MACROMOLECULAR RAPID COMMUNICATIONS
·
2014
·Vol. 35
·期 7
·741-746
·
IF 4.608
Shijun Long,Shuguang Bi,Yonggui Liao,Zhigang Xue,Xiaolin Xie
To achieve a fast photochromic response in solid matrix, photochromic molecules/segments have been either dispersed into elastomers via physical doping or linked to glassy polymers by soft units through covalent bonding. However, the former is lack of high mechanical strength and the latter owes the drawback of time-consumption of synthesis. Here, we propose a facile strategy of co-solvent evaporation to prepare polymer-dispersed photochromic organogel where both high mechanical strength of the glassy polymer matrix and solution-like fast photochromism of the photochromic molecule within organogel can be retained concurrently. Glassy PVA matrix and dispersed organogel of 1,3:2,4-di- O -benzylidene- d -sorbitol/poly(propylene glycol) (DBS/PPG) provide high mechanical strength and sufficient free volume for intramolecular rotation of photochromic spiropyran (SP), respectively. Interestingly, these thin films behave a solution-like decoloration the decay rate of which is 65–70 fold faster than that in the SP-directly doped PVA film and only slightly slower than those in their corresponding PPG solutions.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 24
·15405-15410
·
IF 3.269
Saiqi Tian,Haojun Fan,Yi Chen,Jun Yan,Jiakuan Sun,Dianbin Qin
A photochromic long persistent luminescent polyurethane (PLPLPU) is prepared via incorporating amino-functionalized phosphors (NH2-SrAl2O4:Eu2+,Dy3+) and the red fluorescer 1-[(2-hydrocyethly)amino]anthraquinone (HAA) based on a colour conversion process. X-ray Diffraction (XRD), UV-vis absorption spectroscopy (UV), thermogravimetric analysis (TG), a fluorescence spectrophotometer and an afterglow brightness tester as well as the percentage of the migration test were utilized to characterize the structure and properties of the resultant samples. The photoluminescence emission spectrum of phosphors is overlapped with the excitation spectrum of HAA, which demonstrates that HAA can be selected as a colour conversion agent and can be excited by phosphors in the dark. PLPLPU shows red emission in daylight and yellow in the dark, exhibiting a pleasant photochromic long persistent luminescence effect. Furthermore, HAA in PLPLPU was confirmed to have a better thermal migration stability than the blend samples due to the chemical combination.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
TEXTILE RESEARCH JOURNAL
·
2022
·
IF 2.455
Lan Zhang,Jia-guang Meng,Ya-ming Liu,Yong-zhen Wang,Zhao-ling Sun,Ling-jie Yu,Xing-yun Gao,Chao Zhi
Spiropyran and spiroxazine photochromics have attracted increasing attention in optical data storage, optical switches, and anti-counterfeiting for decades. To expand the applications of spiropyran and spiroxazine, the durability and multi-color changes of spiropyran and spiroxazine still need to be explored. In this article, based on the subtractive principle of dyes, multi-color spiropyran and spiroxazine microcapsules with uniform particle sizes were prepared by the interfacial polymerization method via using compounds (spiropyran and spiroxazine) of different colors as the core material, and polyurethane as the shell material. Among them, toluene diisocyanate and polyethylene glycol constitute the hard and soft segments of polyurethane, respectively. The color of spiropyran and spiroxazine microcapsules can effectively switch between color and colorless, showing excellent photo fatigue resistance. The average particle size of microcapsules is 2.951 µm, and the particle distribution index value is 0.314, which shows the particle size is small and uniform. The maximum thermal decomposition temperature is 426°C, demonstrating good thermal stability. The hydrophobic photochromic fabric was prepared by coating multi-color spiropyran and spiroxazine microcapsules on cotton knitted fabric and hydrophobic treatment. The hydrophobic photochromic fabric is hydrophobic and stain resistant, and exhibits multi-color dynamic switching and long-lasting use. After 50 cycles of washing, the water contact angle of the fabric remains about 109°, showing its good washing resistance and water repellency. In addition, spiropyran and spiroxazine microcapsules are also applied in template and screen printing to impart rich and dynamic color-changing effects to fabrics, fabricating photochromic fabrics. Photochromic fabrics have potential applications in civilian and military fields.
研究领域:
材料科学
·
纺织工程
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Pengyu Li,Qiannan Jia,Pei Han,Chunxiao Lu,Peng Li,Yong Li,Qiwei Zhang,Xihong Hao
Photon-mode ultracapacity storage media made of inorganic photochromic luminescent materials are highly anticipated, and widely explored in the development of new optical data storage (ODS) technologies. Despite some recent breakthroughs, the optical storage capacity of defect-rich photochromics is still limited to low luminescent readout abilities. Herein, oxygen vacancy rich and bismuth doped K 0.5 Na 0.5 NbO 3 :Eu 3+ ceramics were designed, and synergistically boost the luminescence intensity, photochromic efficiency, and luminescent modulation properties, then effectively improving the luminescence readout abilities. The luminescence modulation ratio reaches up to 97.5% from 68.4% with the increase of oxygen vacancy concentrations due to hetero-valent bismuth doping, accompanied by high photochromic efficiency (35.7% from 21.9%) and excellent reproducibility. These results demonstrate that the synergistic engineering of oxygen vacancy and doping is a promising strategy for obtaining high-performance photochromic materials.
