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Synthesis, Characterization, and Field-Effect Transistors Properties of Novel Copolymers Incorporating Nonplanar Biindeno[2,1-b]thiophenylidene Building Blocks

08-Apr-2015 | Chao Li; Zupan Mao; Huajie Chen; Liping Zheng; Jianyao Huang; Bin Zhao; Songting Tan; Gui Yu, Macromolecules, 2015

A nonplanar but conjugated heteroacene, biindeno[2,1-b]thiophenylidene (BTP), is employed to design and synthesize solution-processable polymer semiconductors for organic field-effect transistors (OFETs) applications first. By copolymerizing with isoindigo (IDG), diketopyrrolopyrrole (DPP), and ...


Conjugation-Break Spacers in Semiconducting Polymers: Impact on Polymer Processability and Charge Transport Properties

01-Apr-2015 | Yan Zhao; Xikang Zhao; Yaping Zang; Chong-an Di; Ying Diao; Jianguo Mei, Macromolecules, 2015

Conjugation-break spacers (CBSs) are intentionally introduced into the diketopyrrolopyrrole (DPP)-based polymer backbones. We reveal that the solution processability progressively increases with the percentage of CBSs, while charge mobility inversely varies to the CBS ratio. For instance, the ...


Angular-Shaped 4,9-Dialkylnaphthodithiophene-Based Donor–Acceptor Copolymers for Efficient Polymer Solar Cells and High-Mobility Field-Effect Transistors

30-Mar-2015 | Sheng-Wen Cheng; Che-En Tsai; Wei-Wei Liang; Yung-Lung Chen; Fong-Yi Cao; Chain-Shu Hsu; Yen-Ju Cheng, Macromolecules, 2015

Although the tetracyclic angular-shaped naphthodithiophenes (aNDTs) derivatives are an emergent building block for constructing promising semiconductor conjugated polymers, the absence of aliphatic side chains as solubilizing groups on the aNDTs greatly restricted their further application toward ...


Amine-Functionalized CO2 Responsive Triblock Copolymer Micelles—A Small-Angle X-ray Scattering Study

27-Mar-2015 | Stefan Salentinig; Phil Jackson; Adrian Hawley, Macromolecules, 2015

CO2 responsive colloids are of interest for the delivery of active molecules in both pharmaceutical applications and for gas treatment technologies, among others. Primary and secondary organic amines react with CO2 gas in aqueous solution to form ionic carbamates in an exothermic “CO2 ...


Fluorescent Microporous Polyimides Based on Perylene and Triazine for Highly CO2-Selective Carbon Materials

19-Mar-2015 | Yaozu Liao; Jens Weber; Charl F. J. Faul, Macromolecules, 2015

Carbon dioxide (CO2) capture from point sources like coal-fired power plants is a potential solution for stabilizing atmospheric CO2 content to avoid global warming. Sorbents with high and reversible CO2 uptake, high CO2 selectivity, good chemical and thermal stability, and low cost are desired ...


Crystallization of Poly(2-isopropyl-2-oxazoline) in Organic Solutions

03-Mar-2015 | Natalia Oleszko; Alicja Utrata-Wesołek; Wojciech Wałach; Marcin Libera; Anna Hercog; Urszula Szeluga; Marian Domańsk ..., Macromolecules, 2015

The crystallization of polymers from organic solvents is a common phenomenon. Poly(2-isopropyl-2-oxazoline) (PIPOx) is known to crystallize in aqueous or aqueous/organic solvent solutions. This process is associated with the dehydration of polymer chains above the polymer’s lower critical ...


BCC Grain Formation Triggered by Miscibility Jump on Temperature Drop

02-Mar-2015 | Akifumi Matsushita; Shigeru Okamoto; Eiko Tamura; Tadashi Inoue, Macromolecules, 2015

Formation of a body-centered cubic (BCC) structure and grain growth process triggered by segregation-power jump on a temperature drop was studied by small-angle X-ray scattering (SAXS), rheology, and differential scanning calorimetry (DSC). Polystyrene-block-poly(ethylene-alt-propylene) (SEP) was ...


Viscoelasticity of Poly(ethylene glycol) Solutions on Supported Lipid Bilayers via Quartz Crystal Microbalance with Dissipation

02-Mar-2015 | Ziliang Zhao; Xiangling Ji; Rumiana Dimova; Reinhard Lipowsky; Yonggang Liu, Macromolecules, 2015

Supported lipid bilayers of 1,2-dioleoyl-sn-glycero-3-phosphocholine were formed on a silicon oxide substrate, and the viscoelasticity of poly(ethylene glycol) (PEG) solutions above the bilayer was subsequently studied by quartz crystal microbalance with dissipation monitoring. No detectable ...


The Origin of the Slow Mode in Dilute Aqueous Solutions of PEO

27-Feb-2015 | Jianqi Wang, Macromolecules, 2015

Besides the fast translational diffusion of individual chains, a slow relaxation mode is frequently observed in dilute poly(ethylene oxide) (PEO) aqueous solutions in dynamic laser light scattering (LLS) experiments, which was attributed to some hydrophobic impurities in PEO or interchain ...


Ring-Opening Metathesis Polymerization of a Diolefinic [2]-Catenane–Copper(I) Complex: An Easy Route to Polycatenanes

27-Feb-2015 | José Augusto Berrocal; Louis M. Pitet; Marko M. L. Nieuwenhuizen; Luigi Mandolini; E. W. Meijer; Stefano Di Stefano, Macromolecules, 2015

A dilute (30 mM) dichloromethane solution of the copper(I) complex 1·Cu+ of a [2]-catenane composed of two identical 28-membered macrocyclic alkenes featuring a phenanthroline moiety in the backbone was subjected to ring-opening metathesis polymerization (ROMP) with second-generation Grubbs ...


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