Green Synthesis and Catalysis
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2022
·
IF 0
Lu Liu,Kaixun Dong,Mehdi Hassan,Weitao Gong,Jingnan Cui,Guiling Ning
Carbazole-based conjugated microporous polymers (CMPs) as a new type of advanced porous material have created tremendous research curiosities in the area of photocatalysis. Besides, introducing boron-containing dyes into the CMPs framework was rare but will be rather promising due to their unique properties, including strong electron-accepting capability, efficient catalytic behaviour, significant absorption coefficient and high quantum. Herein, we rationally designed and prepared two new CMPs, i.e. Cz-BF 2 -CMP and Cz-BPh 2 -CMP with the combination of carbazole and boron-containing dye as electron donor and acceptor motifs, respectively. Due to the efficient D-A effect between carbazole and boron-dye which not only accelerated the interfacial charge transfer efficiency but also improved the separation capability of photogenerated electron-hole pairs, both CMPs exhibited excellent photocatalytic performances in organic transformations such as green synthesis of benzimidazole in aqueous solution and aerobic oxidation of thioether in EtOH.
研究领域:
材料科学
·
光化学
·
有机合成
✓ 已验证
DOI
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 41
·16385-16390
·
IF 3.069
Qian Xu,Ying Gao,Xiaofu Wu,Hao Hang,Hua Li,Yonghong Chen,Weijie Wang,Hui Tong
Two subphthalocyanine (SubPc)-based conjugated porous polymers, SubPc-P1 and SubPc-P2, have been designed and synthesized by an A3 + B2 and A4 + B2 type Sonogashira cross-coupling reaction, in which axial coupling is absent and present, respectively. These two polymers exhibit Brunauer–Emmett–Teller surface areas of 434 m2 g−1 and 106 m2 g−1, respectively. Combining their porosity with strong light harvesting capability, SubPc-P1 and SubPc-P2 can efficiently absorb long-wavelength photons even in the near-infrared region to generate singlet oxygen rapidly. In addition, compared with SubPc-P2, SubPc-P1 shows red-shifted light absorption and a larger specific surface area, which agrees well with the better singlet oxygen generation ability upon irradiation at 690 nm.
研究领域:
材料科学
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光化学
·
生物医学工程
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Chaoyang Song,Junqi Nie,Chao Ma,Cuifen Lu,Feiyi Wang,Guichun Yang
1,2,3-Triazole contained conjugated porous polymers (CPPs) have recently emerged as a new class of efficient photocatalysts. To gain more insight into the excellent photocatalytic activity of this kind of CPPs, herein, we report the design and preparation of a series of 1,2,3-triazole-based CPPs via oxidative coupling polymerization to study their photocatalytic performance. These CPPs have donor-acceptor properties and 1,2,3-triazole serves as an electron acceptor. The resulting CPPs with thiophene, carbazole and diphenylamine as electron donor units, respectively, have distinct porosities and optoelectronic properties, and showed effective photocatalytic performance towards oxidative hydroxylation of arylboric acids and alkylation of vinylarenes with diethyl bromomalonate or bromoacetonitrile. The thiophene contained CPP was a more efficient photocatalyst for the catalytic reactions, which can be attributed to its smaller optical band gap and greater charge separation efficiency. Furthermore, PTPT has shown reliable recyclability with no significant loss in its catalytic activity.
