ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Liuyan Tang,Shanshan Liao,Jinqing Qu
Aiming at the problem that the reported smart optical metallohydrogels were limited with poor mechanical properties, we reported here a novel smart optical metallohydrogel (Al-hydrogel) with excellent elongation, shape-memory ability, self-healing property, and controllable fluorescence intensity. The Al-hydrogel was obtained by the HHPMA–Al3+ and carboxylate–Al3+ coordination after one-pot micellar copolymerization of acrylic acid (AAc), acrylamide (AAm), and hydrophobic arylhydrazone-based ligand (HHPMA). This hydrogel was able to extend up to 5000% of its original length without fracture. Its emission intensity was tunable by OH–/H+ or Zn2+/AAc and increased by 500% with 0.1 M OH– or Zn2+. Its tunable fluorescence enabled us to repeatedly pattern it. A reversible system consisting of Fe3+/H+, was implemented to control the shape of the Al-hydrogel, endowing the Al-hydrogel with shape-memory ability. This highly stretchable and multifunctional Al-hydrogel has potential applications in information transmission, wearable devices, and flexible sensors.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Chao Nan Zhu,Tianwen Bai,Hu Wang,Wei Bai,Jun Ling,Jing Zhi Sun,Feihe Huang,Zi Liang Wu,Qiang Zheng
Bioluminescence is widespread in nature such as the jellyfish, which inspires scientists to design polymer hydrogels with tunable fluorescence. However, it remains a big challenge to develop white-light-emitting hydrogels with local tunability of the fluorescent behavior. Herein, we report a white fluorescent hydrogel prepared by one-pot micellar copolymerization of hydrophilic acrylamide and hydrophobic single donor–acceptor chromophore monomer, in which the unimer and the dimer of the chromophore coexist and generate high- and low-energy emission, respectively, under excitation. The fluorescent behavior of the hydrogel can be well tuned by phototreatment or heat treatment that induces unimer-to-dimer transformation of the chromophore and thus variation of the fluorescent color from blue to white and then to yellow. The fluorescence can also be reversibly switched off by forming terpyridine–Cu2+ chelate complexes and recovered by using chelating agent to extract the Cu2+ ions out of the gel matrix. These properties afford patterning the fluorescent hydrogel, which is transparent under daylight yet shows the pattern under ultraviolet light. These patterned fluorescent hydrogels should find applications in protected message display for improved information security.
研究领域:
材料科学
·
高分子化学
·
生物仿生学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Yuan Zhan,Lifeng Lin,Min Chen,Limin Wu
Dual-state emission (DSE) fluorophores with strong photoluminescence in both solution and solid states have wide applications in fluorescent probes and photoelectric devices. However, most of the existing DSE fluorophores involve complex synthetic strategies or only one or two emission colors in the solid state, which may hinder their practical applications. Herein, we report a facile and effective strategy to fabricate a kind of novel adjustable DSE fluorophore TPAA–Cu based on the small molecule terephthalic acid (TPA) and ascorbic acid (AA) with CuCl2 as the catalyst. Not only can the TPAA–Cu solution emit blue, blue-green, and yellow colors depending upon the pH of solution, but also it shows reversible pH-tunable fluorescence colors. More importantly, corresponding TPAA–Cu solid fluorophores with blue, blue-green, and yellow colors can also be obtained with the quantum yields of 16.3, 26.7, and 29.6%, respectively.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Research
·
2019
·Vol. 13
·期 1
·52-60
·
IF 8.515
Yan Fanyong,Jiang Yingxia,Sun Xiaodong,Wei Junfu,Chen Liang,Zhang Yuyang
Multicolor emissive carbon dots (M-CDs) have tremendous potential applications in manifold fields of bioimaging, biomedicine and light-emitting devices. Until now, it is still difficult to produce fluorescence tunable CDs with high quantum yield across the entire visible spectra. In this work, a type of M-CDs with concentration-tunable fluorescence and solvent-affected aggregation states was synthesized by solvothermal treatment of citric acid (CA) and 1-(2-pyridylazo)-2-naphthol (PAN) and the formation mechanism was monitored by different reaction time and raw material ratio. The fluorescence spectra of M-CDs in organic solvents can range from 350 to 750 nm by adjusting the concentration. M-CDs possess different aggregation states in water and organic solvents, accompanied by different fluorescence emission, which is attributed to the different surface states of various component CDs in M-CDs. Moreover, the obtained products can be uniformly dispersed into polymethylmethacrylate (PMMA) solutions as well as epoxy resins to fabricate transparent CDs/PMMA films and CDs/epoxy composites, which can effectively prevent the aggregation and produce multicolor and white light-emitting diodes (WLED). In addition, the prepared WLED with Commission Internationale de L’Eclairage (CIE) of (0.29, 0.31) by using M-CDs/epoxy resin as packages, demonstrating the M-CDs exhibit potential applications for light-emitting devices.
