CHEMISTRY-A EUROPEAN JOURNAL
·
2022
·Vol. 29
·期 13
·e202203554
·
IF 5.02
Yi Zhang,Zhangdi Lu,Anrui Feng,Jacky W. Y. Lam,Zhenguang Wang,Yu-e Shi,Ben Zhong Tang
Graphical Green-emissive copper nanoclusters (Cu NCs) were synthesized at a relatively high reaction temperature (80 °C) and an extended reaction time to 144 h. The photoluminescence of Cu NCs could be selectively enhanced by adding Al 3+ , attributed to their aggregation-enhanced emission features. Selective detection of Al 3+ is of great significance both for the benefit of human health and environmental safety considerations. In this work, a sensitive and selective fluorescence assay for Al 3+ was proposed based on the green-emissive Cu nanoclusters (Cu NCs). Different from the commonly reported works, the green emissive Cu NCs showed dual emission bands at 450 and 510 nm, attributed to the reaction product between polyvinyl pyrrolidone and ascorbic acid and the Cu core, respectively. Al 3+ could induce the aggregation of Cu NCs by forming covalent bonds, which results in the enhancement of photoluminescence intensity. This enhancement phenomenon is rather selective to Al 3+ , which endows the detection in real samples. These results provide new insights for the fluorescence mechanisms of metal NCs, which also provided a functional luminescent material for various applications, such as chemical sensing, bioimaging and photoelectric devices.
研究领域:
材料科学
·
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymer Chemistry
·
2017
·Vol. 8
·期 17
·2713-2722
·
IF 5.375
Jia Wang,Baixue Li,Dehua Xin,Rongrong Hu,Zujin Zhao,Anjun Qin,Ben Zhong Tang
The polyhydroXations, such as polyhydrothiolation and polyhydroamination, of alkynes have been well-established. However, the polyhydroalkoxylation is rarely reported. In this paper, the polyhydroalkoxylation of aromatic diynes was successfully developed in the presence of a superbase, phosphazene base (t-BuP4). A series of soluble and regio-regular anti-Markovnikov additive poly(vinyl ether)s with high molecular weights (Mw up to 40 600) were obtained in high yields (up to 99%). All the polymers are thermally and morphologically stable. The tetraphenylethene (TPE)-containing P1a2a, P1a2b and P1a2c showed unique aggregation-enhanced emission (AEE) characteristics, and their aggregates could be used for explosive detection with a superamplification quenching effect. The poly(vinyl ether)s are degradable under acidic conditions. Thus, this work not only established a new polymerization but also generated a series of functional polymeric materials that are potentially applicable in optoelectronic and biomedical fields.
研究领域:
化学
·
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2016
·Vol. 45
·期 27
·11129-11136
·
IF 4.177
Yue Su,Xiuling Liu,Pengpeng Lei,Xia Xu,Lile Dong,Xianmin Guo,Xingxu Yan,Peng Wang,Shuyan Song,Jing Feng,Hongjie Zhang
Core–shell–shell heterostructures of α-NaLuF4:Yb/Er@NaLuF4:Yb@MF2 (M = Ca, Sr, Ba) have been successfully fabricated via the thermal decomposition method. Upconversion nanoparticles (UCNPs) were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), upconversion luminescence (UCL) spectroscopy, etc. Under 980 nm excitation, the emission intensities of the UCNPs are remarkably enhanced after coating the MF2 (M = Ca, Sr, and Ba) shell. Among these samples, CaF2 coated UCNPs show the strongest overall emission, while BaF2 coated UCNPs exhibit the longest lifetime. These results demonstrate that alkaline earth metal fluorides are ideal materials to improve the UCL properties. Meanwhile, although the lattice mismatch between the ternary NaREF4 core and the binary MF2 (M = Sr and Ba) shell is relatively large, the successfully synthesized NaLuF4:Yb/Er@NaLuF4:Yb@MF2 indicates a new outlook on the fabrication of heterostructural core–shell UCNPs.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Yanyan Cheng,Shunfei Qiang,Jiaqi Li,Wenbo Wei,Yanmin Kuang,Wenkai Zhang,Xiaomin Fang,Tao Ding,Lijun Guo,Yujie Chen,Xudong Chen
