JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 23
·16160-16168
·
IF 2.993
Qiao Yaping,Zhao Yudong,Yuan Xiaoyan,Zhao Yunhui,Ren Lixia
Brush block copolymers (BBCPs) with narrow polydispersity index (PDI) have the ability to self-assemble into lamellae phase, which makes them candidates for preparing one-dimensional photonic crystal (1D PC) materials. However, BBCPs with broad PDI were supposed to be difficult in fabrication of well-defined PCs. Herein, by utilizing atom transfer radical polymerization and ring-opening metathesis polymerization, widely dispersed BBCPs with polystyrene and poly( tert -butyl acrylate) as side chains were synthesized. Surprisingly, 1D PC thin films were obtained through controlled evaporation of the dichloromethane solution of BBCPs. The thin films exhibited a maximum peak wavelength of reflectance from 294 to 480 nm with the different main chain length even the PDI of the BBCP was as high as 2.1. And, the reflectance turned broader and broader with an increase in PDI and molecular weight. Wide wavelength PCs reflected from 280 to 620 nm were prepared, which showed great potential in displays.
研究领域:
材料科学
·
聚合物化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2024
·
IF 4.1
Yue Yang,Qixu Hu,Xiaojie Zhao,Feng He,Ganlu Li,Hui Li,Kequan Chen
Diisocyanate trimers are important products in the polyurethane industry. Large amounts of high-molecular-weight oligomers, which change the physical and chemical properties of the final products, are generated in the later stages of the synthesis process. It is important to understand the self-polymerization of high-molecular-weight oligomers. The relationship between this phenomenon and the PDI monomer concentration was first experimentally demonstrated. Then the self-polymerization of pentamethylene diisocyanate (PDI) was investigated via Dmol3 calculations using the linear synchronous transition (LST) and quadratic synchronous transition (QST) methods. Calculations revealed a new synthesis pathway with a reaction energy barrier of 31.548 kcal/mol, leading to the conversion of pentamers into decamers. In the initial stage of the polymerization reaction, the PDI monomer concentration was high, and the reaction followed a step-growth polymerization. However, as the PDI monomer concentration decreased and the PDI pentamer concentration increased in the later stage of the reaction, a new synthesis pathway emerged, leading to the direct synthesis of high-molecular-weight oligomers from the available oligomers. This study further demonstrates the self-polymerization of diisocyanate and provides a comprehensive understanding of its synthesis process. By inhibiting this new pathway can reduce the content of high-molecular-weight oligomers, increase yields, and reduce the product viscosity, all of which are beneficial for chemical process optimization.
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
CHEMISTRY-A EUROPEAN JOURNAL
·
2024
·
IF 3.9
Dandan Li,Wenrong Zhao,Gang Li,Yan Xu,Liang Xu,Bo Tang
Graphical Two novel star-shaped fluorophores named PDI−S and PDI−Se are constructed by S/Se-fused perylene diimides (PDIs) connected with bicarbazole core. Particularly, PDI−S presents excellent two-photon absorption cross-action (δ TPA ) of 3775 GM excited with 800 nm light, which is the highest value based on PDIs motif in the NIR−I region (700–900 nm). Two-photon absorption (TPA) has attracted growing attention over recent years owing to the wide range of applications in organic nonlinear optical (NLO) materials. The quantitative sensitivity of a two-photon molecular entity is determined by its TPA cross-section (δ TPA ). Perylene diimides (PDIs) are excellent n-type organic semiconductor materials demonstrating distinguished thermal, optical, and chemical stability. Nonetheless, PDIs-based scaffolds exhibit poor δ TPA in the NIR−I region (700–900 nm) due to the lack of suitable molecular design. Here, two novel star-shaped PDIs fluorophores, namely PDI−S and PDI−Se, were constructed by four periphery S/Se-fused PDIs connected with bicarbazole core. PDI−S manifested excellent δ TPA of 3775 GM, which are among the highest values reported for PDIs excited in the NIR−I region.
