1. Anion-Controlled Architecture and Photochromism of Naphthalene Diimide-Based Coordination Polymers.
- Author
-
Liu, Jian-Jun, Xia, Shu-Biao, Duan, Yu-Lian, Liu, Teng, Cheng, Fei-Xiang, and Sun, Cheng-Ke
- Subjects
PHOTOCHROMISM ,NAPHTHALENE ,COORDINATION polymers ,POLYMER structure ,CHARGE exchange - Abstract
Three newcadmiumcoordination polymers, namely [Cd(NO
3 )2(DPNDI)(CH3OH)]·CH3OH(1), [Cd(SCN)2 (DPNDI)] (2), and [Cd(DPNDI)2 (DMF)2]·2ClO4 (3) (DPNDI = N,N-di(4-pyridyl)-1,4,5,8- naphthalene diimide, DMF = N,N-dimethylformamide) have been synthesized by reactions of DPNDI with Cd(NO3 )2 , Cd(SCN)2, and Cd(ClO4 )2 , respectively. Compound 1 is a one-dimensional coordination polymer with strong lone pair-π interactions between the coordinated NO3 - anions and the imide ring of DPNDI; while 2 is a two-dimensional network with a (4, 4) net topology. In the case of 3, due to the presence of uncoordinated perchlorate counter ions, it exhibits a non-interpenetrated square-grid coordination polymer containing one-dimensional rhomboid channels. The structural diversity in these compounds is attributed to different coordination abilities and geometries of counter anions. Due to the presence of electron-deficient NDI moiety, the photochromic behavior of these compounds was studied. Interestingly, only compounds 1 and 3 exhibit color changes under light irradiation. The influence of the anions on the photochromism process of the NDI-based materials has been discussed. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF