ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2025
·
IF 6.1
Danni Jiang,Yang Yang,Xiaojuan Han,Qianni Li,Yingxiu Ma,Jun Jiao,Lan Chao
Fluorene-9-bisphenol (BHPF), a widely recognized alternative to bisphenol A (BPA), has been increasingly used in a wide range of industries. However, despite numerous studies, the direct mechanism underlying its male reproductive toxicity remains poorly understood. Here, a BHPF-exposed mouse model was established to evaluate the effect of BHPF on male fertility. The results showed that BHPF exposure induced reproductive dysfunction, including testis damage, spermatogenesis impairment, steroid hormone disruption and sperm quality degradation. Mechanistically, over 90,000 differentially methylated regions were identified and increased global testicular methylation levels indicated that DNA methylation may be associated with BHPF-induced testicular damage. Transcriptome analysis revealed 221 up-regulated genes and 227 down-regulated genes in BHPF-exposed mice, mainly enriched in the steroid biosynthetic pathway. Further combined methylome and transcriptome analysis revealed the critical methylated genes potentially involved in lipid metabolism. The differentially expressed genes (Cyp4a10 and Rdh1) were further confirmed to correlate with impaired male mouse fertility. Taken together, the results of this study provide a better understanding of the molecular mechanisms of toxicity effects induced by BHPF exposure from the perspective of methylome and transcriptome.
研究领域:
毒理学
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表观遗传学
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生殖生物学
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DOI
PubMed
高影响因子
Frontiers of Optoelectronics
·
2022
·Vol. 15
·期 1
·1-10
·
IF 0
Jiang Mengjia,Li Shuyu,Zhen Chun,Wang Lingsong,Li Fei,Zhang Yihan,Dong Weibing,Zhang Xiaotao,Hu Wenping
Simultaneously realizing the optical and electrical properties of organic materials is always challenging. Herein, a convenient and promising strategy for designing organic materials with integrated optoelectronic properties based on cocrystal engineering has been put forward. By selecting the fluorene (Flu) and the 7,7′,8,8′-tetracyanoquinodimethane (TCNQ) as functional constituents, the Flu-TCNQ cocrystal prepared shows deep red emission at 702 nm, which is comparable to the commercialized red quantum dot. The highest electron mobility of organic field-effect transistor (OFET) based on Flu-TCNQ is 0.32 cm 2 V −1 s −1 . Spectroscopic analysis indicates that the intermolecular driving force contributing to the co-assembly of Flu-TCNQ is mainly charge transfer (CT) interaction, which leads to its different optoelectronic properties from constituents. Graphical Abstract
研究领域:
材料科学
·
光学
·
电子工程
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DOI
PubMed
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 12
·5497-5502
·
IF 3.591
Yan Chen,Yanqing Wang,Di Wu,Wenfei Wu,Yu Wu,Sicheng Li,Chunlan Qin,Hongyu Lin,Huachen Shen,Chengwu Shi
Three asymmetric spiro[fluorene-9,9′-xanthene] (SFX)-based hole transporting materials (HTMs) with N-(p-methoxyphenyl)-N′-(9,9′-dimethylfluoren-2-yl)amino (FPA) substituents, which are termed SFX-F, SFX-FM, and SFX-FP, have been synthesized by a facile process. When modifying the number and position of FPA substituents in the HTMs, it was found that there is no significant variation in the HOMO energy by increasing the number of FPA groups, while the thermal stability is governed by the substitution position. SFX-FM, which contains two meta-substituted FPA groups on the xanthene unit, exhibits a suitable HOMO energy level (−5.24 eV) and a strikingly high Tg (154 °C). In addition, SFX-FM also shows better film-forming properties and excellent hydrophobicity, which is conducive to fabricating high-performance devices. Noticeably, the PSCs based on SFX-FM achieved a power conversion efficiency (PCE) of 17.29% under AM 1.5 G illumination at 100 mW cm−2, unprecedentedly outperforming PSCs based on spiro-OMeTAD (15.14%).
