DYES AND PIGMENTS
·
2026
·
IF 3.9
Lin-Xia Lu,Xue-Qing Li,Chuan-Xiang Qin,Xian-Wei Cheng,Jin-Ping Guan
A spiropyran-AIEgen integration strategy is proposed to construct multicolor photochromic systems beyond conventional single-color switching. • Electrospinning-enabled polymer encapsulation markedly enhances the stability of spiropyran, yielding high-performance solid-state photochromic nanofibers. • The resulting materials enable multilevel color encryption, offering strong potential for advanced anti-counterfeiting applications. Photochromism has emerged as a promising strategy for enhancing anti-counterfeiting technologies, where the development of materials combining rapid response with high stability remains a critical challenge. Herein, a novel spiropyran-tetraphenylethylene (SP-TPE) photochromic material was designed and successfully synthesized. The material exhibited rapid and reversible photochromic behavior in solution, accompanied by pronounced aggregation-induced luminescence. Owing to this synergistic effect, SP-TPE displayed distinct multicolor photoresponses rather than a conventional single-color transition, significantly expanding the accessible photochromic color space. Cytotoxicity evaluations confirmed its low toxicity and good biocompatibility. To overcome the limited stability of SP-TPE in solution, polymer encapsulation via electrospinning was employed to fabricate nanofibrous films with spatial confinement. The resulting SP-TPE films retained pronounced photochromic performance even at low concentrations and low light intensities, while exhibiting markedly enhanced thermal stability. Under identical conditions, the color recovery time was extended from approximately 30 s in solution to over 800 s in the solid state. Moreover, concentration- and light-intensity-dependent color modulation enabled multilevel color encryption. This work provides an effective strategy for constructing stable, multicolor photochromic systems and offers new insights into the development of advanced spiropyran-based anti-counterfeiting materials. Download: Download high-res image (312KB) Download: Download full-size image
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lin Wang,Wencheng Zhong,Wenxing Gao,Wenfeng Liu,Li Shang
Multicolor luminescent materials with time-dependent optical responses are attractive for developing advanced anti-counterfeiting techniques, but it still remains challenging to rationally design and fabricate these emerging materials. Herein, we report the design of novel dynamic luminescent materials based on spiropyran-engineered gold nanoclusters (AuNCs) for anti-counterfeiting applications. Encapsulating fluorescent AuNCs with spiropyran-labeled bovine serum albumin enables the construction of dynamic multicolor luminescent nanoparticles (DML NPs) based on fluorescence resonance energy transfer. These AuNCs-based DML NPs exhibit photochromism and dynamic fluorescence color change from green to yellow to orange-red with the extension of UV irradiation time. Moreover, the photochromism and dynamic fluorescent behavior is highly reversible when exposed to the irradiation of visible light. By taking advantage of photochromic and time-dependent dynamic fluorescence, potential application in optical information storage, dynamic anti-counterfeiting authentication and multi-mode anti-counterfeiting are successfully demonstrated based on DML NPs-deposited polyvinyl alcohol film. This study provides a new strategy of designing novel dynamic multicolor luminescent materials with promising optical properties, which can further advance the practical application of AuNCs-based luminescent materials in the field of information encryption and anti-counterfeiting.
