JOURNAL OF APPLIED POLYMER SCIENCE
·
2013
·Vol. 130
·期 2
·1399-1405
·
IF 1.395
Jiajie Wu,Jiachun Feng
A novel hindered amine ligand, mono-2,2,6,6-tetramethyl-4-piperidyl-succinate (MTPS), has been designed to chelate europium(III) ion with 1,10-phenanthroline (Phen) as a coligand to prepare polymer photostabilizer. The luminescent property of the stabilizer and its efficiency of protecting polymer matrix from photodegradation have also been investigated. Under UV excitation, the stabilizer has red light emission in both ethanol solution and polypropylene (PP) matrix. The PP sheets containing the stabilizer display significantly improved photostability, which may be attributed to MTPS which scavenges radical, as well as Phen which makes the complex dissipate the absorbed ultraviolet light in a harmless manner. These preliminary results demonstrate that the introduction of the stabilizer can endow polymer matrices not only excellent photoluminescent properties but also improved photostability. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 1399-1405, 2013
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2020
·
IF 7.888
Lei Liu,Han Gao,Shu-Qing Yang,Xiao-Chao Chen,Yong Lu,Ye Liu,Fei Xia
The one-pot tandem hydroformylation-reduction to synthesize alcohols from olefins is in great demand but suffering from low yields, poor selectivity and harsh condition. Herein, 1,10-phenanthroline ( L1 ) modified Ir-catalyst proved to exhibit multiple catalysis in terms of FA dehydrogenation, hydroformylation of olefins, and transfer hydrogenation of aldehydes to accomplish the tandem hydroformylation-transfer hydrogenation of olefins with formic acid (FA) as hydrogen source, as the result of 52–70% yields for the target alcohols and the corresponding formate esters (obtained upon esterification of the alcohol with FA). In this sequence, only the use of FA with trans - and cis -conformers could fulfill the reduction of aldehydes to the alcohols through transfer hydrogenation as well as greatly depress hydrogenation of the olefin, which universally occurred in the high pressured gaseous H 2 . Both the in situ FT-IR spectroscopic analysis and the DFT-calculations verified that, over L1 -[Ir(COD)Cl] 2 catalyst, cis -FA serving as the hydride-ligand was responsible for the efficient dehydrogenation of FA to release H 2 along with CO 2 , and trans- FA serving as the carbonyl O-containing ligand corresponded to the transfer hydrogenation of the aldehydes to the alcohols under the same catalytic conditions.
研究领域:
有机化学
·
催化化学
✓ 已验证
DOI
高影响因子
RADIATION PHYSICS AND CHEMISTRY
·
2025
·
IF 3.3
Hanqin Weng,Baoying Zhang,Yizhi Chen,Shinichi Yamashita,Yusa Muroya,Hao Yu,Xinrui Zhang,Xiaofan Yang,Weiqun Shi
The ligand of 2,9-Diamide-1,10-phenanthroline (DAPhen), developed for group actinide separation in the past decade, showed excellent extraction and separation performance for various actinides from trivalent lanthanides. However, its radiolysis mechanism remains unclear, restricting its application. Mechanism for the radiolysis of three different DAPhen in 1-octanol was studied by pulse radiolysis, of which the results demonstrated that reductive degradation was the main route of their radiolysis in 1-octanol. Solvated electrons (e sol − ), and α-hydroxyoctyl radicals have been recognized as the most important transient species responsible for DAPhen radiolysis. Rate constants for the reactions of e sol − with N,N′ -diethyl- N,N′ -ditethyl-2,9-diamide-1,10-phenanthroline (Et–Et-DAPhen, EED), N,N′ -dioctyl- N,N′ -ditoctlyl-2,9-diamide-1,10-phenanthroline (Oct-Oct-DAPhen, OOD), and N,N′ -diethyl- N,N′ -ditolyl-2,9-diamide-1,10-phenanthroline (Et-Tol-DAPhen, ETD) were estimated to be 1.9 × 10 9 , 2.3 × 10 9 , and 1.5 × 10 9 L mol −1 s −1 , respectively. Those of α-hydroxyoctyl radicals with EED, OOD, and ETD were approximately 1.1 × 10 8 , 2.1 × 10 8 , and 2.7 × 10 8 L mol −1 s −1 , respectively. The studied DAPhen exhibited high reactivity with e sol − , and α-hydroxyoctyl radicals in 1-octanol, resulting in their vulnerability under irradiation. A versatile strategy was accordingly proposed to enhance their radiation stability based on the insights into transient processes of DAPhen radiolysis. If the HNO 3 -equilibrated organic phase was saturated with nitrous oxide (N 2 O), the reductive species responsible for DAPhen degradation would be scavenged. As a consequence, the radiation-resistance of DAPhen was significantly improved because the key elementary reaction of radiolysis was inhibited by the synergetic effect of N 2 O and HNO 3 .
