CAJ | 학술논문

合成了一种以三苯胺(TPA)为核、偶联噻吩为端基的有机小分子4,4?4?-三[4-(2-联噻吩基)苯基]胺(TBTPA),并通过电化学聚合得到其相应的聚合物PTBTPA.运用电化学工作站和紫外-可见光谱仪连用对该聚合物膜的光谱电化学性质进行了测试.与先前已报道的三[4-(2-噻吩基)苯基]胺(TTPA)相比, TBTPA呈现出更好的电化学氧化还原活性.在电化学聚合过程中, PTBTPA膜呈现出更好的成膜性能且在不同的电位下可以显示三种颜色(深橙色、橄榄绿、暗灰色).此外,光谱电化学测试结果表明,与先前报道的PTTPA相比, PTBTPA具有更好的电致变色(EC)性能,高的颜色对比度(44.7%),更高的透射对比度(ΔT,在720及1100 nm处对比度分别为49%和52%)及较快的响应时间(在720 nm时为0.93 s,在1100 nm时为0.91 s),同时, PTBTPA具有更高的着色效率(720 nm时为198 cm2·C-1,1100 nm时为285 cm2·C-1).从扫描电镜(SEM)照片得出PTBTPA薄膜呈现微球颗粒堆积形貌,颗粒粒径为500 nm左右,比PTTPA的粒径小.良好的性能表明PTBTPA在电致变色器件上具有很大的应用前景.
합성료일충이삼분알(TPA)위핵、우련새분위단기적유궤소분자4,4?4?-삼[4-(2-련새분기)분기]알(TBTPA),병통과전화학취합득도기상응적취합물PTBTPA.운용전화학공작참화자외-가견광보의련용대해취합물막적광보전화학성질진행료측시.여선전이보도적삼[4-(2-새분기)분기]알(TTPA)상비, TBTPA정현출경호적전화학양화환원활성.재전화학취합과정중, PTBTPA막정현출경호적성막성능차재불동적전위하가이현시삼충안색(심등색、감람록、암회색).차외,광보전화학측시결과표명,여선전보도적PTTPA상비, PTBTPA구유경호적전치변색(EC)성능,고적안색대비도(44.7%),경고적투사대비도(ΔT,재720급1100 nm처대비도분별위49%화52%)급교쾌적향응시간(재720 nm시위0.93 s,재1100 nm시위0.91 s),동시, PTBTPA구유경고적착색효솔(720 nm시위198 cm2·C-1,1100 nm시위285 cm2·C-1).종소묘전경(SEM)조편득출PTBTPA박막정현미구과립퇴적형모,과립립경위500 nm좌우,비PTTPA적립경소.량호적성능표명PTBTPA재전치변색기건상구유흔대적응용전경.
An electrochromic (EC) material consisting of triphenylamine (TPA) core and peripheral bithiophene groups was synthesized, and the corresponding polymer was prepared by electrochemical oxidative cross-linking. The electrochemical properties of the 4,4?,4?-tris[4-(2-bithienyl)phenyl]amine (TBTPA) monomer, and spectroelectrochemical and electrochromic properties of the poly(4,4?,4?-tris [4-(2-bithienyl)phenyl]amine) (PTBTPA) polymer, were also systematical y investigated. TBTPA possessing two thiophene groups exhibited better redox reversibility than that of the reported tris[4-(2-thienyl)phenyl] amine (TTPA). During electropolymerization, PTBTBA exhibited excel ent film-forming property and strong adhesion to the ITO electrode, satisfying the basic requirements for achieving high EC performance. PTBTPA exhibited three different colors under various potentials (darkorange, olivegreen and dimgray). PTBTPA indicated enhanced EC performances and a higher contrast ratio of 44.7%compared with that of reported poly(tris[4-(2-thienyl)phenyl]amine) (PTTPA). PTBTPA also exhibited a higher optical contrast (ΔT) of 49% and 52% at 720 and 1100 nm, respectively. It showed fast switching responses of 0.93 and 0.91 s at 720 and 1100 nm, respectively, and higher coloration efficiencies of 198 and 285 cm2·C-1 at 720 and 1100 nm, respectively. Scanning electron microscopy (SEM) revealed that the PTBTPA film surface had accumulated clusters of globules, which were smal er than those of PTTPA. The superior performances of PTBTPA suggested its potential as an efficient EC material.