Dyes and Pigments最新文献_第7页

A thiophene-based bisazomethine and its inclusion complex with permethylated β-cyclodextrin: Exploring structural characteristics and computational chemistry models 噻吩基双氮杂环丁烷及其与过甲基化β-环糊精的包合物：探索结构特征和计算化学模型

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-09-26 DOI: 10.1016/j.dyepig.2024.112472

Ana-Maria Resmerita , Corneliu Cojocaru , Mariana-Dana Damaceanu , Mihaela Balan-Porcarasu , Sergiu Shova , Alae El Haitami , Aurica Farcas

The condensation reaction of 5-bromo-2-thiophenecarboxaldehyde (1) with p-phenylene diamine (2) in 2:1 M ratio yielded the thiophene-based bisazomethine with bromine ends (3). The threading of 3 into the permethylated β-cyclodextrin (TMe-βCD) cavity allowed the formation of a new 3∙TMe-βCD inclusion complex. Spectral techniques like NMR, FTIR, XRD and ESI-MS were involved to assess the structural characteristics of 3 and 3∙TMe-βCD. The X-ray diffraction, DFT computations and molecular docking simulations were used to support the experimental findings. The surface morphology as well the ability to form stable monolayers at the air-water interface was further explored in detail. According to the molecular docking simulation, the 3∙TMe-βCD inclusion complex was stabilized through hydrophobic contacts and exhibited better surface parameters and thermal properties. With regard to the optical behavior, the 3∙TMe-βCD exhibited a higher green fluorescence with two decay times of 0.48 ns (87.40 %) and 3.48 ns (12.60 %). The surface pressure isotherms revealed the tendency of 3∙TMe-βCD to form highly organized monolayers from dilute DCM solution at the air-water interface. The Brewster angle microscopy (BAM) investigations also demonstrated a better homogeneity of the 3∙TMe-βCD layers than those of the reference 3. The comparative investigation of the photophysical and electrochemical properties highlighted the superiority of the encapsulated 3∙TMe-βCD compound that are of fundamental importance in organic electronics.

5-bromo-2-thiophenecarboxaldehyde (1) 与对苯二胺 (2) 以 2:1 M 的比例发生缩合反应，生成了以噻吩为基础、以溴为末端的双氮杂环丁烷 (3)。将 3 穿入过甲基化的 β-环糊精（TMe-βCD）空腔可形成新的 3∙TMe-βCD 包合物。核磁共振、傅立叶变换红外光谱、X 射线衍射和 ESI-MS 等光谱技术用于评估 3 和 3∙TMe-βCD 的结构特征。X 射线衍射、DFT 计算和分子对接模拟被用来支持实验结果。研究人员进一步详细探讨了该化合物的表面形态以及在空气-水界面形成稳定单层的能力。根据分子对接模拟，3∙TMe-βCD 包合复合物通过疏水接触得到稳定，并表现出更好的表面参数和热性能。在光学行为方面，3∙TMe-βCD 表现出更高的绿色荧光，两次衰减时间分别为 0.48 ns（87.40%）和 3.48 ns（12.60%）。表面压力等温线揭示了 3∙TMe-βCD 在空气-水界面上从稀 DCM 溶液中形成高组织单层的趋势。布儒斯特角显微镜（BAM）研究也表明，3∙TMe-βCD 层的均匀性优于参照物 3。对光物理性质和电化学性质的比较研究凸显了封装 3∙TMe-βCD 化合物的优越性，这在有机电子学中至关重要。

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引用次数: 0

Design of α-ketone aryl thioesters photoinitiators for LED photopolymerization 设计用于 LED 光聚合的 α-酮芳基硫代酯光引发剂

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-09-26 DOI: 10.1016/j.dyepig.2024.112474

