Alan G Macdiarmid Institute

Alan, China

Alan G Macdiarmid Institute

Alan, China
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Yan Y.,Alan G Macdiarmid Institute | Sun N.,Alan G Macdiarmid Institute | Li F.,Jilin University | Jia X.,University of Wollongong | And 2 more authors.
ACS Applied Materials and Interfaces | Year: 2017

Multiple stimuli-responsive fluorescent materials have gained increasing attention for their fundamental investigation and intelligent applications. In this work, we report design and synthesis of a novel polyamic acid bearing oligoaniline, triphenylamine, and fluorene groups, which served as sensitive units and fluorescence emission unit, respectively. The resulting polymer exhibits multiple stimuli-responsive fluorescence switching behavior triggered by redox species, pH, electrochemical, and pressure stimuli. Every fluorescence switching mechanism upon each stimulus was studied in detail. The interactions and energy transfer between sensitive units and emission unit are largely responsible for this fascinating fluorescent switching behavior. This work provides a deep understanding of the optical switching essence upon these stimuli, opening the way for the development of new fluorescent sensing applications. © 2017 American Chemical Society.


Yin M.,Alan G Macdiarmid Institute | Li F.,State Key Laboratory of Superhard MaterialsJilin UniversityChangchun130012 Peoples Republic of China | Yan Y.,Alan G Macdiarmid Institute | Liu X.,Alan G Macdiarmid Institute | And 2 more authors.
Journal of Polymer Science, Part A: Polymer Chemistry | Year: 2016

We describe the synthesis of a novel electroactive photo-crosslinkable poly(aryl ether), containing tetraaniline pendants and allyl groups (EPPAE). The polymer structure and spectral properties are studied in detail. By introducing the electroactive tetraaniline pandents, EPPAE reveals reversible electrochemical activity, expected electrochromic behavior and good anticorrosive performance. After crosslinking the allyl groups with UV exposure, the resultant polymer (c-EPPAE) shows drastic change in electrochemical properties. The c-EPPAE/ITO electrode exhibits declining electroactivity but excellent electrochemical stability, which are associated with densification of the electroactive layer. Furthermore, in the corrosive protection measurements, c-EPPAE reveals an outstanding protection efficiency (99.92%) for stainless steel substrates. A comprehensive study of electrochromic properties and corrosive protection of EPPAE before and after UV exposure will provide an insightful tool for the developing electrochromic smart windows, electrochromic displays, and anticorrosive paint. © 2016 Wiley Periodicals, Inc.


Li Y.,Alan G Macdiarmid Institute | Liu C.,Alan G Macdiarmid Institute | Jiao L.,Alan G Macdiarmid Institute | Song G.,Alan G Macdiarmid Institute | And 2 more authors.
High Performance Polymers | Year: 2014

A series of autophotosensitive semiaromatic hyperbranched polyimides (PIs) were prepared by (A2 = B3)-type method and endcapped with 2,6-dimethylaniline. The photosensitive hyperbranched PIs (PHBPIs) showed excellent solubility, excellent optical properties, and low birefringences in the range of 0.0022-0.0042 caused by their special hyperbranched structures and alicyclic chain segments reduced both intramolecular and intermolecular charge transfer complex effect. It also showed excellent mechanical properties with tensile modulus in the range of 1.37-1.60 GPa and good thermal stabilities. Photolithographic property of the polymer was examined by ultraviolet exposure. Scanning electron microscopic analysis revealed a highly resolved pattern with a line width of 8 μm. © The Author(s) 2014.


Xie M.,Alan G Macdiarmid Institute | Yin M.,Alan G Macdiarmid Institute | Nie G.,Alan G Macdiarmid Institute | Wang J.,Alan G Macdiarmid Institute | And 3 more authors.
Journal of Polymer Science, Part A: Polymer Chemistry | Year: 2016

We described the design and synthesis of a modified poly(aryl ether ketone) bearing phenolphthalein and allyl groups (P-PAEK) via nucleophilic polycondensation. A new kind of composite separator, crosslinked P-PAEK/polyvinylidene fluoride (c-P-PAEK/PVDF) membrane was successfully prepared using phase separation, phase inversion method, and UV crosslinking technique. As a separator of lithium-ion battery, c-P-PAEK/PVDF membrane demonstrates high porosity and uniform distribution of pores with interconnected pathways. Low thermal shrinkage, distinct shut-down effect, high liquid electrolyte uptake capacity, and exciting liquid electrolyte wettability of the prepared c-P-PAEK/PVDF membrane have been revealed through comprehensive study. Moreover, the c-P-PAEK/PVDF membrane was applied to assemble a conventional Li/LiFePO4 coin cell, which exhibited hopeful cell performance. © 2016 Wiley Periodicals, Inc.

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