当前位置:
X-MOL 学术
›
Macromolecules
›
论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Fulvenyl-Functionalized Polyisocyanides: Cross-Conjugated Electrochromic Polymers with Variable Optical and Electrochemical Properties
Macromolecules ( IF 5.5 ) Pub Date : 2018-07-11 00:00:00 , DOI: 10.1021/acs.macromol.8b00977 Sandra Schraff 1 , Yu Sun 2 , Frank Pammer 1
Macromolecules ( IF 5.5 ) Pub Date : 2018-07-11 00:00:00 , DOI: 10.1021/acs.macromol.8b00977 Sandra Schraff 1 , Yu Sun 2 , Frank Pammer 1
Affiliation
We describe the preparation of arylisocyanide monomers bearing conjugated fulvenyl groups derived from 9-benzylidene-9H-fluorene (Flu), 5-benzylidene-1,2,3,4-tetraphenylcyclopentadiene (TPCp), and 5-benzylidene-5H-dibenzo[a,d]cycloheptene (Dbs). The electrochemical and optical properties of the monomers and their precursors have been characterized and consistently showed the effect of the conjugation of the respective functional group (−NO2, −NH2, −NHCHO, and −N≡C) with the fulvenyl moiety. The isocyanides have been subsequently polymerized to the corresponding polyisocyanides (PICs), which exhibited number-average molecular weights of 124–136 kDa (PDI = 2.0–2.7), as determined by gel permeation chromatography in THF vs polystyrene standards. The thermal, optical, and electrochemical properties of the polymers have been studied in detail. Spectroelectrochemical analyses of polymers equipped with redox-active pentafulvene groups show reversible electrochromism, which allows to lower the optical gap from 2.38 to 1.20 eV (Flu) and from 2.27 to 1.55 eV (TPCp) via chemical or electrochemical reduction.
中文翻译:
富烯基官能化的多异氰酸酯:具有可变光学和电化学性质的交叉共轭电致变色聚合物
我们描述arylisocyanide单体轴承9亚苄基9衍生的共轭fulvenyl基团的制备ħ芴(流感),5-亚苄基-1,2,3,4-四苯基环戊二烯(TPCP),和5-苄基-5- ħ -二苯并[ a,d ]环庚烯(Dbs)。单体及其前体的电化学和光学性质已得到表征,并始终显示出各个官能团(-NO 2,-NH 2,-NHCHO和-N = C)带有黄酮基部分。异氰酸酯随后已聚合成相应的多异氰酸酯(PIC),其聚四氢呋喃与聚苯乙烯标准品相比,通过凝胶渗透色谱法测定的数均分子量为124-136 kDa(PDI = 2.0-2.7)。已经详细研究了聚合物的热,光学和电化学性质。配备有氧化还原活性五氟戊烯基团的聚合物的光谱电化学分析显示可逆电致变色,可通过化学或电化学还原将光学间隙从2.38降低至1.20 eV(Flu),将光学间隙从2.27降低至1.55 eV(TPCp)。
更新日期:2018-07-11
中文翻译:
富烯基官能化的多异氰酸酯:具有可变光学和电化学性质的交叉共轭电致变色聚合物
我们描述arylisocyanide单体轴承9亚苄基9衍生的共轭fulvenyl基团的制备ħ芴(流感),5-亚苄基-1,2,3,4-四苯基环戊二烯(TPCP),和5-苄基-5- ħ -二苯并[ a,d ]环庚烯(Dbs)。单体及其前体的电化学和光学性质已得到表征,并始终显示出各个官能团(-NO 2,-NH 2,-NHCHO和-N = C)带有黄酮基部分。异氰酸酯随后已聚合成相应的多异氰酸酯(PIC),其聚四氢呋喃与聚苯乙烯标准品相比,通过凝胶渗透色谱法测定的数均分子量为124-136 kDa(PDI = 2.0-2.7)。已经详细研究了聚合物的热,光学和电化学性质。配备有氧化还原活性五氟戊烯基团的聚合物的光谱电化学分析显示可逆电致变色,可通过化学或电化学还原将光学间隙从2.38降低至1.20 eV(Flu),将光学间隙从2.27降低至1.55 eV(TPCp)。