MACROMOLECULAR CHEMISTRY AND PHYSICS
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2012
·Vol. 213
·期 14
·1435-1440
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IF 2.361
Dazhi Tan,Wenjie Fan,Wannan Xiong,Hanxue Sun,Yaqi Cheng,Xiaoyu Liu,Changgong Meng,An Li,Wei-Qiao Deng
Two-dimensional conjugated microporous polymers (CMPs) composed of alternative phenylene and ethynylene units are synthesized, by cross-coupling polymerization of 1,3,5-triethynylbenzene and 1,3,5-tribromobenzene with various solvents. Our work shows that the morphology of CMPs is greatly affected by the choice of solvents used in synthesis. Sphere, tubular, and plate-like structures are received by using the toluene, p-xylene, and mesitylene solvents, respectively. Our results demonstrate that the morphology of CMPs affects the storage capacity for organic solvents remarkably, with the plate-like CMP showing best performance. This work is expected to provide useful guidance to rationally design CMPs as absorbent materials for organic solvents.
研究领域:
高分子化学
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材料科学
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纳米科技
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吸附分离
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DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 100
·97783-97790
·
IF 3.289
Ying Sun,Qizan Huang,Xueqin Zhang,Xiaojing Ding,Pei Han,Baoping Lin,Hong Yang,Lingxiang Guo
In recent years, side chain engineering has been proven to play a critical role in the development of high performance conjugated polymers for organic electronics. Here, we report a new strategy to improve charge transport property through side chain functionalization. A series of carbazole–diketopyrrolopyrrole based conjugated polymers P1, P2 and P3 with different side chains have been designed and synthesized. For P2 and P3, a pyrene and carbazole unit were incorporated into the terminal of the alkyl side chain, respectively. Thermal properties, crystallinities, UV-vis absorptions, electrochemical properties as well as charge transport properties of the polymers were investigated in detail. Interestingly, results showed that incorporation of the fused aromatic ring into the side chain terminal not only changed the absorption and electrochemical properties, but also affected the charge transport properties. The pyrene and carbazole group in the side chain terminal significantly promoted aggregation of the polymer chains, which would provide short-range order for improved charge carrier mobility. Compared to the hole mobility (0.019 cm2 V−1 s−1) for polymer P1 with the whole alkyl chains, increased hole mobilities of 0.081 cm2 V−1 s−1 and 0.052 cm2 V−1 s−1 were achieved for polymer P2 and polymer P3, respectively. It is worthy to note that our strategy gives rise to no increment of the crystallinity of the polymer, being beneficial for the practical application of soft electronics since high crystallinity of the material usually leads to poor thin film uniformity and weak mechanical resilience. In this respect, we offer a promising tool to aid rational polymer design for enhanced charge transport property.
研究领域:
高分子化学
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有机电子学
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材料科学
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半导体材料
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光电功能材料
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DOI
高影响因子
MATERIALS LETTERS
·
2016
·
IF 2.437
Bin Xu,Tao Ding,Yongcai Zhang,Yaoting Wen,Zhanjun Yang,Ming Zhang
This communication reports the development of a new efficient visible-light-driven composite photocatalyst comprising ZnFe 2 O 4 nanoparticles and conjugated polymer (CPVC) from the dehydrochlorination of polyvinyl chloride (PVC). ZnFe 2 O 4 /CPVC nanocomposites were synthesized via three main steps: (i) the synthesis of ZnFe 2 O 4 nanoparticles by a sol-gel method; (ii) the adsorption of PVC in tetrahydrofuran solution by ZnFe 2 O 4 nanoparticles to form ZnFe 2 O 4 /PVC nanocomposites; and (iii) the dehydrochlorination of PVC in the ZnFe 2 O 4 /PVC nanocomposites by heating at 150 °C for 2 h. X-ray diffraction, Fourier transform infrared spectroscopy and high-resolution transmission electron microscopy characterization revealed that the as-synthesized product was core/shell structured ZnFe 2 O 4 /CPVC nanocomposites. The photocatalytic results demonstrated that the ZnFe 2 O 4 /CPVC nanocomposites had much higher photocatalytic activity than ZnFe 2 O 4 nanoparticles in the reduction of aqueous Cr(VI) under visible-light (λ>420 nm) irradiation. Thus, ZnFe 2 O 4 /CPVC nanocomposites are promising for use as a new efficient visible-light-driven photocatalyst .
研究领域:
材料科学
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环境化学
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纳米技术
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光催化
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高分子化学
✓ 已验证
DOI
高影响因子
Russian Journal of Physical Chemistry A
·
2016
·Vol. 90
·期 2
·399-405
·
IF 0.597
Wang Aiqing,Cui Yuezhi,Tao Furong,Gu Caihong,Wang Shijie,Li Tianduo
A functionalized glass sensor ( G-P ) was prepared for detecting nitroaromatic compounds (NACs) by chemically immobilizing a conjugated polymer P on the surface of a glass slide. The monolayer film sensor had several advantages: the signal amplification effect of conjugated polymers, no leakage of sensing materials in solution, and good permeability for the analytes. Fluorescence quenching studies demonstrated that the sensor was highly sensitive to NACs. When the DNT concentration was 1.03 × 10 –7 mol/L, the quenching efficiency (1– I / I
0 ) of G-P reached 52.8%. Moreover, the excellent properties of reversibility, selectivity and sensitivity indicated the glass G-P might be a promising sensor in the field of explosives detection.
研究领域:
分析化学
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材料科学
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传感器技术
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环境监测
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安全检测
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高分子化学
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光学传感
✓ 已验证
DOI
高影响因子
SYNTHETIC METALS
·
2013
·
IF 2.109
Lu Xiao,Jun Yuan,Yingping Zou,Bo Liu,Jinzhi Jiang,Yan Wang,Lihui Jiang,Yong fang Li
A new donor–acceptor conjugated polymer (PBDTPO-FBT), which consists of a fluorinated benzothiadiazole (FBT) electron-acceptor unit and an electron-donor segment of alkoxylphenyl substituted benzo[1,2-b:4,5-b′]dithiophene (BDTPO), was synthesized according to the Stille cross-coupling reaction. The resulting copolymer was characterized by TGA , GPC , UV–vis absorption spectroscopy and cyclic voltammetry measurements. PBDTPO-FBT possesses good thermal stability with 5% weight loss temperature of 410 °C and shows broad absorption at 300–800 nm with an optical bandgap of 1.53 eV. Cyclic voltammetry measurement exhibits HOMO and LUMO energy levels of −5.43 eV and −3.72 eV, respectively. The hole mobility of PBDTPO-FBT:PC 71 BM (1:1, w/w) reaches up to 3.8 × 10 −3 cm 2 /V/s by the space-charge-limited current (SCLC) method. By using 3% 1,8-diiodooctane (DIO) as the solvent additive, the polymer solar cell with the configuration of ITO/PEDOT:PSS/PBDTPO-FBT:PC 71 BM (1:1, w/w)/Ca/Al demonstrates a power conversion efficiency of 2.70% with V oc = 0.70 V, J sc = 7.23 mA/cm 2 and FF = 47.08%, under the illumination of AM 1.5 G, 100 mW/cm 2 .
研究领域:
高分子化学
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材料科学
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有机电子学
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太阳能电池
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光电转换
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DOI
高影响因子
Sustainable Energy & Fuels
·
2018
·Vol. 2
·期 10
·2154-2159
·
IF 0
Xing Guo,Bingjuan Zhang,Zhenhua Lin,Jie Su,Zhou Yang,Chunfu Zhang,Jingjing Chang,Shengzhong (Frank) Liu,Yue Hao
The electron/hole transport layer plays a very important role in the planar structure of perovskite solar cells. Conjugated polymers have received considerable attention for use in perovskite solar cells as hole/electron transport layers and passivation layers. Although the devices based on conjugated polymer hole transport layers have achieved much progress, their performance is still inferior to that of devices based on the conventional spiro-OMeTAD hole transport layer. Here, we investigated the solvent vapor annealing (SVA) effect on conjugated polymers as well as the corresponding perovskite solar cell devices. It was found that SVA treatment could enhance the hole charge carrier mobility and thin film crystallinity. Meanwhile, the charge transfer efficiency was enhanced, and charge recombination was reduced. Hence, the conjugated polymer based device exhibited comparable or even better performance compared with the conventional spiro-OMeTAD based device. Moreover, the device stability was also improved.
研究领域:
材料科学
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光伏技术
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纳米科技
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表面与界面化学
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凝聚态物理
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能源材料
·
器件物理
✓ 已验证
DOI
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