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POLYMER
·
2022
·
IF 4.432
Congcong Cui,Guojie Liu,He Gao,Min Wang,Jun Gao
A photo and thermal-responsive smart polymer, enabling controllable wettability according to different temperature and light conditions, was developed in this paper. The 3-(3′,3′-dimethyl-6-nitrospiro-[chromene-2,2′-indolin]-1′-yl) propyl methacrylate (SPMA) and N -isopropylacrylamide (NIPAAm) by 2,2′-azobis(isobutyronitrile) (AIBN) were grafted on the surface of polydimethylsiloxane (PDMS) to induce free radical polymerization . The SPMA isomerizes from a colorless, hydrophobic spiropyran (SP) form to a deep purple, hydrophilic merocyanine form (MCMA) upon UV-light. The wettability of poly( N -isopropylacrylamide) (PNIPAAm) is sensitive to temperature, showing hydrophobicity above the low critical solution temperature (LCST) and hydrophilicity below LCST. Furthermore, the addition of SPMA has realized the significant reversible wettability synergistic with PNIPAAm. The reversible wettability can be controlled by selectively applying single or both factors of light and temperature. Thus, practical application of the above controllable wettability can be greatly expanded. When the polymer is transferred from 40 °C (>LCST)-visible light to 10 °C (
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LANGMUIR
·
2018
·
IF 3.789
Yan Yang,Ting Zhang,Jiajin Yan,Liuwa Fu,Hongping Xiang,Yanyan Cui,Jiahui Su,Xiaoxuan Liu
In this study, spiropyran (SP)-containing fluorinated polyacrylate (F-PA–SP) latex was prepared by emulsion polymerization using fluorinated and SP-based acrylic monomers as raw materials. Fourier transform infrared and 1H NMR demonstrate that the F-PA–SP copolymer has been successfully synthesized, and dynamic light scattering and transmission electron microscopy analyses indicate that the synthesized latex has presented a uniform particle size of approximately 200 nm. X-ray photoelectron spectroscopy, atomic force microscopy, and water contact angle (WCA) analyses were used to investigate the surface properties of the F-PA–SP coating and demonstrate that its hydrophobicity is enhanced by the addition of a fluorinated acrylic monomer. The photochromic properties of the coating were investigated by UV/vis spectroscopy, and the results reveal that the F-PA–SP coating possesses better photoresponsiveness, fatigue resistance, and photoreversibility under UV/vis irradiation than the coating prepared using fluorinated polyacrylate/SP blended latex. Moreover, the WCA of the F-PA–SP coating subjected to UV/vis irradiation shows minimal changes and retains its excellent hydrophobicity. Finally, the F-PA–SP latex was applied to cellulosic paper, and the resulting photochromic paper exhibits outstanding reversible color changes and hydrophobicity.
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高影响因子
LANGMUIR
·
2021
·
IF 3.882
Qian Wang,Zhen Wu,Penghua Qin,Jing Ji,Liming Lai,Meizhen Yin
Regulation of self-assembly morphology is an effective strategy to obtain advanced functional materials with expected properties. However, achieving remarkable morphological transformation by light irradiation is still a challenge. Herein, three simple spiropyran derivatives (SP1, SP2, and SP3) are constructed, achieving different degrees of morphological transformation from nanospheres to hollow tadpole-like structures (SP3), tubular structures (SP2), and microsheets (SP1) after ultraviolet light irradiation. Interestingly, the hollow tadpole-like structures (SP3) can further extend to Y-shaped or T-shaped tubular morphology. In the process, SP1, SP2, and SP3 can be isomerized from a closed-ring form (hydrophobicity) to an open-ring form (hydrophilicity) in different degrees, interacting differently with methanol solvent molecules. The formation of hollow structures or microsheets along with the isomerization of spiropyran derivatives contributes to the adjustment of the hydrophilicity of the interface. Therefore, SP1, SP2, and SP3 with photoregulated morphological transformation show promising applications in tunable interface materials.
研究领域:
材料科学
·
化学
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高影响因子
RSC Advances
·
2020
·Vol. 10
·期 45
·26664-26670
·
IF 3.119
Jian Su,Yiwei Li,Wen Gu,Xin Liu
Histidinemia is a congenital metabolic disorder where the histidine (His) metabolism is blocked, resulting in increased concentrations of His in blood and urine. The disease causes an abnormal development of the patient's nervous system, which leads to many serious illnesses. Therefore, it is very important to diagnose early. In this study, we developed a novel fluorescent nanosensor NaGdF4:Yb3+, Er3+@SiO2–spiropyran (UCNP@SiO2–SP). The nanosensor displayed a “turn-off” fluorescence response towards His. When His was mixed with UCNP@SiO2–SP, His could specifically bind to SP, which could cause the isomerization of SP. The structure of SP was changed from spiroform into merocyanine form. The luminescence of the sensor was overlapped with the absorption of the merocyanine form. As a result, His will lead to fluorescence quenching of the sensor based on inner filter effects (IFE), which can be used to detect His. Importantly, as the first report of a UCNP@SiO2–SP nanosensor for detecting His, this method exhibits good selectivity and anti-interference capability. The detection limit is 4.4 μM. In addition, the amount of His in urine was also measured, suggesting the applicability of this sensor for histidinemia diagnosis.