研究领域:
有机化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Xinyi Hu,Yicheng Pan,Chenfan Xie,Hua Li,Jianmei Lu
Pure organic photocatalytic materials often suffer from inefficient mass transfer and rapid charge recombination, limiting their practical applications in water purification. Herein, we construct donor–acceptor (D–A) composite vesicles by integrating electron-rich tetraphenylporphyrin (TPP) into perylene diimide (PDI)-based vesicular assemblies. The resulting TPP@PDI vesicles exhibit remarkable bifunctionality: (1) rapid adsorption of 2,4,6-trichlorophenol (TCP) within 1 min via hydrophobic, π–π, and electrostatic interactions, achieving 65% adsorption; (2) significantly enhanced photocatalytic degradation performance, completely removing TCP within 80 min under visible light. The incorporation of TPP not only broadens the visible-light absorption but also establishes a type-II energy alignment that facilitates directional electron transfer from TPP to PDI, thereby suppressing charge recombination and boosting the generation of reactive oxygen species (·O₂ − , 1 O₂, h + ). Consequently, the optimized composite vesicles (P: T = 8:2) exhibit a degradation rate constant 4.6 times higher than that of pure PDI vesicles and 29.3 times higher than that of pure TPP. This work demonstrates a rational design of organic D–A vesicular systems for synergistic adsorption–photocatalysis, offering a promising strategy for the efficient removal of persistent aqueous pollutants.
✓ 已验证
产品关联
DOI
高影响因子
Asian Journal of Organic Chemistry
·
2020
·Vol. 9
·期 7
·1076-1080
·
IF 3.13
Siyu Wu,Gengwen Yin,Caihong Cheng,Bo Liang,Haiquan Zhang
Graphical A new product -PDMBPRI-4F was synthesized by one-step method, which has the special property of fluorescence quenching caused by intramolecular charge transfer. Nucleophilic substitution process with loss of one fluorine atom was observed when pentafluorophenyl substituted benzo[ghi]perylene triimide and perylene diimide were heated in N , N -dimethylformamide, in which N , N -dimethylformamide acted both as solvent and nucleophile reagent. Unexpectedly, the obtained product exhibited significant intramolecular charge transfer optical properties in solutions. The mechanism of nucleophilic substitution and the influence of substituent were further studied and proposed in this manuscript.
研究领域:
有机化学
·
材料科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 103
·101645-101651
·
IF 3.289
Zelin Li,Dalei Yang,Xiaoli Zhao,Zidong Li,Tong Zhang,Fan Wu,Xiaoniu Yang
A water-soluble small-molecule perylene diimide derivative functionalized with a propylenetrimethylammonium end group, namely N,N-bis(propylenetrimethyl ammonium)-3,4,9,10-perylenediimide (PDI-N3I), was synthesized and successfully applied to conventional polymer solar cells as the cathode interlayer firstly. The small-molecule PDI-N3I showed excellent solubility in water and a desirable LUMO energy level of −4.09 eV which matches well with that of PC71BM. With incorporation of the PDI-N3I cathode interlayer, a PDI-N3I/Al device exhibited a higher PCE of 7.00% than that (6.54%) of a LiF/Al device resulting from the improved short current density from 10.41 mA cm−2 to 11.44 mA cm−2, which benefitted from the more efficient electron extracting ability of PDI-N3I compared with LiF proved by photoluminescence quenching experiment. The high vertical conductivity of PDI-N3I endows it with the outstanding property of thickness insensitivity, which is compatible with roll-to-roll production. Additionally, device performance was further improved by the use of a PDI-N3I/LiF bilayered cathode interlayer and the highest PCE of 7.18% was achieved. This work provides a novel solution-processed cathode interlayer material which could effectively improve the efficiency of polymer solar cells.