Weifeng Ma , Wei Jia , Yanjing Gao , Fang Sun

In this study, we designed and synthesized four α-ketone aryl thioesters photoinitiators (PTEs) with excellent cytocompatibility for LED photopolymerization using a simple one-step reaction. We investigated the potential photopolymerization initiation mechanisms of PTEs under 405 nm LED irradiation through ultraviolet–visible absorption spectroscopy, high-resolution mass spectroscopy, and electron spin resonance. Our findings revealed that PTEs can effectively initiate the photopolymerization of acrylate monomer tripropylene glycol diacrylate (TPGDA) under either 405 nm or 455 nm LED irradiation, achieving double bond conversions of approximately 80 % or higher after 180 s of irradiation. Remarkably, compared to the commercial photoinitiator 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO) and benzoyl methacrylate (MBF), PTEs exhibit certain advantage in initiating photopolymerization of triethylene glycol dimethacrylate (TEGDMA) widely used for dental materials under the irradiation of 405 nm. More importantly, MO-PTE has better cytocompatibility compared to TPO and exhibits a great potential in the fields of LED photopolymerization, biomaterials and food packaging.

在这项研究中，我们设计并合成了四种α-酮芳基硫代酯光引发剂（PTEs），它们具有优异的细胞相容性，可通过简单的一步反应实现 LED 光聚合。我们通过紫外可见吸收光谱、高分辨率质谱和电子自旋共振研究了 PTEs 在 405 纳米 LED 照射下的潜在光聚合引发机制。我们的研究结果表明，在 405 纳米或 455 纳米 LED 的辐照下，PTEs 可有效地引发丙烯酸酯单体三丙二醇二丙烯酸酯（TPGDA）的光聚合反应，在 180 秒的辐照后可实现约 80% 或更高的双键转化率。值得注意的是，与商用光引发剂 2,4,6-三甲基苯甲酰基二苯基氧化膦（TPO）和甲基丙烯酸苯甲酰酯（MBF）相比，PTE 在 405 纳米辐照条件下引发广泛用于牙科材料的三甘醇二甲基丙烯酸酯（TEGDMA）的光聚合时表现出一定的优势。更重要的是，与 TPO 相比，MO-PTE 具有更好的细胞相容性，在 LED 光聚合、生物材料和食品包装领域表现出巨大的潜力。

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引用次数: 0

Synthesis and electropolymerization of a selenophene based chemiluminescent monomer and its use in blood detection 基于硒吩的化学发光单体的合成和电聚合及其在血液检测中的应用

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-09-25 DOI: 10.1016/j.dyepig.2024.112471

Burcu Balci , Deniz Cakal , Atilla Cihaner

A new selenophene based trimeric chemiluminescent compound, namely 5,7-di(selenophen-2-yl)-2,3-dihydrothieno[3,4-d]pyridazine-1,4-dione (S₂T-Lum), was synthesized in two steps via electron donor-acceptor-donor approach. Its chemiluminescent reaction with hydrogen peroxide was investigated in an alkaline solution in the presence of various catalysts such as different metal ions, hemin and blood samples and the results were compared with its thiophene analogue (T₂T-Lum) and luminol. It was found that S₂T-Lum was very sensitive to copper(II) and iron(III) ions, and blood samples. Also, it can be easily concluded that S₂T-Lum as a new member of luminol type compounds is a potential candidate for the detection of blood findings in forensic science. Furthermore, S₂T-Lum has an irreversible oxidation peak at 1.28 V vs Ag/AgCl, which is responsible from its electropolymerization. S₂T-Lum was successfully polymerized electrochemically via potentiodynamic electrolysis without cleavage of its chemiluminescent active appendage. To the best of our knowledge, its corresponding polymer PS₂T-Lum film is the first member of selenophene based luminol type electroactive polymers.

通过电子供体-受体-供体方法，分两步合成了一种新的硒吩基三聚化学发光化合物，即 5,7-二（硒吩-2-基）-2,3-二氢噻吩并[3,4-d]哒嗪-1,4-二酮（S2T-Lum）。在碱性溶液中，在不同催化剂（如不同金属离子、hemin 和血液样本）的存在下，研究了它与过氧化氢的化学发光反应，并将结果与其噻吩类似物（T2T-Lum）和发光酚进行了比较。结果发现，S2T-Lum 对铜（II）和铁（III）离子以及血液样本非常敏感。同时，可以很容易地得出结论，S2T-Lum 作为发光酚类化合物的新成员，是法医学中检测血液结果的潜在候选化合物。此外，S2T-Lum 在 1.28 V 对 Ag/AgCl 的电压下有一个不可逆的氧化峰，这是由它的电聚合作用引起的。S2T-Lum 通过电位动力电解法成功实现了电化学聚合，其化学发光活性附属物没有发生裂解。据我们所知，其相应的聚合物 PS2T-Lum 薄膜是第一种基于硒吩的发光酚型电活性聚合物。

