ENERGY & FUELS
·
2018
·
IF 3.024
Qing-ying Li,Yingzhou Lu,Hong Meng,Chunxi Li
CuSiF6(4,4′-bipyridine)2 (SIFSIX-1-Cu) is a crystalline complex of CuSiF6 and 4,4′-bipyridine with rich microporosity, high specific area (∼1100 m2·g–1), and negligible hydroscopicity. Furthermore, this complex can be synthesized and dried under much milder conditions compared with conventional MOFs. In this paper, three complexes, SIFSIX-1-Cu(1), SIFSIX-1-Cu(2), and SIFSIX-1-Cu(3), were prepared using Cu(BF4)2, Cu(NO3)2, and CuSO4, respectively, as the copper sources, and their structure was characterized by SEM, XPS, XRD, and N2-adsorption desorption measurements. The adsorptivity of these compounds for dibenzothiophene (DBT) in model oil follows the order of SIFSIX-1-Cu(1) > SIFSIX-1-Cu(2) > SIFSIX-1-Cu(3), which is consistent with the order of their crystallinity and specific areas. The adsorption amount of SIFSIX-1-Cu(1) is 49.5 mg-S·g–1 for DBT model oil at an equilibrium sulfur concentration of 700 ppm and 303.15 K, and follows the order of DBT > benzothiophene (BT) > 3-methylthiophene (3-MT) for other sulfur compounds. The adsorptive desulfurization performance of SIFSIX-1-Cu is one of competitive sorbents among MOFs. The used sorbent can be regenerated easily by methanol washing and can be reused with an approximately 11% loss of adsorption capacity after five cycles. This study reveals the potential application of microporous crystal complexes for fuel desulfurization.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2025
·Vol. 15
·期 1
·70
·
IF 2.4
Xiaoming Zhang,Yejia Huang,Jinliang Li,Yiying Chen,Jialing Lian
Paracetamol-4,4′-bipyridine cocrystals were synthesized using a solution method, reflux method, grinding method, and ultrasonic method. The structures and properties were characterized through the utilization of single-crystal X-ray diffraction (SXRD), powder X-ray diffraction (PXRD), polarized light microscopy (PLM), thermogravimetric analysis (TGA), elemental analysis (EA), and infrared spectroscopy (IR). The results show that the four methods synthesized different cocrystal morphologies, but the same structure and properties coupled with a notably high purity level. All featured strong hydrogen bonds formed between the paracetamol,4,4′-bipyridine and water molecules. An additional notable feature is the presence of π...π stacking interactions between the pyridine rings of adjacent 4,4′-bipyridine molecules. The solubility of paracetamol (active pharmaceutical ingredient, API) and the cocrystal was measured and discussed. In the dissolution experiment, the cocrystal showed a much faster dissolution rate than the API in simulated gastric fluid media (pH = 1.2). Furthermore, the pharmacokinetic (PK) behavior of the cocrystal and the API was investigated to evaluate the effectiveness of this strategy for enhancing the oral absorption of paracetamol. The in vitro and in vivo studies revealed that the paracetamol-4,4′-bipyridine cocrystal possessed an excellent dissolution behavior and an improved pharmacokinetic profile.
