INORGANICA CHIMICA ACTA
·
2021
·
IF 2.545
Xingliang Li,Juncai Lu,Wanjun Mu,Baihua Chen,Daibing Luo,Bijun Liu,Yanqiu Yang,Hongyuan Wei,Shuming Peng
Nitrilotri–3–propanoic Acid (NTPA) and Tris(2–carboxyethyl) phosphine (TCEP) possess similar skeleton. This pair of isostructural ligands is a perfect set to assess the differences of uranyl (UO 2 2+ ) complexes with N–tricarboxylate versus P–tricarboxylate. The protonation reactions of NTPA and TCEP were investigated by potentiometry and calorimetry. Complexation of uranyl with the both ligands was studied by potentiometry and structural analysis. The results indicate that central trialkylamine in NTPA has a higher affinity for the proton than trialkylphosphine in TCEP. Crystal structures and NMR analyses indicate that central amine of NTPA and central phosphine of TCEP are not involved in the bonding. NTPA/UO 2 2+ complex is more stable than TCEP/UO 2 2+ complex. This difference cannot be explained by electronic effect of central N and P atoms because of nonbonding interactions. The higher stability of UO 2 2+ /NTPA versus UO 2 2+ /TCEP may be due to the fact that the central N atom of NTPA has a lower steric hindrance than the central P atom of TCEP. Another possible reason is that UO 2 2+ /TCEP complexes have different coordination modes from UO 2 2+ /NTPA complexes.
研究领域:
化学
·
配位化学
·
核化学
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Yan Chen,Chunli Hu,Zhi Fang,Jianggao Mao
The first metal carboxylate-cyanurates, namely, K(H3C3N3O3)(HCO2) (I) and Ba2(H2C3N3O3)(CH3CO2)3(H2O) (II), which contain π-conjugated carboxylate and cyanurate groups, have been synthesized by hydrothermal methods. They crystallize in centrosymmetric space groups of P1̅ and P21/n, respectively. Compound I exhibits a novel three-dimensional (3D) structure based on a [K(H3C3N3O3)]+ cationic framework with 12-membered ring (12-MR) channels, and the (HCO2)− anions are located within the 12-MR channels. The [K(H3C3N3O3)]+ cationic framework is composed of K+ ions interconnected by H3C3N3O3 ligands. Compound II features a 3D network formed by [Ba2(CH3CO2)3]+ cationic double chains bridged by (H2C3N3O3)− anions. The [Ba2(CH3CO2)3]+ cationic double chain is composed of (CH3CO2)− anions and Ba2+ ions. Optical property measurements show that both compounds exhibit short ultraviolet cutoff edges (I, 208 nm; II, 218 nm) and wide band gaps (I, 5.43 eV; II, 5.20 eV). Importantly, K(H3C3N3O3)(HCO2) (I) features a large birefringence of 0.285@532 nm due to the parallel alignment of π-conjugated H3C3N3O3 and (HCO2)− groups, indicating that K(H3C3N3O3)(HCO2) (I) is a promising short-wave ultraviolet birefringent material. Detailed theoretical calculations elucidate that their excellent optical properties originate from the synergetic effect of both types of π-conjugated groups.
研究领域:
材料科学
·
光学
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DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2018
·
IF 2.795
Qingwu Long,Jiaqi Huang,Shu Xiong,Liang Shen,Yan Wang
FO technology has attracted growing attention in water treatment and desalination applications recently. The development of a suitable draw solute with high performance and low cost is therefore in high demand to facilitate practical FO applications. In this study, two oligomeric carboxylates — poly maleic acid sodium (PMAS) and poly(itaconate-co-acrylate) sodium [P(IA-co-AA)] with controllable molecular weights of 400–1000 Da, are synthesized via one-step polymerization and employed as novel draw solutes for FO applications. The successful synthesis is confirmed via by various characterization techniques. The osmotic pressure, relative viscosity and FO performance of PMAS and P(IA-co-AA) draw solutions with different concentrations are studied systematically. Two types of FO membranes are employed, and their performance is compared using PMAS draw solution. With 0.5 mol/kg PMAS draw solution and DI water feed solution, high water fluxes of 30.6 and 62.4 LMH can be achieved using HTI-TFC and homemade PSf-TFC membrane in the FO tests, respectively. 0.5 mol/kg PMAS draw solution is further studied for the desalination of 0.6 mol/kg NaCl solution via FO, with a water flux of 6.63 LMH obtained. The diluted PMAS solution after FO test can be recovered by nanofiltration with a high rejection rate. The excellent performance and available recovery route of the developed oligomeric carboxylates imply their great potential as promising draw solutes for FO applications.