研究领域:
放射化学
·
配体设计
·
核化学与技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Min Liu,Zhuoer Cai,Yang Xu,Jinzhong Hu,Baiwang Sun
Rare earth-based polystyrene (PS) fluorescent microspheres, which vigorously combine the merits of rare earth elements and polystyrene microspheres, hold great potential for applications in the state-of-the-art technology and tremendous efforts have been devoted to the photoluminescence field. Herein, a 5-acrylamido-1,10-phenanthroline (Aphen) and Eu(III)-based polystyrene fluorescent microsphere was developed via a facial copolymerization strategy. The optimal complexes of Eu(β-NTA)3(Aphen) and Eu(BFA)3(TPPO)2 were fabricated as the luminescent materials. Specifically, Eu(β-NTA)3(Aphen)-PS was modified for the first time to enhance the photoluminescence property, which effectively integrated the Aphen with styrene monomer. Meanwhile, Eu(BFA)3(TPPO)2 was encapsulated into PS microspheres for the realization of Eu(BFA)3(TPPO)2-PS via an ubiquitous embedding process. The fluorescent intensity of Eu(β-NTA)3(Aphen)-PS was notably reinforced along with an increasing concentration of the rare earth complexes. However, the fluorescence intensity of Eu(BFA)3(TPPO)2-PS was decreased when the concentration was 50 mg due to the saturated solubility of the complexes. The obtained copolymerization fluorescent microspheres could prevent the premature leakage of the fluorescent complexes in a natural environment and showed an outstanding photoluminescence efficiency.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Yunkai Sun,Qingqing Song,Meng Cao,Chunhong Tan,Xiao-Feng Wang,Kejie Du,Yuheng Zhang,Yi Ding,Xiaoqiang Xue
Metal-organic complexes, particularly copper complexes, are emerging as promising candidates for anticancer drug due to their versatile redox states. Two copper complexes ( complex1 and complex2 ) have been designed based on the ligands for 1,10-phenanthroline (phen), 4,5-diazofluoren-9-one (DAFO) and 1,4-terephthalic acid (1,4-BDC), and the structures have been determined by X-ray single crystal analysis. The interactions of the complexes with calf thymus DNA (CT-DNA) have been investigated using UV-vis absorption and viscosity measurements. The results indicate that the complex 1 and complex 2 respectively bind to CT-DNA, and the binding mode of the former is in electrostatic binding or groove mode, while that of the latter is in insertion mode. The complex 2 had better activity to break CT-DNA than complex 1 .
研究领域:
无机化学
·
生物无机化学
·
药物化学
·
分子药理学
·
核酸化学
·
晶体学
·
抗肿瘤药物开发
✓ 已验证
产品关联
DOI
高影响因子
Arabian Journal of Chemistry
·
2022
·
IF 6.212
Zizhen Zhao,Chen Fu,Yuping Zhang,Yingying Zhang,Xiaoxi Yang,Ailing Fu
The incidence of HCC continues to increase rapidly in recent years. the principle of developing anti-HCC drugs is to specifically kill tumor cells, without affecting the function of normal cells. Here we synthesized a novel protonic compound bis(5-amino-1,10-phenanthroline) (P-BAP), and the antitumor activity was explored in vitro and in vivo . The results showed that P-BAP could selectively inhibit the proliferation of tumor cells, and induce HCC apoptosis. In HCC-bearing mice, P-BAP could effectively retard the tumor growth, even completely eliminate the tumors at the dose of 5 mg/kg, and meanwhile P-BAP had no significant effect on mouse body weight. Mechanism analysis revealed that P-BAP could down-regulate the protein expressions of pleomorphic adenoma gene like-2 (PLAGL2), HIF-1α and β-catenin, and up-regulate the levels of pro-apoptotic protein BAX and BNIP3. In addition, P-BAP could reduce mitochondrial respiratory chain complex activities, leading to insufficient ATP production. The study provides a new approach for designing selective antitumor drugs, and suggests that P-BAP would be a potential candidate for HCC therapy.