研究领域:
医学诊断
·
生物化学
·
纳米技术
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高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Ziyi Bai,Lei Guo,Di Zhao,Yige Wang
Photoluminescent materials are widely used for information storage and anticounterfeiting, while most of them have the disadvantages of static information performance and weak processability, which is still a challenging task in developing dynamic anticounterfeiting materials with high security levels. Herein, we fabricated a novel photostimuli-responsive dual-emitting luminescent material UPTES-SPn-Tb-hfa, which was obtained by introducing the photochromic molecule spiropyran (SP) and lanthanide complex (Tb-hfa) into a siloxane-polyether matrix using the sol–gel process. Due to the conformation-dependent photochromic fluorescence resonance energy transfer between the Tb-hfa donor and SP acceptor, the ring-closing (SP)/ring-opening (MC) isomerization of the SP unit leads to a reversible luminescence switching in UPTES-SPn-Tb-hfa. This composite material has great potential for advanced anticounterfeiting because of the advantage of rapidly repeatable encryption/decryption for at least 8 times and dynamic luminescent colors within 15 s. In addition, due to its two luminescent centers (Tb3+ and MC), the luminescent color of this material can be regulated by 254 and 365 nm UV-light irradiation, which facilitates the design of multicolored anticounterfeiting labels. Our work presents a novel design methodology to fabricate dynamic anticounterfeiting materials, significantly enhancing the security of anticounterfeiting applications.
研究领域:
材料科学
·
光学
·
化学
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高影响因子
JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 5
·1-14
·
IF 2.8
Xu Zijie,Liu Xingyao,Yu Chongwen,Fan Xinyu,Yan Zhongwei,Xiao Haotian,Song Yujie,Xu Jian
Despite being a widely used polymer material, studies on the spiropyran (SP)-derived photochromic functionalization of amine-cured epoxy resin materials are not sufficiently detailed. Traditional amine-based curing agents can undergo chromogenic reactions with SP through multiple reaction mechanisms. Furthermore, the dense crosslinked network structure of the resin restricts the conformational isomerization of SP, thereby leading to the failure of photochromic functionalization in epoxy resin systems. In this work, a SP derivative (YBSP), which contains a meta-dinitrobenzene structure, was synthesized and doped into polyetheramine-cured epoxy resin materials. Polyetheramine does not react with SP to form small molecular fragments, and the bulky side group of YBSP provides sufficient free volume for its isomerization in the resin crosslinking structure. As a result, the resin material doped with YBSP exhibits photochromic properties after exposure to 365 nm UV light, and as the YBSP content increases, the fracture toughness of the resin is enhanced, with its fracture strength reaching 72.815 MPa. In conclusion, doping YBSP into epoxy resin not only imparts photochromic functionality to the material but also enhances its toughness while maintaining its original thermodynamic properties.
研究领域:
材料科学
·
化学工程
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Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 39
·9525-9531
·
IF 7
Jie Li,Zhuang Ma,Anran Li,Siyuan Huang,Yufei Zhang,Yun Xue,Xianhui Song,Ye Zhang,Shihao Hong,Mo Wang,Zhongming Wu,Xinge Zhang
Microorganism adhesion and the resulting contamination of the biomaterial is one of the major causes of biomedical device failure. Stimuli-responsive materials based on dynamically regulating interactions with reversible characteristics of on–off states have attracted increasing attention. Here, a facile self-assembled biomaterial nanocoating constructed using acidity- and photoregulated spiropyran-modified nanoparticles was developed for reversibly regulating bacteria or mammalian cell adhesion-and-detachment. The coating was formed by coating a solution of spiropyran-conjugated nanoparticles around the surface of a silica gel followed by curing and drying at 60 °C for 30 min. Importantly, efficient adhesion-and-detachment of bacteria or cells could be controlled even after 8 cycles owing to the excellent acidity- and light-switched ability. Collectively, this well-defined self-assembled nanocoating as a dynamical and reversible agent provides promising insight for the development of biomedical devices, especially for biomaterial medical coatings.