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Xiujuan Liu,Na Li,Tianyue Zhao,Qing Li,Zihe Lu,Ze Chen,Bo Feng,Tifeng Jiao
The Langmuir-Blodgett (LB) technique can be used to obtain highly ordered arrangement and assembly of high polymer molecular chains , and the obtained LB films exhibit the controllable structures and special physicochemical properties . Here, we successfully prepared the composite LB films based on bisphenol fluorene (BPF) and epoxy bisphenol fluorene (DGPF) by LB technique, as well as explored the microstructures of the composite LB films by atomic force microscopy (AFM) and transmission electron microscopy (TEM). The different aggregation states of various dye molecules in the composite LB films are investigated by UV–vis. Interestingly, the composite LB film electrodes exhibit promising photoelectrochemical properties. In particular, BPF/MB and DGPF/MB LB films show better photoelectric conversion efficiency. It is attributed to the ordered arrangement of BPF and DGPF and their effective aggregation with dye molecules, which improves the light absorption ability and charge transfer efficiency of the materials. Therefore, the prepared LB films based on the synthetic polymers BPF and DGPF are expected to play an important role in microelectronics.
研究领域:
材料科学
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物理化学
·
微电子学
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DOI
高影响因子
CHEMOSPHERE
·
2024
·
IF 8.1
Hong-Peng Shi,Ying-Hao Zhao,Mei-Lin Zheng,Cheng-Yan Gong,Lei Yan,Ying Liu,Yong-Ming Luo,Zhi-Pei Liu
The performance of bacterial strains in executing degradative functions under the coexistence of heavy metals/heavy metal-like elements and organic contaminants is understudied. In this study, we isolated a fluorene-degrading bacterium, highly arsenic-resistant, designated as strain 2021, from contaminated soil at the abandoned site of an old coking plant. It was identified as a member of the genus Rhodococcus sp. strain 2021 exhibited efficient fluorene-degrading ability under optimal conditions of 400 mg/L fluorene, 30 °C, pH 7.0, and 250 mg/L trivalent arsenic. It was noted that the addition of arsenic could promote the growth of strain 2021 and improve the degradation of fluorene – a phenomenon that has not been described yet. The results further indicated that strain 2021 can oxidize As 3+ to As 5+ ; here, approximately 13.1% of As 3+ was converted to As 5+ after aerobic cultivation for 8 days at 30 °C. The addition of arsenic could greatly up-regulate the expression of arsR / A / B / C / D and pcaG / H gene clusters involved in arsenic resistance and aromatic hydrocarbon degradation; it also aided in maintaining the continuously high expression of cstA that codes for carbon starvation protein and prmA / B that codes for monooxygenase. These results suggest that strain 2021 holds great potential for the bioremediation of environments contaminated by a combination of arsenic and polycyclic aromatic hydrocarbons. This study provides new insights into the interactions among microbes, as well as inorganic and organic pollutants.
研究领域:
环境微生物学
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生物修复
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毒理学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
HIGH PERFORMANCE POLYMERS
·
2017
·
IF 1.179
Tengyang Zhu,Xing Yang,Xiaoqi He,Yayun Zheng,Jujie Luo
A series of new aromatic polyamides (PAs) and copolyamides (CPAs) containing fluorene group have been synthesized through polycondensation reaction. The chemical structure was confirmed by Fourier transform infrared and proton nuclear magnetic resonance (1H NMR). PAs and CPAs exhibited the higher thermal stability (Td15 > 378°C in nitrogen), the higher glass transition temperature (Tg > 345°C), and excellent solubility in polar solvent. Gas transport properties of the PA and CPA membranes were investigated using different single gases (hydrogen (H2), carbon dioxide (CO2), oxygen (O2), methane (CH4), and nitrogen (N2)). We discussed the effect of chemical structure and operating temperature on gas transport properties. The results show that PA-1 containing a hexafluoroisopropylidene moiety exhibited the highest gas permeability (PH2 = 12.71 Barrer, PCO2 = 12.26 Barrer, and PO2 = 2.62 Barrer) and reasonably good selectivity (α(H2/N2) = 27.63, α(CO2/N2) = 26.65, and α(O2/N2) = 5.70) at 25°C and 1 atm. For all the membranes, gas permeability gradually increased with the increase in operating temperature, while the selectivity gradually decreased. These gas permeation results were well correlated with fractional free volume, interchain d-spacing (dsp), and intermolecular interaction.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2021
·
IF 3.266
Xin-jie Chen,Jian Li,Chen-yi Wang,Qiang Ren
A series of 9,9-bis(allyl)fluorene copolymers (PFAF) with allyl groups on the side chain were synthesized by Suzuki coupling reaction. The cross-linked fluorene copolymers were realized via thiol-ene click reaction between allyl groups and thiol groups from crosslinker under ultraviolet light. Fourier transform infrared spectroscopy (FTIR), cyclic voltammetry (CV), UV–Vis absorption spectroscopy and photoluminescence spectroscopy (PL) were used to investigate the crosslinking efficiency of the thiol-ene click reaction and the impacts of crosslinking on the performances of fluorene copolymers. The results showed that allyl fluorene copolymers with high molecular weight and different content of 9,9-bis(allyl) fluorene units were successfully synthesized. Fluorene copolymers containing allyl fluorene structural units can be effectively crosslinked by the thiol-ene click reaction. The crosslinking conditions and the factors which influence the crosslinking were investigated in detail. The fluorene copolymer films which were composed of a fluorene copolymer with 10 mol% allyl fluorene structural units (PF10AF) and 39 wt% pentaerythritol tetra(3-mercaptopropionate) (PETMP) can be crosslinked to 85% crosslinking degree under irradiation of 1.8 mW/cm 2 LED UV light at 390 nm for 50 s in air. It was found that the thiol-ene click cross-linking had little effects on the photoluminescence spectra of the fluorene copolymers. The thiol-ene click crosslinking showed a much faster crosslinking rate and higher crosslinking efficiency for fluorene copolymers than those of conventional free radical polymerization crosslinking. The results of this study provide a feasible method for cross-linking conjugated polymers in various applications.
