DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 42
·15413-15421
·
IF 4.39
Jingwei Liu,Yanjie Liang,Shao Yan,Dongxun Chen,Shihai Miao,Weili Wang
Luminescent materials that emit in the narrowband ultraviolet-B (NB-UVB; 310–313 nm) spectral region have attracted considerable attention due to their unique spectral features, which endow them with great potential applications in the fields of photochemistry and photomedicine. However, NB-UVB persistent luminescent materials are relatively lacking, especially materials that are excitable by natural sunlight. Here we report the NB-UVB persistent luminescence of Gd3+ in (Y,Gd)3Ga5O12:Bi3+ garnets by making use of the persistent energy transfer from Bi3+ to Gd3+. The optimal Bi3+ and Gd3+ concentrations for the maximum energy transfer efficiency are determined and persistent NB-UVB light emission with a peak wavelength at 313 nm and an afterglow time of more than 24 h is successfully achieved in the (Y,Gd)3Ga5O12:Bi3+ phosphor. More importantly, the as-synthesized NB-UVB persistent phosphors are also excitable by the widely available natural sunlight and exhibit exceptional NB-UVB persistent luminescence performance. Benefitting from the visible-blind emission feature, interference-free capability from indoor ambient light and self-sustained optical characteristic, the developed sunlight-excitable NB-UVB persistent phosphors here not only hold great promise for covert optical tagging applications, but also open new opportunities for optical data storage in a bright indoor environment.
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DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 10
·4097-4103
·
IF 4.569
Zhikang Chen,Kewang Zhang,Bei Zhang,Jun Zhang
A new borate, Na2SrB16O26, was synthesized by the high-temperature solution method. It exhibits complicated interpenetrating 3D B–O frameworks composed of the functional building block (FBB) [B8O16]. The UV-vis-NIR diffuse reflectance spectroscopy shows that it has a deep-ultraviolet (DUV) cutoff edge (<200 nm). The relationship between the structures and optical properties was uncovered by theoretical calculations. By the first-principles calculation, the birefringence is estimated to be 0.07 at 1064 nm. The response electron distribution anisotropy (REDA) analysis indicates that the [BO3] units contribute mainly to the generation of the moderate birefringence.
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JOURNAL OF ORGANOMETALLIC CHEMISTRY
·
2021
·
IF 2.369
Ke Cao,Ji Wu,Cai-Yan Zhang,Li-Fang Ding,Junxiao Yang
A palladium catalyzed intramolecular amination of B(7)-H for synthesis of o -carborane fused isoquinolinones has been developed. Kinds of o -carborane fused isoquinolinones decorated with active groups have been synthesized with good to excellent yields. A plausible mechanism involving palladium catalyzed electrophilic B-H activation/amination was proposed.
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JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2023
·
IF 2.7
Huicai Xie,Zhaojun Mo,Quanyi Liu,Hao Sun,Shengcan Ma,Xinqiang Gao,Jun Shen
EuTiO 3 exhibits various interesting physical properties, including magnetocaloric effect, quantum paraelectricity, magnetoelectricity, and multiferroic properties, thus attracting a broad range of attention from the researchers. The delicate balance between ferromagnetic coupling and antiferromagnetic interactions offers the feasibility of modulating the magnetic properties and magnetocaloric effect for this perovskite. Herein, a range of Eu(Ti,B)O 3 perovskites were prepared by substituting titanium with different amounts of boron. A comprehensive investigation on their structure, magnetism, magnetocaloric effect, and critical behavior was performed. All the compounds are confirmed to be crystallized in a single cubic perovskite structure with space symmetry of Pm 3 m , with the introduced boron uniformly distributed in the compounds. The transition temperatures are determined to be 6.0, 6.5, 5.0, and 5.0 K for EuTi 0.9375 B 0.0625 O 3 , EuTi 0.875 B 0.125 O 3 , EuTi 0.8125 B 0.1875 O 3 , and EuTi 0.75 B 0.25 O 3 , respectively. The results of both magnetic measurements and critical behavior analysis suggest that appropriate substitution of boron promotes the magnetic transition from AFM to FM in Eu(Ti,B)O 3 . In addition, significantly enhanced low-field magnetocaloric effects were observed in these perovskites. Under field changes of 0–1 and 0–2 T, the values of - Δ S M max are 14.7 and 26.4 J·kg −1 ·K −1 for EuTi 0.8125 B 0.1875 O 3 , 15.2 and 27.4 J·kg −1 ·K −1 for EuTi 0.75 B 0.25 O 3 , respectively.