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引用次数: 0

Optoelectronic properties study of arylamine-functionalized benzothiophenes and benzothiophene S,S-Dioxides. Application in solution-processed organic light-emitting diodes 芳基胺功能化苯并噻吩和苯并噻吩 S,S-二氧化物的光电特性研究。在溶液处理有机发光二极管中的应用

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-09-24 DOI: 10.1016/j.dyepig.2024.112468

Khaled Youssef , Akpeko Gasonoo , Charles Cougnon , Matthieu Loumaigne , Hayley Melville , Lionel Sanguinet , Gregory C. Welch , Frédéric Gohier

Conjugated organic molecules based on core benzothiophene (BT) and benzothiophene S,S-dioxide (BTO), substituted with triphenylamines at positions 3,5,6 and 2,4,7, were designed via Suzuki couplings. Optoelectronic properties were studied, and theoretical calculations were carried out to understand the structured absorbance spectra of the various compounds. All compounds exhibited bright emission within the visible region, ranging from blue for BT to yellow-orange for BTO. Organic light-emitting diode (OLED) devices were fabricated through an air-processed spin-coating method where all layers, except the top cathode, were solution-processed. Device luminance exceeded 1000 cd/m² using 2,4,7-triphenylaminebenzothiophene S,S-dioxide, which in turn was successfully translated to a large-area module slot-die coated on a plastic substrate.

通过铃木偶联设计了基于核心苯并噻吩（BT）和苯并噻吩 S,S-二氧化物（BTO）的共轭有机分子，并在 3,5,6 和 2,4,7 位置用三苯胺取代。研究人员研究了这些化合物的光电特性，并进行了理论计算，以了解各种化合物的结构吸光度光谱。所有化合物都在可见光区域内发出明亮的光，从 BT 的蓝色到 BTO 的黄橙色不等。有机发光二极管（OLED）器件是通过空气处理旋涂法制造的，其中除顶部阴极外，所有层都是溶液处理的。使用 2,4,7-三苯胺苯并噻吩 S,S-二氧化物制造的器件亮度超过 1000 cd/m2，并成功地将其转化为涂覆在塑料基板上的大面积模块槽模。

引用次数: 0

Nanosized hyperbranched cobalt and metal-free phthalocyanine intercalated with Pd–C matrix using PVA-TEOS as binder for admirable supercapacitor properties 使用 PVA-TEOS 作为粘合剂，在 Pd-C 基体中插层纳米级超支化钴和无金属酞菁，实现令人赞叹的超级电容器性能

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-09-21 DOI: 10.1016/j.dyepig.2024.112466

Mohammed Yaseen , Mahadevappa Y. Kariduraganavar , AfraQuasar A. Nadaf , Mahesh S. Najare , Mohemmedumar S. Mulla

The expanding global economy resulted mainly from consuming fossil fuels, which are scarce and cause prodigious environmental harm. Mankind is shifting towards sustainable, efficient and clean energy sources known as green energy. The storage of green energy is an urge of time, to fulfil the energy requirements. Supercapacitors are gaining popularity in the field of energy storage due to their excellent safety, cost-effectiveness, and environmental friendliness. The forthright strategy of using a nitrogen-rich phthalocyanine macrocycle as a nanosized particle is to increase surface area resulting in a high specific capacitance. Herein, an innovative approach has been made by synthesising nanosized hyperbranched metal-free/Co-Phthalocyanine characterized by various analytical and spectroscopic techniques. The morphology of the composite was confirmed through physicochemical characterization like BET, SEM, XRD and electrochemical features were studied through cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS). The electrode modification was carried out using the binder Poly (vinyl alcohol)-Tetraethyl orthosilicate (PVA-TEOS) crosslinked hybrid solution. The intercalated nanosized palladium on carbon matrix with HBCoPc and HBPc at different ratios enhanced the performance of capacitance. Amongst all the ratios, HBCoPc: Pd–C with 30:70 ratio has demonstrated superior specific capacitance of 824.25 F g⁻¹ at 0.5 A g⁻¹. Additionally, the fabricated electrode of HBCoPc: Pd–C and HBPc: Pd–C has exhibited good capacitance retention of 84.03 % and 81.01 % over 5000 cycles, respectively. This work delivers a promising approach towards the development of high-performance supercapacitors using metal phthalocyanine/metal-carbon composites as a new way to manufacture devices for conversion and energy storage.

