ratiometric microneedle sensing patch (IFR-pH MN patch) strategy that enables minimally invasive, high-resolution, and sensitive transdermal monitoring of small pH variations in ISF. The IFR-pH MN patch with advanced integration of both ISF sampling and pH sensing was fabricated from the cross-linking of gelatin methacryloyl and methacrylated hyaluronic acid, wrapping with pH-sensitive hairpin-containing i-motif DNA based fluorescent ratiometric probes in the matrix. Because it is mechanically robust for skin penetration and has high swelling ability, the IFR-pH MN patch could be quickly extracted as sufficient liquid from agarose gel (∼56.4 μL in 10 min). Benefiting from conformation changes of the hairpin-containing i-motif DNA under pH variation and ratiometric fluorescence signal readout, the IFR-pH MN patch could quantitate pH over a small range between pH 6.2 and 6.9 with an accuracy of 0.2 pH units in the mimic skin model. Furthermore, in vivo testing on wound and tumor mouse models indicated the ability of the biocompatible IFR-pH MN patch to penetrate the skin for obtaining transdermal pH values, demonstrating the potential applications in monitoring and intervention of pathological states.
研究领域:
生物医学工程
·
分子生物学
·
传感技术
✓ 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）