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MOLECULES
·
2025
·Vol. 30
·期 8
·1717
·
IF 4.6
Chenghong Ao,Mai Shan,Yue Zhang,Xiang Li,Ying Kong,Xinwei Dong,Yang Liu,Danping Wu
Biochar has attracted considerable interest owing to its high adsorption capacity; however, the mechanisms through which environmental factors influence the release of adsorbed pollutants remain unclear. This study investigates the adsorption and desorption dynamics of Rhodamine B (RhB) on biochars B2 and B6, which were pyrolyzed at temperatures of 200 °C and 600 °C, respectively, under varying conditions. The results indicated that there was no significant difference in removal efficiency at low RhB concentrations; however, at a concentration of 600 mg/L, biochar B2 had a higher removal efficiency than B6, likely attributable to more adsorption sites. Increased temperatures were found to enhance desorption from both B2 and B6, with B6 exhibiting a faster desorption rate. This phenomenon may be due to the stronger hydrogen bonding between B2 and RhB, which could inhibit desorption. In addition, elevated pH values facilitated desorption, presumably through electrostatic repulsion. Under alkaline conditions, B2 released a greater amount of dissolved organic matter (DOM), leading to increased RhB desorption relative to B6. This study offers a valuable reference for evaluating the environmental risk associated with the application of biochar in real-world settings.
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ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Hongrui Zhang,Ya-nan Zhang,Like Li,Xuegang Li,Yong Zhao
A method for the determination of cholesterol using rhodamine derivatives as chromogenic substrates was proposed in this study. The oxidation of rhodamine B hydrazide (RBH) by hydrogen peroxide (H2O2) was catalyzed by a peroxide-mimicking enzyme to produce the fluorescent product. The reaction was further combined with the oxidase system to achieve indirect determination of cholesterol concentration, which can be catalyzed by cholesterol oxidase to produce H2O2 as an intermediate product. Optical fiber optofluidic lasers (FOFLs), as a sensitive biochemical detection platform, have the ability to distinguish small differences in the amount of fluorescence products generated by the reaction and were used to achieve sensitive cholesterol detection. Under optimized experimental conditions, the dynamic range of three orders of magnitude was obtained in the determination of H2O2 with a lower limit of detection (LOD) of 1.63 μM, and the assay time was as short as 3.5 min. On this basis, the designed cholesterol sensor obtained a linear range of 2.55–652.67 μM with a lower LOD of 2.55 μM and proved to have good selectivity. The possibility of cholesterol determination in human serum was initially tested. The sensor was also characterized by easy signal collection, wash-free procedure, controlled sample consumption, fast assay, low cost, and simple operation.
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Phytochemistry Letters
·
2019
·
IF 1.338
Yu Li,Wei Wei,Ren-Lei Wang,Fang Liu,Yong-Kun Wang,Ran Li,Babar Khan,Jie Lin,Wei Yan,Yong-Hao Ye
Two new γ-butyrolactone derivatives, colletolides A and B ( 1 and 2 ), together with three known compounds, sclerone ( 3 ), 3-methyleneisoindolinon ( 4 ) and indole-3-acetamide ( 5 ), were isolated from the culture of the endophytic fungus Colletotrichum gloeosporioides B12, which resides in the medicinal plant Illigera rhodantha Hance. Their structures were characterized by a combination of HR-ESI-MS, NMR and ECD spectra. Compounds 1 and 2 showed moderate antibacterial activity against Xanthomonas oryzae pv. oryzae , X. oryzae pv. oryzicola and Ralstonia solanacearum with the same MIC values of 128 μg/mL.