研究领域:
药物化学
·
药剂学
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DOI
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2018
·Vol. 48
·期 10
·1121-1129
·
IF 2.262
Zhu Chun-Rong,Long Jun-Fei,Tang Qian,Gong Cheng-Bin,Fu Xiang-Kai
Abstract This paper aims to develop a multi-colored electrochromic device based on mixed mono- and bi-substituted 4,4′-bipyridine derivatives containing an ester group. A series of these derivatives were synthesized, and their electrochemical and electrochromic properties were studied through cyclic voltammetry and ultraviolet–visible spectroscopy. The mono- and bi-substituted 4,4′-bipyridine derivatives containing an ester group displayed different onset bias and colored state. Mono-substituted 4,4′-bipyridine derivatives showed a magenta colored state at an onset bias of − 1.3 V; bi-substituted 4,4′-bipyridine derivatives showed violet colored states at an onset bias of − 0.8 V. A multi-colored electrochromic device was achieved by mixing mono- and bi-substituted 4,4′-bipyridine derivatives as the electrochromic layer. Graphical Abstract
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
iScience
·
2024
·
IF 4.6
Xia Long,Wangping Xu,Tingting Duan,Liyan Lin,Yandong Guo,Xiaohong Yan,Juexian Cao,Yong Hu
Understanding and tuning charge transport in molecular junctions is pivotal for crafting molecular devices with tailored functionalities. Here, we report a novel approach to manipulate the absorption configuration within a 4,4′-bipyridine (4,4′-BPY) molecular junction, utilizing the scanning tunneling microscope break junction technique in a concentration-dependent manner. Single-molecule conductance measurements demonstrate that the molecular junctions exhibit a significant concentration dependence, with a transition from high conductance (HC) to low conductance (LC) states as the concentration decreases. Moreover, we identified an additional conductance state in the molecular junctions besides already known HC and LC states. Flicker noise analysis and theoretical calculations provided valuable insights into the underlying charge transport mechanisms and single-molecule absorption configurations concerning varying concentrations. These findings contribute to a fundamental comprehension of charge transport in concentration-dependent molecular junctions. Furthermore, they offer promising prospects for controlling single-molecule adsorption configurations, thereby paving the way for future molecular devices.
研究领域:
物理化学
·
纳米科技
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2023
·Vol. 27
·期 4
·e202300575
·
IF 2.3
Danxiao Wang,Chunfeng Sun,Yanxia Wang
Graphical Cd-PLA was successfully synthesized with Cd (NO 3 ) 2 using flexible dicarboxylic acid and 4,4 ′-bipyridine as co-ligands. The bpy-containing ligand in Cd-PLA could enhance its photo-adsorption capacity. This enabled Cd-PLA presented high performance for photocatalysis of the benzylamine coupling reaction with high conversion rate and selectivity under mild conditions. This work can provide a new approach to design MOFs based on flexible ligands with photocatalytic activity. MOFs (Metal organic frameworks) have diverse structures that present great potential for light capture and light conversion. Therefore, MOFs are widely used in the study of photocatalysis. However, there still are some challenges in photocatalytic organic conversion upon MOFs under mild conditions, such as poor light absorption performance. Here, we successfully synthesized a new Cd-connected two-dimensional MOF by a simple hydrothermal method, termed [Cd(PLA)(4,4’-bipy) 0.5 ]⋅(DMF) (Cd-PLA) (PLA= phenylene-diacetic acid, 4,4’-bipy= 4,4’-bipyridine and DMF= N,N’-dimethyl formamide). The bpy-containing Cd-PLA possesses excellent light harvest ability and suitable photocatalysis energy potential, allowing it to be a remarkable photocatalyst with highly efficiency and selectivity for the photo-oxidation of benzylamine. This work provides an efficient, economical, and green way for oxidation of amines to produce imines under ultraviolet light irradiation.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF POROUS MATERIALS
·
2014
·Vol. 21
·期 5
·691-697
·
IF 1.316
Zhao Huayi,Shi Qian,Xiao Hongping,Li Xinhua
A metal–organic gels containing Ag(4,4′-bipyridine)NO 3 metal–organic framework and 4,4′-bipyridine units were hydrothermally synthesized using excess 4,4′-bipyridine ligand as building units. The metal–organic gels structure was characterized by various spectroscopic methods and a mechanism of assembly was discussed on the basis of the obtained data. The metal–organic gels retained the characteristics of both the metal–organic framework and gels; furthermore, the reversible hydration/dehydration, reversible anion exchange, and responsive properties were also investigated.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
ELECTROANALYSIS
·
2022
·Vol. 35
·期 4
·e202200352
·
IF 3.077
Lan Zhang,Yawen Kong,Xinchu Wang,Yujie Zhang,Debao Xiao
The electrochromic detection of latent fingermarks on polished or unpolished, flat or curved metal surfaces is described using electrochromic material, 1,1’-dibenzyl-4,4’-bipyridinium dichloride. The surface area covered by fingermarks acts as an insulating mask, causing 1,1’-dibenzyl-4,4’-bipyridinium dichloride to change color and produce inversed images of the fingermark. By changing the applied potential, the optical properties of 1,1’-dibenzyl-4,4’-bipyridinium dichloride can be continuously and reversibly adjusted to optimize the visual contrast of fingermarks, so as to realize the detection of latent fingermarks on stainless steel surface. It is demonstrated that the fabricated electrochromic devices can detect the fingermarks on these types of surfaces within twenty seconds at −1.0∼−2.0 V. This work can qualify as a tangible improvement in fingermark detection of the natural fingermarks on the never-cleaned (more than 3 years) and curved surfaces of daily-used container, e. g. cup, and the handle of cleaning tool, mop.
