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Multielectrochromic Copolymers Based on Thiophene Derivatives: Tunable Optoelectronic Properties
Yafei Guo,Gaoyong Liang,Mengjie Dong,Meihui Wang,Xinmin Hao 한국섬유공학회 2022 Fibers and polymers Vol.23 No.9
In this study, a series of copolymers based on 3-methoxythiophene(MOT) and 3,4-ethylenedioxythiophene(EDOT) have been prepared by electrochemical method in boron trifluoride diethyl etherate (BFEE). The copolymers arecharacterized by FTIR, XPS, SEM and cyclic voltammograms. The MOT/EDOT ratio in the polymer chain decreases withthe decreasing MOT/EDOT feed ratio, and low polymerization potential incorporates more EDOT units into the polymerchain. The electrochromic properties of the copolymers can be greatly tuned by the applied MOT/EDOT feed ratio. Absorption peak of the neutral copolymer presents red-shift with increasing feed ratio, and each copolymer has multicolorelectrochromism. In addition, the copolymers present fast-switching response, reasonable coloration efficiency and goodstability. All these indicate that the copolymers based on facile, commercial MOT and EDOT are promising candidates forelectrochromic applications.
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Yajing Tang,Sunwei Qiu,Haimei Li,Feifei Si,Mengjie Zhao,Min Dong,Meirong Pan,Xinxin Yue,Lu Liu,Qiujin Qian,Yufeng Wang 대한신경정신의학회 2023 PSYCHIATRY INVESTIGATION Vol.20 No.9
Objective Subthreshold attention-deficit/hyperactivity disorder (ADHD) has been suggested to be a “morbid condition” which also needs medical attention.Methods The present study recruited 89 children with subthreshold ADHD (sADHD), 115 children with diagnosed ADHD (cADHD), and 79 healthy controls (HC) to explore the clinical manifestation, executive functions (EFs) of sADHD, and the caregiver strain. The clinical manifestation was evaluated through clinical interviews and parent-reports. Executive functions were assessed both experimentally and ecologically. Caregiver strain was measured by a parent-reported questionnaire.Results For the clinical manifestation, both sADHD and cADHD indicated impairments when compared with HC. The comorbidities and the scaled symptoms indicated that the externalizing behaviors were relatively less serious in sADHD than cADHD, whereas the internalizing behaviors between two groups were comparable. For ecological EFs, sADHD scored between cADHD and HC in inhibition and working memory. For experimental EFs, sADHD was comparable to cADHD in inhibition, shifting, and was worse than cADHD in verbal working memory. For the caregiver strain, all scores of sADHD were between that in cADHD and that in HC.Conclusion Our present findings supported the suggestion of subthreshold ADHD as “morbid condition,” which should be treated with caution in clinical practice, especially for the internalizing behaviors and some key components of EFs.
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