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Desalination and Water Treatment
·
2016
·
IF 1.272
Yong-Sheng Lu,Zhan Wang,Yun-Feng Xu,Qiang Liu,Guang-Ren Qian
Iron molybdate (Fe2(MoO4)3) was used as a novel heterogeneous catalyst to activate persulfate () for rhodamine B (RhB) degradation. Results indicated 10 mg/L RhB can be completely removed under the addition of 4 mM and 0.4 g/L Fe2(MoO4)3 within 240 min. Fe2(MoO4)3 can be repeatedly used for six cycles and showed high stability with Fe leaching amounts less than 2.9% in each run. Possible catalytic mechanism was proposed as follows: RhB degradation intermediate products such as hydroxybenzene, quinone compounds and organic compound radicals acted as electron transfer agents to reduce Fe3+ to Fe2+, which reacted with persulfate to form Fe3+ creating the redox cycling of iron, the RhB and those intermediate products are oxidized directly by the molybdenum peroxo complexes which forming probably with and persulfate, and the synergy between Fe3+ and occurring the catalytic effect on the persulfate. Additionally, the major intermediates of RhB were identified according to GC/MS and the possible degradation pathway was proposed.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2020
·
IF 4.192
Xiao-Di Zhao,Bin-Wu Zhang,Li-Jun Fu,Qi-Lin Li,Yi Lin,Xiao-Qiang Yu
Cry toxins produced by Bacillus thuringiensis are well known for their high insecticidal activities against Lepidoptera, Diptera, and Coleoptera; however, their activities against Aphididae are very low. Recently, it has been reported that a Cry41-related toxin exhibited moderate activity against the aphid Myzus persicae, and thus, it is highly desirable to uncover its unique mechanism. In this paper, we report that Cathepsin B, calcium-transporting ATPase, and symbiotic bacterial-associated protein ATP-dependent-6-phosphofructokinase were pulled down from the homogenate of M. persicae as unique proteins that possibly bound to Cry41-related toxin. Cathepsin B has been reported to cleave and inactivate antiapoptotic proteins and plays a role in caspase-initiated apoptotic cascades. In this study, Cathepsin B was expressed in Escherichia coli and purified, and in vitro interaction between recombinant Cathepsin B and Cry41-related toxin was demonstrated. Interestingly, we found that addition of Cry41-related toxin obviously enhanced Cathepsin B activity. We propose a model for the mechanism of Cry41-related toxin as follows: Cry41-related toxin enters the aphid cells and enhances Cathepsin B activity, resulting in acceleration of apoptosis of aphid cells.
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Acta Biomaterialia
·
2022
·
IF 10.633
Wenhao Zhong,Xinyu Zhang,Xiao Duan,Hengyu Liu,Yifen Fang,Moucheng Luo,Zhengwen Fang,Congxiu Miao,Dongjun Lin,Jun Wu
Gemcitabine , as a standard and classic strategy for B-cell lymphoma in the clinic, is limited by its poor pharmacodynamics . Although stimuli-responsive polymeric nanodelivery systems have been widely investigated in the past decade, issues such as complicated procedures, low loading capacity, and uncontrollable release kinetics still hinder their clinical translation. In view of the above considerations, we attempt to construct hyperbranched polyprodrug micelles with considerable drug loading via simple procedures and make use of the particularity of the tumor microenvironment to ensure that the micelles are “inactivated” in normal tissues and “activated” in the tumor microenvironment. Hence, in this work, a redox-responsive polymeric gemcitabine-prodrug (GEM-S-S-PEG) was one-pot synthesized via facile esterification and acylation . The self-assembled subsize (< 100 nm) GEM-S-S-PEG (GSP NPs) with considerable loading capacity (≈ 24.6%) exhibited on-demand and accurate control of gemcitabine release under a simulated tumor microenvironment and thus significantly induced the apoptosis of B-cell lymphoma in vitro . Moreover, in the A20 tumor xenograft murine model, GSP NPs efficiently decreased the expansion of tumor tissues with minimal systemic toxicity. In summary, these redox-responsive and self-assembling GSP NPs with a facile one-pot synthesis procedure may hold great potency in clinical translation for enhanced chemotherapy of B-cell lymphoma. Statement of significance A redox-responsive polymeric gemcitabine-prodrug (GEM-S-S-PEG) was one-pot synthesized via facile esterification and acylation. The self-assembled subsize (< 100 nm) GEM-S-S-PEG (GSP NPs) exhibited significant tumor therapeutic effects in vitro and in vivo . The polyprodrug GEM-S-S-PEG prepared in this study shows the great potential of redox-responsive nanodrugs for antitumor activity , which provides a reference value for the optimization of the design of functional polyprodrugs.