研究领域:
材料科学
·
光学存储技术
✓ 已验证
DOI
高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-8
·
IF 14.919
Lu Huangjie,Xie Jian,Wang Xin-Yu,Wang Yaxing,Li Zi-Jian,Diefenbach Kariem,Pan Qing-Jiang,Qian Yuan,Wang Jian-Qiang,Wang Shuao,Lin Jian
Radiation dosimeters displaying conspicuous response of irradiance are highly desirable, owing to the growing demand of monitoring high-energy radiation and environmental exposure. Herein, we present a case of dosimetry based on a discrete nanocluster, [Th 6 (OH) 4 (O) 4 (H 2 O) 6 ](TPC) 8 (HCOO) 4 ∙4DMF∙H 2 O (Th-SINAP-100), by judiciously incorporating heavy Th 6 polynuclear centers as radiation attenuator and organic linkers as photo-responsive sensor. Interestingly, dual-module photochromic transitions upon multiple external stimuli including UV, β-ray, and γ-ray are integrated into this single material. The striking color change, and more significantly, the visible color transition of luminescence in response to accumulating radiation dose allow an on-site quantitative platform for naked-eye detection of ionization radiations over a broad range (1–80 kGy). Single crystal X-ray diffraction and density functional theory calculations reveal that the dual-module photochromism can be attributed to the π(TPC) → π*(TPC) intermolecular charge transfer driven by enhanced π-π stacking interaction between the adjacent TPC moieties upon irradiation.
研究领域:
材料科学
·
放射医学
✓ 已验证
DOI
高影响因子
Materials Chemistry Frontiers
·
2022
·Vol. 6
·期 5
·623-632
·
IF 8.683
Guofeng Zhang,Linqi Huang,Fuchao Yang
Photochromic materials with anti-water properties have impressive practical value, but their applications are severely hindered by their poor stability and slow colour-switching rate. Inspired by the superhydrophobicity of lotus leaves and the photochromic features of chameleons, herein we innovatively report a multifunctional material with stable superhydrophobicity and rapid photochromism. Initially, the extracted cellulose nanocrystals were utilized as the skeleton. After loading tungsten trioxide (TT) and Ketjen black (KB) on cellulose nanocrystals, the hybrid color-changing TT based sheet and composite conductive KB based sheet were constructed. Next, the TT sheet (upper layer and lower layer) and KB sheet (middle layer) were bonded with sodium carboxymethyl cellulose to prepare a sandwich-like laminated structure (denoted as TKT). Subsequently, TKT was modified by polydimethylsiloxane (PDMS) to prepare multifunctional PDMS@TKT. The PDMS ingredient can not only be used as an electron donor to increase the rate of discoloration but also endow PDMS@TKT with excellent waterproof performance. The superhydrophobicity of PDMS@TKT can withstand finger rubbing, temperature changes, acid–base corrosion, and UV radiation. PDMS@TKT can change its colour after 60 s of ultraviolet irradiation and then restore its original color after heating for 5 min, showing fast and highly reversible switching. Thus, PDMS@TKT has great potential for application in the fields of waterproof posters, light-driven sensors, and anti-counterfeiting security.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Tingting Fan,Zhijian Li,Gang Liu,Congbin Fan,Shouzhi Pu
A new photochromic metal-organic framework [ Zn(BCM) 2 (bpfb)] where H 2 BCM = 1,2-bis(5-carboxylic acid-2-methylthien-3-yl)hexafluorocyclopentene, bpfb = N, N -bis-(4-pyridylformamide)-1,4-benzenediamine, was synthesized and characterized by Single Crystal X-ray Diffraction, Powder X-ray Diffraction, Elemental Analysis , Fourier Transform Infrared Spectroscopy (FT-IR) and Thermogravimetric Analysis (TGA). [Zn(BCM) 2 (bpfb)] crystallizes in a monoclinic P2 1 /n space group. The Single crystal X-ray structure determination revealed a three dimensional (3D) coordination framework of dinuclear zinc clusters [Zn 2 (COO) 4 N 2 ] interconnected both BCM 2− and bpfb. And [Zn(BCM) 2 (bpfb)] exhibited reversible photochromism behavior derived from diarylethene BCM 2− ligand. Besides, [Zn(BCM) 2 (bpfb)] can be further used to photo-switch the luminescence emission, which can achieve precisely reading out and concealing information in reversible transformation.
