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An Alternating Polymer of Two Building Blocks Based on B←N Unit:Non-fullerene Acceptor for Organic Photovoltaics

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Chinese Journal of Polymer Science 2017年第2期35卷 198-206页

作者： Ru-yan Zhao 窦传冬刘俊 li-xiang wang State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Chinese Academy of Sciences Beijing 100049China

B-N coordination bond can be used to develop polymer electron acceptors for efficient all-polymer solar cells （all-PSCs）. Here, we report a new alternating conjugated polymer containing two building blocks based on B-N unit. The polymer exhibits strong light absorption in the visible range, low-lying LUMO/HOMO energy levels and moderate electron mobility. The resulting all-PSC devices exhibit power conversion efficiencies of 1.50%-2.47%.

关键词： All-polymer solar cells Polymer acceptor Boron B-N coordination bond

Acceptor-acceptor-type Organoboron Conjugated Polymers:Effect of Backbone Configuration on Thermoelectric Performance

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Chinese Journal of Polymer Science 2023年第1期41卷 108-116页

作者： Chang-Shuai Dong Bin Meng Jun liu li-xiang wang State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China University of Science and Technology of China Hefei230026China

The development of n-type polymer thermoelectrics lags far behind that of p-type ones in view of material diversity and *** structural insights into the thermoelectric performance are needed for efficient n-type polymer thermoelectric ***,we developed three acceptor-acceptor type organoboron polymers and investigated the effect of backbone configuration on thermoelectric *** three polymers are designed based on double B←N bridged bipyridine(BNBP)unit with monomeric thieno[3,4-c]pyrrole-4,6-dione(TPD),TPD dimer and TPD trimer as the copolymerizing units,*** three polymers show similar low LUMO energy levels but different backbone *** with the wavy backbone configuration,the pseudo-straight backbone configuration imparts the polymer with much enhanced crystallinity and electron *** a result,after n-doping,the polymer with pseudo-straight configuration shows much higher electronic conductivity and power *** think these findings could serve as important guidelines for molecular design toward efficient n-type polymer thermoelectric materials.

关键词： Organoboron polymers Acceptor-acceptor type conjugated polymers n-Type polymer thermoelectrics n-Doping

Androgen and meibomian gland dysfunction:from basic molecular biology to clinical applications

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International Journal of Ophthalmology(English edition) 2021年第6期14卷 915-922页

作者： li-xiang wang Ying-Ping Deng Department of Ophthalmology West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina

Meibomian gland,the largest sebaceous gland of the body,is responsible for the biosynthesis of lipid layer of the tear film to prevent excessive *** loss of normal functions of meibomian gland,known as meibomian gland dysfunction(MGD),is a chronic disease and is the leading cause of dry eye symptoms in the *** have found sex hormones,especially androgen,play vital roles in the regulation of the functions of meibomian ***,androgen has also been preliminarily applied in clinics for the treatment of MGD and showed promising results,especially in people with endogenous androgen *** review summarized the mechanisms of the function of androgen on meibomian gland based on molecular,animal,and clinical studies,and proposed evidence-based views about its potential applications for the treatment of MGD.

关键词： meibomian gland dysfunction androgen dry eye disease

A Cyano-Substituted Organoboron Electron-deficient Building Block for D-A Type Conjugated Polymers

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Chinese Journal of Polymer Science 2023年第5期41卷 832-838,I0012页

作者： Meng-Yu liu Xing-Xin Shao Jun liu li-xiang wang State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China

The development of donor-acceptor(D-A)type conjugated polymers depends largely on the design of novel A building ***,we report a novel A building block based on the cyano-substituted organoboron unit(SBN-3).Compared with the most common fluorine-substituted B←N unit,SBN-3 displays a significantly downshifted LUMO energy level because of the strong electron-withdrawing ability of cyano *** addition,due to the greater impact of cyano substitution on LUMO than on HOMO,SBN-3 exhibits a reduced band gap,nearinfrared absorption and fluorescence *** D-A type conjugated polymers based on the cyano-substituted B←N unit with thiophene-based units show narrow optical band gaps of ca.1.3 e V as well as distinctive electronic structures,i.e.,delocalized LUMOs and localized *** work thus provides not only an effective approach to design strong A units but also a new electron-deficient building block for D-A type conjugated polymers.