研究领域:
法医学
·
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 29
·期 29
·1902079
·
IF 15.621
Guangjun Zhang,Xiaopeng Xu,Young Woong Lee,Han Young Woo,Ying Li,Qiang Peng
Two novel perylene diimide (PDI)–based derivatives, Alq 3 -PDI and Alq 3 -PDI 2, are synthesized by flanking a 3D tri(8-hydroxyquinoline)aluminum(III) (Alq 3 ) core with PDI and a helical PDI dimer (PDI2) to construct high-performance small molecular nonfullerene acceptors (SMAs). The 3D Alq 3 core significantly suppresses the molecular aggregation of the resulting SMAs, leading to a well-mixed blend with a PTTEA donor polymer and weak phase separation. Compared with Alq 3 -PDI , the extended π-conjugation of Alq 3 -PDI2 results in higher-order molecular packing, which improves the absorption and phase separation behavior. Thus, the Alq 3 -PDI2 devices have higher J sc and FF values and better device performance, which are further enhanced by a small amount of 4,4′-bipyridine (Bipy) as an additive. The coordination between Bipy and the Alq 3 core promotes molecular packing and phase separation, which lower charge recombination and enhanced charge collection in the resulting devices. Therefore, a largely improved J sc of 15.74 mA cm −2 and very high FF of 71.27% are obtained in the Alq 3 -PDI2 devices, resulting in a power conversion efficiency of 9.54%, which is the best value reported for PDI-based polymer solar cells. The coordination can also serve as a “molecular lock,” which prevents molecular motion and thus improves device stability.
研究领域:
材料科学
·
有机光电子学
·
太阳能电池技术
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2025
·
IF 26
Chunjie Huang,Zhenghao Liu,Shiyu Jiang,Xiangjin Du,Chengyu Tan,Xinru Qin,Yuqi Cui,Rui Zhang,Yiming Li,Fubo Tian,Jiangjian Shi,Huijue Wu,Yanhong Luo,Dongmei Li,Qingbo Meng
Large area, dense, and uniform SnO 2 films with fewer defects are essential for high-quality perovskite films and efficient n-i-p typed perovskite modules. In this respect, based on the self-synthesized SnO 2 nanoparticles (NPs) 4,4′-bipyridine is introduced as a multifunctional interface modifier at the SnO 2 /perovskite interface. Both experimental and DFT calculation results reveal that, the incorporation of 4,4′-bipyridine can simultaneously passivate interfacial defects from the SnO 2 surface and perovskite bottom surface. Moreover, it can also facilitate charge carrier transportation. Based on blade-coating technique for large area perovskite modules, this strategy significantly enhances the interfacial quality of large-area SnO 2 films and crystal quality of large-area perovskite layers. As a result, the champion small-area cell (0.076 cm 2 ) presents the efficiency of 25.75% while the minimodule (22.9 cm 2 aperture area) exhibits the efficiency of 23.50% with a certified efficiency of 22.70%. Both small-area devices and modules exhibited excellent operation and thermal stabilities, demonstrating that this interface treatment is a promising approach for large-scale production of high-efficiency perovskite modules.