研究领域:
材料科学
·
光伏技术
·
有机电子学
·
高分子化学
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2024
·
IF 3.9
Xin Zhu,Lei Yang,Yangyang Pan,Yuqin Yang,Xuming Ding,Chuanming Wan,Zhuo Zhang,Yun Luo,Qinghai Zhou,Liwei Wang,Shengxiong Xiao
Graphical A conjugated molecular HBC-4-PDI with three-dimensional geometry is synthesized and applied as a non-fullerene acceptor material in the active layer of organic solar cells. Although fullerene derivatives such as [6,6]-phenyl-C 61 /C 71 -butyric acid methyl ester (PC 61 BM/PC 71 BM) have dominated the the photoactive acceptor materials in bulk heterojunction organic solar cells (OSCs) for decades, they have several drawbacks such as weak absorption, limited structural tunability, prone to aggregation, and high costs of production. Constructing non-fullerene small molecules with three-dimensional (3D) molecular geometry is one of the strategies to replace fullerenes in OSCs. In this study, a 3D molecule, contorted hexa- cata -hexabenzocoronene tetra perylenediimide (HBC-4-PDI), was designed and synthesized. HBC-4-PDI shows a wide and strong light absorption in the whole UV-vis region as well as suitable energy levels as an acceptor for OSCs. More importantly, the 3D construction effectively reduced the self-aggregation of c -HBC, leading to an appropriate scale phase separation of the blend film morphology in OSCs. A preliminary power conversion efficiency of 2.70 % with a champion open-circuit voltage of 1.06 V was obtained in OSCs with HBC-4-PDI as the acceptor, which was the highest among the previously reported OSCs based on c -HBC derivatives. The results indicated that HBC-4-PDI may serve as a good non-fullerene acceptor for OSCs.
研究领域:
材料科学
·
能源科学
·
有机光电
✓ 已验证
DOI
PubMed
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 1
·184
·
IF 4.6
Qirong Tian,Xinyang Sun,Chuan Li,Lei Shang,Rongna Ma,Xiaojian Li,Liping Jia,Shuijian He,Qian Zhang,Wei Zhang,Huaisheng Wang
Dopamine (DA) is an important catecholamine neurotransmitter and its abnormal concentration is closely related to diseases such as hypertension, Parkinson’s disease and schizophrenia. Due to the advantages of high sensitivity and fast response for electrochemiluminescence (ECL), developing ECL sensors for detecting DA was very critical in clinical diagnosis. ECL resonance energy transfer (ECL-RET) was an effective signaling mechanism. However, the shortage of highly efficient ECL-RET pairs impeded the development of DA sensors. Herein, methyl-modified perylene diimide derivative (PDI-CH3) self-assembly nanorod materials as luminophores and CuO nanomaterials as acceptors were integrated into nanocomposites. An obvious ECL-RET was found in PDI-CH3/CuO nanocomposites. After PDI-CH3/CuO nanocomposites were treated with DA, a large increase in ECL intensity was observed. Then, PDI-CH3/CuO nanocomposites were taken as an ECL platform to detect DA. This ECL sensor exhibited a linear response to DA from 10−12M to 10−8M with a limit of detection of 0.20 pM. Compared with other sensors for DA detection, the constructed ECL sensor exhibited higher sensitivity. In addition, the novel ECL sensor in this work showed good practicability in a human serum sample.
研究领域:
分析化学
·
生物医学工程
·
临床诊断
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yali Song,Xiaoyu Wen,Ziyan Li,Cairong Yang,Xiaojing Zhang,Long Huang,Yongpeng Ma,Qiong Wang,Hongzhong Zhang
g–C 3 N 4 / PDI–g–C 3 N 4 homojunction (CPCN–X) was prepared to effectively remove sulfamethoxazole (SMX) from water under visible light. The band of CPCN–X bent and the new flat band potential resulted in the generation of a built–in electric field at the contact interface between PDI–g–C 3 N 4 (CNPDI) and g–C 3 N 4 (CN). This facilitated interlayer charge migration, optimized the transportation efficiency of photoinduced electron pairs, and thereby boosted photocatalytic activity. CPCN–6 photocatalyst prepared with a mass ratio of 1:6 (CNPDI to CN) exhibited the highest photocatalytic activity, which can degrade 97.0 % of SMX after 90 min of visible light irradiation. The related degradation rate constant was calculated as 0.0371 min −1 , which was a 2.3 and 4.7 fold increase in comparison to CNPDI and CN, respectively. Free radical scavenging experiments revealed that ·O 2 − and h + were the predominant active materials for the photocatalytic decomposition of SMX by CPCN–6, while ·OH and 1 O 2 exhibited a relatively negligible contribution. It was found that CPCN–6 exhibited the potential to degrade sulfonamide antibiotics and the limited ability to remove atrazine and phenol in the visible light region due to the difference of redox properties and molecular structure.
