DYES AND PIGMENTS
·
2016
·
IF 4.055
Huan Dong,Miao Luo,Sheng Wang,Xiang Ma
A series of new diarylethene compounds with both photochromism and aggregation-induced emission have been synthesized by connecting tetraphenylethene and triphenylethene to the bisthienylethene. All the four compounds exhibit good photochromism upon irradiation with alternative UV and visible light. And they are all provided with aggregation-induced emission properties in tetrahydrofuran solution with different fraction of water, non-emissive in the pure tetrahydrofuran solution but yellowish green fluorescence in the aggregate or solid state. Furthermore, the compounds connecting tetraphenylethene to the bisthienylethene were found to exhibit the stronger fluorescence emission in the aggregate or solid state than the ones connecting triphenylethene to the bisthienylethene.
研究领域:
有机化学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Mengmeng Qin,Yuxiao Xu,H. Gao,Guoying Han,Rong Cao,Peili Guo,Wei Feng,Li Chen
Aggregation-induced emission (AIE) materials present unique solid-state fluorescence. However, there remains a challenge in the switching of fluorescence quenching/emitting of AIE materials, limiting the application in information encryption. Herein, we report a composite of tetraphenylethylene@graphene oxide (TPE@GO) with switchable microstructure and fluorescence. We choose GO as a fluorescence quencher to control the fluorescence of TPE by controlling the aggregation structure. First, TPE coating with an average thickness of about 31 nm was deposited at the GO layer surface, which is the critical thickness at which the fluorescence can be largely quenched because of the fluorescence resonance energy transfer. After spraying a mixed solvent (good and poor solvents of TPE) on TPE@GO, a blue fluorescence of TPE was emitted during the drying process. During the treatment of mixed solvents, the planar TPE coating was dissolved in THF first and then the TPE molecules aggregated into nanoparticles (an average diameter of 65 nm) in H2O during the volatilization of THF. We found that the fluorescence switching of the composite is closely related to the microstructural change of TPE between planar and granular structures, which can make the upper TPE molecules in and out of the effective quenching region of GO. This composite, along with the treatment method, was used as an invisible ink in repeated information encryption and decryption. Our work not only provides a simple strategy to switch the fluorescence of solid-state fluorescent materials but also demonstrates the potential for obtaining diverse material structures through compound solvent treatment.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Qiu Zhuang,Ruru Gao,Mingyang Shi,Xiangpeng Lin,Aming Xie,Wei Dong
Heterogeneous catalysts with tunable micropores and confined metal sites in micropores are of great significance in size-selective catalysis but remain difficult to be achieved in organic polymers. In this work, we provide a micropore-confining strategy for the design of size-selective heterogeneous catalysts and investigate their size selectivity on various catalytic reactions. The palladium (Pd)@microporous tetrastyrene polymer (MTP) was synthesized via a Pd-catalyzed coupling reaction, where superfine Pd nanoparticles in situ form in the micropores of MTP. The results demonstrate that Pd@MTP catalysts not only exhibit greatly enhanced catalytic activity but also present excellent size selectivity on various catalytic systems. This research greatly expands the application scope of microporous organic polymers in size-selective heterogeneous catalysis.
研究领域:
化学工程
·
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 35
·19701-19706
·
IF 2.936
Zhixiang Lu,Yunming Liu,Shuhan Lu,Yuan Li,Xiaolan Liu,Yu Qin,Liyan Zheng
The detection of Ag+ in the environment is very important to determine the level of pollution from silver complexes, which have caused various human health problems. Herein, an aggregation-induced emission (AIE) chromophore (tetraphenylethane, TPE) attached to a benzimidazole group (tetra-benzimidazole, TBI–TPE) is synthesized and utilized to detect Ag+ in the environment. The strong chelating effect between the benzimidazole group and Ag+ leads to the formation of aggregates, and strong yellow fluorescence signals were observed after adding Ag+ into a TBI–TPE solution. The stoichiometry of the complex of TBI–TPE and Ag+ was established to be 1 : 2 using photochemical and mass spectra measurements. The detection limit of the Ag+ assay is 90 nM with a linear range from 100 nM to 6 μM. This study provides a facile method to determine Ag+ in real environmental samples with satisfactory results.