研究领域:
材料科学
·
光学
·
生物成像
·
光电子器件
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2020
·
IF 9.567
Yi Wang,Ge Guo,Jialin Gao,Zhibin Li,Xueer Yin,Changqing Zhu,Yunsheng Xia
To date, dynamics monitoring oxidative stress on time resolution in vivo has not been achieved due to the limitation of probes, causing the difficulty to comprehensively understand its biological behaviors and functions. Herein, we propose a novel probe, namely highly bright and color tunable “multicenter-emitting” carbon dots (C-dots), for dynamics monitoring oxidative stress in vivo. Combined with experiments and theoretical calculations, we reveal that each C-dot contains multiple conjugated polyaromatic units on their surfaces, which act as fluorescent emitting centers and response sites of hypochlorous acid (HClO) to achieve an instantaneously color-change readout (107 nm, from yellow-green to blue). Accordingly, the proposed C-dots enable the observation of HClO burst and dynamics evolution at fresh wounds of zebrafish larvae. Such a burst occurs only at 1–5 s after cutting, which is an unprecedented thought regarding oxidative stress dynamics. Furthermore, the present study indicates that HClO molecules are principally generated in situ rather than migration.
研究领域:
化学
·
材料科学
·
生物学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 20
·4523-4528
·
IF 7
Weiqiang Lin,Jialin Huang,Shuang Guo,Meijiao Zhao,Xu Chen,Qiuping Shang,Ruoyuan Zhang,Guangfu Liao,Judun Zheng,Yuhui Liao
Syphilis, caused by Treponema pallidum (T. pallidum), is associated with the oxidative stress due to its inflammation-like symptom, and detecting the reactive oxygen species (ROS) is crucial for monitoring the infectious process. Herein, we design and synthesize a perylene-based tunable fluorescent probe, PerqdOH, which can detect endogenous O2˙− during T. pallidum infection. The fluorescence peak shifted from 540 nm to 750 nm with increasing O2˙− levels. Besides, both decreased green fluorescence and enhanced red fluorescence could be observed simultaneously during the in vitro infection, providing the real-time monitoring of intracellular O2˙− caused by T. pallidum. Furthermore, the probe exhibited a remarkable signal in the treponemal lesions on the back of a rabbit model. Taken together, our synthesized PerqdOH holds great potential for application in clarifying the infectious process caused by T. pallidum in real time.