研究领域:
肿瘤学
·
药理学
·
分子生物学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Tianyi Zhang,Si Dong,Feifei Zhao,Mingxiao Deng,Yuqin Fu,Changli Lü
Recently, fluorescent pH test paper has been extensively explored for visual assays due to its easy preparation, low-cost, and portable feature. In addition, intracellular pH also plays important roles in different pathological and physiological processes for understanding cellular functions and providing critical assistance for early disease diagnosis. Herein, the tricolor emission [email protected] carbon dots (CDs) were synthesized via one-pot hydrothermal method using 5-amino-1,10-phenanthroline (Aphen) and citric acid (CA) as the carbon sources. The fluorescence emission of CDs showed an interesting pH dependence due to the special structure and properties, which can make the CDs to be used as the pH test paper to qualitatively and quantitatively detect pH value in a wide pH range. At the same time, because of good cell compatibility and low toxicity, CDs can be used as a new type of cell imaging marker to detect intracellular pH. The unique tricolor emission property of CDs can well avoid the fluorescent dyes and protein fluorescence interference.
研究领域:
材料科学
·
分析化学
·
生物医学工程
·
细胞生物学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Feifei Zhao,Tianyi Zhang,Qian Liu,Changli Lü
For most of the carbon dots (CDs), solid-state fluorescence and room temperature phosphorescence (RTP) are difficult to achieve due to self-quenching and intersystem crossing (ISC) limitations. Here, nitrogen-doped CDs-1 showing both fluorescence and RTP was obtained by hydrothermal reaction from polyvinyl alcohol (PVA) and 5-amino-1,10-phenanthroline (Aphen). The CDs-1 emits blue-green fluorescence in aqueous solution, while emits white fluorescence and yellow-green RTP in the solid state with a RTP lifetime up to 103 ms, exhibiting a long afterglow with a duration of 3 s, which is visible to the naked eyes. The RTP of the CDs-1 is derived from the C N/C N in Aphen and C N/CN in Aphen and C O produced during the carbonization process with a small energy gap between the singlet and triplet states, which helps to realize the ISC. At the same time, the hydrogen bonds between the C N/CN or CO bonds and O H of the not completely carbonized PVA chains on the CDs-1 surface have the advantages of moisture resistance, oxygen barrier and improving the rigidity of CDs-1. Eventually, non-radiative transitions can be suppressed. Based on the decent fluorescence properties, the aqueous solution of CDs-1 can be used to detect TNP and is responsive to pH with a good linear relationship between acid and alkali. In addition, the RTP of CDs-1 can be utilized as banknote anti-counterfeiting material under a long excitation wavelength. This work provides a possibility to realize the multi-mode illumination regulation of CDs by facile one-step strategy.
研究领域:
材料科学
·
化学
·
纳米技术
·
分析化学
·
光学材料
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2024
·Vol. 16
·期 44
·7460-7467
·
IF 2.7
Zhaolu He,Haiyang Xian,Liang Xu,Jianxi Zhu,Mang Lin,Xiaoliang Liang,Hongping He
Accurately quantifying hydrogen peroxide (H2O2) is essential for elucidating its role across diverse environments. Spectrophotometry is widely employed in laboratories for this purpose due to its convenience, cost-effectiveness, and low detection limits for micromolar H2O2 concentrations. However, accurate measurement of H2O2 in iron-containing solutions presents challenges due to the interference of iron ions. In this study, we propose a modified spectrophotometric method for H2O2 determination in iron-containing solutions by adding two types of iron ion chelators and selecting leuco crystal violet (LCV) as a chromogenic reagent due to its stability. By sequentially adding 1,10-phenanthroline and EDTA, and using a phosphate buffer at pH 4.2 to provide the optimal chromogenic pH condition, this modified method effectively mitigates the interference of iron ions in the LCV chromogenic reaction. The applicability of this method under aerobic and anaerobic conditions was confirmed by comparing the experimental results with theoretical simulations. Under optimal chromogenic conditions, this method achieves a detection limit of 300 nM. This improved method allows better detection of H2O2 in iron-containing systems and investigation of its significance in various environmental processes.