研究领域:
环境科学
·
分析化学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Molecular and Engineering Materials
·
2013
·
IF 0
MIAO LUO,XIE ZHOU,ZHENGUO CHI,CHUNPING MA,YI ZHANG,SIWEI LIU,JIARUI XU
Two novel organogelators ( TEG and TAG ) based on tetraphenylethylene and 3,4,5-tris(dodecyloxy) benzoic acid were synthesized through ester bond and amido bond linkages, respectively. Compounds TEG and TAG were able to induce gelation in ethanol. Aggregation-induced enhanced emission was observed in these organogelator molecules, with increased fluorescence intensity from the solutions to the gels. The completely thermoreversible gelation occurred due to the aggregation of the organogelators. In the process, a fibrous network was formed by a combination of intermolecular hydrogen bonding, π–π stacking and van der Waals interactions. These phenomena were observed in the xerogels by field-emission scanning electron microscopy and Fourier-transform infrared spectroscopy. The results of differential scanning calorimetry and polarized optical microscopy indicated that compound TAG exhibited stable liquid crystalline phases over a wide temperature range. The linking groups have severe influence on the properties of the organogelators, which was mainly attributed to the hydrogen bonding interaction in compound TAG .
研究领域:
材料化学
·
有机化学
✓ 已验证
产品关联
DOI
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Ya Li,Chao-Yu Wang,Dong-Jin Qian
Molecular arrangement and orientation of tetraphenylethylene (TPE) unit in the highly ordered thin films and aggregates can effectively limit its conformation that results in strong effect on the excited energy transfer process and luminescent behaviors under irradiation. We report here an interfacial self-assembly of metal-TPE coordination polymer (CP) ultrathin films and their aggregate-induced emission (AIE) behaviors. After connected with pyridyl or benzimidazole substituents, the tetradentate TPEs as synthesized are used as the multidentate linkers to coordinate with the Cd 2+ ions to produce aggregates in the solutions, and to form well-defined two- and three-dimensional organized Cd-TPE CP multilayers at the air-water interfaces by the Langmuir-Blodgett (LB) method. It is revealed that, in addition to the aggregation-induced emission, the following external factors have also large effects on the luminescence of TPEs , including the coordination bonding in the CPs, in plane and interlayer molecular interaction in the LB films ; both of them can restrict the intramolecular motion or rotation of TPE unit. Because of these external effects, the emission lifetime of TPEs reaches to approximately 5–10 times longer in some Cd-TPE CP LB films than that in the solutions. Further, the luminescent emission wavelengths and colors of LB films can be tuned to some extent by the in-plane and interlayer molecular interaction. Finally, it is demonstrated that the luminescent emissions and colors of the Cd-TPPE CP LB films is selectively sensing to methanol and formic acid in the gas phase with good reversibility and reproductivity.
研究领域:
材料化学
·
光物理学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2025
·
IF 2.9
Chenxi Zhang,Chenlu He
A tetraphenylethylene (TPE)-functionalized diacetylene monomer undergoes direct violet-phase polydiacetylene (PDA) under 254 nm UV, bypassing conventional blue-phase formation. Steric constraints from the bulky TPE units force backbone distortion. The resulting polydiacetylene exhibits reversible violet-to-red thermochromism at 69°C with reversible thermochromism.
研究领域:
材料科学
·
高分子化学
·
光化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Hongyu Guo,Linfang Liang,Jiayi Guo,Liangbin Lin,Fafu Yang
The metal-coordination self-assemble system played an important role on constructing novel supramolecular smart-response materials. Although the single and double-response materials based on metal-induced self-assembly had been studied extensively, the triple responses for this kind of supramolecular material was seldom reported. In this work, the first metal-induced self-assemble system with triple responses on photophysical, liquid crystalline and gel properties was presented based on Hg 2+ -coordination tetraphenylene dimer ( Bis-TPE ). Bis-TPE was prepared by bridging two alkyl-substituted tetraphenylene with amido chain. It possessed the fluorescence response from the strong emission for Bis-TPE to the faint emission for Bis-TPE -Hg 2+ complex. The self-assemble mechanism of Bis-TPE -Hg 2+ was clarified as that Hg 2+ was located in the cavity of the amido-ether chain of Bis-TPE . The Hg 2+ -induced mesomorphic transition was also observed from smectic mesophase for Bis-TPE to hexagonal columnar mesophase for Bis-TPE -Hg 2+ complex. The unique Hg 2+ -induced gel transition was further distinguished from low-order spherical morphology for Bis-TPE to high-order fibrous morphology for Bis-TPE -Hg 2+ complex. The maximum fluorescence wavelength exhibited the giant shift from 494 nm for Bis-TPE in gel to 606 nm for Bis-TPE -Hg 2+ in gel. This kind of triple responses on photophysical, liquid crystalline and gel properties for metal-coordination self-assemble system was described for the first time, affording a new idea on design of new multiple-response materials with unique properties.