研究领域:
材料化学
·
光学材料
·
晶体学
✓ 已验证
DOI
高影响因子
Cell Reports Physical Science
·
2023
·
IF 8.9
Huangjie Lu,Zhaofa Zheng,Jie Qiu,Yu-Chang Hou,Huiliang Hou,Ting Wen,Xiaofeng Guo,Qing-Jiang Pan,Yonggang Wang,Jian-Qiang Wang,Jian Lin
Developing photochromic materials and acquiring fundamental knowledge of their underlying photophysics is significant in diverse fields, including optoelectronics, sensing, catalysis, data storage, and more. Herein, we demonstrate how the photochromism of coordination polymers can be realized by creating lanthanide contraction, whose role in directing photophysics has previously remained elusive. Integrating different lanthanide cations and a π-electron conjugated terpyridine-based ligand (tpbz – ) affords nine isomorphous one-dimensional lanthanide coordination polymers of the formula Ln(tpbz) 3 (where the lanthanide [Ln] ranges from europium to lutetium). The decreasing ionic radii of the Ln centers across the 4f block result in increasingly condensed packing of the metal-ligand assembly. This trend affords a spectrally selective photochromic response in the lutetium polymer Lu(tpbz) 3 , contrasting sharply with the nonphotochromic earlier analogs. Experimental and theoretical investigations reveal that the chromism can be attributed to the progressively enhanced intermolecular charge transfer of adjacent tpbz – moieties induced by either Ln contraction or external pressure.
研究领域:
材料科学
·
光物理学
·
化学
✓ 已验证
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Jingjing Ren,Li An,Siqiao Zhang,Ran Mo,Fanghua Pan,Yuwei Hao,Zhiqing Xin,Zhicheng Sun
A novel type of photochromic thermally expandable microcapsules (PTEMs) were prepared through suspension polymerization. The shell material of the microcapsules consisted of acrylonitrile (AN), methyl methacrylate (MMA), and methyl acrylate (MA). The core material utilized n-hexane as a foaming agent containing photochromic dye (spiropyran). On the basis of the preparation, the investigation further focused on the chemical structure, surface morphology, particle size, color-changing ability, and thermal expansion of the microcapsules. Additionally, the PTEMs were used in water-based inks with good compatibility and for screen printing to obtain patterns. Meanwhile, the color changeability of the printed samples was evaluated using a portable colorimeter. Eventually, the results demonstrated that the printed products exhibited excellent color change and thermal expansion capabilities. In future, the PTEMs will have the potential to develop water-based ink applications in anti-counterfeiting and smart packaging.
研究领域:
材料科学
·
化学工程
·
印刷技术
✓ 已验证
产品关联
DOI
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
✓ 已验证
产品关联
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2024
·
IF 3.2
Xuyi Li,Chen Huang,Rui Xue,Jia-Ping Tong,Yuehan Cheng,Bao-Li An,Jiaqiang Xu,Yue-Ling Bai
Viologen has attracted much attention due to its sensitive chromic properties in response to external stimuli, especially its photochromic behavior. Herein, a viologen derivative, 4PV·2Br, was prepared based on our previous studies, which exhibited strong photoluminescence due to the introduction of the thiazolothiazole group but was silent to light, even under 300 W UV light irradiation. By anion exchange with tetraphenylborate, a new viologen derivative, 4PV·2B(Ph)4, was obtained, which not only exhibits strong fluorescence with a quantum yield of 69% and a lifetime of 1.93 ns in solution but also exhibits sensitive photochromism to UV light, even under sunlight within 5 s. It is very sensitive to light and may become a potential excellent solar chromic material. It should be emphasized that the colored 4PV·2B(Ph)4 radical is particularly stable and can maintain its coloring state in air for a long time, while vinegar vapor can cause it to fade in 2 s, giving it good color reversibility. The single-crystal structure before and after UV light excitation shows that UV light shortens the π···π distances between B(Ph)4 anions and 4PV cations, which is beneficial to faster electron transfer between them and the formation of stable viologen radicals. Sensitive photochromism accompanied by strong photoluminescence may endow 4PV·2B(Ph)4 with potential application in information security and provide a good strategy to regulate the functionality of materials by regulating the counteranions of new viologen derivatives.
研究领域:
材料化学
·
光化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jiaxin Zhang,Mengxia Lu,Xin Cai,Peter Müller-Buschbaum,Qi Zhong
A wearable detector to monitor visible light intensity is realized by the restrained photochromism of a hydrogel composite containing light-responsive spiropyran with hydroxyl groups (SPOH). When exposed to visible light, the SPOH experiences a ring-opening to a ring-closed transition accompanied by discoloration from red to yellow. Unlike in the solution, the photochromism/discoloration rate is strongly correlated to the cross-linking points. By reducing the amount of cross-linker from 40 to 5 mg, the photochromism rate of SPOH is 300% faster. Inspired by the Chinese Jade Loong from Hongshan, the hydrogel composite is shaped into a Loong to monitor the light intensity. By increasing the amount of cross-linker in the head, body, and tail, the photochromism/discoloration rate sequentially turns slower from one region to the other. Higher light intensity is required to realize the discoloration in the hydrogel composite containing a larger amount of the cross-linker. Because the initial colors are identical, the light intensity can be easily traced by checking the discoloration of these pieces containing different amounts of cross-linker. Based on this unique and reversible photochromic capability, the present hydrogel composite can be used for monitoring the visible light intensity to prevent myopia, especially for children and students.
研究领域:
材料科学
·
生物医学工程
·
光学
✓ 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）