研究领域:
分析化学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Research
·
2022
·
IF 11.036
Jin-Meng Heng,Hao-Lin Zhu,Zhen-Hua Zhao,Da-Shuai Huang,Jun-Yi Li,Pei-Qin Liao,Xiao-Ming Chen
Inorganic solids are a kind of important catalysts, and their activities usually come from sparse active sites, which are structurally different from inactive bulk. Therefore, the rational optimization of activity depends on studying these active sites. Copper is a widely used catalyst and is expected to be a promising catalyst for the electroreduction of CO2 to C2H4. Here, we report a conductive dinuclear cuprous complex with a short Cu···Cu contact for the electroreduction of CO2 to C2H4. By using 1H-[1,10]phenanthrolin-2-one and Cu(I) ions, a dinuclear cuprous complex [Cu2(ophen)2] (Cuophen) with a remarkable conductivity (3.9 × 10−4 S m−1) and a short intramolecular Cu···Cu contact (2.62 Å) was obtained. Such a short Cu···Cu contact is close to the distance of 2.54 Å between 2 adjacent Cu atoms in the edge of the copper(100)/(111) plane. Detailed examination of Cuophen revealed a high activity for the electroreduction of CO2 to C2H4 with a Faradaic efficiency of 55(1)% and a current density of 580 mA cm−2, and no obvious degradation was observed over 50 h of continuous operation. Comparing the properties and mechanisms of Cuophen and 2 other copper complexes with different Cu···Cu distances, we found that the shorter Cu···Cu distance is conducive not only for a *CO species to bridge 2 copper ions into a more stable intermediate transition state but also for C–C coupling.
研究领域:
无机化学
·
电催化
·
材料科学
·
能源转换
✓ 已验证
DOI
高影响因子
Solar RRL
·
2021
·Vol. 5
·期 8
·2100285
·
IF 8.582
Shibing Leng,Luyao Wang,Xin Wang,Zhanfei Zhang,Jianghu Liang,Yiting Zheng,Jinkun Jiang,Zhiang Zhang,Xiao (Xiao) Liu,Yuankun Qiu,Chun-Chao Chen
Formamidinium cesium (FACs) perovskite solar cells (PSCs) with the exclusion of methylammonium (MA) cations often have greatly improved device stability; however, their inferior performance compared with MA-based devices has impeded the real application. Among various device engineering strategies, bottom interfacial engineering is a promising method to simultaneously achieve the passivation of interfacial defects and the crystallization control of perovskite. Herein, a simple and effective bottom interfacial design is presented to improve the efficiency and stability of FACs PSCs by capping o-phenanthroline derivatives on the ZnO electron transporting layer (ETL). The most efficient modifier, 4,7-Dichloro-1,10-phenanthroline (Cl-phen), can improve the crystallinity of the perovskite film by chlorinated surface and passivate the defects of ZnO by reducing surface hydroxyl groups and oxygen vacancies. In addition, Cl-phen modified ZnO shows better energy alignment with FACs perovskite and increases the built-in electric field cascade by 80 mV. As a result, a champion device efficiency of 21.15% is obtained using ZnO/Cl-phen bilayer ETL. The stability has also been improved using ZnO/Cl-phen bilayer ETL, in which 91.5% of initial PCE is retained after 1500 h of storage at ambient environment (RH: 40–50%) without encapsulation.
研究领域:
材料科学
·
光伏技术
·
能源材料
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Yuxuan Bai,Yu He,Manman Wang,Gongwu Song
Ti 3 C 2 MXene quantum dots (Ti 3 C 2 MQDs) are recognized as promising new nanomaterial recently, while the majority of the Ti 3 C 2 MQDs manifest limited maximum emission in the blue-light range. Herein, the green fluorescence nitrogen, phosphorus-doped Ti 3 C 2 MQDs (N, P-Ti 3 C 2 MQDs) were synthesized via facile microwave-assisted method, which greatly reduces the reaction time. The as-prepared N, P-Ti 3 C 2 MQDs showed excitation-dependent photoluminescence , anti-photobleaching, and favorable dispersibility . Interestingly, the fluorescence of N, P-Ti 3 C 2 MQDs can be quenched by 1,10-phenanthroline-Fe (II) complex (Phen-Fe 2+ ) via inner filter effect (IFE), accompanied by the increased orange color. After introduction of nitrite (NO 2 - ), owing to the redox reaction between NO 2 - and Fe 2+ , the fluorescence will be recovered and the color varies from orange to colorless gradually. Therefore, a colorimetric/fluorometric dual-modal recognition of NO 2 - was fabricated based on N, P-Ti 3 C 2 MQDs and Phen-Fe 2+ complex. Moreover, paper-based test trips were facilely made by the N, P-Ti 3 C 2 MQDs/Phen-Fe 2+ sensing system in response to ultrafast-response, real-time detection of NO 2 - with the assistant of smartphone. This study tendered a novel dual-channel method for real-time visual assay of NO 2 - as well as provided insightful research into functionalized Ti 3 C 2 MQDs regarding in food analysis.
研究领域:
材料科学
·
分析化学
·
纳米技术
·
环境科学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）