研究领域:
材料科学
·
纳米技术
·
光伏技术
·
薄膜技术
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Huan Fu,Chengjian Zhang,Hui Wang,Binyang Du,Jingjing Nie,Junhui Xu,Liuping Chen
Polymer-based aqueous redox flow batteries (RFBs) have emerged as a promising technology for large-scale energy storage. The development of novel polymeric electrode materials with high aqueous solubility to enhance the capacity and stability of batteries is the foremost concern of this area, yet remains challenging. Here we describe a stable polymer-based aqueous RFB assembled in air atmosphere, which uses a low-cost anionic terpolymer ( P4 ) as the active cathode material , N , N ′-dimethyl-4,4′-bipyridinium dichloride ( MV ) as the anode material , and environmentally benign aqueous NaCl solution (NaCl aq ) as the electrolyte. P4 exhibits high solubility (28.8 Ah L −1 ) and low viscosity in 1.5 M NaCl aq . The theoretical storage capacity of such stable RFB is as high as 12 Ah L −1 . At the current density of 10 mA cm −2 and over 170 consecutive cycles in air atmosphere at room temperature , the P4/MV RFB exhibits the actual energy density of 6.43 Wh L −1 , the material utilization of 71.3%, Coulombic efficiency over 95%, and the average attenuation per cycle of 0.12%.
研究领域:
能源存储
·
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2018
·
IF 2.179
Yan Li,Deyun Ma,Chanchan Chen,Minchun Chen,Zhanhong Li,Yetao Wu,Shanshan Zhu,Guo Peng
A hydrostable and bromine-functionalized MOF with a sxd topology constructed from tetranuclear clusters, {[Mn 2 (Bript) 2 (4,4'-bpy) .5 (DMF)]·(H 2 O)} n ( 1 ) (H 2 Bript = 4-Bromoisophthalic acid, 4,4'-bpy = 4,4'-bipyridine, DMF = dimethylformamide) was synthesized and structurally characterized. TGA and PXRD results show high thermal and water stability for the framework. 1 displays a 3D framework with the channel of 4.6 × 4.6 Å 2 along the c axis. The framework exhibits a reversible and highly selective luminescent sensing function with respect to Hg 2+ cation. Magnetic measurements reveal that the presence of weak antiferromagnetic couplings between the four Mn(II) ions in 1 .
研究领域:
材料科学
·
化学
·
纳米技术
·
分析化学
·
磁学
✓ 已验证
产品关联
DOI
高影响因子
TRANSITION METAL CHEMISTRY
·
2016
·Vol. 41
·期 5
·489-498
·
IF 1.465
Liang Fenglan,Lu Kuan,Yan Jingjing,Lin Weijie,Ding Wanqiu,Lu Husheng,Lin Dongting,Sakiyama Hiroshi,Ma Deyun,Qin Liang
The reactions of aromatic dicarboxylic acids and methyl-functionalized 4,4′-bipyridine ligands with metal salts under hydrothermal conditions generated four structurally diverse cobalt(II), zinc(II) and cadmium(II) coordination polymers, [Co(CH 3 -BDC)(dmbpy) 0.5 ]
n
( 1 ), [Cd(OH-HBDC) 2 (dmbpy)]
n
( 2 ), [Zn(NDC)(dmbpy)]
n
, ( 3 ) and {[Cd(DBA)(dmbpy) 0.5 ]·2H 2 O}
n
( 4 ) (CH 3 –H 2 BDC = 5-methylisophthalic acid, OH–H 2 BDC = 5-hydroxyisophthalic acid, H 2 NDC = 1,4-naphthalenedicarboxylic acid, H 2 DBA = 4,4′-methylenedibenzoic acid, dmbpy = 2,2′-dimethyl-4,4′-bipyridine). All four complexes have been structurally characterized by X-ray crystallography. Complex 1 shows a 3D jsm topology structure with two 1D channels parallel to the a and b axes. Complex 2 has a zigzag chain in which the OH-HBDC ligands point alternately up and down. Complexes 3 and 4 show 2D (4,4) networks when the dinuclear metal centers and their ligands are regarded as nodes and linkers, respectively. Complex 3 also shows twofold interpenetration with 1D channels along the b axis. Two nets of complex 4 interlock in parallel, giving rise to a polycatenated layer (2D → 2D). Thermogravimetric and chemical stabilities, magnetic and luminescent properties of these complexes were investigated.
研究领域:
无机化学
·
材料科学
·
晶体学
✓ 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）