INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Xiao Xiao,Long Li,Zhuang Wang,Qiao Yu,Xuanhao Huang,Xingyue Liu,Qingjiang Pan,Songdong Ding
Five amine-diamide ligands (DAMIA) with varying alkyl chain lengths and steric hindrances are developed for selective extraction of Am3+ over Eu3+ in high-acidity HNO3 solution with the aim of understanding the structure–activity relationship. The ability of these ligands to extract metal ions is closely related to their basicity. The weaker the basicity is, the stronger the extraction ability is. The substituent on the aminic N has more significant effect on the extraction ability than that on the amidic N. Among the five ligands, the DAMIA containing five branched 2-ethylhexyl substituents demonstrates the highest extraction ability and selectivity at molar acidity level. Slope analysis suggests the formation of a 1:1 metal/ligand extracted species, which is also supported by the results obtained from the UV–vis spectrophotometric titration. Furthermore, the analyses of Fourier transform infrared (FT-IR), time-resolved laser-induced fluorescence spectroscopy (TRLFS), and X-ray photoelectron spectroscopy (XPS) for the extracted complex indicate that one Eu3+ ion may be nine-coordinated by one ligand molecule in a tridentate manner via two amide O atoms and one tertiary amine N atom and three bidentate NO3– ions. There is no H2O molecule in the inner coordination sphere of central Eu3+. Additionally, based on the studies of solvent extraction and complexation, the extraction of metal ions follows the neutral complexation extraction model, and the corresponding thermodynamic parameters (ΔH, ΔS, and ΔG) are also presented.
研究领域:
化学
·
核化学与放射化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
·
2024
·
IF 1.3
Liang Limei,Wu Minghui,Huang Pengmian,Liu Jiyong
This work is based on the precursor compound cyproflanilide and designs a series of methoxy containing meta-diamine compounds. By replacing the fluorine atom on the phenyl ring in cyproflanilide with methoxy group, 17 derivatives (12a-12q) were obtained with yields ranging from 46 to 92%, which were characterized by high-resolution mass spectrometry, and nuclear magnetic resonance (1H and 13C) spectroscopy and infrared. The insecticidal activities were evaluated against the Plutella xylostella and Spodoptera frugiperda. Compound N-(3-((2-bromopropane-4-(perfluoropropan-2-yl))-6-(trifluoromethyl)phenyl)methoxyphenyl)-N-(cyclopropylmethyl)-6-fluoronicotinamide (12q) showed significant insecticidal activity against the Plutella xylostella with a mortality rate of 97.67% at a concentration of 1 mg L-1. It also exhibited moderate activity against the Spodoptera frugiperda at a concentration of 0.1 mg L-1, which can be used as a template for structure modification to obtain higher insecticidal activity.
研究领域:
农药化学
·
有机合成
·
农业昆虫学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Long Li,Xuanhao Huang,Xiaoyang Hu,Xingyue Liu,Rui Li,Hang Zhou,Fengfeng Li,Fangxiang Luo,Qingjiang Pan,Songdong Ding
Efficient and selective extraction of pertechnetate (TcO 4 − ) from nitric acid medium has become a significant challenge, especially in the presence of a large excess of interfering anions. By employing a combined strategy involving H-bonding and electrostatic interaction, a highly selective extraction of TcO 4 − can be achieved. The present work reports three homologous amine-diamide ligands with different alkyl chain lengths on the amine N atom of 2,2′-(metylimino)bis( N , N -dioctylacetamide) (MIDOA), 2,2′-(butylimino)bis( N , N -dioctylacetamide) (BIDOA) and 2,2′-(octylimino)bis( N , N -dioctylacetamide) (OIDOA), and their extraction behaviors for TcO 4 − /ReO 4 − in HNO 3 solution are also investigated by using n -dodecane as a diluent. It has been shown that all of them exhibit excellent extractability and high selectivity to TcO 4 − /ReO 4 − . Their extractability and phase disengagement follow the order of OIDOA > BIDOA > MIDOA, revealing a greater extractability and rapider phase disengagement for the amine-diamide ligand with longer chain substituents on the amine N atom. Both slope analysis and loading capacity test indicate the formation of 1:1 metal/ligand extracted complex, which is also confirmed by the analyses of single-crystal X-ray diffraction (SC-XRD), electrospray ionization mass (ESI-MS), Fourier transform infrared (FT-IR), and X-ray photoelectron spectroscopy (XPS). The extraction of TcO 4 − /ReO 4 − by the amine-diamide ligand follows the anion exchange extraction model and is a spontaneous and endothermic process. Furthermore, a competing extraction test was also conducted and demonstrates excellent extractability and high selectivity to TcO 4 − /ReO 4 − .