研究领域:
生物材料学
·
表面工程
·
微生物学
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再生医学
·
抗菌技术
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DYES AND PIGMENTS
·
2021
·
IF 4.889
Yan Gao,Qing Yin,Xiaoye Geng,Xingxiang Zhang,Wei Li,Y. Gao,X. Geng,X. Zhang,W. Li
Spiropyran (SP) materials have attracted considerable interest owing to sensitive and efficient photochromic properties, but it is a challenge to obtain photochromic materials with excellent sensitive UV-responsivity and photodegradation resistance durability. In this study, a series of comb-like acrylate polymer nanoparticle latexes containing SP are fabricated via miniemulsion polymerization. The influence of the length of the alkyl side chain of comb-like acrylate polymer on some photochromic properties of SP is investigated. Compared with the short-side chain poly(butyl acrylate) (PBA) nanoparticles latexes, the comb-like acrylate polymer nanoparticle latexes with longer side chain possess better photoresponsivity and more excellent photodegradation resistance because the strong interaction and chain flexibility of comb-like alkyl side chain provide effective spaces for the SP→MC or MC→SP photochemical isomerization . The investigations of photochromic nanoparticle latexes guide an approach to reversible optical data storage, multipurpose photo-responsive sensing system and show promising application in the field of ultraviolet intensity indicator and flexible wearable UV protective clothing.
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JOURNAL OF RHEOLOGY
·
2017
·Vol. 61
·期 1
·107-116
·
IF 3.136
Dong Renfeng,Peng Jun,Chang Xueyi,Zhang Qilu,Hong Liangzhi,Ren Biye
Hydrophobically modified ethoxylated urethanes (HEURs) have been widely used as effective thickeners for improving the solution rheological properties in a variety of applications for over 40 years. We designed and prepared a novel photosensitive spiropyran-functionalized HEUR polymer ( SP-HEUR ), which was used to investigate the influence of hydrophobicity change of hydrophobes induced by photoisomerization of spiropyran (SP) group on the solution aggregation and rheological properties. The concentrated SP-HEUR solutions show an interesting photoresponsive rheological behavior upon alternative exposure to ultraviolet and visible light due to a reversible SP- to merocyanine-form conversion and back. A reversible rearrangement of micellar junctions through loop-bridge or bridge-loop transitions is proposed to interpret the influence of photoisomerozation of spiropyran groups on the associative structure and rheological properties of the polymer solution. This work will not only provide new insights into the influence of hydrophobicity change of hydrophobes on the associative structure and rheological properties of HEUR solutions but also opens a new perspective for the development of some special applications of HEURs in the manufacturing and transmission of soft materials, waterborne coating, inks, medicines, cosmetics, and so on.
研究领域:
材料科学
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化学工程
·
软物质物理
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Polymers
·
2021
·Vol. 13
·期 15
·2496
·
IF 4.329
Shiyou Tian,Jicong Zhang,Qiong Zhou,Limei Shi,Wenwen Wang,Dong Wang
We report photochromic polyamide 6 (PA6) which was synthesized by hydrolyzed ring-opening polymerization of ε-caprolactam with spiropyran (SP) embedded in the polymer chains. It indicated that crystallinity degree of the resulting copolymers was decreased since only PA6 segments can crystallize with increasing content of SP modifier. Meanwhile, toughness of photochromic PA6 was decreased. The photochromic property analysis indicated that the sample with more flexibility and more content of SP was more sensitive to UV light at the beginning of irradiation than other samples and its color after being irradiated for 1 min tended to reddish. Investigation revealed that the UV-vis absorbance of SP-PA6-3 had negligible decay after 10 cycles, which indicated SP-modified PA6 possessed excellent photoresponse reversibility and fatigue resistance.Keywords:photochromic;polyamide 6;spiropyran;structure and properties
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