研究领域:
超分子化学
·
材料科学
·
配位化学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 7
·2890-2896
·
IF 3.288
Yinhui Yang,Meiling Qi,Jinliang Wang
Here we report a novel hexaphenylbenzene (HPB)-based material functionalized with six tetraphenylethylene units (BPT) with unique conformation-driven selectivity for gas chromatographic (GC) separations. It is composed of a neat aromatic hydrocarbon with a rigid propeller-like conformation. As a result, the BPT capillary column exhibited high column efficiency of 5340 plates per m and high-resolution capability for aromatic to aliphatic isomers with excellent intra-day and inter-day repeatability and between-column reproducibility. The results demonstrate the unique conformation-driven selectivity of the HPB-based stationary phase, which is rarely reported for chromatography. Moreover, its application in the determination of isomer impurities in commercial products proved its good potential for practical GC analysis. This work presents a new perspective for developing selective stationary phases by engineering their structures.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
FARADAY DISCUSSIONS
·
2016
·Vol. 196
·91-99
·
IF 3.544
Feng Zhang,Tianye Zhou,Guogang Liu,Jianbing Shi,Haizheng Zhong,Yuping Dong
The surfaces of semiconductor nanocrystals have been known to be a very important factor in determining their optical properties. The introduction of functionalized ligands can further enhance the interactions between nanocrystals, which is beneficial for the assembly of nanocrystals. In a previous report, we developed a ligand-assisted reprecipitation method to fabricate organometal halide perovskite nanocrystals capped with octylamine and oleic acid. Here, a TPE derivative 3-(4-(1,2,2-triphenylvinyl)phenoxy)propan-1-amine, which shows a typical aggregation induced emission feature, is applied to replace octylamine to fabricate CH3NH3PbBr3 nanocrystals. The obtained CH3NH3PbBr3 nanocrystals were nanocubes (average diameter ∼ 11.1 nm) and are likely to assemble into ordered superstructures. By adjusting the chain length of the TPE derivative, we found that the assembly of the CH3NH3PbBr3 nanocrystals was correlated with the interactions between the TPE groups. This provides a new platform to investigate the ligand effects in nanocrystal solids and may potentially achieve enhanced optical and electrical properties.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Yue Cai,Jingkun Fang,Bingfeng Wang,Fangshuai Zhang,Guang Shao,Yingju Liu
Organophosphorus pesticides (OPs) have been broadly used in agriculture because of their high insecticidal efficiency. However, most OPs are highly toxic, since they can irreversibly inhibit acetylcholinesterase (AChE), leading to the neurotransmitter acetylcholine disorder which triggers a series of neurological diseases, and even death. Therefore, the rapid and sensitive detection of OPs is of great significance to life health and environmental protection. In this work, new derivatives of tetraphenylethene (TPE) with one or two aldehyde groups were synthesized and characterized, showing that they exhibited different aggregation-induced emission (AIE) effects in different pH solutions. Especially, the hydrolysis product of acetylthiocholine iodide (ATCh) catalyzed by acetylcholinesterase (AChE) can influence the pH of solution, causing the protonation of TPE-1 and changing its fluorescent intensity. Considering that the AChE activity can be specifically inhibited by OPs, the proposed TPE-1 was used to detect OPs between 0.009 and 22.5 mg/L with a detection limit of 0.008 mg/L. In addition, the selectivity was acceptable, providing a possible application for the detection of OPs.
研究领域:
分析化学
·
环境科学
·
毒理学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
·
2021
·
IF 0.896
Xiangfei Kong,Ronggen Luo,Hongkang Gong,Dong Chen,Shijun Yang,Shiqing Li,Guixia Wang,Zhiqun He
A novel aggregation-induced emission active molecules (TP-Cn-PETPE, n = 4 and 10) were synthesized, which contain a tetraphenylethene derivative as the emission active moiety, a pentahexyloxytriphenylene core as the mesogenic unit and an alkoxy spacer. Experimental results revealed that these two compounds both had AIE properties, even in the liquid state at room temperature. While only TP-C4-PETPE showed a monotropic liquid crystal phase upon heating. In addition, these two compounds were fully characterized by 1H and 13C NMR, IR, EA and MS.
研究领域:
材料科学
·
化学
·
液晶
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）