研究领域:
材料科学
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高分子化学
·
光学材料
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产品关联
DOI
高影响因子
HIGH PERFORMANCE POLYMERS
·
2017
·
IF 1.179
Ying Sun,Xiaojing Ding,Xueqin Zhang,Qizan Huang,Baoping Lin,Hong Yang,Lingxiang Guo
A series of conjugated copolymers based on indeno[1,2-b]fluorene as donor unit with different acceptor units have been synthesized to explore the influences of molecular backbone planarization and acceptor electronegativity on charge transport and photovoltaic properties. Polymer incorporating 2,3-diphenylquinoxaline acceptor moiety shows poor light-harvesting capacity and inferior photovoltaic efficiency of 0.5% due to twisted geometry. By introducing the stronger acceptor thiadiazolo[3,4-c]pyridine in polymer, intramolecular charge transfer is enhanced, giving rise to improved absorption property and photovoltaic efficiency of 1.39%. However, the polymer backbone is still twisted. When thiophene-flanked diketopyrrolopyrrole (DPP) is incorporated as electron acceptor, the polymer exhibits a more planar molecular geometry, yielding a broader and red-shifted absorption spectrum as well as a significantly improved hole mobility of 1.46E-2 cm2 V−1 s−1. However, the photovoltaic device efficiency is only enhanced to be 1.69%. The low-lying lowest unoccupied molecular orbital of −3.95 eV as a result of the strong electron deficiency of the DPP unit may lead to the inefficient charge dissociation and increase the charge recombination, which may give rise to the limit photovoltaic performance.
研究领域:
材料科学
·
有机电子学
·
光伏技术
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Zhixuan Zhao,Dhandapani Kuzhandaivel,Xuan Zhou,Wudi Zhang,Yalong Yuan,Gaolong Zhang,Cheng Ke,Xiaohong Ding,Lixin Wu,Zixiang Weng
In cold environments, the driving range of electric vehicles is significantly reduced due to the high energy consumption of active de-icing systems. As a result, enhancing the passive de-icing capability of car windshields has become a focal point in both academic and industrial research in recent years. Compared to other application, deicing for car windshields requires higher standards for transparency, durability, and universality. In this work, a UV-curable, transparent superhydrophobic coating based on polyurethane was developed, aimed at anti-icing and self-cleaning applications for automotive windshields. This coating, with its active anti-icing capability, reduces the adhesion of water and ice to the glass surface, significantly lowering the energy consumption for de-icing at start-up, improving de-icing efficiency. By integrating a spray-coating method with SiO2 particles, the coating achieves a balance between high transparency and excellent hydrophobicity. The experimental results show that when the concentration of SiO2 was 1.5 wt%, the coating exhibits a contact angle of 165°, over 82 % maximum light transmittance, and an extended ice delay time by 12 times compared to pristine glass. The ice adhesion force is reduced by 15 times as well. Additionally, the coating demonstrates excellent abrasion resistance and impact resistance to water droplets, maintaining its superhydrophobic state after 102,600 water drop impacts. This coating, with its active de-icing capability, significantly reduces the de-icing energy consumption of electric vehicles during startup by minimizing the adhesion of water droplets and ice layers on the glass surface, thereby enhancing de-icing efficiency in cold climates and extending the driving range.