研究领域:
化学
·
核化学与放射化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SOLVENT EXTRACTION AND ION EXCHANGE
·
2021
·
IF 2.513
Yifu Hu,Chuan Lu,Qi Chen,Yaoyang Liu,Yu Zhou,Caishan Jiao,Meng Zhang,Hongguo Hou,Yang Gao,Guoxin Tian
In this paper, pertraction of Nd(III) and U(VI) from nitric acid media through a flat-sheet supported liquid membrane (FSSLM) was studied by using a self-made liquid membrane device, respectively, with N, N’-dimethyl-N, N’-dioctyl-3-oxadiglcolamide (DMDODGA) diluted in 40/60 (V/V)% n-octanol/kerosene as the carrier. The effects of various factors, such as the acidity of the feed and stripping phases, neodymium concentration, uranium concentration, DMDODGA concentration are discussed. The optimized conditions for Nd(III) transport were found to be 3 M HNO3 in the feed phase, 0.5 M HNO3 in the stripping phase, 0.48 M DMDODGA in n-octanol/kerosene as the carrier. When the initial concentration of Nd(III) was 1 × 10−4 mol/L, the transport rate of Nd(III) was 86.4(±2.2)%. Compared with Nd(III), the liquid membrane was less effective in the transport of U(VI), the highest transport rate of U(VI) was 57.2 (±2.6)%.
研究领域:
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Chen Cheng,Jingjie Wu,Zhiqiang Huang
In this study, a novel collector, N 1 ,N 10 -dihydroxydecanediamide (DHH) was synthesized in our lab and introduced in flotation of malachite ore. The separation performance and action mechanism of DHH were explored and compared with octyl hydroxamic acid (OHA). The results of single mineral flotation tests indicated that DHH exhibited a stronger collecting ability to malachite and better selectivity against quartz and calcite than OHA, and floated out 94 % malachite, 8.5 % quartz and 17 % calcite at pH = 10 with a collector concentration of 60 mg/L. The FTIR spectra, zeta-potential tests and XPS tests proved that DHH could absorb onto malachite surface though a chemical mode. DFT calculation results showed that DHH anion owned a stronger affinity to malachite than DHH molecular and OHA anion/molecular, and its bis-minerophilic groups could form C(=O)NHO-Cu bond with surface Cu atom. It exhibited that DHH was an excellent candidate and capable for high efficiency flotation of malachite ore.
研究领域:
矿物加工工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2013
·Vol. 15
·期 36
·7274-7284
·
IF 3.879
Xiu-Li Wang,Fang-Fang Sui,Hong-Yan Lin,Chuang Xu,Guo-Cheng Liu,Ju-Wen Zhang,Ai-Xiang Tian
Six new transition metal coordination polymers, namely, [Co(1,2-BDC)(L)1.5(H2O)] (1), [Co(1,3-BDC)(L)(H2O)2]·H2O (2) [Co(5-AIP)(L)0.5(H2O)]·2H2O (3), [Cu(1,2-BDC)(L)] (4), [Cu(1,3-BDC)(L)(H2O)]·3H2O (5), and [Cu2(5-AIP)2(L)2(H2O)]·6H2O (6) (L = N,N′-di(3-pyridyl)octanediamide, 1,2-H2BDC = 1,2-benzenedicarboxylic acid, 1,3-H2BDC = 1,3-benzenedicarboxylic acid, 5-H2AIP = 5-aminoisophthalic acid), have been hydrothermally synthesized and structurally characterized by single crystal X-ray diffraction. In compound 1, the adjacent CoII ions are connected by L ligands to form a 1D chain with an alternating arrangement of L ligands and Co2L2 dinuclear loops. The 1,2-BDC anions coordinate with one CoII ion in a bis(monodentate) chelate mode. Complex 2 shows a 2D (44) grid network with the sql topology, which consists of the 1D zigzag [Co–L]n chain and 1D linear [Co-1,3-BDC]n chain. When 5-H2AIP is used in compound 3, an interesting 2D terraced-type layer based on 1D [Co-5-AIP]2n ladder-like chains and μ2-bridging L ligands with 3,4-connected {62.10}{6} topology is formed. Under the similar conditions to compound 1, except that the cobalt(II) salt is replaced by a copper(II) salt, a 2D wave-like network 4 with 2,4-connected {64.8.10}{6} topology is obtained. Compound 5 displays a 3D coordination polymeric architecture based on 1D [Cu-1,3-BDC]n chains and [Cu–L]n chains, which represents an intriguing 3-fold interpenetrating framework with CdSO4-type topology. When 1,3-BDC is replaced by 5-AIP, another 3-fold interpenetrating 3D CdSO4-type coordination framework for compound 6 is obtained, which is constructed from three types of 1D chains: [La–Cu–Lc]n chain, [Lb–Cu–Lb]n chain and [Cu-5-AIP]n chain. The adjacent 1D chains for 1 and 2D layers for compounds 2, 3 and 4 are further extended by hydrogen bonding interactions to 3D supramolecular frameworks. The effect of dicarboxylates and central metals on the structures of the title complexes has been discussed. Furthermore, the electrochemical behaviors and solid state fluorescent properties for compounds 1–6 are investigated.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2024
