Advanced Optical Materials
·
2024
·Vol. 13
·期 2
·2402038
·
IF 8
Li Yuan,Haiqing Zhu,Wei Zhang,Linxin Yao,Yumiao Su,Wenmu Li
Controllable coordination and efficient sensitization of rare earth ions in polymer materials are key to achieving high-performance optoelectronic polymers. By designing aromatic diamines, polyimides are synthesized with 1,10-phenanthroline benzimidazole groups (PBG) in the polymer backbone. Utilizing the coordination between PBG and rare earth ions (Eu 3 ⁺, Tb 3 ⁺), polyimide-rare earth complexes are formed and precisely characterized their structures. The unique coordination allows PBG to effectively sensitize Eu 3 ⁺, resulting in efficient, long-lived red emission. Furthermore, PBG maintains excellent coordination with Eu 3 ⁺ in acidic environments, granting acid-responsive color changes for data encryption. Importantly, PBG sensitization of Tb 3 ⁺ enabled full-spectrum emission (CIE coordinates: (0.31, 0.35)) within a single rare earth-polyimide complex, due to electron transfer among the ions, ligands, and polymer. This leads to the design of a multi-layer PLED device with an optimal external quantum efficiency of 0.43% for white light emission (CIE coordinates: (0.28, 0.34)). Through comparative theoretical and experimental analysis, the photophysical behavior of these coordinated polyimides is explained and explored their photoluminescent and electroluminescent properties. This research integrates the advantages of rare earth elements and polyimides, creating novel luminescent polymers with diverse optical applications, providing a new strategy for designing luminescent coordination polymers.
研究领域:
材料科学
·
高分子化学
·
光电子学
·
稀土化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 7
·2455-2463
·
IF 7.393
Hongjing Wen,Xianzhi Zeng,Xiaoxuan Xu,Wanyi Li,Fei Xie,Zhong Xiong,Shichao Song,Bin Wang,Xiangping Li,Yaoyu Cao
In this work, based on a pH-responsive hydrogel, we report on a reversible data encryption–decryption technique in which the pH channel is employed for data manipulation. Upon alkali or acid stimulation, the hydrogel exhibits a network expansion or shrinkage in response to the pH variations. In particular, pre-doping the hydrogel with silver ions, we demonstrate that data input can be encoded in the hydrogel platform through the direct writing and patterning of silver nanodots. By this means, the scattering signals from the patterned nanodot pixels are converted to the binarized data. Meanwhile, we show the threshold behaviour of the hydrogel system in which dynamic switching of the encoded plasmonic pattern to the optically resolvable/irresolvable state is viable only at finite pH values. By delicately matching pixel spacings of the encoded pattern and the diffraction limit of the deciphering microscopic system, reversible sub-diffraction limit data encryption is achieved by selectively imposing acid and alkali stimulations. The suggested strategy offers a potential solution for optical storage, multiplexed data manipulation, and optical data security.
研究领域:
材料科学
·
光学工程
·
化学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Yujun Wang,Ruiqing Wang,Xiang Zheng Kong,Xubao Jiang,Xiaoli Zhu,Shusheng Li
Multicolor lanthanide-doped polymers have found versatile applications in data encryption, sensing, and smart display. However, multiple components, sophisticated design, and complex preparation procedures are often required. In contrast, their intrinsic and multicolor fluorescence emission is been effectively used. Herein, Eu-doped polyurethane (ETP@PU), integrating tunable multicolor emission, self-healing, and multi-responsiveness, is prepared through a facile route via step-growth polymerization of PU using commercial Eu-ligand (Eu(TTA) 3 Phen, ETP) as a fluorophore. FTIR and XPS analysis demonstrate the successful coordination of Eu 3+ with carbamate groups of PU, which not only enhances the mechanical properties of PU but also bestows unique luminescent properties. With increasing ETP content, the intrinsic fluorescence of PU declines, while that of Eu displays a discernible enhancement, resulting in the tunable multicolor emission. The highest quantum yield of Eu-related emission reaches 71.3% due to the robust coordination and efficient energy transfer between Eu 3+ and PU. Moreover, the ETP@PU exhibits excellent self-healing capacity and multi-responsiveness, and their potential applications are also investigated in the field of light-emitting diodes, data encryption, and self-healing process monitoring. This work provides a facile and efficient strategy to develop multicolor lanthanide-doped polymers promising for various applications.