研究领域:
水处理
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材料科学
·
环境工程
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产品关联
DOI
高影响因子
Metals
·
2016
·Vol. 6
·期 8
·176
·
IF 1.574
Yongli Li,Zhuan Hu,Jinqing Kan
Zinc is widely used as a negative electrode material for batteries due to its excellent electrochemical properties. Zinc is prone to corrosion and the formation of zinc dendrites cause short circuits of the battery, which leads to reduced battery capacity and shortens the battery’s life, hindering its use in weak acidic electrolytes (for example, aqueous Zn-polyaniline batteries). The effects of carboxylates (sodium formate, sodium acetate, sodium propionate, sodium butyrate, sodium valerate, disodium malonate, and disodium succinate) and their concentrations on zinc electrode performance were studied with electrochemical methods to improve the zinc electrode activity for long-life Zn-polyaniline batteries. It was found that the ability of inhibiting corrosion of the zinc electrode is better in the aqueous electrolyte containing 0.2 M disodium malonate. The charge/discharge performance of a Zn-polyaniline battery electrodeposited with polyaniline on a carbon substrate is carried out in the aqueous electrolyte. the results show that the initial discharge specific capacity of the polyaniline in the Zn-polyaniline battery is as high as 131.1 mAh·g−1, and maintains a discharge specific capacity of 114.8 mAh·g−1and a coulombic efficiency over 92% after 100 cycles at a charge/discharge current density of 1 A·g−1in the voltage range of 1.5–0.7 V.
研究领域:
电化学
·
材料科学
✓ 已验证
DOI
高影响因子
Polymers
·
2023
·Vol. 15
·期 14
·3139
·
IF 5
Junqi Wang,Ruiqing Liu,Bo Wang,Zhigang Cheng,Chengkun Liu,Yiwen Tang,Junfeng Zhu
Heavy oil exploitation needs efficient viscosity reducers to reduce viscosity, and polyether carboxylate viscosity reducers have a significant viscosity reduction effect on heavy oil. Previous work has studied the effect of different side chain lengths on this viscosity reducer, and now a series of polyether carboxylate viscosity reducers, including APAD, APASD, APAS, APA, and AP5AD (the name of the viscosity reducer is determined by the name of the desired monomer), with different electrical properties have been synthesized to investigate the effect of their different electrical properties on viscosity reduction performance. Through the performance tests of surface tension, contact angle, emulsification, viscosity reduction, and foaming, it was found that APAD viscosity reducers had the best viscosity reduction performance, reducing the viscosity of heavy oil to 81 mPa·s with a viscosity reduction rate of 98.34%, and the worst viscosity reduction rate of other viscosity reducers also reached 97%. Additionally, APAD viscosity reducers have the highest emulsification rate, and the emulsion formed with heavy oil is also the most stable. The net charge of APAD was calculated from the molar ratio of the monomers and the total mass to minimize the net charge. While the net charge of other surfactants was higher. It shows that the amount of the surfactant’s net charge affects the surfactant’s viscosity reduction effect, and the smaller the net charge of the surfactant itself, the better the viscosity reduction effect.
研究领域:
石油工程
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Hanxiao Wang,Zhaotie Liu,Zhongwen Liu,Jinqiang Jiang,Guo Li
An extendable double network design for hydrogels with programmable external geometries and actuating trajectories is presented. Chemically cross-linked polyacrylamide as the first network penetrated with linear alginate chains is prepared for demonstration. The coordination of Fe3+ ions with carboxylate groups in alginate chains acts as the second network, and its dissociation through photoreduction is utilized to realize the photoresponsive shape memory property; the shape fixity ratio and shape recovery ratio both exceed 90%. The gradient dissociation of Fe3+-carboxylate coordination under UV facilitates 3D programming of hydrogel geometry. On another aspect, the resulted cross-linking gradient differentiates the extent and rate of solvent-induced volume change of the PAAm network, endowing the hydrogel with photo-programmable solvent-driven actuating behavior. Furthermore, by inducing the formation of Fe3+-carboxylate coordination within the entire network for shape programming and cross-linking gradients in specific regions as active joints, hydrogels with designed actuating behaviors based on specific 3D shapes are realized. The shape memory and active morphing functionalities enabled by photo-dissociable Fe3+-carboxylate coordination in PAAm hydrogel can be generally extended to other hydrogels.