全球经济的不断发展主要源于化石燃料的消耗，而化石燃料稀缺且对环境造成巨大危害。人类正在转向可持续、高效和清洁的能源，即绿色能源。为了满足能源需求，绿色能源的存储是一种时间的紧迫性。超级电容器因其出色的安全性、成本效益和环保性，在能源存储领域越来越受欢迎。使用富氮酞菁大环作为纳米颗粒的直截了当的策略是增加表面积，从而获得高比电容。在此，我们采用了一种创新方法，通过各种分析和光谱技术合成了纳米级超支化无金属/共酞菁。通过 BET、SEM、XRD 等物理化学表征确认了复合材料的形态，并通过循环伏安法（CV）、电静态充放电法（GCD）和电化学阻抗光谱法（EIS）研究了其电化学特征。电极改性是使用粘合剂聚（乙烯醇）-正硅酸四乙酯（PVA-TEOS）交联混合溶液进行的。在碳基体上以不同比例插层 HBCoPc 和 HBPc 的纳米钯提高了电容性能。在所有比例中，HBCoPc：Pd-C 的比例为 30:70，在 0.5 A g-1 的条件下，比电容高达 824.25 F g-1。此外，HBCoPc: Pd-C 和 HBPc: Pd-C 制成的电极在 5000 次循环中分别表现出 84.03 % 和 81.01 % 的良好电容保持率。这项工作为利用金属酞菁/金属碳复合材料开发高性能超级电容器提供了一种前景广阔的方法，是制造转换和储能设备的新途径。

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引用次数: 0

Interface engineering by module customization of π-conjugated groups in hole transport materials for perovskite solar cells: Theoretical simulation and experimental characterization 通过模块定制π-共轭基团在过氧化物太阳能电池空穴传输材料中的界面工程：理论模拟和实验表征

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-09-21 DOI: 10.1016/j.dyepig.2024.112464

Jiayi Qi , Chengyu Wu , Ruiqin Wang , Xin Chen , Fei Wu , Xiaorui Liu

Interface engineering is an effective approach to improve the power conversion efficiency (PCE) of perovskite solar cells (PSCs). To achieve the regulation of intermolecular and interfacial interactions from the point of view for the molecular design of hole transport materials (HTMs), the HTMs of CY9 and CY10 are designed by conjugate management on side-chain groups of carbazole-diphenylamine derivatives. Theoretical simulation demonstrates that the larger π-conjugate units in side-chain of CY10 improve the molecular planarity, thereby enhancing the potential for intermolecular π-π stacking and charge coupling. Molecular dynamics (MD) and first-principles simulations indicates that CY10 is uniformly distributed and compactly arranged on perovskite surface, which enhances intermolecular coupling strength, promotes hole transfer, and facilitates the interfacial interactions at perovskites/HTMs interface. The experimental results validated the reliability of the theoretical simulations, which demonstrated that CY10 as HTM exhibited tighter intermolecular π-π stacking, smooth film morphology, low interfacial defect density, and effective suppression of energy loss caused by interfacial non-radiative recombination. Consequently, the PSC devices based on CY10 exhibited a higher V_OC than CY9. This work presents a strategy from the point of view for the molecular design of HTMs to enhance the interfacial interactions of the perovskite/HTM interface.

