Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 31
·10527-10534
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IF 6.4
Peng Yang,Yifan Xie,Li Wen,Liyu Gan,Linxiao Deng,Hongli Zhang,Jiahe Li,Zeyu Feng,Chutian Zhang,Lixin Xu,Gang Zou
Achieving strong and dynamic tunable chiroptical responses in flexible films is highly desirable for potential applications including 3D optical displays, biosensors, and so on. Recently, controlled twisted stacking of two anisotropic layers became a popular strategy to fabricate artificial chiral nanostructures. However, in most cases, their structure and chiroptical responses are fixed, limiting their practical applications. Herein, we employed polydiacetylene (PDA)–Cs+ and PDA–Zn2+ assemblies as the individual layers within the twisted stacking structures and the hybrid films exhibited giant optical activity as well as excellent mechanical deformability. The chromatic transitions of the PDA layer under in situ water or electrothermal stimuli enable simultaneous control of two circular dichroism (CD) characteristics (magnitude and spectral position). By taking advantage of such programmable chiroptical responses, we demonstrate that PDA films have potential for full color, fast responsive, and circular polarization-based multiplex laser displays and higher-dimensional anti-counterfeiting applications. This work not only provides flexible chiral PDA films with strong and dynamic tunable chiroptical responses but is also of great fundamental value for the rational design of smart chiroptical devices.
研究领域:
材料科学
·
光学
·
生物传感
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jing Li,Yue Li,Wenhua Zhao,Li Liang,Edwin Yue Bun Pun,Hai Lin
Dynamically stimulated color-changing materials provide channels within a multidimensional spatial platform and hold significant potential in the field of information bearing. However, manipulating the photochromic conversion of individual lanthanide emitters and external stimuli to achieve color-switchable emission remains a challenge. Here, multiphonon relaxation between energy levels and cross-relaxation among ions have been manipulated to control the population distribution of different energy levels in Eu 3+ ions doped ultra-low-phonon energy Cs 2 NaYCl 6 (CNYC) crystals, finally achieving full-spectral color switching. Interestingly, the introduction of Tb 3+ , not only enriches the interaction of color information in the spatial dimension, but the water-stimulated phase transition, which triggers the energetic coupling between the Tb 3+ and Eu 3+ ions in the lattice. By controlling the water-soaking time, the reversible change in luminescence color from red-orange to yellow to green have been observed. When these materials encode information, the effectiveness of anti-counterfeiting is verified by demonstrated experiment. In this study, a breakthrough in reversible phase transition of CNYC triggered by water have been observed, and a multidimensional synergistic anti-counterfeiting platform, encompassing spacetime security − photoresponsive channel switching − stimulus remodeling, have been innovatively established. These have promoted the development and improvement of anti-counterfeiting mechanisms.
研究领域:
材料科学
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光学
·
信息加密
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Sisi Li,Yajing Cai,Jiaying Situ,Biwen Wang,Beichen Ying,Jin He,Zhao-Qing Liu,Jianle Zhuang,Yibo Chen
Multi-mode responsive optical materials with versatile application prospects for optical sensing, optoelectrical devices, and information encryption are highly desired. Here we integrate fluorescent carbon dots onto the hollow MnO 2 spheres, and modulate the interaction between them to achieve a water-stimulated responsive system with dual-mode dynamic signals in both fluorescence and structural color. The composite film shows a structural color shifting from blue to green as well as displays a fluorescence “on” in the presence of trace water, with both changes capable of being reversibly switched up to 10 times. The amide bond between the two components enables the controllable dispersion and aggregation of the carbon dots which is essential to the reversibility. Fabrication of several security labels with separate information in structural color and fluorescence channels demonstrates the application potential of the composite. This work provides a concise route to develop new multi-mode responsive optical materials for applications in anti-counterfeiting, sensing, and coding.
研究领域:
材料科学
·
光学工程
·
纳米技术
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产品关联
DOI
高影响因子
Science Advances
·
2022
·Vol. 8
·期 8
·
IF 14.957
Dan Li,Jie Yang,Manman Fang,Ben Zhong Tang,Zhen Li
Achieving stimulus-responsive ultralong room temperature phosphorescence (RTP) in organic materials especially with full-color tunable emissions is attractive and important but rarely reported. Here, a strategy was reported to realize stimulus-responsive RTP effect with color-tunable emissions by using water as solvent in the preparation process without any organic solvent through covalent linkage of arylboronic acids with different π conjugations and polymer matrix of polyvinyl alcohol. The yielded polymer films exhibit outstanding RTP performance (2.43 s). Furthermore, an excitation-dependent RTP film was obtained, and the afterglow color changes from blue to green, then to red as the excitation wavelength increases. The RTP property of all the above materials is sensitive to water and heat stimuli, because the rigidity of the system could be broken by water. Last, they were successfully applied in a multilevel information encryption and multicolor paper and ink.
研究领域:
材料科学
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光学材料
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高分子科学
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刺激响应材料
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磷光
·
信息安全
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 9
·2827-2832
·
IF 4.174
Binbin Zhang,Xuelin Dong,Yuxiang Xiong,Qi Zhou,Shan Lu,Yonggui Liao,Yajiang Yang,Hong Wang
Preparing luminescence-stable lanthanide materials in a facile manner has always been an intriguing challenge. Herein we report an easy approach to the preparation of a heat-set lanthanide-based metallogel (H6L/Tb gel) with stable luminescence from 5,5′,5′′-(1,3,5-triazine-2,4,6-triyl)tris(azanediyl) triisophthalate (H6L) as a Tb3+ coordinating ligand. The heat-set H6L/Tb gel exhibits luminescence that mostly retains its intensity in the 0–90 °C temperature range and under mechanical stimulus. In addition, the H6L/Tb xerogel is also luminescent in aqueous solution. UV-vis and FT-IR spectroscopy and XRD studies reveal that the stable luminescence of the H6L/Tb gel depends on heat-set-induced strong hydrogen bonding, π–π stacking, and metal–ligand interactions. This study provides a heat-set approach to the preparation of luminescence-stable metallogel materials, such metallogels are potentially useful in anti-counterfeiting and sensing fields, among others.
研究领域:
材料科学
·
化学
·
光学
·
纳米技术
✓ 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）