研究领域:
材料科学
·
化学工程
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Tingting Yan,Mingzhu Yang,Binglei Song
Carboxylate surfactants have excellent properties, including low irritancy and biocompatibility. However, the solubility of carboxylate surfactants is usually low at ambient temperatures, which limits their applications in many fields. Introducing a hydrophobic branch is an effective strategy to disrupt molecular packing, thereby enhancing solubility and promoting advanced self-assembly behavior. Herein, by introducing p-tert-butylphenoxy groups at the α-position of sodium laurate, sodium myristate, and sodium palmitate respectively, a series of carboxylate surfactants (abbreviated as C n -p-(t-bu)ph-Na, n = 12, 14, 16) were synthesized. These surfactants exhibit high water solubility and excellent self-assembly capability. Among them, C 12 -p-(t-bu)ph-Na achieved a solubility of 207.7 mmol∙L -1 at 25 °C, with Krafft points below room temperature. X-ray diffraction (XRD) analysis indicated that the bulky substituent induced a tilted, less compact molecular packing in the solid state. Surface tension measurements showed that the critical micelle concentration ( cmc ) was reduced by more than one order of magnitude compared to conventional carboxylates, with the surface tension at cmc ( γ cmc ) reduced to approximately 28 mN·m -1 . Rheological analysis and cryo-TEM confirmed that C 12 -p-(t-bu)ph-Na and C 14 -p-(t-bu)ph-Na formed entangled wormlike micelles without additives, imparting pronounced viscoelasticity. These findings establish rigid hydrophobic branching as a simple and effective design strategy for developing bio-based surfactants with tunable solubility and dynamic aggregation behaviors, offering new opportunities in controlled release, personal care, and advanced soft materials.
研究领域:
化学
·
材料科学
·
生物学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULES
·
2018
·
IF 5.914
Airong Xu,Lin Chen,Jianji Wang
Developing cellulose-based products is highly important because of their low-cost, reproducibility, and biodegradability. However, extensive application for cellulose has been actually hindered due to its well-known insolubility. Herein, some 22 novel functionalized imidazalium carboxylates exhibit tremendously enhanced dissolution capacity for cellulose even without extra energy consumption and are much superior to the previously reported solvents so far. Systematic investigations reveal that the powerful dissolution capacity for cellulose mainly results from the contribution of the imidazolium skeleton cation, not replacing acidic H atoms in imidazolium skeleton by alkyl, binding more allyl in N atoms of imidazolium cation, and binding an electron-donating group in carboxylate anion. Of particular importance, porous cellulose materials with varying micromorphology, for the first time, are reported by tuning the anionic and/or cationic structures of an IL. Moreover, the regenerated cellulose material retains sufficient thermostability and chemical structure. Therefore, this investigation provides a viable strategy for practical application in cellulose conversion into valuable products even without extra heating.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Zhang Xinyan,Luo Laihao,Liu Chunxiao,Xue Weiqing,Ji Yuan,Zhao Donghao,Liu Pengbo,Feng Xinran,Luo Jun,Jiang Qiu,Zheng Tingting,Li Xu,Xia Chuan,Zeng Jie
Next-generation techniques for sustainable carboxylate production generate carboxylate salts as the primary outcome. To circumvent the costly conversion of carboxylate salts to acids, we demonstrate the aqueous (non-)Kolbe electrolysis process as an alternative strategy to generate downstream value-added chemicals. Upon revealing the irreversible oxidation-induced charge transfer inhibition on the graphite anode, we propose an anion intercalation strategy to mitigate the stability problem induced by the ever-increasing overpotential. In acetate decarboxylation, we observe a high Faradaic efficiency of ~95% for non-Kolbe products (methanol and methyl acetate) at wide current densities ranging from 0.05 to 1 A cm −2 and long-term stability at current densities of 0.15 and 0.6 A cm −2 for 130 and 35 h, respectively. We also extended this strategy for the upgrading of long-chain carboxylates such as propionate, butyrate, and succinate. Our work provides valuable guidance for carboxylate upgrading and extendable strategy for overcoming passivation challenges in catalysis.
