Electrochemical synthesis, characterization and electrochromic properties of indan and 1,3-benzodioxole-based poly(2,5-dithienylpyrrole) derivatives

Wu, Tzi‐Yi; Liao, Jian-Wei; Chen, Chen-Yu

doi:10.1016/j.electacta.2014.10.116

Cited by 37 publications

(24 citation statements)

References 65 publications

(70 reference statements)

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“…An IL was placed into the dilatometer up to the mark, the top of the capillary tube (located on the top of the dilatometer) was sealed, and the dilatometer (with capillary tube) was placed into a thermostatic water bath. The main interval between the two marks in the capillary tube was 0.01 cm 3 , and the minor interval between the two marks was 0.001 cm 3 . From the correction coefficient of glycerin in the capillary tube at different temperatures, the density of neat IL or LiTFSI-doped IL by the expanded liquid volume in the capillary tube at various temperatures was calculated.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Influence of LiTFSI Addition on Conductivity, Diffusion Coefficient, Spin–Lattice Relaxation Times, and Chemical Shift of One-Dimensional NMR Spectroscopy in LiTFSI-Doped Dual-Functionalized Imidazolium-Based Ionic Liquids

Wang

et al. 2015

J. Chem. Eng. Data

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An ionic liquid (IL) 1-allyl-3-(2-methoxyethyl)imidazolium bis(trifluoromethylsulfonyl)imide ([AMO][TFSI]) is prepared, and the effect of the addition of LiTFSI into [AMO][TFSI] on the transport and physicochemical properties is studied herein. The diffusion coefficients of 1 H, 7 Li, and 19 F are determined using pulsed-gradient spin−echo NMR to study the dynamics of all ion species. The neat [AMO][TFSI] and LiTFSI-doped [AMO][TFSI] give approximately straight lines for the relationship of D vs Tη −1 , demonstrating that the Stokes−Einstein equation holds for the ionic diffusivity in the binary system. NMR T 1 relation time measurements show the 1 H-T 1 and 19 F-T 1 of LiTFSI-doped [AMO] [TFSI] decrease with the increase of Li salt concentration, which is due to the viscosity increases and the formation of stable coordination adducts of Li and TFSI when the salt concentration increases. From the study of chemical shift in one-dimensional NMR spectroscopy, an upfield shift in 1 H and 19 F spectra is observed in ILs with increasing lithium salt concentration; the formation of ion clusters is the dominant effect after the addition of LiTFSI in [AMO] [TFSI].

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Influence of LiTFSI Addition on Conductivity, Diffusion Coefficient, Spin–Lattice Relaxation Times, and Chemical Shift of One-Dimensional NMR Spectroscopy in LiTFSI-Doped Dual-Functionalized Imidazolium-Based Ionic Liquids

Wang

et al. 2015

J. Chem. Eng. Data

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“…The optical switching times were defined as the time taken for 90% of the total absorbance change [46,47]. The electrochemical stability was evaluated by a chronoamperometry experiment, using the same experimental conditions, but over an extended cycling interval (ca.…”

Section: Electrochromic Properties Evaluationmentioning

confidence: 99%

Novel hybrid based on a poly[Ni( salen )] film and WO 3 nanoparticles with electrochromic properties

