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Effect and Mechanism of Solvent Properties on solution behavior and Films Condensed State Structure for the Semi-rigid Conjugated Polymers

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Chinese Journal of Polymer Science 2021年第7期39卷 796-814页

作者： Hao Zhang Tao Li Bin Liu Teng-Ning Ma Long Huang Ze-Ming Bai Dan Lu State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China

Solvents have an essential association with polymer solution ***,few researches have been deeply done on this *** recent years,our research group focus on the study on effect of solvent properties on solution behavior and film condensed state structure for semi-rigid conjugated polymer up till to apply for optoelectronic ***,influence of solvent properties including solubility of solvent,aromaticity,polarity and hydrogen bonds on semi-rigid polymer chain solution behavior,i.e.,single chain conformation,chain shape,size and chains aggregated density were studied by means of static/dynamic laser light scattering(DLS/SLS)and exponential law *** of solvent properties on condensed state structure of the semi-rigid conjugated polymer film was studied by UV absorption spectroscopy,PL spectroscopy and electron microscopy *** essential reasons for the influence were discovered and the mechanism was *** was found that solution behavior with different solvent properties had an essential physical relationship with chains condensed state structure of the semi-rigid conjugated *** importantly,there was a quantitative structure-activity relationship between solution and *** key to this relationship depended on the interaction between solvent molecules and the semi-rigid conjugated polymer *** interaction could also affect optoelectronic devices *** study is of great significance to effectively control the condensed state structure of the semirigid conjugated polymers in the process of dynamic evolution from solutions to *** not only enriches the knowledge and understanding of both semi-rigid conjugated polymer solution behaviors and film condensed state physics based on polymer physics,but also is meaningful to practical application for conjugated polymer and other traditional polymer systems.

关键词： Semi-rigid conjugated polymer solution behavior Solvents Condensed state structure Optoelectronic performance

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Based on the Second Virial Coefficient(A2)to Study Effect of the Synergistic Action of Solvent and External Electric Field on the solution behavior and Film's Condensed State Structure

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Chinese Journal of Polymer Science 2022年第5期40卷 478-490页

作者： Ya-Nan Guo Hao Zhang Bin Liu Dan Lu State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China

The solventnatures are crucial to deeply reveal solution behavior of macromolecular chains,physical essence of condensed state structures formation of the film as well as the photoelectronic devices *** on the second virial coefficient(A2),effect of the synergistic action of solvents and external electric field on both solution behavior and the film’s condensed state structure for the semi-rigid conjugated polymer,poly[2-methoxy-5-(2’-ethylhexoxy)-1,4-phenylvinylene](MEH-PPV)was investigated by dynamic/static light scattering,photoluminescence spectroscopy and transmission electron microscopy,*** was found that although the MEH-PPV solutions with different solvents(toluene,chlorobenzene,chloroform and tetrahydrofuran)all could generate a response to the external electric field,the degree of response varied significantly with the change of solvent ***,ordered degree of the film from the solutions was also obviously *** essential reason for this responsive difference was firstly revealed in the research,which actually depended on the degree of interaction between the solute and solvent,and this degree of interaction could be quantitatively described by the second virial coefficient(A2).The bigger the A2,the stronger the interaction between solvent and solute in the solution,and the stronger the response to the external electric ***,under the induction of external electric field,chains aggregations with different sizes were formed accompanied by large-scale chains ordered structure in the *** ordered structure not only can effectively transfer to film prepared by the precursor solution but also is beneficial to enhance the carrier mobility and device efficiency of the photoelectronic film.

关键词： Semi-rigid conjugated polymer External electric field Second virial coefficient solution behavior Condensed state structure

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Study on effect of feed ratio on controlled cross-linking polymerization process

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Journal of Chemistry and Chemical Engineering 2007年第1期1卷 27-39页

作者： LI Fang-xing YANG Jin-dong SUN Rui-min REN Jin-yun ZHONG Lu-wei LIU Dong-ping CHEN Jun YU Fang-fei Department of Chemistry Nankai University Tianjin 300071 China

A controlled cross-linking polymerization containing intra- and intermolecular reactions was designed based on random coil morphology of macromolecules in solution. The soluble intramolecular cross-linked maeromolecule （ICM） was successfully synthesized in the system with PVA and MDI. We found an especial dissolving phenomenon, namely the semi-soluble phenomenon when some gels dissolved in DMF. The chain growth process of ICMs was investigated by Transmission electron microscopy （TEM） pictures of samples at different reacting times, in addition, TEM pictures show ICMs have three kinds of styles in structure, viz. ＂globule structure＂, ＂nubby structure＂ and the intervenient between the above two structures, and the efflux time of the ICMs was measured by an Ubbelohde viscosimeter, it was found that the efflux time decreases with the degree ofcrosslink increasing.

关键词： intramolecularly cross-linked macromolecule cross-linking solution behavior dynamic light scattering

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Synthesis and characterization of Na4(NH4)2[(Ta6O19)Co(H2O)3]·20 H2O

Synthesis and characterization of Na4(NH4)2[(Ta6O19)Co(H2O)3...

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河南省化学会2018年学术年会

作者： Zhijie Liang Pengtao Ma Jingyang Niu Henan Key Laboratory of Polyoxometalate Chemistry Institute of Molecular and Crystal EngineeringCollege of Chemistry and Chemical EngineeringHenan University

Polyoxometalates are a diverse family of anionic metal-oxygen clusters constructed mainly by early transition metals(V,Nb,Ta,Mo,W)in high oxidation states exhibiting an vast range of structural diversity,and their application in many ***,after nearly 64 years of polyoxotantalate research,Ta-based polyoxometalate chemistry is still at its infant ***,we successfully synthesized monomeric Co-complex-supported polyoxotantalate via a facile one-pot approach,[(TaO)Co(HO)](1a)(Figure 1),which was isolated as Na(NH)-1a·20HO(1).Detailed crystallographic analysis reveals that 1a consists of one{TaO}unit as a tridentate ligand coordinated to one{CoO}moiety by threeμ-oxygen ***,the solution behavior of 1 was investigated by electrospray ionization mass spectrometry(ESI-MS)and the intact parent cluster can be observable in water,indicating the stability of the cluster.

关键词： polyoxotantalate Tridentate ligand solution behavior

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