Carbon dots (CDs) have great potentials in quantum emitters due to their simple synthesis, low cost, high stability, and tunable band gap; however, the low solid-state emission efficiency, as well as nanosecond-scale radiative lifetime, limits their applications requiring bright and fast emission. Here, a bright and ultrafast emission of red-emissive carbon dots (R-CDs) with narrow bandwidth (<30 nm) is achieved at room temperature by coupling with a plasmonic nanopatch antenna (NPA). The NPA manufacturing combines a conventional spin-coating process with a conformal transfer-print thin film technology, providing a widely applicable nanocavity for field enhancement with uniform quality in centimeter scale and accurate control of the position of emitters. The effective NPA–CD coupling generates an increase in the emission intensity of a factor of 76 and a shortened radiative lifetime of 80 ps, which demonstrates an 82-fold faster rate than the emission rate of uncoupled R-CDs. The NPA structure also shows striking enhancement of Raman spectra of carbon dots with an enhancement factor over 105. These results may benefit the low-cost and large-scale fabrication of plasmonic cavity and enable carbon dots to find applications in quantum optics, from low-threshold nanolaser to single-photon source.
研究领域:
光学
·
材料科学
·
量子光学
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2025
·
IF 7
Congcong Chen,Yifan Zhang,Huan Liu,Xuanyu Zhang,Zhongshiqi Luo,Jiawei Lin,Yuhong Mao,Rui Chen,Songhao Guo,Xujie Lü,Lingling Mao
Low-dimensional metal halides, especially zero-dimensional (0D) compounds, are important derivative members of the halide perovskite family primarily due to their highly emissive properties. Here, we report two highly luminescent 0D lead bromides, (BPP)2PbBr4 and (BPPF)2PbBr4·2H2O, abbreviated as BPP-0D and BPPF-0D (BPP = benzyltriphenylphosphonium, BPPF = (4-fluorobenzyl)triphenylphosphonium). Both compounds share mutual seesaw inorganic units [PbBr4]2– separated by bulky organic cations. BPP-0D and BPPF-0D emit yellow and green lights, respectively, with photoluminescence (PL) quantum yields (PLQYs) of ∼15 and ∼55% at ambient conditions. Both compounds show excellent environmental stability and practical applications in light-emitting diodes. Upon compression, BPP-0D experiences a rapid decrease in PL intensity, accompanied by an obvious change in its emissive color from yellow to blue. In contrast, BPPF-0D demonstrates excellent optical stability, retaining its green emission, while the PL increases by ∼1.7 times at 0.8 GPa and the PLQY increases to 93%. For BPPF-0D, the presence of an extra highly electronegative fluoride group adds many more noncovalent interactions, such as C–H···F hydrogen bond and F···F interactions. These interactions strengthen the structural and optical stabilities of BPPF-0D, maintaining its emission peak position with elevated pressure. The straightforward comparison between two similar compounds and their optical properties under pressure modulation underscores the importance of engineering organic cations to control and optimize their properties.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Hao Yuan,Huangmei Zhou,Yu Zhao,Hao Tan,Rodolphe Antoine,Sanjun Zhang
Metal nanoclusters (NCs) have emerged as a class of promising luminescent materials for sensing, but the low luminescence efficiency hindered their applications. In this work, highly luminescent composites were synthesized by encapsulating D-penicillamine (DPA) capped silver nanoparticle-nanoclusters (AgNP-NCs) into zeolitic imidazolate frameworks (ZIF-8) (denoted as AgNP-NCs@ZIF-8) and were applied for simultaneous detection and removal of chromium(Ⅵ). The photoluminescence intensity of the AgNP-NCs was enhanced by (66 ± 5) folds due to the confinement of ZIF-8 shell, and the lifetime was prolonged from (50.9 ± 1.8) ns to (15.9 ± 0.4) μs. More importantly, thanks to the strong luminescent property of AgNP-NCs and porous structure of the ZIF-8 shell, the AgNP-NCs@ZIF-8 composites not only allowed for the detection of Cr(Ⅵ) as luminescent probe but also exhibited good adsorption capacity of Cr(Ⅵ). The luminescence intensity decreased linearly with Cr(Ⅵ) concentration in the range of 40 to 400 μM, and the limit of detection was determined to be (23.5 ± 0.8) μM. They also exhibited high selectivity toward total chromium in various interfering metal ions and good performance in real water samples. These results indicated that AgNP-NCs@ZIF-8 could serve as an attractive candidate for simultaneous detection and removal of Cr(Ⅵ) in environmental monitoring and protection.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Wenqian Cao,Zhengluan Liao,Hongxu Chen,Yuanjing Cui,Zhiyu Wang,Guodong Qian
Nanothermometers can detect changes in the local temperature in living cells and in vivo, revealing fundamental biological properties. Despite the exploration of different temperature-responsive materials, the design and development of temperature-sensing probes with high brightness and high sensitivity remain a daunting challenge. Here, we employed the UiO-66 type metal–organic frameworks (MOFs) to anchor UNCPs on the surface of the MOFs for constructing MOF@UCNPs nanohybrids. The in situ composite method with MOFs leads to the coordination interaction between the ligands and the surface of UCNPs, enabling controlled composite formation between different MOFs and UCNPs. Remarkably, the surface interaction favors the anomalous thermo-enhanced luminescence, achieving a 35-fold enhancement of UiO-66@NaYF4:Yb/Tm at 413 K. Furthermore, these MOF@UCNPs nanohybrids with thermo-enhanced luminescence are developed as multifunctional biological probes for bioimaging and intracellular temperature sensing, demonstrating a high thermal sensitivity of 1.92% K–1 in the physiological temperature range. Based on these findings, temperature monitoring of the local position was successfully carried out by the designed MOF@UCNPs nanoprobes in vivo. These findings underscore the potential of MOF@UCNPs nanohybrids, opening up new avenues for the development of a multifunctional platform for biological analysis.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2018
·Vol. 24
·期 41
·10383-10389
·
IF 5.16
Yanzi Xu,Lin Ren,Dongfeng Dang,Ying Zhi,Xiaochi Wang,Lingjie Meng
Graphical A self-isolated enhanced emission (SIEE) strategy through flexible alkyl chains is proposed to suppress and prevent the emission-quenched π–π stacking in aggregated solid states. As observed, remarkable emission efficiency with quantum yields up to 99.72 % in solution and 77.46 % in solids are achieved for DBBT-C8 (see figure). Currently, the commonly developed organic luminescent materials (OLMs) usually exhibit poor luminescent performance in aggregated solid states compared with their well-dissolved solution states, making it a tough goal to achieve the highly emissive dual-state emission. To overcome this limitation, a “self-isolated enhanced emission” (SIEE) strategy through flexible alkyl chains to suppress the emission-quenched π–π stacking in solids is proposed here and, based on this guideline, remarkable emission efficiency with photoluminescence quantum yields up to 99.72 % in solution and 77.46 % in the solid state are achieved for the SIEE constructed DBBT-C8, which is then successfully used in solid-state displays and data encryption.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Chemical Science
·
2021
·Vol. 12
·期 37
·12437-12444
·
IF 9.825
Xiaopei Li,Dongdong Wang,Yongjie Zhang,Wenqi Lu,Songqiu Yang,Guangjin Hou,Zhenchao Zhao,Haijuan Qin,Yahui Zhang,Minmin Li,Guangyan Qing
Aggregation-induced enhanced emission (AIEE) molecules have significant applications in optoelectronics, biomedical probes and chemical sensors, and large amounts of AIEE molecules have been reported since the concept of AIEE was proposed. Most aromatic AIEE molecules have complex structures consisting of multiple aromatic rings and/or polycyclic skeletons. In this study, we find that 2-aminophenylboronic acid (2-APBA) with a simple structure is highly emissive in the solid state. Further studies reveal that 2-APBA exists in a dimeric form, and the 2-APBA dimer is a novel AIEE molecule. The underlying AIEE mechanism is that the 2-APBA dimeric units aggregate through intermolecular interactions to produce highly ordered molecular packing without the presence of π–π stacking interactions that would lead to aggregation-caused quenching. Furthermore, the 2-APBA dimer aggregates could reversibly transform into its non-fluorescent monomer form driven by new kinds of dynamic covalent B–N and B–O bonds, illustrating its good potential in molecular recognition, nanogating, chemo/bio-sensing and controlled drug release.