研究领域:
微生物学
·
传染病学
·
分子生物学
·
荧光成像
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Qiliang Chen,Han Xu,Shuai Yang,Guoying Zhao,Langping Dong,Jingshan Hou,Yongzheng Fang
A series of color-tunable Na 2 Ca(PO 4 )F:Eu 2+ , Mn 2+ phosphors were prepared by solid state reaction. The structure, as well as the photoluminescent properties of the as-prepared phosphor were investigated. The energy transfer process between Eu 2+ -Mn 2+ was also discussed. The phosphor demonstrates luminescence in the range of 420 nm–750 nm under UV excitation. Specifically, the emission spectra comprise green light (420–550 nm) attributed to the 4f-5d transition of Eu 2+ ions, and orange red light (550–750 nm) resulting from the 6 A 1 → 4 A 1 ( 4 G), 4 E( 4 G) transitions of Mn 2+ ions. An effective dipole-dipole energy transfer has been confirmed to occur between the co-doped Eu 2+ and Mn 2+ ions. The luminescent color of the as-prepared phosphors can change from blue to yellow, and finally to orange red by adjusting the doping amount of the co-doped ions. The optimal sample's EQE reached 20.59% due to the high absorption efficiency. Finally, a 400 nm violet light chip excited white LED with a high color rendering index (CRI) of Ra = 98 was fabricated by using the as-prepared Na 2 Ca(PO 4 )F:0.02Eu 2+ ,0.04Mn 2+ phosphor in combination with the commercial blue Sr 5 (PO 4 ) 3 Cl:Eu 2+ phosphor and red CaAlSiN 3 :Eu 2+ phosphor. The results indicated that the developed phosphor holds notable potential for application in in the field of sunlike healthy lighting.
研究领域:
材料科学
·
光电子学
·
固态照明
·
无机化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2018
·Vol. 6
·期 14
·1800115
·
IF 7.43
Junkai Ren,Jibin Sun,Xingming Sun,Rui Song,Zheng Xie,Shuyun Zhou
In this work, an efficient strategy is proposed to obtain single-type carbon dots with precisely controlled up/down-conversion photoluminescence under both liquid and solid states. Tunable fluorescence from green to red color can be achieved via either changing the solvents or matrices composition, or adjusting the concentration of carbon dots. In particular, the photoluminescence of the carbon dots can be linearly modulated by adjusting the polarity of the solvent, which is attributed to the surface-state fluorescence mechanism. That is, the increase of solvent polarity causes the decrease of the highest occupied molecular orbital–lowest unoccupied molecular orbital energy levels, and therefore leads to the bathochromic shift of fluorescent emission. Meanwhile, the as-prepared carbon dots and their hybrids possess excellent thermal stability. Thus, the obtained carbon dots are employed into different solid matrices as multicolor phosphors to fabricate white light-emitting diodes that are suitable for indoor lighting. In addition, the realization of precisely controlled photoluminescence from the single-type carbon dots will have wide applications in luminescent fields.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
光子学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 17
·175705
·
IF 3.953
Qian He,Junkai Ren,Yaodong Liu
In this study, carbon dots (CDs) synthesized by hydrothermal method with amino-rich surface exhibit tunable fluorescence across entire visible range by simply controlling the concentration. A comprehensive comparison has been performed for the first time between concentration-induced aggregation of the single-type CDs and electrostatic-induced agglomeration of opposite-charged CDs in terms of their fluorescence properties. Experimental results show that both the aggregation of CDs and internal absorption filtration are possible causes of the concentration-dependent fluorescence emission. Subsequently, the inter distance of adjacent CDs in their aggregates was enlarged by forming rigid double-stranded DNA (dsDNA) between adjacent CDs through base pairing. It is clear that the contact of CDs induces the changes of fluorescence emission and light absorption. Through a better understanding of the mechanisms behind concentration-induced multicolor emission, this work can provide a novel strategy to develop the advanced applications of CDs.
