Self-assembly of Tetraaniline-PEG-Tetraaniline Block Copolymer Thin Films

张广萌,; 杨继萍,; 陈功,

doi:10.6023/a13101051

Cited by 5 publications

(2 citation statements)

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“…Carboxyl‐capped tetraaniline (HOOC‐(Ani) 4 ‐COOH), carboxyl‐capped pentaaniline (HOOC‐(Ani) 5 ‐COOH), carboxyl‐capped hexaaniline (HOOC‐(Ani) 6 ‐COOH) and carboxyl‐capped star‐shaped tetraaniline (Tri‐(Ani) 4 ‐COOH) in leucoemeraldine base state (LEB) were synthesized according to the literatures . The structure formula of self‐doped oligoaniline derivatives are shown in Scheme .…”

Section: Methodsmentioning

confidence: 99%

Self‐Doped Oligoaniline Electrochromic Devices: Fabrication and Effect of the Oligoaniline Molecular Architecture

et al. 2017

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A series of self‐doped oligoaniline derivatives, that is, carboxyl‐capped tetraaniline (HOOC‐(Ani)4‐COOH), carboxyl‐capped pentaaniline (HOOC‐(Ani)5‐COOH), carboxyl‐capped hexaaniline (HOOC‐(Ani)6‐COOH), and carboxyl‐capped star‐shaped tetraaniline (Tri‐(Ani)4‐COOH) in leucoemeraldine base state, were synthesized and characterized. The number of the aniline units was varied and a star‐shaped structure was designed to detect the influence of the molecular architecture on the electrochromic properties. The introduction of carboxylic groups into oligoaniline derivatives produced intermolecular hydrogen bonds, which contributed to their self‐doping capability. As a result, these oligoaniline derivatives presented reversible electrochromic properties at pH≥7, which could not be seen in pristine oligoanilines or polyanilines. Then, these oligoaniline derivatives were fabricated into electrochromic devices without an external acid dopant in the assembling process. Comprehensive electrochemical tests were conducted to investigate their electrochromic properties. The resulting devices showed good performances in spectroscopic, electrochemical, and in situ tests. Increasing the chain length contributed to an improved optical contrast, coloration efficiency, response time, and cycling stability. Meanwhile, introducing a star‐shaped structure also led to a better electrochromic performance. Moreover, electrochemical impedance spectroscopy and AFM tests were used to explore the mechanism to understand how the star‐shaped molecule facilitated the redox process.

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Section: Methodsmentioning

confidence: 99%

Self‐Doped Oligoaniline Electrochromic Devices: Fabrication and Effect of the Oligoaniline Molecular Architecture

et al. 2017

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“…Size and morphology of triblock copolymer. For aqueous self-assembly of nonionic amphiphilic triblock copolymer, a sample solution was prepared in double-distilled water 42 . To study the effect of oxidation state and doping on the size and morphology, the samples were prepared in their LEB, EB, and ES states.…”

Section: Critical Micelle Concentration (Cmc)mentioning

confidence: 99%

A unique amphiphilic triblock copolymer, nontoxic to human blood and potential supramolecular drug delivery system for dexamethasone

Mushtaq

Akhter

Farooq

et al. 2021

Sci Rep

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The drug delivery system (DDS) often causes toxicity, triggering undesired cellular injuries. Thus, developing supramolecules used as DDS with tunable self-assembly and nontoxic behavior is highly desired. To address this, we aimed to develop a tunable amphiphilic ABA-type triblock copolymer that is nontoxic to human blood cells but also capable of self-assembling, binding and releasing the clinically used drug dexamethasone. We synthesized an ABA-type amphiphilic triblock copolymer (P2L) by incorporating tetra(aniline) TANI as a hydrophobic and redox active segment along with monomethoxy end-capped polyethylene glycol (mPEG2k; Mw = 2000 g mol−1) as biocompatible, flexible and hydrophilic part. Cell cytotoxicity was measured in whole human blood in vitro and lung cancer cells. Polymer-drug interactions were investigated by UV–Vis spectroscopy and computational analysis. Our synthesized copolymer P2L exhibited tuned self-assembly behavior with and without external stimuli and showed no toxicity in human blood samples. Computational analysis showed that P2L can encapsulate the clinically used drug dexamethasone and that drug uptake or release can also be triggered under oxidation or low pH conditions. In conclusion, copolymer P2L is nontoxic to human blood cells with the potential to carry and release anticancer/anti-inflammatory drug dexamethasone. These findings may open up further investigations into implantable drug delivery systems/devices with precise drug administration and controlled release at specific locations.

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A Solution-Processable (Tetraaniline-b -Polyethylene Glycol)₃ Star-Shaped Rod-Coil Block Copolymer with Enhanced Electrochromic Properties

Cao

Gong

Yang

2015

Macromol. Rapid Commun.

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A novel electroactive star-shaped rod-coil copolymer composed of a benzene core and three symmetrically positioned tetraaniline-b-poly(ethylene glycol) arms, (TAni-b-PEG)3 rod-coil block copolymer, is synthesized successfully and characterized using Fourier transform infrared spectroscopy (FTIR), UV-vis, (1)H NMR, and matrix-assisted laser desorption/ionization (MALDI) mass spectrometry. Uniform and high-quality (TAni-b-PEG)3 thin films onto indium tin oxide-coated glass surface are fabricated simply from its DMF solution. Resulting (TAni-b-PEG)3 copolymer thin films possess excellent electrochromic properties with a high optical contrast of 73.3%, superb coloration efficiency of 318.5 cm(2) C(-1) at 750 nm. Very short switching times, that is, 2.11 s and 2.14 s for coloring and bleaching times, respectively, are observed as well. The mechanism of these impressive electrochromic properties of (TAni-b-PEG)3 thin films possessed is proposed based on the atomic force microscopy investigation, star-shaped molecular geometry, synergetic electronic and ionic conductivity and amphiphilic self-assembly feature of (TAni-b-PEG)3 copolymer, which can self-assemble to form cylinder pattern consisting of quick pathways for electronic charges and ionic species, respectively.

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Self-assembly of Tetraaniline-PEG-Tetraaniline Block Copolymer Thin Films

Cited by 5 publications

References 5 publications

Self‐Doped Oligoaniline Electrochromic Devices: Fabrication and Effect of the Oligoaniline Molecular Architecture

Self‐Doped Oligoaniline Electrochromic Devices: Fabrication and Effect of the Oligoaniline Molecular Architecture

A unique amphiphilic triblock copolymer, nontoxic to human blood and potential supramolecular drug delivery system for dexamethasone

A Solution-Processable (Tetraaniline-b -Polyethylene Glycol)₃ Star-Shaped Rod-Coil Block Copolymer with Enhanced Electrochromic Properties

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Self-assembly of Tetraaniline-PEG-Tetraaniline Block Copolymer Thin Films

Cited by 5 publications

References 5 publications

Self‐Doped Oligoaniline Electrochromic Devices: Fabrication and Effect of the Oligoaniline Molecular Architecture

Self‐Doped Oligoaniline Electrochromic Devices: Fabrication and Effect of the Oligoaniline Molecular Architecture

A unique amphiphilic triblock copolymer, nontoxic to human blood and potential supramolecular drug delivery system for dexamethasone

A Solution-Processable (Tetraaniline-b -Polyethylene Glycol)3 Star-Shaped Rod-Coil Block Copolymer with Enhanced Electrochromic Properties

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A Solution-Processable (Tetraaniline-b -Polyethylene Glycol)₃ Star-Shaped Rod-Coil Block Copolymer with Enhanced Electrochromic Properties