公开(公告)号：US12065535B2

公开(公告)日：2024-08-20

申请号：US17267711

申请日：2019-08-15

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Masayoshi Higuchi ,  Manas Kumar Bera

IPC: C08G61/12 ,  C09K9/02 ,  G02F1/1516 ,  G02F1/155 ,  H05B45/10

CPC classification number: C08G61/122 ,  C09K9/02 ,  G02F1/15165 ,  G02F1/155 ,  C08G2261/376 ,  C09K2211/187 ,  H05B45/10

Abstract: The present invention addresses a first problem of providing a polymer that has electrochromic characteristics, and that can form a sheet which seems more transparent when applied to an electrochromic element and is decolored. The present invention for solving the problem is a polymer obtained by forming a complex between, and binding together, compound A represented by formula 1: BP1-L1-BP2 and at least one specific metal ion selected from the group consisting of first metal ions having a coordination number of 4, second metal ions having a coordination number of 6, and third metal ions having a coordination number of 4 and 6. In the formula, L1 represents a single bond or a divalent group, and BP1 and BP2 may be identical or different from each other and each independently represent a bipyridine derivative.