·
IF 6.3
Zixuan Zheng,John Lou Yao,Qiang Yao
Thermal degradation of N, N'-dibutyladipamide and polyamide 66 (PA66) was carried out in a large-scale experimental setup with nitrogen sweeping in order to collect elusive degradation intermediates. At a high nitrogen flow rate, 1-butylazepane-2,7-dione was identified as a major degradation product from the thermal decomposition of N, N'-dibutyladipamide. Upon heating, 1-butylazepane-2,7-dione produced cyclopentanone and its derivatives, dibutylurea and a nitrile that constituted the majority of degradation products of N, N'-dibutyladipamide, proving that the 7-membered heterocycle compound is a crucial primary degradation product as well as a precursor for the secondary degradation products of N, N'-dibutyladipamide. Subsequently, chemistry concerning the generation and decomposition of 1-butylazepane-2,7-dione was developed for the thermal decomposition of DBA. On the other hand, hexamethylenediamine, 1,8-diazacyclotetradecane-2,7-dione, cyclopentanone and its derivatives were collected as important degradation products from the thermal decomposition of PA66. In view of the structural similarity between DBA and PA66 and their comparable degradation products, a mechanism centering on the generation and decomposition of a 7-membered ring has ultimately been established for thermal degradation of PA66.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Yao Qin,Yuanmeng Wang,Hengkun Zhao,Fuju Xu,Jingbo Zhao,Jue Cheng,Junying Zhang
Vinylogous urethane (VU) vitrimer, as an emerging reprocessable material, exhibits excellent designability, reprocessability, recyclability, and wide potential applications. A critical challenge persisting in VU materials is harmonizing exceptional mechanical strength with robust recyclability and reprocessability. Here, a simple strategy was presented to synthesize VU vitrimers with excellent mechanical properties and good reprocessability through the incorporation of symmetrical diamide motifs into VU backbones. Dynamic mechanical analysis and tensile testing revealed outstanding mechanical properties, including a tensile strength of 112.2 MPa and a storage modulus of 2.5 GPa. The designed VU networks demonstrated full closed-loop recyclability via thermal reprocessing or acidic hydrolysis, retaining 80–90% of their initial mechanical integrity after two reprocessing cycles. This study provides a versatile molecular design paradigm for engineering high-performance reprocessable materials and extends its applicability to VU-based systems and other recyclable polymer platforms.
研究领域:
高分子化学
·
材料科学
·
可持续化学
·
再生材料工程
·
动态共价化学
✓ 已验证
产品关联
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
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2025
·
IF 6.2
Ming-Hui Yi,Heng-Ji Wang,Bing-Jie Wang,Meng-Yu Wang,Zi Tang,Qing-Qi Meng,Yao Shi,Wen-Lin Li,Xiao-Lan Liao,Li Shi
Tiorantraniliprole is a novel diamide insecticide, and the resistance level and mechanism of Spodoptera litura to tiorantraniliprole and the multiresistance mechanism with other diamide insecticides are still unknown. In this study, bioassays showed that field S. litura developed high and medium levels of resistance to tiorantraniliprole, chlorantraniliprole, and cyantraniliprole. Enzyme activity and synergist bioassay indicated that P450s was the main factor leading to metabolic resistance to tiorantraniliprole. Transcriptome sequencing and qPCR showed that CYP6B50 was upregulated by tiorantraniliprole induction and overexpressed in the field-resistant strain. RNA interference and transgenic fruit fly indicated that CYP6B50 was involved in multiresistance to tiorantraniliprole, chlorantraniliprole, and cyantraniliprole. In addition, a target mutation site I4723M in RyR was detected in the field-resistant strain. Further genetic crossing and insecticides docking confirmed that the I4723M mutation involved in chlorantraniliprole and cyantraniliprole resistance also mediated resistance to tiorantraniliprole. This study comprehensively elucidated the mechanisms of resistance to diamide insecticides from both metabolic and target-site resistance in S. litura.