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Acta Pharmaceutica Sinica B
·
2020
·
IF 7.097
Hao Cai,Yufan Xiang,Yujun Zeng,Zhiqian Li,Xiuli Zheng,Qiang Luo,Hongyan Zhu,Qiyong Gong,Zhongwei Gu,Yanhui Liu,Hu Zhang,Kui Luo
Multi-modal therapeutics are emerging for simultaneous diagnosis and treatment of cancer. Polymeric carriers are often employed for loading multiple drugs due to their versatility and controlled release of these drugs in response to a tumor specific microenvironment. A theranostic nanomedicine was designed and prepared by complexing a small gadolinium chelate, conjugating a chemotherapeutic drug PTX through a cathepsin B-responsive linker and covalently bonding a fluorescent probe pheophorbide a (Ppa) with a branched glycopolymer. The branched prodrug-based nanosystem was degradable in the tumor microenvironment with overexpressed cathepsin B, and PTX was simultaneously released to exert its therapeutic effect. The theranostic nanomedicine, branched glycopolymer-PTX-DOTA-Gd, had an extended circulation time, enhanced accumulation in tumors, and excellent biocompatibility with significantly reduced gadolinium ion (Gd 3+ ) retention after 96 h post-injection. Enhanced imaging contrast up to 24 h post-injection and excellent antitumor efficacy with a tumor inhibition rate more than 90% were achieved from glycopolymer-PTX-DOTA-Gd without obvious systematic toxicity. This branched polymeric prodrug-based nanomedicine is very promising for safe and effective diagnosis and treatment of cancer.
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FOOD RESEARCH INTERNATIONAL
·
2025
·
IF 8
Yaxin Yu,Fei Xia,Qi Cao,Hanyuan Zhang,Wanting Shi,Peng Zhang,Wenxiu Sun
The adoption of innovative active food packaging has become increasingly crucial for suppressing microbial proliferation and prolonging the shelf life of food items. In this research, we detail the development of novel photodynamic antimicrobial nanofiber films via the electrospinning method, employing polyvinyl alcohol (PVA) as the base material and erythrosine B (EB) as the photosensitizing agent. We examined the chemical composition, photophysical characteristics, and antibacterial properties of these films. FTIR spectroscopy validated the integration of EB within the nanofiber structures. Furthermore, EB enhanced the films' resistance to water, lowered water vapor permeability, and displayed moderate mechanical strength. The nanofiber films exhibited a remarkable capability for generating reactive oxygen species and showed significant antibacterial effectiveness against E. coli , S. aureus , P. putida , and P. aeruginosa , maintaining an overall migration limit of EB within the acceptable threshold of 10 mg/dm 2 . We utilized PVA/EB-G films along with tray packaging to preserve chilled horsemeat, assessing physicochemical alterations and microbial populations. The storage life of chilled horsemeat was prolonged by 6 days in comparison to controls that did not include PVA/EB-G films. The results of this investigation propose a novel strategy for harnessing photodynamic mechanisms in the preservation of chilled meat.
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