研究领域:
材料科学
·
纳米技术
·
光学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Caizhen Liang,Xiaobao Xie,Qingshan Shi,Jin Feng,Dandan Zhang,Xiaomo Huang
Absract Intrinsic dual-emission carbon dots (CDs) with long wavelength and self-calibration attributes are critical in fluorescence sensing and imaging, but their synthesis remains a great challenge. Here, nitrogen/sulfur-doped dual-emission CDs (NS-CDs) of different sizes were controllably synthesized by solvothermally treatment of sodium alginate (SA) and glutathione (GSH) in formamide. Interestingly, these as-prepared NS-CDs exhibit enchanting dual-emission behavior at 480 and 650 nm, tunable fluorescence, superior photostability, and high nitrogen level up to 19.57%. The decreasing mass ratio of SA/GSH for the synthesis can lead to larger size and lower graphitic nitrogen for NS-CDs, ultimately giving the enhanced photoluminescence (PL) and tunable fluorescence changing from cyan to white-blue. The selected dual-emission NS-CDs showed superior selectivity and sensitivity for ratiometric Fe 3+ sensing with a detection limit as low as 0.56 μM because of the aggregation of NS-CDs induced by Fe 3+ , and achieved the Fe 3+ detection in environment water. Moreover, the fluorescence-tunable NS-CDs possessing plenteous hydrophilic groups exhibit excellent biocompatibility and unprecedented localized capability for specific cell membrane imaging. This study designs a facile and economical strategy to prepare dual-emission CDs with long wavlength, tunable fluorescence and high nitrogen level, which present bright prospects in environmental monitoring and cell imaging.
研究领域:
材料科学
·
分析化学
·
生物医学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xiao-Fang Hou,Xu-Man Chen,Hari Krishna Bisoyi,Qi Qi,Tianchi Xu,Dongzhong Chen,Quan Li
Developing an artificial dynamic nanoscale molecular machine that dissipatively self-assembles far from equilibrium is fundamentally important but is significantly challenging. Herein, we report dissipatively self-assembling light-activated convertible pseudorotaxanes (PRs) that show tunable fluorescence and enable deformable nano-assemblies. A pyridinium-conjugated sulfonato-merocyanine derivative (EPMEH) and cucurbit[8]uril (CB[8]) form the 2EPMEH ⊂ CB[8] [3]PR in a 2:1 stoichiometry, which phototransforms into a transient spiropyran containing 1:1 EPSP ⊂ CB[8] [2]PR when exposed to light. The transient [2]PR thermally relaxes (reversibly) to the [3]PR in the dark accompanied by periodic fluorescence changes that include near-infrared emission. Moreover, octahedral and spherical nanoparticles are formed through the dissipative self-assembly of the two PRs, and the Golgi apparatus is dynamically imaged using fluorescent dissipative nano-assemblies.
研究领域:
化学
·
纳米技术
·
分子机器
·
材料科学
·
生物物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2022
·Vol. 18
·期 27
·2201826
·
IF 15.153
Jia Kong,Wenxin Li,Shixuan Zhao,Jiaxing Zhang,Tianli Yue,Yuefei Wang,Yinqiang Xia,Zhonghong Li
Cephalopods possess a dynamic coloration behavior to change their iridescence due to the concentration-induced optical properties of chromatophores and hierarchical assembly of reflectin. However, cephalopods rarely have iridescence in the darkfield. It would be interesting to develop color-tunable fluorescent hierarchical nanoassemblies with concentration-encoded emission. Herein, to construct the bioavailable fluorophore with dynamic coloration properties, a histidine-rich peptide is designed, which can self-assemble into hierarchical nanoassemblies stabilized by hydrogen bonds and π–π stacking interactions. The peptidyl nanoassemblies emit fluorescent iridescence, encompassing the blue to orange region due to the assembly-induced emission. The fluorescence of histidine-rich peptides is color-tunable and reversible, which can be dynamically controlled in a concentration-encoded mode. Due to the coloration ability of histidine-rich peptides, fluorescent polychromatic human cells are developed, highlighting its potential role as a fluorescent candidate for future applications such as bioimaging, implantable light-emitting diodes, and photochromic camouflage.
研究领域:
材料科学
·
生物材料
·
生物医学工程
·
纳米技术
·
光学
✓ 已验证
DOI
PubMed
高影响因子
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