研究领域:
材料科学
·
有机化学
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2016
·
IF 3.349
Tong-Mou Geng,Deng-Kun Li,Zong-Ming Zhu,Ye-Bin Guan,Yu Wang
The benzoquinone-based conjugated microporous/mesoporous polymers were synthesized through Sonogashira–Hagihara cross-coupling with tetrabromo-1,4-benzoquinone (TBrBQ) and 1,4-diethynylbenzene (DEB) by both solution polymerization (DBQP) and miniemulsion polymerization (DBQN). The Brunauer–Emmett–Teller (BET) surface areas of these polymers were 356 and 25 m 2 g −1 and pore average diameter were concentrated at around 2.12 and 3.84 nm for DBQP and DBQN, respectively. The two dimensional π-conjugated polymer frameworks could be combined with permanent microporous/mesoporous, luminescent properties and abundant oxygen atoms in the skeleton. Fluorescence studies found that both DBQP and DPQN could be utilized as fluorescent chemosensors for picronitric acid (PA) in acetone suspension.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xiao-Xing Wang,Lu Liu,Qi-Feng Li,Hua Xiao,Ming-Lin Wang,Hai-Chen Tu,Jin-Ming Lin,Ru-Song Zhao
Chloroquine phosphate (CQP) has been suggested as an important and effective clinical reliever medication for the 2019 coronavirus (COVID-19). Nevertheless, its excessive use will inevitably cause irreparable damage to the entire ecosystem, thereby posing a considerable environmental safety concern. Hence, the development of highly-efficient methods of removing CQP from water pollution sources, e.g., effluents from hospitals and pharmaceutical factories is significant. This study reported the fabrication of novel C N bond linked conjugated microporous polymers (CMPs) (BPT–DMB–CMP) with multiple nitrogen-rich anchoring sites for the quick and efficient removal of CQP from aqueous solutions. The irreversible covalent C N bond linked in the internal framework of BPT–DMB–CMP endowed it with good chemical stability and excellent adsorbent regeneration. With its predesigned functional groups ( i.e., rich N H bonds, triazine rings, and benzene rings) and large area surface (1,019.89 m 2 ·g −1 ), BPT–DMB–CMP demonstrated rapid adsorption kinetics (25 min) and an extraordinary adsorption capacity (334.70 mg·g −1 ) for CQP, which is relatively higher than that of other adsorbents. The adsorption behavior of CQP on BPT–DMB–CMP corresponded with Liu model and mixed-order model. Based on the density functional theory (DFT) calculations, X-ray photoelectron spectroscopy (XPS), and adsorption comparisons test, the halogen bonding, and hydrogen bonding cooperates with π − π, C H···π interactions and size-matching effect in the CQP adsorption system on BPT–DMB–CMP. The excellent practicability for the removal of CQP from real wastewater samples verified the prospect of practical application of BPT–DMB–CMP. BPT–DMB–CMP exhibited the application potentials for the adsorption of other antiviral drugs. This work opens up an efficient, simple, and high adsorption capacity way for removal CQP.
研究领域:
环境科学
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材料科学
·
公共卫生
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2021
·
IF 4.43
Xinxiu Cao,Ruiyuan Wang,Qi Peng,Hongwei Zhao,Hui Fan,Huan Liu,Qingquan Liu
Conjugated microporous polymers (CMPs) are potential materials for gas uptake, pollutant adsorption and photocatalysis . However, their relatively wide pore size distribution (PSD) makes it hard to establish the relationship between adsorption capacities and pore structure . Here, we synthesized two CMPs with similar chemical structure based on carbazole and ferrocene units. Poly[1,1′-di(9-carbazolyl)ferrocene] (PDCF) showed hierarchical pore structure with pore sizes distributed in three regions: 0.7–0.85 nm, 1–3 nm and 10–100 nm, while the pore sizes of poly{1,1′-di[4-(9-carbazolyl))phenyl]ferrocene} (PDCPF) were mostly less than 3 nm. The results of gas uptake and dye adsorption capacities show that the extra mesopores of PDCF exhibit better adsorption capacities to adsorbates with larger sizes. Besides, dye molecules adsorbed in the micropores are harder to desorption than that in the mesopores. The intermolecular forces between porous polymers and adsorbates were used to explain these results successfully. Our findings indicate that designing the right pore sizes for porous polymers when adsorbing gases or dyes with a specific molecules size is very important in the future.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Peiyang Gu,Feiyang Tan,Wuzi Zhao,Jingwen Dong,Shiyuan Zhou,Xiaoqiong Hao,Shengsheng Gu,Guangfeng Liu,Danfeng Wang