研究领域:
材料科学
·
光学
·
应用化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yatao Pan,Xiangbo Ding,Lin Cai,Zhongran Wei,Shihong Wang,Zhanpeng Liu,Xia Ran,Lijun Guo
Carbon dots (CDs) with ultra-broadband and time-dependent afterglow photoluminescence (PL) are pivotal for next-generation anti-counterfeiting and dynamic information encryption, yet their rational design remains a formidable challenge in terms of spectral-temporal tunability and mechanistic clarity. Herein, we propose a molecular engineering strategy to synthesize CDs@B 2 O 3 via a one-step fusion heating process, using levofloxacin and 1-pyrenylboronic acid as the carbon source precursors within a boric acid matrix. By properly modulating the electronic state distribution between the green-emitting surface states and the red-emitting core states of the CDs, we achieve full coverage of the visible spectrum from green to the near-infrared region. Mechanistic investigations reveal that the broadband afterglow arises from the synergistic delayed fluorescence (DF) of N-heterocyclic surface molecular states and large conjugated domains that activate red core states. Notably, the increased conjugation degree of the carbon core in L,P-CDs@B 2 O 3 results in a higher proportion of red-emitting states and longer afterglow time, enabling a unique color-changing afterglow that transitions from an initial green through yellow and finally to red within 1 s. The time-resolved afterglow characteristics facilitate high-capacity graphical anti-counterfeiting, demonstrating promising applications in graphical security and information storage with spatiotemporal resolution. These findings not only provide an effective approach for designing smart afterglow nanomaterials but also elucidate the structure-emission relationship in carbon-based systems, offering insights into the rational engineering of multi-modal photoluminescent materials.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
信息安全
·
化学合成
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry Letters
·
2020
·
IF 6.71
Enshan Liu,Tao Liang,Elena V. Ushakova,Bingzhe Wang,Bohan Zhang,Huiqun Zhou,Guichuan Xing,Chunming Wang,Zikang Tang,Songnan Qu,Andrey L. Rogach
Carbon dots (CDs) with efficient excitation and emission in deep-red/near-infrared (NIR) spectral range are important for bioimaging applications. Herein, we develop a simple and effective method to significantly enhance both the absorption and emission of CDs in deep-red/NIR by suppressing nonradiative charge recombination via deprotonation of the CD surface. As compared to aqueous solutions at room temperature, NIR emission of CDs in N,N-dimethylformamide and glycerol experience a 50- and 70-fold increase at −20 °C, respectively, due to enhanced deprotonation ability and viscosity. On the basis of the adjustable NIR fluorescence intensity of CDs, multilevel data encryption in the NIR region is realized by controlling the humidity and the temperature of a CD-ink stamped paper.
研究领域:
材料科学
·
纳米技术
·
光学
·
生物医学工程
·
化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 6
·期 37
·9897-9902
·
IF 5.976
Hong Wang,Peisheng Zhang,Baiju P. Krishnan,Maolin Yu,Jie Liu,Mingju Xue,Shu Chen,Rongjin Zeng,Jiaxi Cui,Jian Chen
The development of switchable white-light emitters is extremely challenging but urgently needed for various applications. We describe a class of switchable fluorescent polymeric nanoparticles (SFPNs) that can alternate their emission color among stable white, cyan, or pink. These SFPNs consist of a dye with cyan-light emission and a spiropyran (SP) derivative with photochromism. When the SP derivative is transferred to its merocyanine state, fluorescence resonance energy transfer (FRET) occurs from the cyan dye to the merocyanine one. In a rational design of transfer efficiency, a stable white-light emission is achieved. This white-light emission can be switched to the cyan-light one upon photoirradiation or pink-light one by solvent-induced swelling. Such multi-color fluorescent alternation is reversible and therefore allows for data encryption. Because of the facile synthesis, excellent long-term stability, fast photo-responsibility, high-contrast fluorescence, and outstanding switchability of these nanoparticles, we envision that they should have great potential in various applications such as high-resolution imaging, white luminescence, and data encryption.
研究领域:
材料科学
·
光学
·
纳米技术
·
光化学
·
数据安全
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 51
·2305364
·
IF 19
Shuoning Zhang,Chang Sun,Jianying Zhang,Shengyu Qin,Jiale Liu,Yunxiao Ren,Lanying Zhang,Wei Hu,Huai Yang,Dengke Yang
With the demand for the diversity and security of information deliveries increasing, advanced security tag for data encryption has attracted great interest from the scientific community. It is promising to achieve composite dynamic information storage by the combination of multisource stimuli-responsive mechanism. Here, mechano- and chemochromism cholesteric liquid crystal elastomers (CLCEs) are prepared by introducing a rhodamine lactam-based functional trigger by two different strategies, one of which is one-pot method and another is postfunctionalization method. The performances of the CLCEs from two strategies are investigated, which are demonstrated to be effective methods in endowing material with new function, and suitable for different application scenarios. The composite material combines the force-induced structural periodicity variation of CLCE and the pigmentary and fluorescent properties changes of the functional trigger caused by the chemical environment. The orthogonal construction of dynamic structural color pattern and reversible pigmentary and fluorescent colors pattern enable the information in the CLCE to display double encryption mode, which exhibits great potential in the information storage and anti-counterfeiting.
研究领域:
材料科学
·
光电
·
信息安全
·
化学
·
高分子科学
✓ 已验证
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Wenyan Zeng,Qingyuan Jiang,Chaofan Ruan,Wang Ni,Changchang Zhu,Xueling Zeng,Xuan Shi,Rongke You,Ning Ma,Fang-Chang Tsai
The emergence of stimuli-responsive fluorescence anti-counterfeiting technology has garnered increasing attention in the era of intelligent internet. Smart fluorescent hydrogels combine the characteristics of luminous materials with the unique structure of hydrogels, offering the potential for dynamic reversible erasing and multi-tiered data encryption. In this work, a fluorescent hydrogel was constructed by zeolitic imidazolate framework-8 loaded with fluorescein and then mixed with polyvinyl alcohol hydrogel, sodium carboxymethyl cellulose and borax, which could be used for image hiding in visible light. The reversible bonds cross-linked fluorescent hydrogel was stretchable and self-healing with a three-dimensional network structure. The hydrogel presented bright green fluorescence under 365 nm UV light, which was quenched by adding copper ions. Meanwhile, the imprint of the hydrogel could be cleared by L-Cysteine and repeatedly recorded information many times. The alkali-induced shape memory capability was further utilized to achieve multi-tiered data encryption by deforming it to a 3D-specific shape through folding. The rewritable and multi-dimensional encrypted hydrogel is expected to improve data security and reduce resource consumption.
研究领域:
材料科学
·
化学
·
纳米技术
·
信息安全
✓ 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）