界面工程是提高过氧化物太阳能电池（PSCs）功率转换效率（PCE）的有效方法。为了从空穴传输材料（HTMs）分子设计的角度实现对分子间和界面相互作用的调控，我们通过对咔唑-二苯胺衍生物侧链基团的共轭管理设计了 CY9 和 CY10 的 HTMs。理论模拟表明，CY10 侧链中较大的 π 共轭单元改善了分子的平面性，从而提高了分子间 π-π 堆积和电荷耦合的潜力。分子动力学（MD）和第一性原理模拟表明，CY10 在包晶表面均匀分布且排列紧凑，从而增强了分子间耦合强度，促进了空穴传输，并有利于包晶/HTMs 界面的界面相互作用。实验结果验证了理论模拟的可靠性，表明作为 HTM 的 CY10 表现出更紧密的分子间 π-π 堆叠、平滑的薄膜形貌、较低的界面缺陷密度，并有效抑制了由界面非辐射重组引起的能量损失。因此，与 CY9 相比，基于 CY10 的 PSC 器件具有更高的 VOC。这项研究从 HTM 分子设计的角度提出了一种增强包晶/HTM 界面相互作用的策略。

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引用次数: 0

Enhanced adsorption and catalytic degradation of antibiotics by CoFe2O4–NH2@DJB2-900 activated peroxymonosulfate: An experimental and mechanistic investigation CoFe2O4-NH2@DJB2-900活化过一硫酸盐增强抗生素的吸附和催化降解：实验和机理研究

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-09-20 DOI: 10.1016/j.dyepig.2024.112467

Xuewei Song , Hongyuan Zhang , Xueke Diao , Bin Wang , Chenzhao Wang , Shanshan Wei , Xiangyu Yin , Chunzhu Jiang , Guoying Sun

In recent years, with the widespread use of antibiotics in clinical, a large number of residual antibiotics have been discharged into aquatic environments, posing a substantial threat to human well-being. In this paper, the recyclable magnetic catalyst CoFe₂O₄–NH₂@DJB₂-900 (CFN@DJB₂-900) was prepared by combining biochar derived from diaphragma juglans (DJ) with magnetic material CoFe₂O₄–NH₂ (CFN). This catalyst could not only effectively activate peroxymonosulfate (PMS) to degrade levofloxacin (LEF), but also realize rapid separation from the matrix. After four cycles, the LEF removal rate could still maintain at 83.91 %. The quenching experiments and electron paramagnetic resonance (EPR) analysis demonstrated that LEF was degraded by defluorination, depiperazinylation, demethylation and ring opening in CFN@DJB₂-900/PMS system with the help of O₂∙^-, ¹O₂ and electron transfer. The LEF removal rate of 94.32 % was achieved within 10 min. Moreover, the material exhibited wide applicability, good anti-interference ability and reusability. Therefore, this study provided a simple and feasible strategy to prepare an efficient activator CFN@DJB₂-900 for the degradation of levofloxacin.

近年来，随着抗生素在临床上的广泛应用，大量残留抗生素被排入水生环境，对人类健康造成了极大威胁。本文通过将从菊芋（DJ）中提取的生物炭与磁性材料 CoFe2O4-NH2 （CFN）结合，制备了可回收磁性催化剂 CoFe2O4-NH2@DJB2-900（CFN@DJB2-900）。这种催化剂不仅能有效激活过一硫酸盐（PMS）降解左氧氟沙星（LEF），还能实现与基质的快速分离。四次循环后，左氧氟沙星的去除率仍能保持在 83.91%。淬灭实验和电子顺磁共振（EPR）分析表明，左氧氟沙星在CFN@DJB2-900/PMS体系中通过脱氟、脱哌嗪基、脱甲基和开环作用，借助O2∙-、1O2和电子传递实现降解。在 10 分钟内，LEF 去除率达到 94.32%。此外，该材料还具有广泛的适用性、良好的抗干扰能力和可重复使用性。因此，本研究为制备高效降解左氧氟沙星的活化剂 CFN@DJB2-900 提供了一种简单可行的策略。

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引用次数: 0

A mitochondria-targeted near-infrared fluorescent probe for pH monitoring in living cells based on the rhodamine-hemicyanine hybrid structure 基于罗丹明-水杨酸杂交结构的用于监测活细胞 pH 值的线粒体靶向近红外荧光探针