研究领域:
化学
·
环境科学
·
催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Research
·
2024
·Vol. 17
·期 12
·10661-10668
·
IF 9.5
Luo Li,Zhou Xiaolan,Xu Xiaozhi,Zhao Zhuo,Pu Chaodan
The impact of alkali metal carboxylates on the synthesis of colloidal quantum dots (CQDs) was investigated. Through a ligand removal experiment, we demonstrated that due to its high hydrophilic nature, sodium oleate dispersed in n-octadecene (ODE) with the formation of micelles with the help of other polar molecules, which resulted in reduced concentration of oleic acid and cadmium oleate both in the solution and on the surface of CQDs. These effects allow for control the size of CdSe CQDs in a wide range when synthesizing them by solely changing the amount of sodium oleate, under either cation-rich or anion-rich conditions. Additionally, enhanced ligand dynamics promote morphology transformation and suppress size deviation caused by different morphologies’ existence in CQDs synthesis. Alkali metal oleate not only stabilized anion-rich CdSe CQDs but also results in highly crystallized wurtzite structure of CdSe CQDs when synthesizing them with excess anions. Furthermore, under anion-rich synthetic condition, anisotropic growth can be realized, leading to nanorods and nanoplatelets based on the alkali metal ions used. Given their outstanding effects and widely applicable synthetic conditions, alkali metal carboxylates offer new possibilities for designing efficient methods for synthesizing CQDs.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Jianing Li,Qiancheng Zhang,Juming Liu,Mengran Yu,Huiyan Ma,Jucai Yang,Sheng Ye,Tomas Ramirez Reina,Jian Liu
It still remains challenge for expanding the photo-response range of TiO 2 with dominant {0 0 1} facets due to the hardly achieving modification of the electronic structure without destroying the formation of TiO 2 high energy facets. Herein, we report the construction of carboxylate species modified TiO 2 nanosheets with dominant {0 0 1} facets by employing ethanol as a carbon source through a low-temperature (300 °C) carbonization method. The as-obtained samples were investigated in detail by using various characterization techniques. The results indicate that the carboxylate species derived from the oxidation and carbonization of ethanol are coordinated to the {0 0 1} facets in a bidentate bridging mode. The electron-withdrawing carboxylate species induce TiO 2 to form a lower valence band edge and a narrower bandgap, which enhances the oxidation ability of photogenerated holes and expands the photo-response range. The partially carbonized carboxylate species can also act as a photosensitizer to induce visible-light photocatalytic activity of TiO 2 nanosheets. In addition, the carboxylate species can further promote the separation of photogenerated charge carriers. The findings of this work may provide a new perspective for tuning the band structure of TiO 2 with dominant {0 0 1} facets and improving its photocatalytic performance.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
·
2022
·
IF 5.062
Duanxiu Li,Jiong Li,Zongwu Deng,Hailu Zhang
Supramolecular synthon strategy is an often-employed principle to guide the discovery of novel pharmaceutical cocrystals. The amine–carboxylate (N–H··· ― OOC) intermolecular interaction has been confirmed as a member of the supramolecular toolbox, and a cocrystal of 5-fluorocytosine (FC) with L -proline (FC– L -PRO) containing this heterosynthon was previously harvested. Herein, two new cocrystals of FC with sarcosine (SAR) or dimethylglycine (DMG) were successfully screened out. Similar to FC– L -PRO, the N–H··· ― OOC synthon presents as the most important hetero-molecular interaction between FC and SAR/DMG in their crystal structures. And the FC molecular ribbons via homo-molecular N–H⋯N and N–H⋯O hydrogen bonds were observed in all of the cocrystal structures, which also exist in the structure of FC. Theoretical calculations show that the formations of FC– L -PRO and FC–DMG are thermodynamically favorable. While for FC–SAR–MeOH, the calculated result is not applicable. The coformer competitive experiments reveal that FC– L -PRO and FC–DMG have similar relative stability and FC–SAR–MeOH is the relative unstable form. These cocrystals exhibit weakened physical stability under high humidity condition (75% RH), then should be stored in controlled humidity conditions (≤50% RH). Additionally, FC– L -PRO demonstrates reduced intrinsic dissolution rate (IDR) in pH 1.2 medium (simulated gastric fluid), which may provide positive contribution to alleviate its toxic side effects.
研究领域:
药物化学
·
晶体学
·
超分子化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）