研究领域:
环境科学
·
光催化
·
材料化学
·
水处理
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Dongyu Wang,Yujuan Pu,JuFeng Li,Yong Zhai,Qingwei Wang,Ligang Wang,Yunchuan Yang,Jisheng Geng,Quanwei Song,Jun Wang,Yongfa Zhu
Conventional free radical advanced oxidation processes are prone to inefficient mineralization and generation of toxic by-products due to the depletion of free radicals by non-target pollutants, and thus it is crucial to remove difficult-to-degrade organic pollutants efficiently and selectively in complex water bodies. Herein, we constructed a photochemical direct charge transfer elective oxidation/mineralization system based on peryleneimide supramolecular photocatalysts and variable-valent metal ions (PDI/M n+x ) to selectively oxidize and mineralize phenolic organic pollutants, achieving an 8–13-fold increase in the mineralization rate. Experimental and theoretical calculations elucidated the possible selectivity mechanism: the oxidation potentials of active species (photogenerated charge) and phenolic organic pollutants (PCs) in the system govern the oxidation kinetics and mineralization efficiency, and a typical negative correlation exists. Additionally, by leveraging the dyeing properties of PDI photocatalysts to load them onto white nonwoven fabrics, efficient degradation of organic pollutants in water under natural light conditions can be achieved. The system exhibits a mineralization capacity 2.3–4.7 times higher than that of the homogeneous Fenton system, along with lower treatment costs and comparable removal rates. This study provides a cost-effective solution for the purification of difficult-to-degrade organic pollutants in complex water bodies through non-radical pathways.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
DESIGNED MONOMERS AND POLYMERS
·
2019
·
IF 1.528
Shuang Li,Yazhen Wang,Liqun Ma,Xueze Zhang,Shaobo Dong,Li Liu,Xilai Zhou,Chenglong Wang,Zhen Shi
The reverse atom transfer radical polymerization (RATRP) of acrylonitrile (AN) was carried out in N, N-dimethylformamide (DMF) with AIBN as initiator, FeCl3•6H2O/triphenylphosphine (PPh3) and FeCl3•6H2O/pentamethyldle-thylenetrlamlne (PMDETA) as catalytic systems, respectively. Effect of reaction time and initiator concentration on polymerization rate, molecular weight and molecular weight distribution were investigated in detail. The Fourier transform infrared spectrometer (FTIR) and 1H nuclear magnetic resonance spectroscopy (1HNMR) were employed to analyze the chain end of the PAN. Gel permeation chromatography (GPC) was applied to measure the molecular weight and polydispersity index (PDI) of PAN. The polymerization demonstrated a typical pseudo first-order kinetics characteristics as evidenced by the number-average molecular weights (Mn) increasing linearly with monomer conversion; the Mn decreasing with the increasing of the initiator concentration. Meanwhile, the low PDI value (<1.2) indicated the controllability of polymerization.
研究领域:
高分子化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Cell Reports
·
2022
·
IF 9.995
Xinyu Li,Jiasheng Li,Di Zhu,Ning Zhang,Xusheng Hao,Wenfeng Zhang,Qian Zhang,Yangli Liu,Xueying Wu,Ye Tian
Summary Coordination of inter-tissue stress signaling is essential for organismal fitness. Neuronal mitochondrial perturbations activate the mitochondrial unfolded-protein response (UPR mt ) in the intestine via the mitokine Wnt signaling in Caenorhabditis elegans . Here, we found that the protein disulfide isomerase PDI-6 coordinates inter-tissue UPR mt signaling via regulating the Wnt ligand EGL-20. PDI-6 is expressed in the endoplasmic reticulum (ER) and interacts with EGL-20 through disulfide bonds that are essential for EGL-20 stability and secretion. pdi-6 deficiency results in misfolded EGL-20, which leads to its degradation via ER-associated protein degradation (ERAD) machinery. Expression of PDI-6 declines drastically with aging, and animals with pdi-6 deficiency have decreased lifespan. Overexpression of PDI-6 is sufficient to maintain Wnt/EGL-20 protein levels during aging, activating the UPR mt , and significantly extending lifespan in a Wnt- and UPR mt -dependent manner. Our study reveals that protein disulfide isomerase facilitates Wnt secretion to coordinate the inter-tissue UPR mt signaling and organismal aging.
研究领域:
分子生物学
·
衰老研究
·
细胞信号传导
·
发育生物学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）