研究领域:
昆虫学
·
分子生物学
·
农药科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Kexin Yang,Rong Sun,Jingliang Zhao,Chong Deng,Bingwu Wang,Song Gao,Wenliang Huang
Molecular design is crucial for improving the performance of single-molecule magnets (SMMs). For dysprosium(III) SMMs, enhancing ligand-field axiality is a well-suited strategy to achieve high-performance SMMs. We synthesized a series of dysprosium(III) complexes, (NNTIPS)DyBr(THF)2 (1, NNTIPS = fc(NSiiPr3)2; fc = 1,1′-ferrocenediyl, THF = tetrahydrofuran), [(NNTIPS)Dy(THF)3][BPh4] (2), (NNTIPS)DyI(THF)2 (3), and [(NNTBS)Dy(THF)3][BPh4] (4, NNTBS = fc(NSitBuMe2)2), supported by ferrocene diamide ligands. X-ray crystallography shows that the rigid ferrocene backbone enforces a nearly axial ligand field with weakly coordinating equatorial ligands. Dysprosium(III) complexes 1–4 all exhibit slow magnetic relaxation under zero fields and possess high effective barriers (Ueff) around 1000 K, comparable to previously reported (NNTBS)DyI(THF)2 (5). We probed the influences of structural variations on SMM behaviors by theoretical calculations and found that the distribution of negative charges defined by rq, i.e., the ratio of the charges on the axial ligands to the charges on the equatorial ligands, plays a decisive role. Moreover, theoretical calculations on a series of model complexes 1′–5′ without equatorial ligands unveil that the axial crystal-field parameters B20 are directly proportional to the N–Dy–N angles and support the hypothesis that enhancing the ligand-field axiality could improve SMM performance.
研究领域:
无机化学
·
配位化学
·
分子磁性
·
材料科学
·
理论化学
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Yizhi Chen,Zhiyi Wang,Xiaofan Yang,Zifang Guo,Weiqun Shi,Peng Zhang,Mingzhang Lin
2,9-Diamide-1,10-phenanthroline (DAPhen) extractants constitute a novel class of tetradentate agents due to their high affinity for actinides and their adherence to the CHON principle. In this investigation, we explored the performance in extraction and the capabilities for An/Ln separation of a series of N,N′-diethyl-N,N′-diethyl-2,9-diamide-1,10-phenanthroline (Et-Et-DAPhen), N,N′-dioctyl-N,N′-dioctyl-2,9-diamide-1,10-phenanthroline (Oct-Oct-DAPhen), N,N′-diethyl-N,N′-ditolyl-2,9-diamide-1,10-phenanthroline (Et-Tol-DAPhen), and N,N′-dialkyl-N,N′-diphenyl-2,9-diamide-1,10-phenanthroline (R-Ph-DAPhen, R = H, Me, Et, Oct) extractants featuring diverse amide substituents. Combining extraction experiments with theoretical calculations reveals that substituting ethyl with octyl enhances the extraction efficiency. Moreover, phenyl amide substituents exhibit superior extraction properties compared with alkyl counterparts. Augmenting the alkyl carbon chain length of the amide substituent proves beneficial for improving extraction performance. In contrast to alkyl, tolyl substituents demonstrate an enhanced favorability for extraction. By comparing the extraction performance and separation performance before and after irradiation, combined with theoretical calculations, it reveals that appropriately increasing the carbon chain length of the amide substituent can enhance radiation stability. Additionally, the incorporation of phenyl-substituted alkanes contributes to the heightened radiation stability of the extractant. This work promises to contribute to the structural design and performance optimization of novel extractants for An–Ln separation, thereby facilitating advances in extraction and separation methodologies.
研究领域:
核化学
·
分离科学
·
锕系与镧系化学
·
辐射化学
·
配位化学
·
有机合成
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）