Electrochromic Os(II)-Based Metallo-Supramolecular Polymers

被引：48
|
作者：
Bera, Manas Kumar [1 ]
Chakraborty, Chanchal [1 ,2 ]
Rana, Utpal [1 ]
Higuchi, Masayoshi [1 ]
机构：
[1] Natl Inst Mat Sci, Res Ctr Funct Mat, Elect Funct Macromol Grp, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan
[2] Birla Inst Technol & Sci, Dept Chem, Pilani Hyderabad Campus, Hyderabad 500078, India
来源：
MACROMOLECULAR RAPID COMMUNICATIONS | 2018年 / 39卷 / 22期
基金：
日本科学技术振兴机构;
关键词：
coloration efficiency; electrochromism; Os(II)-based metallo-supramolecular polymers; solid-state devices; COMPLEXES; PYRIDINE; CONTRAST;
D O I：
10.1002/marc.201800415
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
This work presents the preparation of a series of novel Os(II)-based metallo-supramolecular polymers (polyOss: linear polyOsL1(100%) and hyperbranched polyOsL1(x%)L2(y%)) that show a broad absorption spanning 312 to 677 nm and a low Os(II)/(III) redox potential of 0.94 V. The electrochromic properties of a polyOs film cast on an ITO substrate is investigated. The change in transmittance (Delta T) of polyOsL1(100%) is 49.9%, and the switching times for coloration (t(c)) and bleaching (t(b)) are 0.70 and 0.82 s, respectively. The introduction of a 10% branching structure (polyOsL1(90%)L2(10%)) further enhanced the electrochromic performance with Delta T = 59.4%, t(c) = 0.41 s, and t(b) = 0.54 s. The coloration efficiency (eta) increased from 396.1 to 467.5 cm(2) C-1 upon branching. A solid-state electrochromic device with polyOsL1(100%) is successfully fabricated to use the polymer for potential applications.
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页数：6
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