关键词： Cyano-substituted B←N unit Building block Narrow band gap D-A type conjugated polymers

15%Efficiency All-Polymer Solar Cells Based on a Polymer Acceptor Containing B←N Unit

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Chinese Journal of Polymer Science 2022年第8期40卷 989-995,I0011页

作者： Ying-Ze Zhang Ning wang Ying-Hui wang Jun-Hui Miao Jun liu li-xiang wang State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei230026China

The development of new polymer acceptors strongly paves the power conversion efficiency(PCE)improvement of all polymer solar cells(all-PSCs).Herein,we develop a new polymer acceptor PBN26,which is the alternating copolymer of 2,2′-((2Z,2′Z)-((12,13-bis(2-octyldodecyl)-3,9-diundecyl-12,13-dihydro-[1,2,5]thiadiazolo[3,4-e]thieno[2″,3″:4′,5′]thieno[2′,3′:4,5]pyrrolo[3,2-g]thieno[2′,3′:4,5]thieno[3,2-b]indole-2,10-diyl)bis(methanylylidene))bis(3-oxo-2,3-dihydro-1 H-indene-2,1-diylidene))dimalononitrile and B←N bridged thienylthiazole(BNTT).The optimized all-PSCs device based on PBN26 exhibits a PCE of 15.09%,which is the highest value of the all-PSCs based on B←N-based polymer acceptors at ***,we also fabricate an all-PSC module with active area of 10 cm2 by blade coating,which exhibits a PCE of 8.78%.These results prove that polymer acceptors containing B←N units are promising for all-PSC device applications.

关键词： Organic photovoltaic All-polymer solar cells Polymer acceptors Boron-nitrogen coordination bond

New applications of poly(arylene ether)s in organic light-emitting diodes

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Chinese Chemical Letters 2016年第8期27卷 1201-1208,1466页

作者： Shi-Yang Shao Jun-Qiao Ding li-xiang wang State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of Sciences

Compared with conventional π-conjugated polymers,poly（arylene ether）s（PAEs） may take advantages of excellent thermal properties,well-defined effective conjugated length and no catalyst ***,their applications have been extended from engineering plastics to optoelectronic *** this review,various kinds of functional PAEs used as fluorescent polymers,host polymers and phosphorescent polymers in organic light-emitting diodes（OLEDs） are outlined,and their molecular design,synthesis and device performance are overviewed.

关键词： Poly(arylene ether)s Organic light-emitting diodes Fluorescent polymers Host polymers Phosphorescent polymers

Special Issue:Organic Photovoltaic Polymers

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Chinese Journal of Polymer Science 2022年第8期40卷 843-843,I0005页

作者： Yongfang li Hong-Zheng Chen Jian-Hui Hou li-xiang wang 机构不详

Organic photovoltaic devices(OPVs)show promise as the next-generation clean-energy technology with diverse applications,due to their unique merits of low-cost production with solution processability,light-weight,ultra-flexibility,good visible transparency for solar windows,aesthetic with vivid color,*** the discovery of photovoltaic effect by sandwiching the Anthracene with electrodes,the OPVs has drawn more and more *** the most recent years,comprehensive research on materials design,interface modification,morphology control,device structure design,etc.,leads to the rapid progress in OPV.

关键词： transparency visible sandwich

Removal of Cr from tannery sludge by bioleaching method

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Journal of Environmental Sciences 2006年第5期18卷 885-890页

作者： ZHOU Shun-gui ZHOU li-xiang wang Shi-mei FANG Di College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing 210095 China

Bioleaching of Cr（Ⅲ） from tannery sludge using the mixture of ingenuous iron- and sulfur-oxidizing bacteria was investigated in batch flasks. Experiments involved the adaptation of indigenous iron-and sulfur-oxidizing bacteria, the pre-acidification the sludge to pH 6.0 and the addition of energy substrates. Results showed the inoculation of mixture of ingenuous iron- and sulfur-oxidizing bacteria and co-addition of Fe^2 and elemental sulfur accelerated acid production and increase of oxidation-reduction potential originating from the bio-oxidation of Fe2^＋ and elemental sulfur. Dissolved Cr concentration increased concomitant with pH decreased in the sludge and reached its maximum removal of 95.6%. The amelioration of the odor of bioleached sludge could be noted. However, 20.4%o of N, 24.5% of P and 14.3% of organic matter were lost in the bioleaching process. The residual Cr content in the leached tannery sludge was acceptable for use in agriculture. This study had shown the feasibility of applying the bioleaching process, developed for sewage sludge, to tannery sludge with high Cr.

关键词： tannery sludge: Cr: removal: bioleaching

Proton Irradiation Effects on the Structural and Tribological Properties of Polytetrafluoroethylene

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Chinese Journal of Polymer Science 2016年第12期34卷 1448-1455页

作者：刘百幸 Jun liang Zhen-jun Peng xiang-li wang State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of Sciences Key Laboratory for Electronic Materials of the State Ethnic Affairs Commission College of Electric EngineeringNorthwest University for Nationalities

Polytetrafluoroethylene （PTFE） was irradiated with protons in a ground-based simulation facility to study the effects of proton irradiation on the structural and tribological properties of PTFE. The structural changes were characterized by X-ray photoelectron spectroscopy （XPS） and attenuated total-reflection FTIR （ATR-FTIR）, while the tribological properties were evaluated by friction and wear tests. It was found that proton irradiation induced the degradation of PTFE molecular chains, resulting in the increase of C concentration and the decrease in F concentration on the sample surfaces, and the surface chemical structure and morphology of the samples changed, which affected the friction coefficient and decreased the wear rate of the specimens as the friction and wear tests revealed.

关键词： Polytetrafluoroethylene Proton irradiation Degradation Friction and wear.