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-09-19 DOI: 10.1016/j.dyepig.2024.112465

Xin Ji, Qi Jin, Yongqin Shi, Xiao-Feng Yang

Mitochondrial pH plays a crucial role in cellular metabolism and pathological conditions. Thus, tracking changes in mitochondrial pH is essential for understanding its impact on cellular processes. In this work, we report a mitochondria-targetable near-infrared pH-sensitive fluorescent probe, Rh-NorCy, based on the rhodamine-hemicyanine hybrid structure. Rh-NorCy contains a non-alkylated indolenine moiety as recognition site of pH and a triphenylphosphonium moiety as the mitochondria-targeting group. As the solution pH decreases from 9.1 to 5.8, the indolium N atom in the Rh-NorCy structure undergoes protonation, leading to a red shift of its maximum absorption wavelength from 568 nm to 709 nm and a significant fluorescence enhancement at 748 nm simultaneously. Importantly, Rh-NorCy exhibits a suitable pK_a (7.27) to map the pH variation in the mitochondria. Rh-NorCy demonstrates excellent photostability, minimal cytotoxicity, and strong mitochondria-targeting capability. It has been used to observe mitochondrial pH fluctuations during starvation and carbonylcyanide m-chlorophenylhydrazone (CCCP)-induced mitophagy.

线粒体 pH 值在细胞代谢和病理状态中起着至关重要的作用。因此，跟踪线粒体 pH 值的变化对于了解其对细胞过程的影响至关重要。在这项工作中，我们报告了一种基于罗丹明-血丙氨酸杂交结构的线粒体靶向近红外 pH 敏感荧光探针 Rh-NorCy。Rh-NorCy 含有一个非烷基化的吲哚啉分子作为 pH 值识别位点，一个三苯基膦分子作为线粒体靶向基团。当溶液 pH 值从 9.1 降到 5.8 时，Rh-NorCy 结构中的吲哚鎓 N 原子发生质子化，导致其最大吸收波长从 568 纳米红移到 709 纳米，同时在 748 纳米处的荧光显著增强。重要的是，Rh-NorCy 的 pKa 值（7.27）适合绘制线粒体中的 pH 值变化图。Rh-NorCy 具有出色的光稳定性、最小的细胞毒性和强大的线粒体靶向能力。它已被用于观察线粒体在饥饿和羰基氰化间氯苯腙（CCCP）诱导的有丝分裂过程中的 pH 波动。

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引用次数: 0

Stability and photophysical study of bright day light fluorescent material and its fabrication in laser patterning and LED application 昼光荧光材料的稳定性和光物理研究及其在激光制图和 LED 应用中的制造方法

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-09-18 DOI: 10.1016/j.dyepig.2024.112463

Ramalingam Manivannan , Kaliyan Prabakaran , Sumit Kumar Patra , Hyunseo Kim , Sang Kyoo Lim , Young-A Son

Developing aggregation-induced emission (AIE) active highly visible fluorescent dyes is of great importance because of its numerous applications. We have successfully developed and synthesized two novel napthalimide based molecules PU1 and PU2, that exhibit bright greenish yellow in day light and vivid green emission when exposed to UV light. Compounds PU1 and PU2 exhibit variable emission behavior at different solvent polarities. Upon raising the solvent polarity from ether to DMF, emission maxima of PU1 and PU2 underwent a bathochromic shift. Additionally, compounds PU1 and PU2 show signs of AIE, which cause a restriction in intramolecular mobility. A distinct self-assembled structure was generated at 30 % aqueous DMF solution following aggregation, as demonstrated by experiments using dynamic light scattering and field emission scanning electron microscopy. Compounds PU1 and PU2 have been blended with poly(urethane) to develop a polymeric film. Tensile strain studies, and TGA, DSC analyses were used to examine the thermal/mechanical stability of PU films. The photostability of PU1 and PU2 in both solution and polymeric film was examined using a 5-h UV-beam irradiation. Furthermore, in the presence of trifluoroacetic acid, the blended polymeric film and 365 nm LED light coated material exhibits distinct colorimetric and fluorimetric transformations. Finally, laser-induced periodic surface structure (LIPSS) pattern processing on PU1 coated substrates can be extended for optical applications.