Nunes

Moura

Hillman

et al. 2017

Electrochimica Acta

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The strategy of combining electroactive polymers and inorganic nanomaterials has been widely explored in recent years in order to improve some of their properties, namely electrocatalysis and electrochromism. This report focuses on a new composite prepared through the electropolymerization of the transition metal complex ], designated as [1], in the presence of WO3 nanoparticles (NPs) and its electrochromic (EC) performance. The WO3 NPs were prepared using tungsten metal powder; their characterization indicated quasi-spherical morphology, high crystallinity and particle sizes in the range 30 -40 nm. The nanocomposite WO3@poly[1] films displayed similar electrochemical responses to those of pristine poly[1] films in LiClO4/CH3CN, but higher electroactive surface coverages, an advantage of NPs incorporation in the nanocomposite.The presence of the WO3 NPs in the poly[1] matrix was assessed by X-ray photoelectron spectroscopy and scanning electronic microscopy. The nanocomposite presented similar electronic spectra to those of poly [1], indicating that the electronic structure of the pristine film is maintained in the nanocomposite, but exhibited lower ε-values for bands associated with charge transfer transitions for high oxidised states, revealing an enhanced stability towards ligand over-oxidation.The WO3@poly[1] nanocomposite showed more favourable EC properties in LiClO4/CH3CN than the pristine film. For typical coverages (Γ = 0.06-0.10 µmol cm -2 ) the composite showed lower switching times (τ = 1.3 -3.6 s), higher optical contrast (∆T ≈ 31 %, an improvement of ca. 40 %) and better colouration efficiencies (in the range η = 104 -115 cm 2 C -1 , improvement of ca. 13 -22 %).(cathodic EC material) [23,24]. These properties make it an attractive "partner" for CPs (or other electroactive polymers) in hybrid materials for EC applications. In fact, several EC nanocomposites based in the incorporation of WO3 nanostructures into CP matrices, such as polyaniline (PANI) [23][24][25][26][27] and poly(3,4-ethylenedioxythiophene) (PEDOT)[28], have already been reported, exploiting the complementary EC attributes of WO3 and CPs. In general, CPs exhibit interesting optical properties, with rich colour changes due to their multiple redox states, but have low colour switching rates due to the slow transport of charge balancing counter ions ("dopants") into the polymer layer. On the other hand, metal oxide nanostructures have high surface-to-volume ratio and organized structures that facilitate ion/electron intercalation processes and promote switching reversibility [10,29]. Thus, the resultant nanocomposites promise the advantage of synergistic influence of the WO3 on the EC properties of conducting polymer, presenting improved EC properties with more satisfactory switching speeds and colouration efficiencies [23,25,27].The poly[M(salen)]-type films (M ≡ transition metal) are a particular class of electroactive metallopolymers, derived from metal salen complexes, recently studied by their interesting EC behavior [30,31]. Th...

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“…These polymers are widely applied in the daily life and investigated [1][2][3][4][5][6]. For example, they can be used in packing, electrical products, and composites [7][8][9][10][11][12]. In recent years, novel polymeric materials showing biodegradability, or biodegradable polymers, have attracted considerable interest [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Ternary miscibility with specific interactions in novel blends comprising biodegradable polymers and a natural polyphenol

2015

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Novel miscible ternary blends comprising poly(ethylene azelate) (PEAz) and poly(ε-caprolactone) (PCL), which are biodegradable polymers, and catechin, a natural polyphenol, were discovered. The inherent biodegradability of PEAz and PCL and the biocompatibility of catechin enable these blends to be used for manufacturing functional polymeric materials. The PEAz/catechin/PCL blends exhibit homogeneous phase morphology and one single T g for each of the ternary compositions, demonstrating that the blends are with ternary miscibility. The phenomenon of melting point depression found in the blends confirmed that the PEAz/catechin/PCL blends are inherently miscible with thermodynamically favorable interactions. It also revealed that catechin formed hydrogen-bonding interactions with the polyesters PEAz and PCL in the ternary blends. Ternary miscibility in the PEAz/catechin/PCL blends might be mainly attributed to two factors: (1) a negligible ΔK effect resulting from the symmetric hydrogen-bonding interactions between catechin and PEAZ and between catechin and PCL, and (2) a minimal Δχ effect caused by a slight difference in the solubility parameters of PEAz and PCL in the blends. In these miscible ternary blends, the nonisothermal crystallization of crystalline polyesters was retarded as the catechin content was increased.

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Electrochemical synthesis, characterization and electrochromic properties of indan and 1,3-benzodioxole-based poly(2,5-dithienylpyrrole) derivatives

Cited by 37 publications

References 65 publications

Influence of LiTFSI Addition on Conductivity, Diffusion Coefficient, Spin–Lattice Relaxation Times, and Chemical Shift of One-Dimensional NMR Spectroscopy in LiTFSI-Doped Dual-Functionalized Imidazolium-Based Ionic Liquids

Influence of LiTFSI Addition on Conductivity, Diffusion Coefficient, Spin–Lattice Relaxation Times, and Chemical Shift of One-Dimensional NMR Spectroscopy in LiTFSI-Doped Dual-Functionalized Imidazolium-Based Ionic Liquids

Novel hybrid based on a poly[Ni( salen )] film and WO 3 nanoparticles with electrochromic properties

Ternary miscibility with specific interactions in novel blends comprising biodegradable polymers and a natural polyphenol

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