研究领域:
材料科学
·
表面工程
·
汽车工程
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产品关联
DOI
高影响因子
HIGH PERFORMANCE POLYMERS
·
2017
·
IF 1.179
An-ran Wang,Abdul Qadeer Dayo,Dan Lv,Yi-le Xu,Jun Wang,Wen-bin Liu,Mehdi Derradji
A series of amino-containing fluorene-based bisphthalonitrile (AFPN) monomers with alkyl or alkoxy groups were successfully produced by the reaction of 4-nitrophthalonitrile with 9, 9-bis (3-alkyl (or alkoxy)-4-aminophenyl)-2, 7-dihydroxylfluorene in the presence of potassium carbonate by a nucleophilic substitution reaction. The chemical structures of the synthesized monomers were confirmed by the Fourier transform infrared (FTIR), proton nuclear magnetic resonance, and carbon-13 nuclear magnetic resonance analyses. The synthesized monomers’ curing behaviors were evaluated by FTIR and differential scanning calorimetry, and a rheological analysis was performed to evaluate their respective processabilities. Moreover, dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA) were performed for the thermomechanical, thermal, and thermo-oxidative analyses of the polymers. The results confirmed that the newly prepared phthalonitrile (PN) monomers with alkyl or alkoxy groups exhibited a self-promoted curing behavior. The rheological analysis suggested that the processing windows of the synthesized monomers were wider than that of APFN monomer bearing no flexible group. DMA and TGA revealed that the cured polymers exhibited high glass transition temperature (358–416°C) and the char yields at 800°C under nitrogen were between 70% and 77%. Moreover, the introduction of alkyl or alkoxy groups into the PN monomers’ backbones slightly reduced the thermal stability of the resulting polymers.
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DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 18
·3053
·
IF 4.329
Wenchao Zhang,Kuo Zhao,Feng Guan,Jinghua Yin,Yu Feng,Jialong Li,Yanpeng Li
As a new type of dielectric material, the low dielectric constant and corona resistance life of fluorene polyester (FPE) restricts the range of its applications. In order to simultaneously achieve a high dielectric constant and the long corona aging lifetime of FPE, SiO2nanoparticles were chosen as additive to prepare FPE-based composite films. The microstructure of the composite film was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), infrared spectroscopy (IR) and small-angle X-ray scattering (SAXS). The dielectric performances of the composites, including the dielectric constant, breakdown strength and corona resistance lifetime, were investigated. The results show that the introduced SiO2does not destroy the structure of the FPE molecular chain and that it increases the thickness of the filler-matrix interface. The dielectric constant of SiO2/FPE composites increased from 3.54 to 7.30 at 1 Hz. Importantly, the corona resistance lifetime increased by about 12 times compared with the pure FPE matrix. In brief, this work shows what possibilities there might be when considering the potential applications of high-strength insulating materials.Keywords:dielectric;fluorene polyester;composite film;corona aging lifetime
研究领域:
材料科学
·
电气工程
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DOI
PubMed
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 25
·17771-17779
·
IF 3.9
Tao Lu,Wei Fang,Qian Zhou,Mengjuan Liu,Guozhang Wu
This study aims to synthesize a specific type of polycarbonate with high refractive index, low birefringence, and resistance to hygrothermal aging by copolymerizing 2,2′-bis(2-hydroxyethoxy)-1,1′-binaphthyl (BNE) with 9,9-bis[4-(2-hydroxyethoxy)phenyl]fluorene (BPEF). Comparative analysis revealed that the copolymer synthesized from BNE and BPEF demonstrated superior hydrolytic stability relative to the bisphenol A-based polycarbonate. This augmented stability can be attributed to the monomers' higher pKa values, rendering acidic substances less capable of dissociating and thereby mitigating ester hydrolysis under hygrothermal conditions. Furthermore, the investigation probed into the phenomenon of physical aging in copolymerized polycarbonate when exposed to hygrothermal environments. It was discerned that the enthalpy loss, observable under both dry and hygrothermal conditions, could be linearly correlated with the difference between the aging temperature and the glass transition temperature (Tg), signifying a close correlation between the magnitude of physical aging and Tg. A lower Tg in the copolymerized polycarbonate led to more pronounced physical aging within the same timeframe, resulting in an augmentation of tensile strength and modulus, while higher Tg effectively mitigated the physical aging phenomenon.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）