聚合诱导发射（AIE）活性高可见度荧光染料应用广泛，因此开发这种染料具有重要意义。我们成功开发并合成了两种基于萘二甲酰亚胺的新型分子 PU1 和 PU2，它们在日光下呈现明亮的黄绿色，在紫外光下则发出鲜艳的绿色。化合物 PU1 和 PU2 在不同的溶剂极性下表现出不同的发射行为。当溶剂极性从乙醚升高到 DMF 时，PU1 和 PU2 的发射最大值发生了浴色偏移。此外，化合物 PU1 和 PU2 还显示出 AIE 的迹象，导致分子内流动性受到限制。通过使用动态光散射和场发射扫描电子显微镜进行实验证明，在 30% 的 DMF 水溶液中聚集后会产生独特的自组装结构。PU1 和 PU2 化合物与聚（氨基甲酸乙酯）混合，形成了一层聚合物薄膜。拉伸应变研究、TGA 和 DSC 分析被用来检测聚氨酯薄膜的热稳定性/机械稳定性。通过 5 小时的紫外线光束照射，检测了溶液和聚合物薄膜中 PU1 和 PU2 的光稳定性。此外，在三氟乙酸存在的情况下，混合聚合物薄膜和 365 纳米 LED 光涂层材料表现出明显的比色和荧光转化。最后，在 PU1 涂层基底上进行激光诱导周期性表面结构（LIPSS）图案处理可扩展到光学应用领域。

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引用次数: 0

Carbazole capped Schiff base and its boron difluoride complex as luminescent columnar phases with application as turn on chemosensor towards Al3+ as well as WLED 咔唑封端希夫碱及其二氟化硼配合物作为发光柱状相，可用作 Al3+ 和 WLED 的开启化学传感器

IF 4.1 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments

Pub Date : 2024-09-17 DOI: 10.1016/j.dyepig.2024.112439

Zilong Guo , Shibo Chen , Yuantang Duan , Qiong Xiao , Qi Yan , Xiaohong Cheng

Three carbazole Schiff base derived hexacatenar liquid crystals (LCs) L/n (n = 12, 14, 16) composed of salicylaldimines as the central core with N-trialkoxylbenzyl carbazole capped at one side and trialkoxybenzoate capped at the other side have been synthesized. The BF₂ complex of L/12 was also successfully prepared. Both carbazole Schiff bases L/n and BF₂ complex L-BF₂/12 can self-assemble into luminescent Col_squ/p4mm LC phases with local helical structures in their bulk states. L/n can additionally self-assemble into luminescent organogels with winkled morphologies. Study on the photophysical property indicates that both L/12 and its BF₂ complex L-BF₂/12 show large Stokes shift with yellow greenish emission. L/12 shows AIEE effect and can be applied as turn on Al³⁺ chemical sensors. BF₂ complex L-BF₂/12 with stronger emission than L/12 has been used to generate a white light emission diode (WLED).

我们合成了三种咔唑席夫碱衍生六碳烯纳液晶（LC）L/n（n = 12、14、16），它们以水杨醛亚胺为中心核，一侧封端为 N-三烷氧基苄基咔唑，另一侧封端为三烷氧基苯甲酸酯。L/12 的 BF2 复合物也已成功制备。咔唑席夫碱 L/n 和 BF2 复合物 L-BF2/12 都能自组装成发光的 Colsqu/p4mm LC 相，其主体状态具有局部螺旋结构。此外，L/n 还能自组装成具有褶皱形态的发光有机凝胶。对其光物理性质的研究表明，L/12 及其 BF2 复合物 L-BF2/12 均显示出较大的斯托克斯偏移，并发出黄绿色的光。L/12 显示出 AIEE 效应，可用作开启 Al3+ 化学传感器。与 L/12 相比，BF2 复合物 L-BF2/12 的发射更强，已被用于生成白光发射二极管（WLED）。

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引用次数: 0