研究领域:
有机化学
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
·
2017
·Vol. 55
·期 22
·3690-3696
·
IF 2.952
Wei Huang,Hongxia Yan,Song Niu,Yuqun Du,Luyao Yuan
Fluorescent polymers without π-aromatic structure have been a hot spot in recent years. Polycarbonate has been applied in industry for many years; however, the fluorescent behavior of the polycarbonate has not been reported yet. Therefore, a kind of hyperbranched polycarbonate (HBPC) has been synthesized under solvent and catalyst-free condition. Unexpectedly, the novel HBPC containing no conventional chromophores exhibits unimagined bright blue fluorescence under the irradiation of 334 nm UV light. The intensity of the HBPC fluorescence is rising in step with its concentration going up, showing an aggregation-induced enhanced emission (AIEE). It is more interestingly that the fluorescence of HBPC could be affected by pH and metal ions. Specifically, the fluorescence of HBPC is extraordinarily sensitive to the Fe 3+ . TEM micrographs show that the HBPC self-assemble to clustering in water. Rudimentary investigation illustrates that the formation of cluster accounts for the unexpected fluorescence in the HBPC. This phenomenon is typical of Clustering-Triggered emission (CTE). This study exhibits a novel route for the design of CTE fluorescent polymers. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017 , 55 , 3690–3696
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Yu Xie,Cong Cao,Yu Li,Gaojun Ren,Jinsong Wang
Multicolor lanthanide upconversion nanophosphors (UCNP) that converted near-infrared radiation into emission at the short wavelength show excellent photophysical properties, but low conversion efficiency and fluorescence quenching of surface modification still limits its further application. Here, we report a dye-sensitized composite nanomaterials with enhanced upconversion under 980 nm excitation. We systematically studied the influence of different conditions on upconversion luminescence, including competitive luminescence center, dye molecules, dye concentration and different composite systems . The results indicated the upconversion fluorescence can be enhanced 20 times when coated with phosphatidylcholine (PC). The compound structure wrapped with PC gives full play to the advantages of promoted upconversion, showing a good biomedical application prospect and providing more opportunities for biomedical and energy application.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Qi He,Lin Yin,Yu-zhen Li,Hu Xie,Qian Tang,Wei Shen,Chengbin Gong
By functionalizing various polyphenyl nuclei with ester groups, five kinds of polyphenyl benzoate based electrochromic materials (M1–M5) are synthesized and characterized. These materials show typical aggregation-induced emission and aggregation-enhanced emission in water/N-methylpyrrolidone, good electrochemical properties, and an obvious electrochromic phenomenon. In the process of electrochemical reduction, each material shows distinct and well-separated redox couples, the introduction of ester moieties makes electron transfer much easier compared to the polyphenyl nuclei, and the synergistic effect of the ester group and polyphenyl structure reduces the LUMO level of the corresponding polyphenyl benzoates. In contrast, the polyphenyl nuclei markedly affect their electrochromic properties, and the electrochromic devices based on M1–M5 exhibit five different colored states. By combining with density functional theory calculations, it is found that an appropriate amount of benzene rings in the central benzene cores (M2 and M4) can effectively improve the coloration efficiency, response time, and switching stability; fewer benzene rings in the central benzene core (M1) cannot achieve stable conjugation of the material in the reduced state, while an excess of benzene rings in the central benzene core (M5) leads to excessive molecular volume, and this will lead to space congestion and is not beneficial for electron transfer. The application of M1–M5 in multi-colored functional display devices is explored, indicating its potential application prospect in display fields.
研究领域:
材料科学
·
电化学
·
光学
✓ 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）