Photocatalysis has unprecedently prevailed in the removal of pollutants and the artificial photosynthesis of H 2 O 2. However, inefficient surface reaction and exciton dissociation rate are the main hurdles in arriving at high photocatalytic performance. A versatile strategy for improving surface reactions between the photocatalyst and the reactant and the charge separation dynamics is in pressing need. Herein, post-quaternization of the conjugated microporous polymer (CMP) is proposed. This not only converts the CMP from hydrophobic to hydrophilic but also evidently improves charge separation and mobility due to the polarizing effect. Most importantly, because of the quaternization, the surface reactions can be pronouncedly strengthened due to both the improved dispersity and lowering of O 2 adsorption energy. As a result, the CMPs serve both photodegradation and photosynthesis of H 2 O 2 , with iB-TDZ exhibiting pronounced enhancement in the photodegradation of 100 ppm of Congo red and 2,4-D in 40 min and 90 min, respectively, transcending the vast majority of the reported photocatalysts, while the production of H 2 O 2 reaches 2.922 mmol g −1 in three-hour irradiation. As a proof-of-concept experiment, simultaneous photodegradation of 2,4-D and photocatalytic H 2 O 2 production is realized. It was found that 2,4-D can boost photocatalytic H 2 O 2 production from 1.92 mmol g −1 (without 2,4-D) to 3.25 mmol g −1 within 90 min, likely due to its role in providing protons and serving as an h + scavenger. These findings provide a fresh platform for the design of CMP-based photocatalysts for simultaneous photocatalytic wastewater treatment and H 2 O 2 production.
研究领域:
环境科学
·
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Liang Xu,Yu Zang,Jiajun Xiao,Yunfeng Wu,Yuxue Pan,Tingting Wu,Yinshuang Tang,Jia Cui,Hongge Jia,Fengjuan Miao
Superhydrophobic conjugated microporous polymer-coated sponges ( CMP@sponges ) have been synthesized by the in-situ Sonogashira polymerization of monomers with multiple carboxyl or hydroxy functional groups in the presence of melamine sponges in a one-pot synthesis. The water contact angles of CMP@sponges are 150.38 and 153.92°, respectively. Unsupported CMP nanowires with diameters of 50–150 nm are synthesized successfully. CMP@sponges show excellent separation efficiency not only for oil/water mixtures including low-density oils that float and high-density oils that sink (such as gasoline, diesel and common organic solvents) but also for emulsified oils, which are much more difficult to separate with high efficiency (up to 99.81% for a toluene-water emulsion). The absorption capacities of CMP@sponges for oils are exceptionally high (55–122 and 38–94 g/g) and stable after 10 cycles. Judging from the excellent performance of CMP@sponges on oil/water separation, an ultrafast oil-removal setup has been designed that can be used to continuously collect floating oil at high speed and with a high separation efficiency (up to 10.2–16.3 mL/s). In addition, the recovery of palladium ions (Pd(II)) from organic palladium waste solutions by using CMP@sponges has been achieved, and 297 mg/g Pd(II) ions can be adsorbed. This is the first example of a CMP@sponges setup, which can continuously recover oils from oil/water mixtures with high efficiency and can also be used for recovering Pd(II) from organic solvents. The novel CMP@sponges show great application prospects for treating oil spills and heavy metal pollution.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 38
·25761-25772
·
IF 10.7
Zibin Li,Ya Chu,Fanpeng Meng,YunYun Dong,Jinsheng Zhao,Huayang Zhang,Xiujuan Zhong
Conjugated porous polymers (CPPs) incorporating donor–acceptor (D–A) structures are gaining significant interest for their potential in photocatalytic hydrogen evolution reaction (HER). The microstructure and electronic properties of the polymer frameworks are crucial for optimizing their photocatalytic efficiency. Here, we design two D–A type CPP photocatalysts using 4,8-di(thiophen-2-yl)benzo[1,2-b:4,5-b′]dithiophene (DBD) and triazine units to investigate the impact of different bridging units on HER activity. Compared with PhDBD–CPP using benzene as the bridging unit, ThDBD–CPP with a thiophene linking unit achieves an expansion of the HOMO orbital distribution and an enlarged molecular dipole moment, which is conducive to the efficient separation and migration of photogenerated carriers. Consequently, ThDBD–CPP with thiophene as the bridging unit exhibits a remarkable photocatalytic hydrogen evolution rate of 20.75 mmol h−1 g−1 under full arc light. After loading 1 wt% Pt cocatalyst, the HER activity is further improved to 30.36 mmol h−1 g−1. This study suggests that modulating bridging units provides a new viable approach to designing efficient polymer photocatalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2025
·
IF 2.6
Zhang Qingtang,Liang Chenli,Wang Zheng,Wang Xiaomei
It is a significant issue for lithium-ion batteries to develop hard carbon with high capacity and long cycling stability. Here, a sulfur-doped hard carbon (TT-SHC) is synthesized from thieno[3,2-b]thiophene-containing conjugated microporous polymers (TT-CMP), constructed from 1,3,5-triethynylbenzene and 3,6-dibromothieno[3,2-b]thiophene. TT-SHC is composed of nanoparticles in the range of 10–25 nm, with large pore volume, high specific surface area, and a sulfur content of 4.74 wt%. TT-SHC displays an initial specific charge capacity of 871.3 mAh g −1 at a current density of 100 mA g −1 . At 600 mA g −1 , TT-SHC delivers a charge capacity of 445.5 mAh g −1 after 300 cycles, being slightly higher than the initial capacity. Such a synthesis strategy provides a new insight for the design and preparation of hard carbon.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 32
·18098-18105
·
IF 3.049
Lamaocao Ma,Hengchang Ma
In this study, we report the synthesis of π-conjugated network polymers via palladium-catalyzed direct arylation polycondensation of triphenylamine (TPA) and tetraphenylethylene (TPE) with different active substrates. Moreover, six conjugated porous polymers were obtained (named as TPA-TPA-MA, TPA-PB-MA, TPA-TFB-MA, TPA-TPE-MA, TPE-PB-MA, and TPE-TFB-MA). Then, the fluorescence properties in the solid and dispersed states, the corresponding microporous structures, and the Brunauer–Emmett–Teller (BET) surface areas of all polymers were well studied. Among the obtained materials, TPA-PB-MA possessed not only largest BET surface area (686 m2 g−1) and largest pore volume (0.716 cm3 g−1), but also the smallest pore size of 0.823 nm. These properties are very beneficial for the application of TPA-PB-MA in CO2 storage and PA sensing. At 1 bar, TPA-PB-MA demonstrated the significant CO2 uptake of 2.70 and 1.35 mmol g−1 at 273 and 298 K, respectively. Furthermore, TPA-PB-MA was most sensitive and selective towards PA recognition. The KSV constant was measured as 4.0 × 104 M−1.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 33
·期 2
·584-590
·
IF 3.665
Li Wang,Wei Xie,Guangjuan Xu,Shuran Zhang,Chan Yao,Yanhong Xu
Two new thiophene-based conjugated microporous polymers (BTCMP-1 and BTCMP-2) were synthesized by cross-coupling polycondensation reaction of dithiophene derivatives, 1,4-phenylenediboronic acid and 1,2,4,5-tetrafluorobenzene. BTCMP-1 and BTCMP-2 display good physicochemical stability and outstanding CO 2 adsorption capacity (648 and 289 mg/g at 50 bar and 318 K, respectively). In addition, BTCMP-1 and BTCMP-2 exhibit high iodine adsorption of 480 and 284 wt%, respectively. BTCMP-1 has relatively loose accumulation and good porosity, which leads to higher iodine adsorption value of BTCMP-1 than that of BTCMP-2. The obtained thiophene-based conjugated microporous polymers are ideal materials for iodine capture and carbon dioxide capture.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）