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一种具有部分电荷转移的TCNQ自由基和异常导电行为的钴（II）自旋交叉化合物。

A cobalt(ii) spin-crossover compound with partially charged TCNQ radicals and an anomalous conducting behavior.

作者信息

Zhang Xuan, Wang Zhao-Xi, Xie Haomiao, Li Ming-Xing, Woods Toby J, Dunbar Kim R

机构信息

Department of Chemistry , Texas A&M University , College Station , TX 77842-3012 , USA . Email:

Department of Chemistry , Innovative Drug Research Center , Shanghai University , Shanghai 200444 , P. R. China . Email:

出版信息

Chem Sci. 2016 Feb 1;7(2):1569-1574. doi: 10.1039/c5sc03547c. Epub 2015 Dec 8.

DOI:10.1039/c5sc03547c
PMID:28808532
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5530863/
Abstract

The bifunctional salt Co(terpy)·CHCN (terpy = 2,2';6',2''-terpyridine, TCNQ = 7,7,8,8-tetracyanoquino-dimethane) exhibits a high room temperature conductivity of 0.13 S cm and an anomaly in conductivity at ∼190 K as evidenced by variable temperature structural, magnetic and conductivity studies. The anomaly in the conductivity at 190 K has been correlated with the temperature dependent structural breathing and Jahn-Teller distortion of the low spin state of the SCO units, as well as the charge fluctuations and supramolecular π-stacking interactions of partially charged TCNQ radicals. The modular synthetic approach leads to an accessible source of partially charged TCNQ radicals for the facile preparation of bifunctional molecular materials with high electrical conductivity.

摘要

双功能盐Co(terpy)·CHCN（terpy = 2,2';6',2''-三联吡啶，TCNQ = 7,7,8,8-四氰基对苯二醌二甲烷）表现出0.13 S cm的高室温电导率，并且在约190 K时电导率出现异常，变温结构、磁性和电导率研究证明了这一点。190 K时电导率的异常与SCO单元低自旋态的温度依赖性结构呼吸和 Jahn-Teller 畸变相关，也与部分带电的TCNQ自由基的电荷涨落和超分子π-堆积相互作用相关。模块化合成方法为轻松制备具有高电导率的双功能分子材料提供了一种可获得部分带电TCNQ自由基的途径。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e280/5530863/f2a1e081f22b/c5sc03547c-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e280/5530863/20b19721b500/c5sc03547c-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e280/5530863/0f17b542d0a8/c5sc03547c-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e280/5530863/7090bde18747/c5sc03547c-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e280/5530863/f2a1e081f22b/c5sc03547c-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e280/5530863/20b19721b500/c5sc03547c-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e280/5530863/5d6b7259ed45/c5sc03547c-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e280/5530863/21874c119dcf/c5sc03547c-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e280/5530863/0f17b542d0a8/c5sc03547c-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e280/5530863/7090bde18747/c5sc03547c-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e280/5530863/f2a1e081f22b/c5sc03547c-f6.jpg

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